/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/fibonacci.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 21:13:28,264 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 21:13:28,266 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 21:13:28,299 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 21:13:28,345 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 [2021-03-10 21:13:28,374 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 21:13:28,374 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 21:13:28,375 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 21:13:28,375 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 21:13:28,377 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 21:13:28,377 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 21:13:28,377 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 21:13:28,377 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 21:13:28,378 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 21:13:28,378 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 21:13:28,378 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 21:13:28,378 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 21:13:28,379 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 21:13:28,379 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 21:13:28,379 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 21:13:28,379 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 21:13:28,379 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 21:13:28,379 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 21:13:28,379 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 21:13:28,379 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 21:13:28,379 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 21:13:28,379 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 21:13:28,380 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 21:13:28,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 21:13:28,380 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 21:13:28,380 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 21:13:28,380 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 21:13:28,380 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 21:13:28,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 21:13:28,380 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 21:13:28,380 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 21:13:28,380 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 21:13:28,593 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 21:13:28,608 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 21:13:28,610 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 21:13:28,611 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 21:13:28,612 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 21:13:28,612 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/fibonacci.wvr.bpl [2021-03-10 21:13:28,612 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/fibonacci.wvr.bpl' [2021-03-10 21:13:28,704 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 21:13:28,708 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 21:13:28,709 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 21:13:28,709 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 21:13:28,709 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 21:13:28,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:13:28" (1/1) ... [2021-03-10 21:13:28,722 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:13:28" (1/1) ... [2021-03-10 21:13:28,727 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 21:13:28,728 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 21:13:28,728 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 21:13:28,728 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 21:13:28,733 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:13:28" (1/1) ... [2021-03-10 21:13:28,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:13:28" (1/1) ... [2021-03-10 21:13:28,733 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:13:28" (1/1) ... [2021-03-10 21:13:28,734 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:13:28" (1/1) ... [2021-03-10 21:13:28,736 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:13:28" (1/1) ... [2021-03-10 21:13:28,738 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:13:28" (1/1) ... [2021-03-10 21:13:28,738 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:13:28" (1/1) ... [2021-03-10 21:13:28,739 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 21:13:28,739 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 21:13:28,739 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 21:13:28,740 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 21:13:28,741 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:13:28" (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 [2021-03-10 21:13:28,793 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-10 21:13:28,794 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-10 21:13:28,794 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-10 21:13:28,794 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-10 21:13:28,794 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-10 21:13:28,794 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-10 21:13:28,794 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 21:13:28,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 21:13:28,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 21:13:28,795 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 21:13:28,967 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 21:13:28,968 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-03-10 21:13:28,969 INFO L202 PluginConnector]: Adding new model fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 09:13:28 BoogieIcfgContainer [2021-03-10 21:13:28,969 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 21:13:28,970 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 21:13:28,970 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 21:13:28,972 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 21:13:28,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:13:28" (1/2) ... [2021-03-10 21:13:28,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@608f33d9 and model type fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 09:13:28, skipping insertion in model container [2021-03-10 21:13:28,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 09:13:28" (2/2) ... [2021-03-10 21:13:28,973 INFO L111 eAbstractionObserver]: Analyzing ICFG fibonacci.wvr.bpl [2021-03-10 21:13:28,976 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 21:13:28,977 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 21:13:28,991 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 21:13:28,992 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 21:13:29,027 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-03-10 21:13:29,040 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-10 21:13:29,057 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 21:13:29,057 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 21:13:29,057 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 21:13:29,058 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 21:13:29,058 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 21:13:29,058 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 21:13:29,058 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 21:13:29,058 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 21:13:29,063 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 24 places, 19 transitions, 54 flow [2021-03-10 21:13:29,071 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:29,073 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:29,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:13:29,076 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:29,077 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:29,077 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:29,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:29,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1266515445, now seen corresponding path program 1 times [2021-03-10 21:13:29,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:29,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824168672] [2021-03-10 21:13:29,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:29,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:29,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:29,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824168672] [2021-03-10 21:13:29,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:13:29,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 21:13:29,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74310012] [2021-03-10 21:13:29,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:13:29,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:29,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:13:29,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:13:29,312 INFO L87 Difference]: Start difference. First operand has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 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 5 states, 5 states have (on average 2.6) 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) [2021-03-10 21:13:29,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:29,363 INFO L93 Difference]: Finished difference Result 61 states and 108 transitions. [2021-03-10 21:13:29,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:13:29,364 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) 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 [2021-03-10 21:13:29,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:29,370 INFO L225 Difference]: With dead ends: 61 [2021-03-10 21:13:29,370 INFO L226 Difference]: Without dead ends: 54 [2021-03-10 21:13:29,371 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 56.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:13:29,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-03-10 21:13:29,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2021-03-10 21:13:29,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.975) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:29,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 79 transitions. [2021-03-10 21:13:29,393 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 79 transitions. Word has length 13 [2021-03-10 21:13:29,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:29,393 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 79 transitions. [2021-03-10 21:13:29,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) 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) [2021-03-10 21:13:29,393 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 79 transitions. [2021-03-10 21:13:29,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:13:29,394 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:29,394 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:29,394 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 21:13:29,394 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:29,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:29,395 INFO L82 PathProgramCache]: Analyzing trace with hash 861572483, now seen corresponding path program 2 times [2021-03-10 21:13:29,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:29,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735254601] [2021-03-10 21:13:29,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:29,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:29,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:29,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735254601] [2021-03-10 21:13:29,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:13:29,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 21:13:29,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29820546] [2021-03-10 21:13:29,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:13:29,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:29,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:13:29,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:13:29,485 INFO L87 Difference]: Start difference. First operand 41 states and 79 transitions. Second operand has 5 states, 5 states have (on average 2.6) 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) [2021-03-10 21:13:29,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:29,539 INFO L93 Difference]: Finished difference Result 52 states and 95 transitions. [2021-03-10 21:13:29,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:13:29,540 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) 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 [2021-03-10 21:13:29,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:29,540 INFO L225 Difference]: With dead ends: 52 [2021-03-10 21:13:29,540 INFO L226 Difference]: Without dead ends: 45 [2021-03-10 21:13:29,541 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 67.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:13:29,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-03-10 21:13:29,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-03-10 21:13:29,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:29,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 85 transitions. [2021-03-10 21:13:29,549 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 85 transitions. Word has length 13 [2021-03-10 21:13:29,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:29,549 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 85 transitions. [2021-03-10 21:13:29,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) 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) [2021-03-10 21:13:29,550 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 85 transitions. [2021-03-10 21:13:29,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:13:29,550 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:29,550 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:29,550 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 21:13:29,551 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:29,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:29,551 INFO L82 PathProgramCache]: Analyzing trace with hash -580645877, now seen corresponding path program 1 times [2021-03-10 21:13:29,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:29,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135468163] [2021-03-10 21:13:29,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:29,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:29,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:29,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135468163] [2021-03-10 21:13:29,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:13:29,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 21:13:29,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107228640] [2021-03-10 21:13:29,575 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:13:29,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:29,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:13:29,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:13:29,575 INFO L87 Difference]: Start difference. First operand 45 states and 85 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:29,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:29,615 INFO L93 Difference]: Finished difference Result 63 states and 114 transitions. [2021-03-10 21:13:29,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:13:29,616 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have 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 [2021-03-10 21:13:29,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:29,616 INFO L225 Difference]: With dead ends: 63 [2021-03-10 21:13:29,616 INFO L226 Difference]: Without dead ends: 55 [2021-03-10 21:13:29,617 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 23.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:13:29,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-03-10 21:13:29,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 40. [2021-03-10 21:13:29,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:29,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 75 transitions. [2021-03-10 21:13:29,620 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 75 transitions. Word has length 14 [2021-03-10 21:13:29,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:29,621 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 75 transitions. [2021-03-10 21:13:29,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:29,621 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 75 transitions. [2021-03-10 21:13:29,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:13:29,621 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:29,622 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:29,622 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-10 21:13:29,622 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:29,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:29,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1509805029, now seen corresponding path program 1 times [2021-03-10 21:13:29,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:29,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631143622] [2021-03-10 21:13:29,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:29,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:29,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:29,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631143622] [2021-03-10 21:13:29,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960185843] [2021-03-10 21:13:29,660 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 [2021-03-10 21:13:29,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:29,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-10 21:13:29,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:29,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:29,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:29,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-03-10 21:13:29,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763314142] [2021-03-10 21:13:29,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:13:29,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:29,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:13:29,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:13:29,764 INFO L87 Difference]: Start difference. First operand 40 states and 75 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:29,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:29,804 INFO L93 Difference]: Finished difference Result 59 states and 110 transitions. [2021-03-10 21:13:29,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:13:29,805 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:13:29,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:29,805 INFO L225 Difference]: With dead ends: 59 [2021-03-10 21:13:29,805 INFO L226 Difference]: Without dead ends: 59 [2021-03-10 21:13:29,806 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 27.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:13:29,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-03-10 21:13:29,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 41. [2021-03-10 21:13:29,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.95) internal successors, (78), 40 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:29,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 78 transitions. [2021-03-10 21:13:29,809 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 78 transitions. Word has length 14 [2021-03-10 21:13:29,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:29,809 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 78 transitions. [2021-03-10 21:13:29,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:29,809 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 78 transitions. [2021-03-10 21:13:29,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:13:29,810 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:29,810 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:30,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:30,028 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:30,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:30,029 INFO L82 PathProgramCache]: Analyzing trace with hash -709388465, now seen corresponding path program 2 times [2021-03-10 21:13:30,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:30,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797743448] [2021-03-10 21:13:30,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:30,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:30,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:30,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797743448] [2021-03-10 21:13:30,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:13:30,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 21:13:30,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892667107] [2021-03-10 21:13:30,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:13:30,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:30,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:13:30,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:13:30,070 INFO L87 Difference]: Start difference. First operand 41 states and 78 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:30,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:30,103 INFO L93 Difference]: Finished difference Result 80 states and 146 transitions. [2021-03-10 21:13:30,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:13:30,103 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have 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 [2021-03-10 21:13:30,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:30,107 INFO L225 Difference]: With dead ends: 80 [2021-03-10 21:13:30,107 INFO L226 Difference]: Without dead ends: 80 [2021-03-10 21:13:30,108 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:13:30,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-03-10 21:13:30,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 43. [2021-03-10 21:13:30,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:30,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 85 transitions. [2021-03-10 21:13:30,118 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 85 transitions. Word has length 14 [2021-03-10 21:13:30,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:30,118 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 85 transitions. [2021-03-10 21:13:30,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:30,118 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 85 transitions. [2021-03-10 21:13:30,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:13:30,119 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:30,119 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:30,119 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-10 21:13:30,119 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:30,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:30,119 INFO L82 PathProgramCache]: Analyzing trace with hash -137933659, now seen corresponding path program 3 times [2021-03-10 21:13:30,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:30,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48073477] [2021-03-10 21:13:30,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:30,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:30,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:30,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48073477] [2021-03-10 21:13:30,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:13:30,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 21:13:30,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635978985] [2021-03-10 21:13:30,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:13:30,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:30,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:13:30,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:13:30,172 INFO L87 Difference]: Start difference. First operand 43 states and 85 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:30,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:30,249 INFO L93 Difference]: Finished difference Result 77 states and 137 transitions. [2021-03-10 21:13:30,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:13:30,250 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have 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 [2021-03-10 21:13:30,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:30,251 INFO L225 Difference]: With dead ends: 77 [2021-03-10 21:13:30,251 INFO L226 Difference]: Without dead ends: 74 [2021-03-10 21:13:30,251 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:13:30,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-03-10 21:13:30,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 42. [2021-03-10 21:13:30,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:30,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 81 transitions. [2021-03-10 21:13:30,253 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 81 transitions. Word has length 14 [2021-03-10 21:13:30,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:30,253 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 81 transitions. [2021-03-10 21:13:30,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:30,253 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 81 transitions. [2021-03-10 21:13:30,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:13:30,254 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:30,255 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:30,256 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-10 21:13:30,256 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:30,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:30,257 INFO L82 PathProgramCache]: Analyzing trace with hash -2069505205, now seen corresponding path program 2 times [2021-03-10 21:13:30,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:30,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949188921] [2021-03-10 21:13:30,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:30,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:30,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:30,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949188921] [2021-03-10 21:13:30,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007492464] [2021-03-10 21:13:30,275 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 [2021-03-10 21:13:30,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:13:30,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:30,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-10 21:13:30,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:30,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:30,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:30,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-03-10 21:13:30,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835889517] [2021-03-10 21:13:30,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:13:30,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:30,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:13:30,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:13:30,360 INFO L87 Difference]: Start difference. First operand 42 states and 81 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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) [2021-03-10 21:13:30,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:30,389 INFO L93 Difference]: Finished difference Result 67 states and 123 transitions. [2021-03-10 21:13:30,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:13:30,390 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:13:30,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:30,390 INFO L225 Difference]: With dead ends: 67 [2021-03-10 21:13:30,390 INFO L226 Difference]: Without dead ends: 67 [2021-03-10 21:13:30,391 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.0ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:13:30,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-03-10 21:13:30,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 43. [2021-03-10 21:13:30,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.0) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:30,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 84 transitions. [2021-03-10 21:13:30,401 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 84 transitions. Word has length 14 [2021-03-10 21:13:30,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:30,401 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 84 transitions. [2021-03-10 21:13:30,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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) [2021-03-10 21:13:30,402 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 84 transitions. [2021-03-10 21:13:30,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:13:30,402 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:30,402 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:30,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:30,617 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:30,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:30,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1760870987, now seen corresponding path program 3 times [2021-03-10 21:13:30,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:30,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075664199] [2021-03-10 21:13:30,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:30,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:30,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:30,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075664199] [2021-03-10 21:13:30,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:13:30,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 21:13:30,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932019566] [2021-03-10 21:13:30,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:13:30,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:30,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:13:30,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:13:30,634 INFO L87 Difference]: Start difference. First operand 43 states and 84 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:30,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:30,666 INFO L93 Difference]: Finished difference Result 60 states and 108 transitions. [2021-03-10 21:13:30,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 21:13:30,666 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have 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 [2021-03-10 21:13:30,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:30,667 INFO L225 Difference]: With dead ends: 60 [2021-03-10 21:13:30,667 INFO L226 Difference]: Without dead ends: 58 [2021-03-10 21:13:30,667 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:13:30,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-03-10 21:13:30,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 43. [2021-03-10 21:13:30,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 42 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:30,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 83 transitions. [2021-03-10 21:13:30,669 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 83 transitions. Word has length 14 [2021-03-10 21:13:30,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:30,669 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 83 transitions. [2021-03-10 21:13:30,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:30,669 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 83 transitions. [2021-03-10 21:13:30,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:13:30,669 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:30,669 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:30,669 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-10 21:13:30,669 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:30,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:30,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1740461429, now seen corresponding path program 4 times [2021-03-10 21:13:30,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:30,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725364360] [2021-03-10 21:13:30,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:30,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:30,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:30,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725364360] [2021-03-10 21:13:30,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:13:30,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 21:13:30,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985077031] [2021-03-10 21:13:30,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:13:30,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:30,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:13:30,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:13:30,686 INFO L87 Difference]: Start difference. First operand 43 states and 83 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:30,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:30,711 INFO L93 Difference]: Finished difference Result 63 states and 119 transitions. [2021-03-10 21:13:30,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:13:30,711 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have 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 [2021-03-10 21:13:30,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:30,711 INFO L225 Difference]: With dead ends: 63 [2021-03-10 21:13:30,711 INFO L226 Difference]: Without dead ends: 63 [2021-03-10 21:13:30,711 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:13:30,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-03-10 21:13:30,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2021-03-10 21:13:30,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 2.0) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:30,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 80 transitions. [2021-03-10 21:13:30,713 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 80 transitions. Word has length 14 [2021-03-10 21:13:30,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:30,713 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 80 transitions. [2021-03-10 21:13:30,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:30,713 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 80 transitions. [2021-03-10 21:13:30,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:13:30,714 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:30,714 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:30,714 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-10 21:13:30,714 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:30,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:30,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1478794711, now seen corresponding path program 5 times [2021-03-10 21:13:30,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:30,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159052964] [2021-03-10 21:13:30,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:30,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:30,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:30,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159052964] [2021-03-10 21:13:30,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:13:30,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 21:13:30,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186559922] [2021-03-10 21:13:30,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:13:30,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:30,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:13:30,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:13:30,741 INFO L87 Difference]: Start difference. First operand 41 states and 80 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:30,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:30,779 INFO L93 Difference]: Finished difference Result 65 states and 121 transitions. [2021-03-10 21:13:30,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:13:30,779 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have 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 [2021-03-10 21:13:30,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:30,780 INFO L225 Difference]: With dead ends: 65 [2021-03-10 21:13:30,780 INFO L226 Difference]: Without dead ends: 65 [2021-03-10 21:13:30,780 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:13:30,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-03-10 21:13:30,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 41. [2021-03-10 21:13:30,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 2.0) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:30,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 80 transitions. [2021-03-10 21:13:30,783 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 80 transitions. Word has length 14 [2021-03-10 21:13:30,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:30,783 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 80 transitions. [2021-03-10 21:13:30,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:30,783 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 80 transitions. [2021-03-10 21:13:30,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:13:30,784 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:30,784 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:30,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-03-10 21:13:30,784 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:30,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:30,784 INFO L82 PathProgramCache]: Analyzing trace with hash 2050249517, now seen corresponding path program 6 times [2021-03-10 21:13:30,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:30,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111512770] [2021-03-10 21:13:30,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:30,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:30,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:30,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111512770] [2021-03-10 21:13:30,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:13:30,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 21:13:30,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647929780] [2021-03-10 21:13:30,809 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:13:30,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:30,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:13:30,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:13:30,809 INFO L87 Difference]: Start difference. First operand 41 states and 80 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:30,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:30,845 INFO L93 Difference]: Finished difference Result 58 states and 103 transitions. [2021-03-10 21:13:30,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 21:13:30,845 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have 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 [2021-03-10 21:13:30,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:30,846 INFO L225 Difference]: With dead ends: 58 [2021-03-10 21:13:30,846 INFO L226 Difference]: Without dead ends: 55 [2021-03-10 21:13:30,846 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:13:30,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-03-10 21:13:30,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 39. [2021-03-10 21:13:30,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:30,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 73 transitions. [2021-03-10 21:13:30,848 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 73 transitions. Word has length 14 [2021-03-10 21:13:30,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:30,848 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 73 transitions. [2021-03-10 21:13:30,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:30,848 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 73 transitions. [2021-03-10 21:13:30,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:13:30,848 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:30,848 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:30,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-03-10 21:13:30,848 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:30,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:30,849 INFO L82 PathProgramCache]: Analyzing trace with hash 118677971, now seen corresponding path program 4 times [2021-03-10 21:13:30,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:30,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720304511] [2021-03-10 21:13:30,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:30,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:30,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:30,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720304511] [2021-03-10 21:13:30,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358824747] [2021-03-10 21:13:30,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:30,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:13:30,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:30,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-10 21:13:30,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:30,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:30,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:30,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-03-10 21:13:30,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888282235] [2021-03-10 21:13:30,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:13:30,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:30,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:13:30,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:13:30,931 INFO L87 Difference]: Start difference. First operand 39 states and 73 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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) [2021-03-10 21:13:30,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:30,962 INFO L93 Difference]: Finished difference Result 60 states and 108 transitions. [2021-03-10 21:13:30,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:13:30,963 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:13:30,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:30,964 INFO L225 Difference]: With dead ends: 60 [2021-03-10 21:13:30,964 INFO L226 Difference]: Without dead ends: 60 [2021-03-10 21:13:30,964 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:13:30,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-03-10 21:13:30,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 41. [2021-03-10 21:13:30,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.975) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:30,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 79 transitions. [2021-03-10 21:13:30,965 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 79 transitions. Word has length 14 [2021-03-10 21:13:30,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:30,965 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 79 transitions. [2021-03-10 21:13:30,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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) [2021-03-10 21:13:30,965 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 79 transitions. [2021-03-10 21:13:30,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:13:30,966 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:30,966 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:31,171 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-03-10 21:13:31,172 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:31,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:31,172 INFO L82 PathProgramCache]: Analyzing trace with hash -345913133, now seen corresponding path program 5 times [2021-03-10 21:13:31,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:31,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897004855] [2021-03-10 21:13:31,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:31,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:31,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:31,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897004855] [2021-03-10 21:13:31,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:13:31,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 21:13:31,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496528436] [2021-03-10 21:13:31,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:13:31,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:31,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:13:31,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:13:31,207 INFO L87 Difference]: Start difference. First operand 41 states and 79 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:31,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:31,254 INFO L93 Difference]: Finished difference Result 74 states and 127 transitions. [2021-03-10 21:13:31,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:13:31,254 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have 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 [2021-03-10 21:13:31,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:31,254 INFO L225 Difference]: With dead ends: 74 [2021-03-10 21:13:31,254 INFO L226 Difference]: Without dead ends: 72 [2021-03-10 21:13:31,255 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 33.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:13:31,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-03-10 21:13:31,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 40. [2021-03-10 21:13:31,256 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) [2021-03-10 21:13:31,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 76 transitions. [2021-03-10 21:13:31,256 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 76 transitions. Word has length 14 [2021-03-10 21:13:31,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:31,256 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 76 transitions. [2021-03-10 21:13:31,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:31,256 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 76 transitions. [2021-03-10 21:13:31,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:13:31,256 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:31,257 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:31,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-03-10 21:13:31,257 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:31,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:31,257 INFO L82 PathProgramCache]: Analyzing trace with hash 36807255, now seen corresponding path program 6 times [2021-03-10 21:13:31,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:31,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329163589] [2021-03-10 21:13:31,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:31,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:31,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:31,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329163589] [2021-03-10 21:13:31,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:13:31,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 21:13:31,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563177163] [2021-03-10 21:13:31,271 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:13:31,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:31,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:13:31,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:13:31,271 INFO L87 Difference]: Start difference. First operand 40 states and 76 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:31,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:31,305 INFO L93 Difference]: Finished difference Result 44 states and 80 transitions. [2021-03-10 21:13:31,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:13:31,305 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have 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 [2021-03-10 21:13:31,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:31,305 INFO L225 Difference]: With dead ends: 44 [2021-03-10 21:13:31,305 INFO L226 Difference]: Without dead ends: 40 [2021-03-10 21:13:31,306 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 26.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:13:31,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-03-10 21:13:31,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-03-10 21:13:31,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:31,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 75 transitions. [2021-03-10 21:13:31,307 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 75 transitions. Word has length 14 [2021-03-10 21:13:31,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:31,307 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 75 transitions. [2021-03-10 21:13:31,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:31,307 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 75 transitions. [2021-03-10 21:13:31,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:13:31,307 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:31,307 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:31,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-03-10 21:13:31,307 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:31,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:31,308 INFO L82 PathProgramCache]: Analyzing trace with hash 467311611, now seen corresponding path program 1 times [2021-03-10 21:13:31,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:31,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480569618] [2021-03-10 21:13:31,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:31,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:31,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:31,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480569618] [2021-03-10 21:13:31,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049985929] [2021-03-10 21:13:31,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:13:31,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:31,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:13:31,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:31,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:31,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:31,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-03-10 21:13:31,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647644246] [2021-03-10 21:13:31,458 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:13:31,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:31,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:13:31,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:13:31,458 INFO L87 Difference]: Start difference. First operand 40 states and 75 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 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) [2021-03-10 21:13:31,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:31,507 INFO L93 Difference]: Finished difference Result 61 states and 113 transitions. [2021-03-10 21:13:31,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:13:31,507 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 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 [2021-03-10 21:13:31,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:31,508 INFO L225 Difference]: With dead ends: 61 [2021-03-10 21:13:31,508 INFO L226 Difference]: Without dead ends: 54 [2021-03-10 21:13:31,508 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 70.0ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:13:31,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-03-10 21:13:31,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2021-03-10 21:13:31,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.94) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:31,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 97 transitions. [2021-03-10 21:13:31,509 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 97 transitions. Word has length 15 [2021-03-10 21:13:31,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:31,509 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 97 transitions. [2021-03-10 21:13:31,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 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) [2021-03-10 21:13:31,509 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 97 transitions. [2021-03-10 21:13:31,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:13:31,510 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:31,510 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:31,727 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:31,727 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:31,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:31,728 INFO L82 PathProgramCache]: Analyzing trace with hash 338569023, now seen corresponding path program 2 times [2021-03-10 21:13:31,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:31,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268806470] [2021-03-10 21:13:31,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:31,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:31,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:31,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268806470] [2021-03-10 21:13:31,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845726656] [2021-03-10 21:13:31,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:31,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:13:31,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:31,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:13:31,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:31,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:31,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:31,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-03-10 21:13:31,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814601715] [2021-03-10 21:13:31,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:13:31,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:31,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:13:31,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:13:31,948 INFO L87 Difference]: Start difference. First operand 51 states and 97 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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) [2021-03-10 21:13:31,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:31,999 INFO L93 Difference]: Finished difference Result 76 states and 137 transitions. [2021-03-10 21:13:31,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:13:31,999 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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 [2021-03-10 21:13:31,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:31,999 INFO L225 Difference]: With dead ends: 76 [2021-03-10 21:13:31,999 INFO L226 Difference]: Without dead ends: 69 [2021-03-10 21:13:32,000 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 94.8ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:13:32,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-03-10 21:13:32,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2021-03-10 21:13:32,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 51 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:32,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 101 transitions. [2021-03-10 21:13:32,001 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 101 transitions. Word has length 15 [2021-03-10 21:13:32,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:32,001 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 101 transitions. [2021-03-10 21:13:32,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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) [2021-03-10 21:13:32,001 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 101 transitions. [2021-03-10 21:13:32,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:13:32,002 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:32,002 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:32,211 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-03-10 21:13:32,211 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:32,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:32,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1953271747, now seen corresponding path program 3 times [2021-03-10 21:13:32,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:32,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955431003] [2021-03-10 21:13:32,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:32,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:32,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:32,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955431003] [2021-03-10 21:13:32,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060355123] [2021-03-10 21:13:32,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:32,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:13:32,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:32,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:13:32,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:32,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:32,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:32,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-03-10 21:13:32,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378185697] [2021-03-10 21:13:32,358 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:13:32,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:32,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:13:32,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:13:32,359 INFO L87 Difference]: Start difference. First operand 52 states and 101 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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) [2021-03-10 21:13:32,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:32,410 INFO L93 Difference]: Finished difference Result 64 states and 119 transitions. [2021-03-10 21:13:32,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:13:32,410 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 [2021-03-10 21:13:32,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:32,412 INFO L225 Difference]: With dead ends: 64 [2021-03-10 21:13:32,412 INFO L226 Difference]: Without dead ends: 57 [2021-03-10 21:13:32,412 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 86.7ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:13:32,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-03-10 21:13:32,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2021-03-10 21:13:32,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 51 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:32,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 101 transitions. [2021-03-10 21:13:32,415 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 101 transitions. Word has length 15 [2021-03-10 21:13:32,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:32,415 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 101 transitions. [2021-03-10 21:13:32,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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) [2021-03-10 21:13:32,415 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 101 transitions. [2021-03-10 21:13:32,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:13:32,415 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:32,415 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:32,633 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:32,633 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:32,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:32,634 INFO L82 PathProgramCache]: Analyzing trace with hash -713510149, now seen corresponding path program 4 times [2021-03-10 21:13:32,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:32,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485792168] [2021-03-10 21:13:32,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:32,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:32,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:32,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485792168] [2021-03-10 21:13:32,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563673829] [2021-03-10 21:13:32,697 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:32,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:13:32,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:32,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:13:32,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:32,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:32,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:32,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-03-10 21:13:32,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623620428] [2021-03-10 21:13:32,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:13:32,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:32,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:13:32,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:13:32,793 INFO L87 Difference]: Start difference. First operand 52 states and 101 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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) [2021-03-10 21:13:32,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:32,847 INFO L93 Difference]: Finished difference Result 80 states and 148 transitions. [2021-03-10 21:13:32,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:13:32,847 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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 [2021-03-10 21:13:32,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:32,847 INFO L225 Difference]: With dead ends: 80 [2021-03-10 21:13:32,847 INFO L226 Difference]: Without dead ends: 73 [2021-03-10 21:13:32,847 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 78.9ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:13:32,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-03-10 21:13:32,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 55. [2021-03-10 21:13:32,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 54 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:32,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 111 transitions. [2021-03-10 21:13:32,850 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 111 transitions. Word has length 15 [2021-03-10 21:13:32,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:32,850 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 111 transitions. [2021-03-10 21:13:32,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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) [2021-03-10 21:13:32,850 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 111 transitions. [2021-03-10 21:13:32,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:13:32,852 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:32,852 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:33,071 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:33,071 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:33,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:33,071 INFO L82 PathProgramCache]: Analyzing trace with hash 901192575, now seen corresponding path program 5 times [2021-03-10 21:13:33,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:33,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157852285] [2021-03-10 21:13:33,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:33,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:33,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:33,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157852285] [2021-03-10 21:13:33,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081230791] [2021-03-10 21:13:33,135 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:33,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:13:33,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:33,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:13:33,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:33,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:33,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:33,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-03-10 21:13:33,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303603013] [2021-03-10 21:13:33,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:13:33,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:33,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:13:33,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:13:33,258 INFO L87 Difference]: Start difference. First operand 55 states and 111 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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) [2021-03-10 21:13:33,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:33,317 INFO L93 Difference]: Finished difference Result 82 states and 150 transitions. [2021-03-10 21:13:33,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:13:33,317 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 [2021-03-10 21:13:33,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:33,319 INFO L225 Difference]: With dead ends: 82 [2021-03-10 21:13:33,320 INFO L226 Difference]: Without dead ends: 75 [2021-03-10 21:13:33,320 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 106.7ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:13:33,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-03-10 21:13:33,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2021-03-10 21:13:33,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.018867924528302) internal successors, (107), 53 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:33,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 107 transitions. [2021-03-10 21:13:33,324 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 107 transitions. Word has length 15 [2021-03-10 21:13:33,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:33,324 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 107 transitions. [2021-03-10 21:13:33,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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) [2021-03-10 21:13:33,324 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 107 transitions. [2021-03-10 21:13:33,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:13:33,324 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:33,324 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:33,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-03-10 21:13:33,531 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:33,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:33,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1178101253, now seen corresponding path program 6 times [2021-03-10 21:13:33,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:33,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246513864] [2021-03-10 21:13:33,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:33,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:33,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:33,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246513864] [2021-03-10 21:13:33,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119675284] [2021-03-10 21:13:33,588 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:33,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:13:33,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:33,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:13:33,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:33,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:33,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:33,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-03-10 21:13:33,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833554582] [2021-03-10 21:13:33,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:13:33,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:33,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:13:33,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:13:33,687 INFO L87 Difference]: Start difference. First operand 54 states and 107 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 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) [2021-03-10 21:13:33,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:33,738 INFO L93 Difference]: Finished difference Result 67 states and 126 transitions. [2021-03-10 21:13:33,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:13:33,738 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:13:33,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:33,738 INFO L225 Difference]: With dead ends: 67 [2021-03-10 21:13:33,738 INFO L226 Difference]: Without dead ends: 60 [2021-03-10 21:13:33,739 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 68.3ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:13:33,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-03-10 21:13:33,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2021-03-10 21:13:33,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 57 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:33,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 113 transitions. [2021-03-10 21:13:33,740 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 113 transitions. Word has length 15 [2021-03-10 21:13:33,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:33,740 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 113 transitions. [2021-03-10 21:13:33,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 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) [2021-03-10 21:13:33,740 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 113 transitions. [2021-03-10 21:13:33,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:13:33,740 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:33,741 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:33,950 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:33,950 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:33,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:33,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1628385307, now seen corresponding path program 7 times [2021-03-10 21:13:33,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:33,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437879094] [2021-03-10 21:13:33,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:33,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:33,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:33,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437879094] [2021-03-10 21:13:33,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125545994] [2021-03-10 21:13:33,988 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:34,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:34,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:13:34,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:34,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:34,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:34,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 21:13:34,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040345137] [2021-03-10 21:13:34,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:13:34,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:34,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:13:34,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:13:34,063 INFO L87 Difference]: Start difference. First operand 58 states and 113 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) [2021-03-10 21:13:34,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:34,116 INFO L93 Difference]: Finished difference Result 84 states and 155 transitions. [2021-03-10 21:13:34,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:13:34,116 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 16 [2021-03-10 21:13:34,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:34,117 INFO L225 Difference]: With dead ends: 84 [2021-03-10 21:13:34,117 INFO L226 Difference]: Without dead ends: 73 [2021-03-10 21:13:34,117 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 50.7ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:13:34,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-03-10 21:13:34,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2021-03-10 21:13:34,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 52 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:34,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 103 transitions. [2021-03-10 21:13:34,118 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 103 transitions. Word has length 16 [2021-03-10 21:13:34,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:34,118 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 103 transitions. [2021-03-10 21:13:34,118 INFO L481 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) [2021-03-10 21:13:34,118 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 103 transitions. [2021-03-10 21:13:34,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:13:34,120 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:34,120 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:34,335 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:34,335 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:34,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:34,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1405744629, now seen corresponding path program 8 times [2021-03-10 21:13:34,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:34,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583088104] [2021-03-10 21:13:34,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:34,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:34,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:34,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583088104] [2021-03-10 21:13:34,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83384902] [2021-03-10 21:13:34,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:34,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:13:34,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:34,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:13:34,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:34,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:34,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:34,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 21:13:34,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619997636] [2021-03-10 21:13:34,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:13:34,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:34,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:13:34,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:13:34,433 INFO L87 Difference]: Start difference. First operand 53 states and 103 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) [2021-03-10 21:13:34,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:34,476 INFO L93 Difference]: Finished difference Result 81 states and 154 transitions. [2021-03-10 21:13:34,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:13:34,476 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 16 [2021-03-10 21:13:34,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:34,477 INFO L225 Difference]: With dead ends: 81 [2021-03-10 21:13:34,477 INFO L226 Difference]: Without dead ends: 81 [2021-03-10 21:13:34,477 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 36.5ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:13:34,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-03-10 21:13:34,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 54. [2021-03-10 21:13:34,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.0) internal successors, (106), 53 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:34,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 106 transitions. [2021-03-10 21:13:34,478 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 106 transitions. Word has length 16 [2021-03-10 21:13:34,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:34,478 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 106 transitions. [2021-03-10 21:13:34,478 INFO L481 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) [2021-03-10 21:13:34,478 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 106 transitions. [2021-03-10 21:13:34,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:13:34,479 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:34,479 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:34,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-03-10 21:13:34,688 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:34,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:34,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1226449649, now seen corresponding path program 9 times [2021-03-10 21:13:34,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:34,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611842474] [2021-03-10 21:13:34,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:34,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:34,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:34,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611842474] [2021-03-10 21:13:34,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058884940] [2021-03-10 21:13:34,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:34,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:13:34,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:34,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:13:34,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:34,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:34,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:34,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:13:34,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381795867] [2021-03-10 21:13:34,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:13:34,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:34,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:13:34,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:13:34,795 INFO L87 Difference]: Start difference. First operand 54 states and 106 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) [2021-03-10 21:13:34,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:34,883 INFO L93 Difference]: Finished difference Result 154 states and 282 transitions. [2021-03-10 21:13:34,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:13:34,883 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 [2021-03-10 21:13:34,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:34,885 INFO L225 Difference]: With dead ends: 154 [2021-03-10 21:13:34,885 INFO L226 Difference]: Without dead ends: 154 [2021-03-10 21:13:34,885 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 60.1ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:13:34,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-03-10 21:13:34,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 62. [2021-03-10 21:13:34,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.1639344262295084) internal successors, (132), 61 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:34,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 132 transitions. [2021-03-10 21:13:34,888 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 132 transitions. Word has length 16 [2021-03-10 21:13:34,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:34,888 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 132 transitions. [2021-03-10 21:13:34,888 INFO L481 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) [2021-03-10 21:13:34,888 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 132 transitions. [2021-03-10 21:13:34,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:13:34,889 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:34,889 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:35,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-03-10 21:13:35,103 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:35,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:35,103 INFO L82 PathProgramCache]: Analyzing trace with hash -654994843, now seen corresponding path program 10 times [2021-03-10 21:13:35,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:35,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644378194] [2021-03-10 21:13:35,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:35,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:35,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:35,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644378194] [2021-03-10 21:13:35,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012914412] [2021-03-10 21:13:35,127 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:35,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:13:35,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:35,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:13:35,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:35,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:35,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:35,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:13:35,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203232734] [2021-03-10 21:13:35,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:13:35,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:35,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:13:35,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:13:35,187 INFO L87 Difference]: Start difference. First operand 62 states and 132 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) [2021-03-10 21:13:35,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:35,331 INFO L93 Difference]: Finished difference Result 157 states and 283 transitions. [2021-03-10 21:13:35,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:13:35,331 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 [2021-03-10 21:13:35,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:35,333 INFO L225 Difference]: With dead ends: 157 [2021-03-10 21:13:35,333 INFO L226 Difference]: Without dead ends: 154 [2021-03-10 21:13:35,333 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 97.8ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:13:35,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-03-10 21:13:35,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 63. [2021-03-10 21:13:35,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.096774193548387) internal successors, (130), 62 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:35,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 130 transitions. [2021-03-10 21:13:35,336 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 130 transitions. Word has length 16 [2021-03-10 21:13:35,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:35,336 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 130 transitions. [2021-03-10 21:13:35,336 INFO L481 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) [2021-03-10 21:13:35,336 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 130 transitions. [2021-03-10 21:13:35,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:13:35,336 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:35,336 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:35,551 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-03-10 21:13:35,551 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:35,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:35,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1708400907, now seen corresponding path program 11 times [2021-03-10 21:13:35,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:35,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968761593] [2021-03-10 21:13:35,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:35,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:35,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:35,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968761593] [2021-03-10 21:13:35,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410473124] [2021-03-10 21:13:35,576 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:13:35,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:13:35,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:35,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:13:35,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:35,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:35,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:35,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:13:35,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080701135] [2021-03-10 21:13:35,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:13:35,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:35,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:13:35,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:13:35,650 INFO L87 Difference]: Start difference. First operand 63 states and 130 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:35,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:35,723 INFO L93 Difference]: Finished difference Result 160 states and 307 transitions. [2021-03-10 21:13:35,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:13:35,723 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 [2021-03-10 21:13:35,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:35,725 INFO L225 Difference]: With dead ends: 160 [2021-03-10 21:13:35,725 INFO L226 Difference]: Without dead ends: 160 [2021-03-10 21:13:35,726 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 58.3ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:13:35,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-03-10 21:13:35,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 70. [2021-03-10 21:13:35,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.217391304347826) internal successors, (153), 69 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) [2021-03-10 21:13:35,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 153 transitions. [2021-03-10 21:13:35,730 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 153 transitions. Word has length 16 [2021-03-10 21:13:35,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:35,730 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 153 transitions. [2021-03-10 21:13:35,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:35,731 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 153 transitions. [2021-03-10 21:13:35,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:13:35,731 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:35,731 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:35,939 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:35,939 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:35,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:35,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1243809803, now seen corresponding path program 12 times [2021-03-10 21:13:35,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:35,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434708275] [2021-03-10 21:13:35,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:35,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:35,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:35,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434708275] [2021-03-10 21:13:35,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715701725] [2021-03-10 21:13:35,961 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:35,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:13:35,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:35,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:13:35,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:36,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:36,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:36,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:13:36,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298401933] [2021-03-10 21:13:36,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:13:36,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:36,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:13:36,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:13:36,047 INFO L87 Difference]: Start difference. First operand 70 states and 153 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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) [2021-03-10 21:13:36,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:36,153 INFO L93 Difference]: Finished difference Result 114 states and 223 transitions. [2021-03-10 21:13:36,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:13:36,155 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:13:36,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:36,155 INFO L225 Difference]: With dead ends: 114 [2021-03-10 21:13:36,155 INFO L226 Difference]: Without dead ends: 110 [2021-03-10 21:13:36,156 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 87.7ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:13:36,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-03-10 21:13:36,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 72. [2021-03-10 21:13:36,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.183098591549296) internal successors, (155), 71 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) [2021-03-10 21:13:36,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 155 transitions. [2021-03-10 21:13:36,165 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 155 transitions. Word has length 16 [2021-03-10 21:13:36,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:36,165 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 155 transitions. [2021-03-10 21:13:36,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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) [2021-03-10 21:13:36,165 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 155 transitions. [2021-03-10 21:13:36,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:13:36,166 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:36,166 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:36,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-03-10 21:13:36,371 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:36,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:36,371 INFO L82 PathProgramCache]: Analyzing trace with hash -119765041, now seen corresponding path program 13 times [2021-03-10 21:13:36,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:36,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68644745] [2021-03-10 21:13:36,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:36,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:36,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:36,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68644745] [2021-03-10 21:13:36,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662849616] [2021-03-10 21:13:36,391 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:36,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:36,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:13:36,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:36,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:36,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:36,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:13:36,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395116264] [2021-03-10 21:13:36,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:13:36,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:36,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:13:36,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:13:36,453 INFO L87 Difference]: Start difference. First operand 72 states and 155 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) [2021-03-10 21:13:36,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:36,545 INFO L93 Difference]: Finished difference Result 132 states and 247 transitions. [2021-03-10 21:13:36,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:13:36,551 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 [2021-03-10 21:13:36,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:36,553 INFO L225 Difference]: With dead ends: 132 [2021-03-10 21:13:36,553 INFO L226 Difference]: Without dead ends: 126 [2021-03-10 21:13:36,553 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 81.2ms TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:13:36,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-03-10 21:13:36,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 72. [2021-03-10 21:13:36,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.1549295774647885) internal successors, (153), 71 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) [2021-03-10 21:13:36,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 153 transitions. [2021-03-10 21:13:36,560 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 153 transitions. Word has length 16 [2021-03-10 21:13:36,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:36,560 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 153 transitions. [2021-03-10 21:13:36,560 INFO L481 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) [2021-03-10 21:13:36,560 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 153 transitions. [2021-03-10 21:13:36,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:13:36,560 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:36,560 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:36,779 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-03-10 21:13:36,779 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:36,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:36,780 INFO L82 PathProgramCache]: Analyzing trace with hash -841282353, now seen corresponding path program 14 times [2021-03-10 21:13:36,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:36,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725307713] [2021-03-10 21:13:36,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:36,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:36,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:36,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725307713] [2021-03-10 21:13:36,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34648953] [2021-03-10 21:13:36,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:36,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:13:36,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:36,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:13:36,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:36,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:36,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:36,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-03-10 21:13:36,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137332996] [2021-03-10 21:13:36,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:13:36,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:36,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:13:36,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:13:36,888 INFO L87 Difference]: Start difference. First operand 72 states and 153 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 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) [2021-03-10 21:13:36,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:36,985 INFO L93 Difference]: Finished difference Result 186 states and 367 transitions. [2021-03-10 21:13:36,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:13:36,986 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:13:36,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:36,986 INFO L225 Difference]: With dead ends: 186 [2021-03-10 21:13:36,986 INFO L226 Difference]: Without dead ends: 186 [2021-03-10 21:13:36,987 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 70.9ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:13:36,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-03-10 21:13:36,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 84. [2021-03-10 21:13:36,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.3132530120481927) internal successors, (192), 83 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:36,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 192 transitions. [2021-03-10 21:13:36,989 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 192 transitions. Word has length 16 [2021-03-10 21:13:36,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:36,989 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 192 transitions. [2021-03-10 21:13:36,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 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) [2021-03-10 21:13:36,989 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 192 transitions. [2021-03-10 21:13:36,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:13:36,989 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:36,989 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:37,195 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-03-10 21:13:37,195 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:37,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:37,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1305873457, now seen corresponding path program 15 times [2021-03-10 21:13:37,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:37,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279578844] [2021-03-10 21:13:37,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:37,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:37,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:37,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279578844] [2021-03-10 21:13:37,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612705151] [2021-03-10 21:13:37,215 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 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 [2021-03-10 21:13:37,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:13:37,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:37,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:13:37,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:37,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:37,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:37,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-03-10 21:13:37,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621565566] [2021-03-10 21:13:37,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:13:37,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:37,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:13:37,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:13:37,300 INFO L87 Difference]: Start difference. First operand 84 states and 192 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:37,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:37,442 INFO L93 Difference]: Finished difference Result 157 states and 310 transitions. [2021-03-10 21:13:37,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:13:37,443 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:13:37,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:37,443 INFO L225 Difference]: With dead ends: 157 [2021-03-10 21:13:37,443 INFO L226 Difference]: Without dead ends: 155 [2021-03-10 21:13:37,444 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 113.7ms TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:13:37,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-03-10 21:13:37,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 84. [2021-03-10 21:13:37,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.3012048192771086) internal successors, (191), 83 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:37,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 191 transitions. [2021-03-10 21:13:37,446 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 191 transitions. Word has length 16 [2021-03-10 21:13:37,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:37,446 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 191 transitions. [2021-03-10 21:13:37,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:37,446 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 191 transitions. [2021-03-10 21:13:37,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:13:37,446 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:37,446 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:37,662 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-03-10 21:13:37,663 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:37,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:37,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1339472685, now seen corresponding path program 16 times [2021-03-10 21:13:37,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:37,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872265540] [2021-03-10 21:13:37,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:37,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:37,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:37,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872265540] [2021-03-10 21:13:37,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735906622] [2021-03-10 21:13:37,688 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:37,716 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:13:37,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:37,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:13:37,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:37,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:37,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:37,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:13:37,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605679080] [2021-03-10 21:13:37,767 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:13:37,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:37,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:13:37,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:13:37,767 INFO L87 Difference]: Start difference. First operand 84 states and 191 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) [2021-03-10 21:13:37,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:37,900 INFO L93 Difference]: Finished difference Result 146 states and 304 transitions. [2021-03-10 21:13:37,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:13:37,900 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:13:37,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:37,901 INFO L225 Difference]: With dead ends: 146 [2021-03-10 21:13:37,901 INFO L226 Difference]: Without dead ends: 142 [2021-03-10 21:13:37,901 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 118.8ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:13:37,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-03-10 21:13:37,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 94. [2021-03-10 21:13:37,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.3655913978494625) internal successors, (220), 93 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) [2021-03-10 21:13:37,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 220 transitions. [2021-03-10 21:13:37,903 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 220 transitions. Word has length 16 [2021-03-10 21:13:37,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:37,904 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 220 transitions. [2021-03-10 21:13:37,904 INFO L481 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) [2021-03-10 21:13:37,904 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 220 transitions. [2021-03-10 21:13:37,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:13:37,904 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:37,904 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:38,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:38,107 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:38,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:38,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1363701933, now seen corresponding path program 17 times [2021-03-10 21:13:38,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:38,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651445863] [2021-03-10 21:13:38,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:38,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:38,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:38,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651445863] [2021-03-10 21:13:38,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857365504] [2021-03-10 21:13:38,128 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:38,143 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:13:38,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:38,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:13:38,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:38,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:38,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:38,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 21:13:38,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713134769] [2021-03-10 21:13:38,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:13:38,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:38,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:13:38,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:13:38,194 INFO L87 Difference]: Start difference. First operand 94 states and 220 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) [2021-03-10 21:13:38,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:38,248 INFO L93 Difference]: Finished difference Result 128 states and 284 transitions. [2021-03-10 21:13:38,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:13:38,248 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 16 [2021-03-10 21:13:38,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:38,249 INFO L225 Difference]: With dead ends: 128 [2021-03-10 21:13:38,249 INFO L226 Difference]: Without dead ends: 128 [2021-03-10 21:13:38,249 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 40.3ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:13:38,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-03-10 21:13:38,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 93. [2021-03-10 21:13:38,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.391304347826087) internal successors, (220), 92 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) [2021-03-10 21:13:38,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 220 transitions. [2021-03-10 21:13:38,252 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 220 transitions. Word has length 16 [2021-03-10 21:13:38,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:38,252 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 220 transitions. [2021-03-10 21:13:38,252 INFO L481 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) [2021-03-10 21:13:38,252 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 220 transitions. [2021-03-10 21:13:38,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:13:38,252 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:38,252 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:38,467 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-03-10 21:13:38,467 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:38,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:38,468 INFO L82 PathProgramCache]: Analyzing trace with hash -351009401, now seen corresponding path program 18 times [2021-03-10 21:13:38,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:38,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508318672] [2021-03-10 21:13:38,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:38,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:38,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:38,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508318672] [2021-03-10 21:13:38,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704359120] [2021-03-10 21:13:38,492 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 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 [2021-03-10 21:13:38,516 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:13:38,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:38,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:13:38,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:38,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:38,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:38,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:13:38,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275619939] [2021-03-10 21:13:38,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:13:38,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:38,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:13:38,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:13:38,561 INFO L87 Difference]: Start difference. First operand 93 states and 220 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) [2021-03-10 21:13:38,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:38,650 INFO L93 Difference]: Finished difference Result 128 states and 288 transitions. [2021-03-10 21:13:38,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:13:38,650 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 [2021-03-10 21:13:38,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:38,650 INFO L225 Difference]: With dead ends: 128 [2021-03-10 21:13:38,650 INFO L226 Difference]: Without dead ends: 128 [2021-03-10 21:13:38,651 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 64.9ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:13:38,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-03-10 21:13:38,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 98. [2021-03-10 21:13:38,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.422680412371134) internal successors, (235), 97 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) [2021-03-10 21:13:38,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 235 transitions. [2021-03-10 21:13:38,653 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 235 transitions. Word has length 16 [2021-03-10 21:13:38,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:38,653 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 235 transitions. [2021-03-10 21:13:38,653 INFO L481 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) [2021-03-10 21:13:38,653 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 235 transitions. [2021-03-10 21:13:38,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:13:38,653 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:38,653 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:38,867 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-03-10 21:13:38,868 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:38,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:38,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1795161359, now seen corresponding path program 19 times [2021-03-10 21:13:38,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:38,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287511500] [2021-03-10 21:13:38,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:38,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:38,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:38,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287511500] [2021-03-10 21:13:38,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966940827] [2021-03-10 21:13:38,889 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:38,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:38,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:13:38,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:38,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:38,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:38,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:13:38,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352094752] [2021-03-10 21:13:38,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:13:38,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:38,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:13:38,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:13:38,953 INFO L87 Difference]: Start difference. First operand 98 states and 235 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) [2021-03-10 21:13:39,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:39,043 INFO L93 Difference]: Finished difference Result 175 states and 369 transitions. [2021-03-10 21:13:39,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:13:39,043 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 [2021-03-10 21:13:39,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:39,044 INFO L225 Difference]: With dead ends: 175 [2021-03-10 21:13:39,044 INFO L226 Difference]: Without dead ends: 175 [2021-03-10 21:13:39,044 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 61.5ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:13:39,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-03-10 21:13:39,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 101. [2021-03-10 21:13:39,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.46) internal successors, (246), 100 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:39,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 246 transitions. [2021-03-10 21:13:39,046 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 246 transitions. Word has length 16 [2021-03-10 21:13:39,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:39,046 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 246 transitions. [2021-03-10 21:13:39,046 INFO L481 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) [2021-03-10 21:13:39,046 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 246 transitions. [2021-03-10 21:13:39,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:13:39,047 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:39,047 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:39,261 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:39,261 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:39,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:39,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1928351131, now seen corresponding path program 20 times [2021-03-10 21:13:39,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:39,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988872035] [2021-03-10 21:13:39,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:39,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:39,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:39,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988872035] [2021-03-10 21:13:39,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528661664] [2021-03-10 21:13:39,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:39,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:13:39,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:39,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:13:39,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:39,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:39,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:39,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:13:39,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952490590] [2021-03-10 21:13:39,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:13:39,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:39,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:13:39,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:13:39,340 INFO L87 Difference]: Start difference. First operand 101 states and 246 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) [2021-03-10 21:13:39,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:39,454 INFO L93 Difference]: Finished difference Result 143 states and 309 transitions. [2021-03-10 21:13:39,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:13:39,455 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 [2021-03-10 21:13:39,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:39,455 INFO L225 Difference]: With dead ends: 143 [2021-03-10 21:13:39,455 INFO L226 Difference]: Without dead ends: 137 [2021-03-10 21:13:39,456 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 94.1ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:13:39,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-03-10 21:13:39,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 98. [2021-03-10 21:13:39,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.4329896907216493) internal successors, (236), 97 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) [2021-03-10 21:13:39,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 236 transitions. [2021-03-10 21:13:39,458 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 236 transitions. Word has length 16 [2021-03-10 21:13:39,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:39,458 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 236 transitions. [2021-03-10 21:13:39,458 INFO L481 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) [2021-03-10 21:13:39,458 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 236 transitions. [2021-03-10 21:13:39,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:13:39,458 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:39,458 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:39,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-03-10 21:13:39,671 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:39,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:39,671 INFO L82 PathProgramCache]: Analyzing trace with hash 435044619, now seen corresponding path program 21 times [2021-03-10 21:13:39,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:39,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903870643] [2021-03-10 21:13:39,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:39,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:39,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:39,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903870643] [2021-03-10 21:13:39,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166524572] [2021-03-10 21:13:39,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:39,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:13:39,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:39,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:13:39,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:39,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:39,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:39,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:13:39,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332956875] [2021-03-10 21:13:39,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:13:39,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:39,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:13:39,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:13:39,763 INFO L87 Difference]: Start difference. First operand 98 states and 236 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:39,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:39,843 INFO L93 Difference]: Finished difference Result 189 states and 398 transitions. [2021-03-10 21:13:39,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:13:39,844 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 [2021-03-10 21:13:39,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:39,845 INFO L225 Difference]: With dead ends: 189 [2021-03-10 21:13:39,845 INFO L226 Difference]: Without dead ends: 189 [2021-03-10 21:13:39,845 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 61.1ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:13:39,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-03-10 21:13:39,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 106. [2021-03-10 21:13:39,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.5047619047619047) internal successors, (263), 105 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) [2021-03-10 21:13:39,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 263 transitions. [2021-03-10 21:13:39,848 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 263 transitions. Word has length 16 [2021-03-10 21:13:39,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:39,848 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 263 transitions. [2021-03-10 21:13:39,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:39,848 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 263 transitions. [2021-03-10 21:13:39,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:13:39,848 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:39,848 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:40,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:40,063 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:40,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:40,064 INFO L82 PathProgramCache]: Analyzing trace with hash -29546485, now seen corresponding path program 22 times [2021-03-10 21:13:40,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:40,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222483485] [2021-03-10 21:13:40,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:40,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:40,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:40,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222483485] [2021-03-10 21:13:40,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981916203] [2021-03-10 21:13:40,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:40,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:13:40,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:40,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:13:40,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:40,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:40,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:40,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:13:40,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614586932] [2021-03-10 21:13:40,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:13:40,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:40,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:13:40,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:13:40,141 INFO L87 Difference]: Start difference. First operand 106 states and 263 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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) [2021-03-10 21:13:40,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:40,251 INFO L93 Difference]: Finished difference Result 179 states and 382 transitions. [2021-03-10 21:13:40,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:13:40,252 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:13:40,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:40,252 INFO L225 Difference]: With dead ends: 179 [2021-03-10 21:13:40,252 INFO L226 Difference]: Without dead ends: 177 [2021-03-10 21:13:40,253 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 86.8ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:13:40,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-03-10 21:13:40,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 101. [2021-03-10 21:13:40,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.44) internal successors, (244), 100 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:40,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 244 transitions. [2021-03-10 21:13:40,255 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 244 transitions. Word has length 16 [2021-03-10 21:13:40,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:40,255 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 244 transitions. [2021-03-10 21:13:40,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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) [2021-03-10 21:13:40,255 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 244 transitions. [2021-03-10 21:13:40,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:13:40,256 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:40,256 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:40,467 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-03-10 21:13:40,468 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:40,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:40,468 INFO L82 PathProgramCache]: Analyzing trace with hash -63145713, now seen corresponding path program 23 times [2021-03-10 21:13:40,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:40,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518425644] [2021-03-10 21:13:40,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:40,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:40,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:40,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518425644] [2021-03-10 21:13:40,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553552666] [2021-03-10 21:13:40,492 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:40,507 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:13:40,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:40,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:13:40,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:40,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:40,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:40,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:13:40,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165653] [2021-03-10 21:13:40,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:13:40,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:40,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:13:40,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:13:40,546 INFO L87 Difference]: Start difference. First operand 101 states and 244 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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) [2021-03-10 21:13:40,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:40,647 INFO L93 Difference]: Finished difference Result 150 states and 322 transitions. [2021-03-10 21:13:40,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:13:40,647 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:13:40,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:40,648 INFO L225 Difference]: With dead ends: 150 [2021-03-10 21:13:40,648 INFO L226 Difference]: Without dead ends: 146 [2021-03-10 21:13:40,648 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 90.9ms TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:13:40,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-03-10 21:13:40,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 101. [2021-03-10 21:13:40,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.42) internal successors, (242), 100 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:40,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 242 transitions. [2021-03-10 21:13:40,650 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 242 transitions. Word has length 16 [2021-03-10 21:13:40,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:40,650 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 242 transitions. [2021-03-10 21:13:40,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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) [2021-03-10 21:13:40,650 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 242 transitions. [2021-03-10 21:13:40,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:13:40,651 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:40,651 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:40,855 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-03-10 21:13:40,855 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:40,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:40,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1083715573, now seen corresponding path program 24 times [2021-03-10 21:13:40,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:40,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543615841] [2021-03-10 21:13:40,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:40,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:40,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:40,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543615841] [2021-03-10 21:13:40,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475560693] [2021-03-10 21:13:40,879 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:40,894 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:13:40,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:40,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:13:40,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:40,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:40,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:40,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 21:13:40,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448794392] [2021-03-10 21:13:40,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:13:40,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:40,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:13:40,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:13:40,938 INFO L87 Difference]: Start difference. First operand 101 states and 242 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) [2021-03-10 21:13:40,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:40,985 INFO L93 Difference]: Finished difference Result 114 states and 266 transitions. [2021-03-10 21:13:40,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:13:40,986 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 16 [2021-03-10 21:13:40,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:40,986 INFO L225 Difference]: With dead ends: 114 [2021-03-10 21:13:40,986 INFO L226 Difference]: Without dead ends: 108 [2021-03-10 21:13:40,986 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 49.5ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:13:40,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-03-10 21:13:40,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 101. [2021-03-10 21:13:40,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.41) internal successors, (241), 100 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) [2021-03-10 21:13:40,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 241 transitions. [2021-03-10 21:13:40,989 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 241 transitions. Word has length 16 [2021-03-10 21:13:40,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:40,989 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 241 transitions. [2021-03-10 21:13:40,989 INFO L481 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) [2021-03-10 21:13:40,989 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 241 transitions. [2021-03-10 21:13:40,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:13:40,990 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:40,990 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:41,203 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-03-10 21:13:41,203 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:41,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:41,203 INFO L82 PathProgramCache]: Analyzing trace with hash 977688019, now seen corresponding path program 25 times [2021-03-10 21:13:41,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:41,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866061092] [2021-03-10 21:13:41,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:41,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:41,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:41,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866061092] [2021-03-10 21:13:41,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428258610] [2021-03-10 21:13:41,223 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:13:41,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:41,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:13:41,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:41,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:41,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:41,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:13:41,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869692471] [2021-03-10 21:13:41,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:13:41,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:41,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:13:41,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:13:41,288 INFO L87 Difference]: Start difference. First operand 101 states and 241 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) [2021-03-10 21:13:41,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:41,403 INFO L93 Difference]: Finished difference Result 167 states and 364 transitions. [2021-03-10 21:13:41,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:13:41,404 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:13:41,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:41,404 INFO L225 Difference]: With dead ends: 167 [2021-03-10 21:13:41,404 INFO L226 Difference]: Without dead ends: 167 [2021-03-10 21:13:41,405 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 85.9ms TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:13:41,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-03-10 21:13:41,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 104. [2021-03-10 21:13:41,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.436893203883495) internal successors, (251), 103 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) [2021-03-10 21:13:41,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 251 transitions. [2021-03-10 21:13:41,407 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 251 transitions. Word has length 16 [2021-03-10 21:13:41,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:41,407 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 251 transitions. [2021-03-10 21:13:41,407 INFO L481 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) [2021-03-10 21:13:41,407 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 251 transitions. [2021-03-10 21:13:41,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:13:41,408 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:41,408 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:41,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:41,615 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:41,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:41,615 INFO L82 PathProgramCache]: Analyzing trace with hash 935675603, now seen corresponding path program 26 times [2021-03-10 21:13:41,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:41,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262538771] [2021-03-10 21:13:41,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:41,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:41,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:41,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262538771] [2021-03-10 21:13:41,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227991157] [2021-03-10 21:13:41,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:41,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:13:41,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:41,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:13:41,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:41,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:41,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:41,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-03-10 21:13:41,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913376018] [2021-03-10 21:13:41,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:13:41,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:41,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:13:41,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:13:41,692 INFO L87 Difference]: Start difference. First operand 104 states and 251 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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) [2021-03-10 21:13:41,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:41,769 INFO L93 Difference]: Finished difference Result 217 states and 462 transitions. [2021-03-10 21:13:41,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:13:41,769 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:13:41,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:41,770 INFO L225 Difference]: With dead ends: 217 [2021-03-10 21:13:41,770 INFO L226 Difference]: Without dead ends: 217 [2021-03-10 21:13:41,770 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 64.1ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:13:41,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-03-10 21:13:41,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 115. [2021-03-10 21:13:41,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.526315789473684) internal successors, (288), 114 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:41,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2021-03-10 21:13:41,773 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 16 [2021-03-10 21:13:41,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:41,773 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2021-03-10 21:13:41,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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) [2021-03-10 21:13:41,773 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2021-03-10 21:13:41,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:13:41,773 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:41,773 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:41,987 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-03-10 21:13:41,987 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:41,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:41,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1507130409, now seen corresponding path program 27 times [2021-03-10 21:13:41,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:41,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128747056] [2021-03-10 21:13:41,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:41,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:42,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:42,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128747056] [2021-03-10 21:13:42,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801198713] [2021-03-10 21:13:42,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:13:42,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:13:42,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:42,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:13:42,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:42,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:42,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:42,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-03-10 21:13:42,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675232265] [2021-03-10 21:13:42,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:13:42,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:42,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:13:42,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:13:42,072 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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) [2021-03-10 21:13:42,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:42,201 INFO L93 Difference]: Finished difference Result 201 states and 430 transitions. [2021-03-10 21:13:42,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:13:42,201 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:13:42,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:42,202 INFO L225 Difference]: With dead ends: 201 [2021-03-10 21:13:42,202 INFO L226 Difference]: Without dead ends: 198 [2021-03-10 21:13:42,202 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 109.5ms TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:13:42,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-03-10 21:13:42,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 109. [2021-03-10 21:13:42,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.4537037037037037) internal successors, (265), 108 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) [2021-03-10 21:13:42,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 265 transitions. [2021-03-10 21:13:42,205 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 265 transitions. Word has length 16 [2021-03-10 21:13:42,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:42,205 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 265 transitions. [2021-03-10 21:13:42,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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) [2021-03-10 21:13:42,206 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 265 transitions. [2021-03-10 21:13:42,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:13:42,206 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:42,206 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:42,411 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:42,411 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:42,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:42,411 INFO L82 PathProgramCache]: Analyzing trace with hash 2042360211, now seen corresponding path program 28 times [2021-03-10 21:13:42,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:42,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922009966] [2021-03-10 21:13:42,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:42,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:42,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:42,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922009966] [2021-03-10 21:13:42,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838569794] [2021-03-10 21:13:42,434 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:42,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:13:42,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:42,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:13:42,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:42,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:42,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:42,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:13:42,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666476483] [2021-03-10 21:13:42,496 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:13:42,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:42,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:13:42,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:13:42,496 INFO L87 Difference]: Start difference. First operand 109 states and 265 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) [2021-03-10 21:13:42,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:42,640 INFO L93 Difference]: Finished difference Result 183 states and 400 transitions. [2021-03-10 21:13:42,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:13:42,640 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:13:42,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:42,641 INFO L225 Difference]: With dead ends: 183 [2021-03-10 21:13:42,641 INFO L226 Difference]: Without dead ends: 177 [2021-03-10 21:13:42,641 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 103.7ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:13:42,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-03-10 21:13:42,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 122. [2021-03-10 21:13:42,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.4958677685950414) internal successors, (302), 121 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) [2021-03-10 21:13:42,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 302 transitions. [2021-03-10 21:13:42,643 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 302 transitions. Word has length 16 [2021-03-10 21:13:42,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:42,643 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 302 transitions. [2021-03-10 21:13:42,643 INFO L481 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) [2021-03-10 21:13:42,643 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 302 transitions. [2021-03-10 21:13:42,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:13:42,644 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:42,644 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:42,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:42,844 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:42,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:42,845 INFO L82 PathProgramCache]: Analyzing trace with hash -601783285, now seen corresponding path program 29 times [2021-03-10 21:13:42,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:42,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405773687] [2021-03-10 21:13:42,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:42,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:42,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:42,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405773687] [2021-03-10 21:13:42,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57869848] [2021-03-10 21:13:42,906 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:42,921 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:13:42,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:42,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 21:13:42,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:43,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:43,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:43,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-03-10 21:13:43,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415715738] [2021-03-10 21:13:43,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:13:43,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:43,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:13:43,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:13:43,004 INFO L87 Difference]: Start difference. First operand 122 states and 302 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:43,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:43,145 INFO L93 Difference]: Finished difference Result 223 states and 473 transitions. [2021-03-10 21:13:43,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:13:43,146 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 [2021-03-10 21:13:43,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:43,146 INFO L225 Difference]: With dead ends: 223 [2021-03-10 21:13:43,146 INFO L226 Difference]: Without dead ends: 203 [2021-03-10 21:13:43,146 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 131.7ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:13:43,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-03-10 21:13:43,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 142. [2021-03-10 21:13:43,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.475177304964539) internal successors, (349), 141 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) [2021-03-10 21:13:43,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 349 transitions. [2021-03-10 21:13:43,149 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 349 transitions. Word has length 17 [2021-03-10 21:13:43,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:43,149 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 349 transitions. [2021-03-10 21:13:43,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:43,149 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 349 transitions. [2021-03-10 21:13:43,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:13:43,150 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:43,150 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:43,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-03-10 21:13:43,364 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:43,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:43,365 INFO L82 PathProgramCache]: Analyzing trace with hash 838349055, now seen corresponding path program 30 times [2021-03-10 21:13:43,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:43,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674001709] [2021-03-10 21:13:43,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:43,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:43,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:43,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674001709] [2021-03-10 21:13:43,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33706297] [2021-03-10 21:13:43,456 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:43,472 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:13:43,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:43,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 21:13:43,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:43,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:43,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:43,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-10 21:13:43,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926487163] [2021-03-10 21:13:43,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:13:43,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:43,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:13:43,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:13:43,543 INFO L87 Difference]: Start difference. First operand 142 states and 349 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 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) [2021-03-10 21:13:43,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:43,652 INFO L93 Difference]: Finished difference Result 253 states and 530 transitions. [2021-03-10 21:13:43,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:13:43,653 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 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 [2021-03-10 21:13:43,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:43,654 INFO L225 Difference]: With dead ends: 253 [2021-03-10 21:13:43,654 INFO L226 Difference]: Without dead ends: 246 [2021-03-10 21:13:43,654 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 132.0ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:13:43,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-03-10 21:13:43,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 149. [2021-03-10 21:13:43,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.527027027027027) internal successors, (374), 148 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:43,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 374 transitions. [2021-03-10 21:13:43,657 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 374 transitions. Word has length 17 [2021-03-10 21:13:43,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:43,657 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 374 transitions. [2021-03-10 21:13:43,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 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) [2021-03-10 21:13:43,657 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 374 transitions. [2021-03-10 21:13:43,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:13:43,658 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:43,658 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:43,871 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-03-10 21:13:43,871 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:43,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:43,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1841915517, now seen corresponding path program 31 times [2021-03-10 21:13:43,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:43,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485215236] [2021-03-10 21:13:43,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:43,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:43,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:43,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485215236] [2021-03-10 21:13:43,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977126593] [2021-03-10 21:13:43,958 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:13:43,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:43,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 21:13:43,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:44,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:44,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:44,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-10 21:13:44,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911710063] [2021-03-10 21:13:44,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:13:44,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:44,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:13:44,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:13:44,060 INFO L87 Difference]: Start difference. First operand 149 states and 374 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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) [2021-03-10 21:13:44,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:44,197 INFO L93 Difference]: Finished difference Result 239 states and 510 transitions. [2021-03-10 21:13:44,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:13:44,197 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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 [2021-03-10 21:13:44,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:44,198 INFO L225 Difference]: With dead ends: 239 [2021-03-10 21:13:44,198 INFO L226 Difference]: Without dead ends: 223 [2021-03-10 21:13:44,199 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 157.1ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:13:44,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-03-10 21:13:44,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 148. [2021-03-10 21:13:44,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.5238095238095237) internal successors, (371), 147 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) [2021-03-10 21:13:44,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 371 transitions. [2021-03-10 21:13:44,202 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 371 transitions. Word has length 17 [2021-03-10 21:13:44,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:44,202 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 371 transitions. [2021-03-10 21:13:44,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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) [2021-03-10 21:13:44,202 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 371 transitions. [2021-03-10 21:13:44,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:13:44,202 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:44,202 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:44,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-03-10 21:13:44,418 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:44,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:44,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1409803861, now seen corresponding path program 32 times [2021-03-10 21:13:44,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:44,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248005273] [2021-03-10 21:13:44,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:44,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:44,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:44,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248005273] [2021-03-10 21:13:44,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968808750] [2021-03-10 21:13:44,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:44,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:13:44,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:44,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 21:13:44,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:44,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:44,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:44,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-03-10 21:13:44,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553851885] [2021-03-10 21:13:44,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:13:44,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:44,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:13:44,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:13:44,575 INFO L87 Difference]: Start difference. First operand 148 states and 371 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:44,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:44,693 INFO L93 Difference]: Finished difference Result 224 states and 484 transitions. [2021-03-10 21:13:44,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:13:44,694 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 [2021-03-10 21:13:44,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:44,694 INFO L225 Difference]: With dead ends: 224 [2021-03-10 21:13:44,694 INFO L226 Difference]: Without dead ends: 217 [2021-03-10 21:13:44,695 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 117.6ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:13:44,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-03-10 21:13:44,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 148. [2021-03-10 21:13:44,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.5238095238095237) internal successors, (371), 147 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) [2021-03-10 21:13:44,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 371 transitions. [2021-03-10 21:13:44,697 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 371 transitions. Word has length 17 [2021-03-10 21:13:44,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:44,697 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 371 transitions. [2021-03-10 21:13:44,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:44,698 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 371 transitions. [2021-03-10 21:13:44,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:13:44,698 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:44,698 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:44,911 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:44,911 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:44,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:44,911 INFO L82 PathProgramCache]: Analyzing trace with hash 437462331, now seen corresponding path program 33 times [2021-03-10 21:13:44,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:44,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822449851] [2021-03-10 21:13:44,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:44,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:44,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:44,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822449851] [2021-03-10 21:13:44,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569556869] [2021-03-10 21:13:44,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:45,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:13:45,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:45,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 21:13:45,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:45,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:45,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:45,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-03-10 21:13:45,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315917218] [2021-03-10 21:13:45,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:13:45,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:45,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:13:45,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:13:45,075 INFO L87 Difference]: Start difference. First operand 148 states and 371 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 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) [2021-03-10 21:13:45,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:45,169 INFO L93 Difference]: Finished difference Result 218 states and 492 transitions. [2021-03-10 21:13:45,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:13:45,170 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 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 [2021-03-10 21:13:45,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:45,171 INFO L225 Difference]: With dead ends: 218 [2021-03-10 21:13:45,171 INFO L226 Difference]: Without dead ends: 211 [2021-03-10 21:13:45,171 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 101.0ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:13:45,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-03-10 21:13:45,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 157. [2021-03-10 21:13:45,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.551282051282051) internal successors, (398), 156 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:45,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 398 transitions. [2021-03-10 21:13:45,175 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 398 transitions. Word has length 17 [2021-03-10 21:13:45,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:45,175 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 398 transitions. [2021-03-10 21:13:45,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 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) [2021-03-10 21:13:45,176 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 398 transitions. [2021-03-10 21:13:45,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:13:45,176 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:45,176 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:45,390 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-03-10 21:13:45,391 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:45,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:45,391 INFO L82 PathProgramCache]: Analyzing trace with hash 2052165055, now seen corresponding path program 34 times [2021-03-10 21:13:45,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:45,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143666802] [2021-03-10 21:13:45,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:45,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:45,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:45,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143666802] [2021-03-10 21:13:45,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390314878] [2021-03-10 21:13:45,447 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 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 [2021-03-10 21:13:45,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:13:45,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:45,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 21:13:45,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:45,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:45,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:45,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-03-10 21:13:45,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320265433] [2021-03-10 21:13:45,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:13:45,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:45,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:13:45,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:13:45,528 INFO L87 Difference]: Start difference. First operand 157 states and 398 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 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) [2021-03-10 21:13:45,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:45,621 INFO L93 Difference]: Finished difference Result 220 states and 491 transitions. [2021-03-10 21:13:45,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:13:45,621 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 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 [2021-03-10 21:13:45,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:45,622 INFO L225 Difference]: With dead ends: 220 [2021-03-10 21:13:45,622 INFO L226 Difference]: Without dead ends: 211 [2021-03-10 21:13:45,622 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 102.7ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:13:45,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-03-10 21:13:45,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 156. [2021-03-10 21:13:45,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.535483870967742) internal successors, (393), 155 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) [2021-03-10 21:13:45,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 393 transitions. [2021-03-10 21:13:45,625 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 393 transitions. Word has length 17 [2021-03-10 21:13:45,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:45,625 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 393 transitions. [2021-03-10 21:13:45,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 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) [2021-03-10 21:13:45,625 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 393 transitions. [2021-03-10 21:13:45,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:13:45,625 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:45,625 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:45,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-03-10 21:13:45,826 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:45,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:45,826 INFO L82 PathProgramCache]: Analyzing trace with hash -27128773, now seen corresponding path program 35 times [2021-03-10 21:13:45,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:45,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881879013] [2021-03-10 21:13:45,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:45,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:45,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:45,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881879013] [2021-03-10 21:13:45,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638508655] [2021-03-10 21:13:45,889 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:45,905 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:13:45,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:45,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 21:13:45,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:45,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:45,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:45,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-03-10 21:13:45,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226463944] [2021-03-10 21:13:45,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:13:45,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:45,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:13:45,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:13:45,980 INFO L87 Difference]: Start difference. First operand 156 states and 393 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 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) [2021-03-10 21:13:46,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:46,079 INFO L93 Difference]: Finished difference Result 203 states and 463 transitions. [2021-03-10 21:13:46,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:13:46,080 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 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 [2021-03-10 21:13:46,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:46,080 INFO L225 Difference]: With dead ends: 203 [2021-03-10 21:13:46,080 INFO L226 Difference]: Without dead ends: 196 [2021-03-10 21:13:46,081 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 107.6ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:13:46,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-03-10 21:13:46,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 156. [2021-03-10 21:13:46,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.535483870967742) internal successors, (393), 155 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) [2021-03-10 21:13:46,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 393 transitions. [2021-03-10 21:13:46,084 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 393 transitions. Word has length 17 [2021-03-10 21:13:46,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:46,084 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 393 transitions. [2021-03-10 21:13:46,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 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) [2021-03-10 21:13:46,084 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 393 transitions. [2021-03-10 21:13:46,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:13:46,084 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:46,084 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:46,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:46,299 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:46,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:46,299 INFO L82 PathProgramCache]: Analyzing trace with hash 894875775, now seen corresponding path program 36 times [2021-03-10 21:13:46,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:46,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178790069] [2021-03-10 21:13:46,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:46,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:46,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:46,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178790069] [2021-03-10 21:13:46,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23153454] [2021-03-10 21:13:46,362 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:46,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:13:46,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:46,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 21:13:46,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:46,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:46,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:46,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-10 21:13:46,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369699849] [2021-03-10 21:13:46,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:13:46,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:46,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:13:46,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:13:46,437 INFO L87 Difference]: Start difference. First operand 156 states and 393 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 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) [2021-03-10 21:13:46,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:46,588 INFO L93 Difference]: Finished difference Result 276 states and 609 transitions. [2021-03-10 21:13:46,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:13:46,588 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 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 [2021-03-10 21:13:46,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:46,589 INFO L225 Difference]: With dead ends: 276 [2021-03-10 21:13:46,589 INFO L226 Difference]: Without dead ends: 259 [2021-03-10 21:13:46,590 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 147.8ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:13:46,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-03-10 21:13:46,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 173. [2021-03-10 21:13:46,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.604651162790698) internal successors, (448), 172 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:46,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 448 transitions. [2021-03-10 21:13:46,593 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 448 transitions. Word has length 17 [2021-03-10 21:13:46,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:46,593 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 448 transitions. [2021-03-10 21:13:46,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 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) [2021-03-10 21:13:46,593 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 448 transitions. [2021-03-10 21:13:46,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:13:46,594 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:46,594 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:46,807 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:46,807 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:46,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:46,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1785388797, now seen corresponding path program 37 times [2021-03-10 21:13:46,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:46,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294417101] [2021-03-10 21:13:46,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:46,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:46,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:46,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294417101] [2021-03-10 21:13:46,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289449644] [2021-03-10 21:13:46,878 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 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 [2021-03-10 21:13:46,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:46,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 21:13:46,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:46,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:46,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:46,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-10 21:13:46,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843631859] [2021-03-10 21:13:46,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:13:46,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:46,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:13:46,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:13:46,966 INFO L87 Difference]: Start difference. First operand 173 states and 448 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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) [2021-03-10 21:13:47,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:47,089 INFO L93 Difference]: Finished difference Result 277 states and 604 transitions. [2021-03-10 21:13:47,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:13:47,089 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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 [2021-03-10 21:13:47,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:47,090 INFO L225 Difference]: With dead ends: 277 [2021-03-10 21:13:47,090 INFO L226 Difference]: Without dead ends: 261 [2021-03-10 21:13:47,090 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 138.5ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:13:47,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-03-10 21:13:47,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 170. [2021-03-10 21:13:47,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.57396449704142) internal successors, (435), 169 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:47,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 435 transitions. [2021-03-10 21:13:47,093 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 435 transitions. Word has length 17 [2021-03-10 21:13:47,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:47,093 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 435 transitions. [2021-03-10 21:13:47,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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) [2021-03-10 21:13:47,094 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 435 transitions. [2021-03-10 21:13:47,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:13:47,094 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:47,094 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:47,309 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:47,310 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:47,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:47,310 INFO L82 PathProgramCache]: Analyzing trace with hash 430284671, now seen corresponding path program 38 times [2021-03-10 21:13:47,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:47,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760688377] [2021-03-10 21:13:47,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:47,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:47,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:47,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760688377] [2021-03-10 21:13:47,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012106510] [2021-03-10 21:13:47,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:47,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:13:47,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:47,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 21:13:47,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:47,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:47,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:47,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-03-10 21:13:47,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510977516] [2021-03-10 21:13:47,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:13:47,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:47,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:13:47,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:13:47,461 INFO L87 Difference]: Start difference. First operand 170 states and 435 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 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) [2021-03-10 21:13:47,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:47,617 INFO L93 Difference]: Finished difference Result 262 states and 576 transitions. [2021-03-10 21:13:47,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:13:47,617 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 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 [2021-03-10 21:13:47,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:47,618 INFO L225 Difference]: With dead ends: 262 [2021-03-10 21:13:47,618 INFO L226 Difference]: Without dead ends: 244 [2021-03-10 21:13:47,618 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 129.9ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:13:47,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-03-10 21:13:47,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 169. [2021-03-10 21:13:47,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.5773809523809526) internal successors, (433), 168 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) [2021-03-10 21:13:47,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 433 transitions. [2021-03-10 21:13:47,621 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 433 transitions. Word has length 17 [2021-03-10 21:13:47,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:47,621 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 433 transitions. [2021-03-10 21:13:47,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 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) [2021-03-10 21:13:47,621 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 433 transitions. [2021-03-10 21:13:47,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:13:47,621 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:47,621 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:47,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:47,836 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:47,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:47,837 INFO L82 PathProgramCache]: Analyzing trace with hash 396685443, now seen corresponding path program 39 times [2021-03-10 21:13:47,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:47,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633052923] [2021-03-10 21:13:47,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:47,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:47,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:47,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633052923] [2021-03-10 21:13:47,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039070389] [2021-03-10 21:13:47,900 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 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 [2021-03-10 21:13:47,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:13:47,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:47,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 21:13:47,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:47,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:47,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:47,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-03-10 21:13:47,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731954840] [2021-03-10 21:13:47,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:13:47,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:47,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:13:47,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:13:47,995 INFO L87 Difference]: Start difference. First operand 169 states and 433 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 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) [2021-03-10 21:13:48,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:48,112 INFO L93 Difference]: Finished difference Result 233 states and 528 transitions. [2021-03-10 21:13:48,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:13:48,112 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 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 [2021-03-10 21:13:48,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:48,113 INFO L225 Difference]: With dead ends: 233 [2021-03-10 21:13:48,113 INFO L226 Difference]: Without dead ends: 226 [2021-03-10 21:13:48,113 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 117.5ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:13:48,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-03-10 21:13:48,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 175. [2021-03-10 21:13:48,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.5402298850574714) internal successors, (442), 174 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) [2021-03-10 21:13:48,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 442 transitions. [2021-03-10 21:13:48,116 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 442 transitions. Word has length 17 [2021-03-10 21:13:48,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:48,116 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 442 transitions. [2021-03-10 21:13:48,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 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) [2021-03-10 21:13:48,116 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 442 transitions. [2021-03-10 21:13:48,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:13:48,117 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:48,117 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:48,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:48,332 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:48,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:48,332 INFO L82 PathProgramCache]: Analyzing trace with hash 852863359, now seen corresponding path program 40 times [2021-03-10 21:13:48,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:48,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332777039] [2021-03-10 21:13:48,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:48,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:48,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:48,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332777039] [2021-03-10 21:13:48,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837485042] [2021-03-10 21:13:48,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:13:48,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:13:48,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:48,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 21:13:48,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:48,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:48,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:48,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-03-10 21:13:48,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405296391] [2021-03-10 21:13:48,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:13:48,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:48,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:13:48,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:13:48,497 INFO L87 Difference]: Start difference. First operand 175 states and 442 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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) [2021-03-10 21:13:48,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:48,610 INFO L93 Difference]: Finished difference Result 259 states and 585 transitions. [2021-03-10 21:13:48,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:13:48,610 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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 [2021-03-10 21:13:48,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:48,611 INFO L225 Difference]: With dead ends: 259 [2021-03-10 21:13:48,611 INFO L226 Difference]: Without dead ends: 249 [2021-03-10 21:13:48,611 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 153.5ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:13:48,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-03-10 21:13:48,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 182. [2021-03-10 21:13:48,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.569060773480663) internal successors, (465), 181 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) [2021-03-10 21:13:48,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 465 transitions. [2021-03-10 21:13:48,614 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 465 transitions. Word has length 17 [2021-03-10 21:13:48,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:48,614 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 465 transitions. [2021-03-10 21:13:48,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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) [2021-03-10 21:13:48,614 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 465 transitions. [2021-03-10 21:13:48,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:13:48,614 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:48,614 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:48,827 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:48,827 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:48,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:48,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1827401213, now seen corresponding path program 41 times [2021-03-10 21:13:48,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:48,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605969729] [2021-03-10 21:13:48,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:48,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:48,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:48,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605969729] [2021-03-10 21:13:48,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441659884] [2021-03-10 21:13:48,889 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:13:48,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:13:48,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:48,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 21:13:48,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:48,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:48,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:48,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-03-10 21:13:48,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123985506] [2021-03-10 21:13:48,968 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:13:48,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:48,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:13:48,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:13:48,969 INFO L87 Difference]: Start difference. First operand 182 states and 465 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:49,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:49,053 INFO L93 Difference]: Finished difference Result 247 states and 565 transitions. [2021-03-10 21:13:49,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:13:49,053 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have 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 [2021-03-10 21:13:49,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:49,054 INFO L225 Difference]: With dead ends: 247 [2021-03-10 21:13:49,054 INFO L226 Difference]: Without dead ends: 240 [2021-03-10 21:13:49,054 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 107.5ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:13:49,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-03-10 21:13:49,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 183. [2021-03-10 21:13:49,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.5494505494505493) internal successors, (464), 182 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) [2021-03-10 21:13:49,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 464 transitions. [2021-03-10 21:13:49,057 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 464 transitions. Word has length 17 [2021-03-10 21:13:49,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:49,057 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 464 transitions. [2021-03-10 21:13:49,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:49,057 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 464 transitions. [2021-03-10 21:13:49,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:13:49,057 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:49,057 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:49,271 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:49,271 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:49,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:49,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1424318165, now seen corresponding path program 42 times [2021-03-10 21:13:49,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:49,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72634855] [2021-03-10 21:13:49,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:49,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:49,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:49,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72634855] [2021-03-10 21:13:49,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905301667] [2021-03-10 21:13:49,329 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:49,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:13:49,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:49,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 21:13:49,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:49,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:49,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:49,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-03-10 21:13:49,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629401987] [2021-03-10 21:13:49,418 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:13:49,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:49,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:13:49,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:13:49,419 INFO L87 Difference]: Start difference. First operand 183 states and 464 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 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) [2021-03-10 21:13:49,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:49,505 INFO L93 Difference]: Finished difference Result 231 states and 537 transitions. [2021-03-10 21:13:49,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:13:49,505 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 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 [2021-03-10 21:13:49,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:49,506 INFO L225 Difference]: With dead ends: 231 [2021-03-10 21:13:49,506 INFO L226 Difference]: Without dead ends: 224 [2021-03-10 21:13:49,506 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 103.0ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:13:49,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-03-10 21:13:49,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 182. [2021-03-10 21:13:49,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.546961325966851) internal successors, (461), 181 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) [2021-03-10 21:13:49,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 461 transitions. [2021-03-10 21:13:49,509 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 461 transitions. Word has length 17 [2021-03-10 21:13:49,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:49,509 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 461 transitions. [2021-03-10 21:13:49,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 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) [2021-03-10 21:13:49,509 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 461 transitions. [2021-03-10 21:13:49,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:13:49,509 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:49,509 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:49,723 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:49,723 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:49,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:49,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1448785397, now seen corresponding path program 43 times [2021-03-10 21:13:49,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:49,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85218705] [2021-03-10 21:13:49,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:49,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:49,751 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:49,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85218705] [2021-03-10 21:13:49,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066974631] [2021-03-10 21:13:49,752 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:49,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:49,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:13:49,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:49,825 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:49,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:49,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 21:13:49,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585058856] [2021-03-10 21:13:49,826 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:13:49,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:49,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:13:49,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:13:49,826 INFO L87 Difference]: Start difference. First operand 182 states and 461 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:49,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:49,920 INFO L93 Difference]: Finished difference Result 295 states and 722 transitions. [2021-03-10 21:13:49,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:13:49,920 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:13:49,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:49,921 INFO L225 Difference]: With dead ends: 295 [2021-03-10 21:13:49,921 INFO L226 Difference]: Without dead ends: 281 [2021-03-10 21:13:49,921 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 80.2ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:13:49,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-03-10 21:13:49,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 177. [2021-03-10 21:13:49,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.5625) internal successors, (451), 176 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) [2021-03-10 21:13:49,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 451 transitions. [2021-03-10 21:13:49,924 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 451 transitions. Word has length 18 [2021-03-10 21:13:49,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:49,924 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 451 transitions. [2021-03-10 21:13:49,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:49,925 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 451 transitions. [2021-03-10 21:13:49,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:13:49,925 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:49,925 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:50,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-03-10 21:13:50,139 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:50,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:50,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1017532901, now seen corresponding path program 44 times [2021-03-10 21:13:50,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:50,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442420720] [2021-03-10 21:13:50,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:50,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:50,165 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:50,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442420720] [2021-03-10 21:13:50,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591446168] [2021-03-10 21:13:50,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:50,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:13:50,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:50,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:13:50,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:50,229 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:50,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:50,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 21:13:50,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89184226] [2021-03-10 21:13:50,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:13:50,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:50,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:13:50,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:13:50,230 INFO L87 Difference]: Start difference. First operand 177 states and 451 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:50,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:50,295 INFO L93 Difference]: Finished difference Result 302 states and 747 transitions. [2021-03-10 21:13:50,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:13:50,295 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:13:50,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:50,296 INFO L225 Difference]: With dead ends: 302 [2021-03-10 21:13:50,296 INFO L226 Difference]: Without dead ends: 302 [2021-03-10 21:13:50,296 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 54.3ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:13:50,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-03-10 21:13:50,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 183. [2021-03-10 21:13:50,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.576923076923077) internal successors, (469), 182 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:50,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 469 transitions. [2021-03-10 21:13:50,299 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 469 transitions. Word has length 18 [2021-03-10 21:13:50,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:50,299 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 469 transitions. [2021-03-10 21:13:50,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:50,299 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 469 transitions. [2021-03-10 21:13:50,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:13:50,299 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:50,299 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:50,514 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:50,514 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:50,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:50,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1381829455, now seen corresponding path program 45 times [2021-03-10 21:13:50,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:50,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902339367] [2021-03-10 21:13:50,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:50,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:50,548 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:50,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902339367] [2021-03-10 21:13:50,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008414015] [2021-03-10 21:13:50,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:13:50,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:13:50,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:50,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:13:50,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:50,621 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:50,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:50,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 21:13:50,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114847562] [2021-03-10 21:13:50,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:13:50,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:50,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:13:50,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:13:50,622 INFO L87 Difference]: Start difference. First operand 183 states and 469 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) [2021-03-10 21:13:50,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:50,811 INFO L93 Difference]: Finished difference Result 476 states and 1093 transitions. [2021-03-10 21:13:50,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:13:50,811 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 18 [2021-03-10 21:13:50,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:50,812 INFO L225 Difference]: With dead ends: 476 [2021-03-10 21:13:50,812 INFO L226 Difference]: Without dead ends: 474 [2021-03-10 21:13:50,813 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 151.9ms TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:13:50,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-03-10 21:13:50,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 222. [2021-03-10 21:13:50,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.746606334841629) internal successors, (607), 221 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:50,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 607 transitions. [2021-03-10 21:13:50,816 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 607 transitions. Word has length 18 [2021-03-10 21:13:50,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:50,817 INFO L480 AbstractCegarLoop]: Abstraction has 222 states and 607 transitions. [2021-03-10 21:13:50,817 INFO L481 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) [2021-03-10 21:13:50,817 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 607 transitions. [2021-03-10 21:13:50,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:13:50,817 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:50,817 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:51,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-03-10 21:13:51,033 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:51,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:51,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1953284261, now seen corresponding path program 46 times [2021-03-10 21:13:51,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:51,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131001430] [2021-03-10 21:13:51,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:51,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:51,064 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:51,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131001430] [2021-03-10 21:13:51,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019975331] [2021-03-10 21:13:51,065 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:13:51,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:13:51,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:51,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:13:51,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:51,149 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:51,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:51,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 21:13:51,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092935668] [2021-03-10 21:13:51,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:13:51,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:51,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:13:51,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:13:51,150 INFO L87 Difference]: Start difference. First operand 222 states and 607 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) [2021-03-10 21:13:51,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:51,384 INFO L93 Difference]: Finished difference Result 476 states and 1089 transitions. [2021-03-10 21:13:51,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:13:51,384 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 18 [2021-03-10 21:13:51,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:51,386 INFO L225 Difference]: With dead ends: 476 [2021-03-10 21:13:51,386 INFO L226 Difference]: Without dead ends: 470 [2021-03-10 21:13:51,386 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 192.7ms TimeCoverageRelationStatistics Valid=253, Invalid=677, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:13:51,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-03-10 21:13:51,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 205. [2021-03-10 21:13:51,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.661764705882353) internal successors, (543), 204 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:51,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 543 transitions. [2021-03-10 21:13:51,390 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 543 transitions. Word has length 18 [2021-03-10 21:13:51,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:51,390 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 543 transitions. [2021-03-10 21:13:51,390 INFO L481 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) [2021-03-10 21:13:51,390 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 543 transitions. [2021-03-10 21:13:51,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:13:51,390 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:51,390 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:51,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-03-10 21:13:51,603 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:51,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:51,603 INFO L82 PathProgramCache]: Analyzing trace with hash 21712715, now seen corresponding path program 47 times [2021-03-10 21:13:51,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:51,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935413550] [2021-03-10 21:13:51,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:51,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:51,632 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:51,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935413550] [2021-03-10 21:13:51,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940067836] [2021-03-10 21:13:51,633 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:51,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:13:51,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:51,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:13:51,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:51,727 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:51,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:51,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 21:13:51,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266646375] [2021-03-10 21:13:51,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:13:51,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:51,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:13:51,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:13:51,728 INFO L87 Difference]: Start difference. First operand 205 states and 543 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 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) [2021-03-10 21:13:51,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:51,919 INFO L93 Difference]: Finished difference Result 423 states and 962 transitions. [2021-03-10 21:13:51,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:13:51,919 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:13:51,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:51,920 INFO L225 Difference]: With dead ends: 423 [2021-03-10 21:13:51,920 INFO L226 Difference]: Without dead ends: 423 [2021-03-10 21:13:51,920 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 145.7ms TimeCoverageRelationStatistics Valid=259, Invalid=443, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:13:51,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-03-10 21:13:51,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 211. [2021-03-10 21:13:51,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.6904761904761907) internal successors, (565), 210 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:51,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 565 transitions. [2021-03-10 21:13:51,924 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 565 transitions. Word has length 18 [2021-03-10 21:13:51,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:51,924 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 565 transitions. [2021-03-10 21:13:51,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 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) [2021-03-10 21:13:51,924 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 565 transitions. [2021-03-10 21:13:51,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:13:51,924 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:51,924 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:52,134 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-03-10 21:13:52,135 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:52,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:52,135 INFO L82 PathProgramCache]: Analyzing trace with hash -442878389, now seen corresponding path program 48 times [2021-03-10 21:13:52,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:52,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544132865] [2021-03-10 21:13:52,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:52,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:52,164 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:52,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544132865] [2021-03-10 21:13:52,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288914248] [2021-03-10 21:13:52,164 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:13:52,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:13:52,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:52,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:13:52,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:52,246 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:52,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:52,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 21:13:52,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125667821] [2021-03-10 21:13:52,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:13:52,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:52,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:13:52,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:13:52,247 INFO L87 Difference]: Start difference. First operand 211 states and 565 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) [2021-03-10 21:13:52,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:52,489 INFO L93 Difference]: Finished difference Result 326 states and 774 transitions. [2021-03-10 21:13:52,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:13:52,489 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 18 [2021-03-10 21:13:52,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:52,490 INFO L225 Difference]: With dead ends: 326 [2021-03-10 21:13:52,490 INFO L226 Difference]: Without dead ends: 322 [2021-03-10 21:13:52,490 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 188.6ms TimeCoverageRelationStatistics Valid=367, Invalid=689, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:13:52,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-03-10 21:13:52,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 205. [2021-03-10 21:13:52,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.6666666666666665) internal successors, (544), 204 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:52,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 544 transitions. [2021-03-10 21:13:52,493 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 544 transitions. Word has length 18 [2021-03-10 21:13:52,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:52,493 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 544 transitions. [2021-03-10 21:13:52,493 INFO L481 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) [2021-03-10 21:13:52,493 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 544 transitions. [2021-03-10 21:13:52,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:13:52,494 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:52,494 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:52,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-03-10 21:13:52,709 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:52,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:52,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1806453233, now seen corresponding path program 49 times [2021-03-10 21:13:52,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:52,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565622426] [2021-03-10 21:13:52,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:52,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:52,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:52,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565622426] [2021-03-10 21:13:52,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92399435] [2021-03-10 21:13:52,737 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:52,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:52,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:13:52,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:52,820 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:52,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:52,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 21:13:52,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374594928] [2021-03-10 21:13:52,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:13:52,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:52,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:13:52,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:13:52,821 INFO L87 Difference]: Start difference. First operand 205 states and 544 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) [2021-03-10 21:13:53,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:53,029 INFO L93 Difference]: Finished difference Result 460 states and 1057 transitions. [2021-03-10 21:13:53,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:13:53,029 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 18 [2021-03-10 21:13:53,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:53,031 INFO L225 Difference]: With dead ends: 460 [2021-03-10 21:13:53,031 INFO L226 Difference]: Without dead ends: 451 [2021-03-10 21:13:53,031 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 187.8ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:13:53,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-03-10 21:13:53,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 215. [2021-03-10 21:13:53,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.682242990654206) internal successors, (574), 214 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:53,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 574 transitions. [2021-03-10 21:13:53,034 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 574 transitions. Word has length 18 [2021-03-10 21:13:53,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:53,034 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 574 transitions. [2021-03-10 21:13:53,035 INFO L481 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) [2021-03-10 21:13:53,035 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 574 transitions. [2021-03-10 21:13:53,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:13:53,035 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:53,035 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:53,250 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-03-10 21:13:53,251 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:53,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:53,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1900768741, now seen corresponding path program 50 times [2021-03-10 21:13:53,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:53,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344063859] [2021-03-10 21:13:53,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:53,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:53,281 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:53,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344063859] [2021-03-10 21:13:53,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629308905] [2021-03-10 21:13:53,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:53,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:13:53,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:53,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:13:53,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:53,361 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:53,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:53,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 21:13:53,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841577413] [2021-03-10 21:13:53,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:13:53,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:53,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:13:53,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:13:53,363 INFO L87 Difference]: Start difference. First operand 215 states and 574 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) [2021-03-10 21:13:53,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:53,517 INFO L93 Difference]: Finished difference Result 374 states and 891 transitions. [2021-03-10 21:13:53,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:13:53,517 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 18 [2021-03-10 21:13:53,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:53,518 INFO L225 Difference]: With dead ends: 374 [2021-03-10 21:13:53,518 INFO L226 Difference]: Without dead ends: 365 [2021-03-10 21:13:53,518 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 143.6ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:13:53,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-03-10 21:13:53,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 215. [2021-03-10 21:13:53,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.6728971962616823) internal successors, (572), 214 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) [2021-03-10 21:13:53,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 572 transitions. [2021-03-10 21:13:53,523 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 572 transitions. Word has length 18 [2021-03-10 21:13:53,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:53,523 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 572 transitions. [2021-03-10 21:13:53,523 INFO L481 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) [2021-03-10 21:13:53,523 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 572 transitions. [2021-03-10 21:13:53,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:13:53,524 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:53,524 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:53,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-03-10 21:13:53,739 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:53,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:53,739 INFO L82 PathProgramCache]: Analyzing trace with hash 479126159, now seen corresponding path program 51 times [2021-03-10 21:13:53,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:53,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750657372] [2021-03-10 21:13:53,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:53,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:53,762 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:53,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750657372] [2021-03-10 21:13:53,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521862725] [2021-03-10 21:13:53,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:53,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:13:53,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:53,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:13:53,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:53,839 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:53,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:53,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-03-10 21:13:53,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960699695] [2021-03-10 21:13:53,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:13:53,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:53,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:13:53,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:13:53,841 INFO L87 Difference]: Start difference. First operand 215 states and 572 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:54,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:54,002 INFO L93 Difference]: Finished difference Result 439 states and 1014 transitions. [2021-03-10 21:13:54,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:13:54,002 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:13:54,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:54,003 INFO L225 Difference]: With dead ends: 439 [2021-03-10 21:13:54,003 INFO L226 Difference]: Without dead ends: 436 [2021-03-10 21:13:54,004 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 133.2ms TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:13:54,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-03-10 21:13:54,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 233. [2021-03-10 21:13:54,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.689655172413793) internal successors, (624), 232 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:54,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 624 transitions. [2021-03-10 21:13:54,007 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 624 transitions. Word has length 18 [2021-03-10 21:13:54,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:54,007 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 624 transitions. [2021-03-10 21:13:54,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:54,007 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 624 transitions. [2021-03-10 21:13:54,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:13:54,008 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:54,008 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:54,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-03-10 21:13:54,223 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:54,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:54,223 INFO L82 PathProgramCache]: Analyzing trace with hash 14535055, now seen corresponding path program 52 times [2021-03-10 21:13:54,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:54,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787159186] [2021-03-10 21:13:54,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:54,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:54,243 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:54,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787159186] [2021-03-10 21:13:54,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117408219] [2021-03-10 21:13:54,243 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:13:54,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:13:54,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:54,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:13:54,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:54,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:54,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:54,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-03-10 21:13:54,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658382036] [2021-03-10 21:13:54,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:13:54,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:54,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:13:54,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:13:54,321 INFO L87 Difference]: Start difference. First operand 233 states and 624 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:54,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:54,546 INFO L93 Difference]: Finished difference Result 389 states and 889 transitions. [2021-03-10 21:13:54,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:13:54,546 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:13:54,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:54,547 INFO L225 Difference]: With dead ends: 389 [2021-03-10 21:13:54,547 INFO L226 Difference]: Without dead ends: 383 [2021-03-10 21:13:54,547 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 190.1ms TimeCoverageRelationStatistics Valid=380, Invalid=742, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:13:54,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-03-10 21:13:54,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 216. [2021-03-10 21:13:54,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.6511627906976742) internal successors, (570), 215 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:54,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 570 transitions. [2021-03-10 21:13:54,551 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 570 transitions. Word has length 18 [2021-03-10 21:13:54,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:54,551 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 570 transitions. [2021-03-10 21:13:54,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:54,551 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 570 transitions. [2021-03-10 21:13:54,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:13:54,551 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:54,551 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:54,765 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:54,766 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:54,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:54,766 INFO L82 PathProgramCache]: Analyzing trace with hash -19064173, now seen corresponding path program 53 times [2021-03-10 21:13:54,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:54,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753626844] [2021-03-10 21:13:54,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:54,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:54,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:54,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753626844] [2021-03-10 21:13:54,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864091506] [2021-03-10 21:13:54,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:54,809 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:13:54,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:54,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:13:54,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:54,870 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:54,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:54,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:13:54,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071600294] [2021-03-10 21:13:54,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:13:54,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:54,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:13:54,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:13:54,871 INFO L87 Difference]: Start difference. First operand 216 states and 570 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) [2021-03-10 21:13:55,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:55,097 INFO L93 Difference]: Finished difference Result 347 states and 818 transitions. [2021-03-10 21:13:55,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:13:55,097 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 18 [2021-03-10 21:13:55,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:55,098 INFO L225 Difference]: With dead ends: 347 [2021-03-10 21:13:55,099 INFO L226 Difference]: Without dead ends: 339 [2021-03-10 21:13:55,099 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 213.3ms TimeCoverageRelationStatistics Valid=373, Invalid=817, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:13:55,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-03-10 21:13:55,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 227. [2021-03-10 21:13:55,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.65929203539823) internal successors, (601), 226 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:55,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 601 transitions. [2021-03-10 21:13:55,102 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 601 transitions. Word has length 18 [2021-03-10 21:13:55,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:55,102 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 601 transitions. [2021-03-10 21:13:55,102 INFO L481 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) [2021-03-10 21:13:55,102 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 601 transitions. [2021-03-10 21:13:55,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:13:55,102 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:55,102 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:55,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-03-10 21:13:55,311 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:55,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:55,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1774041035, now seen corresponding path program 54 times [2021-03-10 21:13:55,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:55,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566720230] [2021-03-10 21:13:55,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:55,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:55,329 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:55,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566720230] [2021-03-10 21:13:55,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530236380] [2021-03-10 21:13:55,329 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:13:55,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:13:55,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:55,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:13:55,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:55,426 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:55,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:55,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-03-10 21:13:55,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223918043] [2021-03-10 21:13:55,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:13:55,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:55,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:13:55,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:13:55,427 INFO L87 Difference]: Start difference. First operand 227 states and 601 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:55,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:55,595 INFO L93 Difference]: Finished difference Result 526 states and 1217 transitions. [2021-03-10 21:13:55,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:13:55,595 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:13:55,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:55,597 INFO L225 Difference]: With dead ends: 526 [2021-03-10 21:13:55,598 INFO L226 Difference]: Without dead ends: 523 [2021-03-10 21:13:55,598 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 135.3ms TimeCoverageRelationStatistics Valid=226, Invalid=374, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:13:55,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-03-10 21:13:55,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 274. [2021-03-10 21:13:55,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.7472527472527473) internal successors, (750), 273 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:55,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 750 transitions. [2021-03-10 21:13:55,602 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 750 transitions. Word has length 18 [2021-03-10 21:13:55,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:55,602 INFO L480 AbstractCegarLoop]: Abstraction has 274 states and 750 transitions. [2021-03-10 21:13:55,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:55,602 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 750 transitions. [2021-03-10 21:13:55,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:13:55,602 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:55,602 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:55,815 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:55,815 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:55,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:55,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1309449931, now seen corresponding path program 55 times [2021-03-10 21:13:55,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:55,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144581618] [2021-03-10 21:13:55,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:55,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:55,835 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:55,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144581618] [2021-03-10 21:13:55,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277372714] [2021-03-10 21:13:55,835 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:55,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:55,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:13:55,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:55,920 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:55,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:55,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-03-10 21:13:55,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568468088] [2021-03-10 21:13:55,922 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:13:55,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:55,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:13:55,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:13:55,922 INFO L87 Difference]: Start difference. First operand 274 states and 750 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 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) [2021-03-10 21:13:56,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:56,200 INFO L93 Difference]: Finished difference Result 468 states and 1095 transitions. [2021-03-10 21:13:56,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:13:56,201 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:13:56,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:56,202 INFO L225 Difference]: With dead ends: 468 [2021-03-10 21:13:56,202 INFO L226 Difference]: Without dead ends: 464 [2021-03-10 21:13:56,202 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 231.1ms TimeCoverageRelationStatistics Valid=441, Invalid=891, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:13:56,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-03-10 21:13:56,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 272. [2021-03-10 21:13:56,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.734317343173432) internal successors, (741), 271 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:56,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 741 transitions. [2021-03-10 21:13:56,206 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 741 transitions. Word has length 18 [2021-03-10 21:13:56,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:56,206 INFO L480 AbstractCegarLoop]: Abstraction has 272 states and 741 transitions. [2021-03-10 21:13:56,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 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) [2021-03-10 21:13:56,206 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 741 transitions. [2021-03-10 21:13:56,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:13:56,207 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:56,207 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:56,407 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-03-10 21:13:56,407 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:56,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:56,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1275850703, now seen corresponding path program 56 times [2021-03-10 21:13:56,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:56,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718135073] [2021-03-10 21:13:56,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:56,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:56,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:56,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718135073] [2021-03-10 21:13:56,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910792406] [2021-03-10 21:13:56,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:56,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:13:56,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:56,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:13:56,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:56,534 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:56,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:56,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-03-10 21:13:56,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891088862] [2021-03-10 21:13:56,535 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:13:56,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:56,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:13:56,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:13:56,536 INFO L87 Difference]: Start difference. First operand 272 states and 741 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:56,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:56,798 INFO L93 Difference]: Finished difference Result 487 states and 1167 transitions. [2021-03-10 21:13:56,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:13:56,799 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:13:56,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:56,800 INFO L225 Difference]: With dead ends: 487 [2021-03-10 21:13:56,800 INFO L226 Difference]: Without dead ends: 479 [2021-03-10 21:13:56,800 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 234.4ms TimeCoverageRelationStatistics Valid=387, Invalid=873, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 21:13:56,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-03-10 21:13:56,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 293. [2021-03-10 21:13:56,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.791095890410959) internal successors, (815), 292 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:56,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 815 transitions. [2021-03-10 21:13:56,804 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 815 transitions. Word has length 18 [2021-03-10 21:13:56,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:56,804 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 815 transitions. [2021-03-10 21:13:56,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:56,804 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 815 transitions. [2021-03-10 21:13:56,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:13:56,805 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:56,805 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:57,019 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:57,019 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:57,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:57,019 INFO L82 PathProgramCache]: Analyzing trace with hash 234274635, now seen corresponding path program 57 times [2021-03-10 21:13:57,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:57,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343635402] [2021-03-10 21:13:57,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:57,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:57,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:57,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343635402] [2021-03-10 21:13:57,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487243489] [2021-03-10 21:13:57,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:57,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:13:57,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:57,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:13:57,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:57,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:57,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:57,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:13:57,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105906066] [2021-03-10 21:13:57,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:13:57,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:57,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:13:57,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:13:57,130 INFO L87 Difference]: Start difference. First operand 293 states and 815 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) [2021-03-10 21:13:57,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:57,346 INFO L93 Difference]: Finished difference Result 466 states and 1157 transitions. [2021-03-10 21:13:57,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:13:57,347 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 18 [2021-03-10 21:13:57,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:57,348 INFO L225 Difference]: With dead ends: 466 [2021-03-10 21:13:57,348 INFO L226 Difference]: Without dead ends: 454 [2021-03-10 21:13:57,348 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 201.0ms TimeCoverageRelationStatistics Valid=364, Invalid=896, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 21:13:57,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-03-10 21:13:57,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 312. [2021-03-10 21:13:57,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.8006430868167205) internal successors, (871), 311 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:57,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 871 transitions. [2021-03-10 21:13:57,352 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 871 transitions. Word has length 18 [2021-03-10 21:13:57,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:57,352 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 871 transitions. [2021-03-10 21:13:57,353 INFO L481 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) [2021-03-10 21:13:57,353 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 871 transitions. [2021-03-10 21:13:57,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:13:57,353 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:57,353 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:57,563 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:57,563 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:57,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:57,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1797099147, now seen corresponding path program 58 times [2021-03-10 21:13:57,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:57,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967178588] [2021-03-10 21:13:57,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:57,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:57,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:57,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967178588] [2021-03-10 21:13:57,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745220781] [2021-03-10 21:13:57,589 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:57,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:13:57,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:57,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:13:57,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:57,654 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:57,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:57,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 21:13:57,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467575403] [2021-03-10 21:13:57,654 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:13:57,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:57,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:13:57,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:13:57,654 INFO L87 Difference]: Start difference. First operand 312 states and 871 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:57,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:57,727 INFO L93 Difference]: Finished difference Result 436 states and 1155 transitions. [2021-03-10 21:13:57,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:13:57,728 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:13:57,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:57,729 INFO L225 Difference]: With dead ends: 436 [2021-03-10 21:13:57,729 INFO L226 Difference]: Without dead ends: 436 [2021-03-10 21:13:57,729 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 60.0ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:13:57,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-03-10 21:13:57,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 316. [2021-03-10 21:13:57,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.812698412698413) internal successors, (886), 315 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:57,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 886 transitions. [2021-03-10 21:13:57,733 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 886 transitions. Word has length 18 [2021-03-10 21:13:57,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:57,733 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 886 transitions. [2021-03-10 21:13:57,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:57,733 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 886 transitions. [2021-03-10 21:13:57,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:13:57,734 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:57,734 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:57,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:57,941 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:57,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:57,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1169170729, now seen corresponding path program 59 times [2021-03-10 21:13:57,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:57,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057021045] [2021-03-10 21:13:57,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:57,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:57,985 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:57,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057021045] [2021-03-10 21:13:57,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197718923] [2021-03-10 21:13:57,985 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:58,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:13:58,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:58,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:13:58,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:58,064 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:58,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:58,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 21:13:58,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142841467] [2021-03-10 21:13:58,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:13:58,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:58,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:13:58,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:13:58,065 INFO L87 Difference]: Start difference. First operand 316 states and 886 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) [2021-03-10 21:13:58,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:58,181 INFO L93 Difference]: Finished difference Result 389 states and 1033 transitions. [2021-03-10 21:13:58,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:13:58,181 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 18 [2021-03-10 21:13:58,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:58,182 INFO L225 Difference]: With dead ends: 389 [2021-03-10 21:13:58,182 INFO L226 Difference]: Without dead ends: 389 [2021-03-10 21:13:58,182 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 104.4ms TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:13:58,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-03-10 21:13:58,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 319. [2021-03-10 21:13:58,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.8144654088050314) internal successors, (895), 318 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:58,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 895 transitions. [2021-03-10 21:13:58,186 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 895 transitions. Word has length 18 [2021-03-10 21:13:58,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:58,186 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 895 transitions. [2021-03-10 21:13:58,186 INFO L481 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) [2021-03-10 21:13:58,186 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 895 transitions. [2021-03-10 21:13:58,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:13:58,186 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:58,187 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:58,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-03-10 21:13:58,399 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:58,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:58,399 INFO L82 PathProgramCache]: Analyzing trace with hash 937613391, now seen corresponding path program 60 times [2021-03-10 21:13:58,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:58,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177100248] [2021-03-10 21:13:58,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:58,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:58,423 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:58,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177100248] [2021-03-10 21:13:58,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006139547] [2021-03-10 21:13:58,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:58,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:13:58,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:58,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:13:58,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:58,505 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:58,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:58,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 21:13:58,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721366955] [2021-03-10 21:13:58,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:13:58,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:58,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:13:58,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:13:58,506 INFO L87 Difference]: Start difference. First operand 319 states and 895 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) [2021-03-10 21:13:58,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:58,663 INFO L93 Difference]: Finished difference Result 399 states and 1054 transitions. [2021-03-10 21:13:58,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:13:58,664 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 18 [2021-03-10 21:13:58,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:58,665 INFO L225 Difference]: With dead ends: 399 [2021-03-10 21:13:58,665 INFO L226 Difference]: Without dead ends: 399 [2021-03-10 21:13:58,665 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 115.4ms TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:13:58,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-03-10 21:13:58,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 322. [2021-03-10 21:13:58,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.8161993769470404) internal successors, (904), 321 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:58,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 904 transitions. [2021-03-10 21:13:58,669 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 904 transitions. Word has length 18 [2021-03-10 21:13:58,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:58,670 INFO L480 AbstractCegarLoop]: Abstraction has 322 states and 904 transitions. [2021-03-10 21:13:58,671 INFO L481 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) [2021-03-10 21:13:58,671 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 904 transitions. [2021-03-10 21:13:58,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:13:58,671 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:58,671 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:58,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:58,883 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:58,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:58,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1211183145, now seen corresponding path program 61 times [2021-03-10 21:13:58,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:58,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24699249] [2021-03-10 21:13:58,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:58,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:58,913 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:58,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24699249] [2021-03-10 21:13:58,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851009992] [2021-03-10 21:13:58,914 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:13:58,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:58,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:58,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:58,982 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:58,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:58,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 21:13:58,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558060877] [2021-03-10 21:13:58,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:13:58,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:58,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:13:58,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:13:58,983 INFO L87 Difference]: Start difference. First operand 322 states and 904 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) [2021-03-10 21:13:59,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:59,188 INFO L93 Difference]: Finished difference Result 497 states and 1220 transitions. [2021-03-10 21:13:59,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:13:59,189 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 18 [2021-03-10 21:13:59,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:59,190 INFO L225 Difference]: With dead ends: 497 [2021-03-10 21:13:59,190 INFO L226 Difference]: Without dead ends: 497 [2021-03-10 21:13:59,190 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 147.9ms TimeCoverageRelationStatistics Valid=259, Invalid=443, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:13:59,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-03-10 21:13:59,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 319. [2021-03-10 21:13:59,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.8207547169811322) internal successors, (897), 318 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:59,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 897 transitions. [2021-03-10 21:13:59,196 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 897 transitions. Word has length 18 [2021-03-10 21:13:59,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:59,196 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 897 transitions. [2021-03-10 21:13:59,196 INFO L481 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) [2021-03-10 21:13:59,196 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 897 transitions. [2021-03-10 21:13:59,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:13:59,197 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:59,197 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:59,411 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-03-10 21:13:59,411 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:59,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:59,411 INFO L82 PathProgramCache]: Analyzing trace with hash -639728339, now seen corresponding path program 62 times [2021-03-10 21:13:59,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:59,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451000009] [2021-03-10 21:13:59,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:59,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:59,437 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:59,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451000009] [2021-03-10 21:13:59,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523529290] [2021-03-10 21:13:59,438 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 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 [2021-03-10 21:13:59,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:13:59,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:59,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:13:59,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:59,507 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:59,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:59,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 21:13:59,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581103973] [2021-03-10 21:13:59,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:13:59,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:59,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:13:59,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:13:59,508 INFO L87 Difference]: Start difference. First operand 319 states and 897 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) [2021-03-10 21:13:59,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:59,728 INFO L93 Difference]: Finished difference Result 422 states and 1069 transitions. [2021-03-10 21:13:59,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:13:59,728 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 18 [2021-03-10 21:13:59,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:59,729 INFO L225 Difference]: With dead ends: 422 [2021-03-10 21:13:59,729 INFO L226 Difference]: Without dead ends: 416 [2021-03-10 21:13:59,730 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 184.1ms TimeCoverageRelationStatistics Valid=367, Invalid=689, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:13:59,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-03-10 21:13:59,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 313. [2021-03-10 21:13:59,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.8108974358974357) internal successors, (877), 312 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:59,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 877 transitions. [2021-03-10 21:13:59,733 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 877 transitions. Word has length 18 [2021-03-10 21:13:59,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:59,733 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 877 transitions. [2021-03-10 21:13:59,733 INFO L481 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) [2021-03-10 21:13:59,733 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 877 transitions. [2021-03-10 21:13:59,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:13:59,734 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:59,734 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:59,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-03-10 21:13:59,949 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:59,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:59,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1723667411, now seen corresponding path program 63 times [2021-03-10 21:13:59,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:59,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121800775] [2021-03-10 21:13:59,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:59,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:59,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:59,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121800775] [2021-03-10 21:13:59,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608208505] [2021-03-10 21:13:59,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:13:59,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:13:59,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:59,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:13:59,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:00,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:00,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:00,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 21:14:00,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608540191] [2021-03-10 21:14:00,050 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:14:00,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:00,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:14:00,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:14:00,050 INFO L87 Difference]: Start difference. First operand 313 states and 877 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 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) [2021-03-10 21:14:00,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:00,220 INFO L93 Difference]: Finished difference Result 573 states and 1416 transitions. [2021-03-10 21:14:00,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:14:00,220 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:14:00,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:00,222 INFO L225 Difference]: With dead ends: 573 [2021-03-10 21:14:00,222 INFO L226 Difference]: Without dead ends: 570 [2021-03-10 21:14:00,222 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 134.9ms TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:14:00,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-03-10 21:14:00,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 353. [2021-03-10 21:14:00,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 2.875) internal successors, (1012), 352 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:00,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1012 transitions. [2021-03-10 21:14:00,227 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1012 transitions. Word has length 18 [2021-03-10 21:14:00,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:00,227 INFO L480 AbstractCegarLoop]: Abstraction has 353 states and 1012 transitions. [2021-03-10 21:14:00,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 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) [2021-03-10 21:14:00,227 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1012 transitions. [2021-03-10 21:14:00,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:14:00,227 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:00,227 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:00,442 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-03-10 21:14:00,442 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:00,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:00,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1259076307, now seen corresponding path program 64 times [2021-03-10 21:14:00,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:00,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454664947] [2021-03-10 21:14:00,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:00,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:00,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:00,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454664947] [2021-03-10 21:14:00,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545184746] [2021-03-10 21:14:00,468 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 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 [2021-03-10 21:14:00,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:14:00,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:00,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:14:00,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:00,534 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:00,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:00,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 21:14:00,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365816669] [2021-03-10 21:14:00,535 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:14:00,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:00,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:14:00,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:14:00,535 INFO L87 Difference]: Start difference. First operand 353 states and 1012 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) [2021-03-10 21:14:00,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:00,738 INFO L93 Difference]: Finished difference Result 554 states and 1385 transitions. [2021-03-10 21:14:00,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:14:00,739 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 18 [2021-03-10 21:14:00,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:00,740 INFO L225 Difference]: With dead ends: 554 [2021-03-10 21:14:00,740 INFO L226 Difference]: Without dead ends: 550 [2021-03-10 21:14:00,740 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 163.5ms TimeCoverageRelationStatistics Valid=253, Invalid=677, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:14:00,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-03-10 21:14:00,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 334. [2021-03-10 21:14:00,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.8228228228228227) internal successors, (940), 333 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:00,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 940 transitions. [2021-03-10 21:14:00,745 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 940 transitions. Word has length 18 [2021-03-10 21:14:00,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:00,745 INFO L480 AbstractCegarLoop]: Abstraction has 334 states and 940 transitions. [2021-03-10 21:14:00,745 INFO L481 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) [2021-03-10 21:14:00,745 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 940 transitions. [2021-03-10 21:14:00,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:14:00,746 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:00,746 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:00,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:00,946 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:00,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:00,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1225477079, now seen corresponding path program 65 times [2021-03-10 21:14:00,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:00,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702669643] [2021-03-10 21:14:00,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:00,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:00,972 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:00,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702669643] [2021-03-10 21:14:00,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010805192] [2021-03-10 21:14:00,972 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:14:00,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:00,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:00,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:14:00,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:01,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:01,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:01,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 21:14:01,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763078981] [2021-03-10 21:14:01,050 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:14:01,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:01,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:14:01,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:14:01,050 INFO L87 Difference]: Start difference. First operand 334 states and 940 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) [2021-03-10 21:14:01,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:01,269 INFO L93 Difference]: Finished difference Result 542 states and 1356 transitions. [2021-03-10 21:14:01,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:14:01,269 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 18 [2021-03-10 21:14:01,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:01,271 INFO L225 Difference]: With dead ends: 542 [2021-03-10 21:14:01,271 INFO L226 Difference]: Without dead ends: 534 [2021-03-10 21:14:01,271 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 181.1ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:14:01,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-03-10 21:14:01,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 348. [2021-03-10 21:14:01,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.829971181556196) internal successors, (982), 347 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:01,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 982 transitions. [2021-03-10 21:14:01,275 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 982 transitions. Word has length 18 [2021-03-10 21:14:01,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:01,275 INFO L480 AbstractCegarLoop]: Abstraction has 348 states and 982 transitions. [2021-03-10 21:14:01,275 INFO L481 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) [2021-03-10 21:14:01,275 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 982 transitions. [2021-03-10 21:14:01,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:14:01,276 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:01,276 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:01,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-03-10 21:14:01,479 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:01,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:01,479 INFO L82 PathProgramCache]: Analyzing trace with hash 183901011, now seen corresponding path program 66 times [2021-03-10 21:14:01,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:01,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934935031] [2021-03-10 21:14:01,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:01,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:01,508 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:01,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934935031] [2021-03-10 21:14:01,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27059172] [2021-03-10 21:14:01,508 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:01,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:14:01,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:01,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:14:01,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:01,581 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:01,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:01,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 21:14:01,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844811669] [2021-03-10 21:14:01,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:14:01,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:01,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:14:01,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:14:01,582 INFO L87 Difference]: Start difference. First operand 348 states and 982 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) [2021-03-10 21:14:01,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:01,736 INFO L93 Difference]: Finished difference Result 473 states and 1218 transitions. [2021-03-10 21:14:01,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:14:01,736 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 18 [2021-03-10 21:14:01,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:01,737 INFO L225 Difference]: With dead ends: 473 [2021-03-10 21:14:01,737 INFO L226 Difference]: Without dead ends: 467 [2021-03-10 21:14:01,738 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 152.7ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:14:01,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-03-10 21:14:01,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 349. [2021-03-10 21:14:01,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.82183908045977) internal successors, (982), 348 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:01,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 982 transitions. [2021-03-10 21:14:01,742 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 982 transitions. Word has length 18 [2021-03-10 21:14:01,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:01,742 INFO L480 AbstractCegarLoop]: Abstraction has 349 states and 982 transitions. [2021-03-10 21:14:01,742 INFO L481 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) [2021-03-10 21:14:01,742 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 982 transitions. [2021-03-10 21:14:01,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:14:01,742 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:01,742 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:01,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:01,947 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:01,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:01,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1388993577, now seen corresponding path program 67 times [2021-03-10 21:14:01,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:01,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319596360] [2021-03-10 21:14:01,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:01,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:01,974 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:01,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319596360] [2021-03-10 21:14:01,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244424978] [2021-03-10 21:14:01,974 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:01,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:01,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:14:01,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:02,036 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:02,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:02,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 21:14:02,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209271622] [2021-03-10 21:14:02,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:14:02,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:02,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:14:02,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:02,037 INFO L87 Difference]: Start difference. First operand 349 states and 982 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:02,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:02,094 INFO L93 Difference]: Finished difference Result 405 states and 1105 transitions. [2021-03-10 21:14:02,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:14:02,094 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:14:02,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:02,095 INFO L225 Difference]: With dead ends: 405 [2021-03-10 21:14:02,096 INFO L226 Difference]: Without dead ends: 397 [2021-03-10 21:14:02,096 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 74.1ms TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:14:02,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-03-10 21:14:02,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 349. [2021-03-10 21:14:02,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.8189655172413794) internal successors, (981), 348 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:02,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 981 transitions. [2021-03-10 21:14:02,100 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 981 transitions. Word has length 18 [2021-03-10 21:14:02,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:02,100 INFO L480 AbstractCegarLoop]: Abstraction has 349 states and 981 transitions. [2021-03-10 21:14:02,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:02,100 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 981 transitions. [2021-03-10 21:14:02,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:14:02,100 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:02,100 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:02,302 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable120 [2021-03-10 21:14:02,303 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:02,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:02,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1365743627, now seen corresponding path program 68 times [2021-03-10 21:14:02,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:02,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743429833] [2021-03-10 21:14:02,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:02,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:02,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:02,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743429833] [2021-03-10 21:14:02,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661544029] [2021-03-10 21:14:02,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:02,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:02,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:02,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:14:02,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:02,411 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:02,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:02,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:14:02,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000765313] [2021-03-10 21:14:02,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:14:02,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:02,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:14:02,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:14:02,412 INFO L87 Difference]: Start difference. First operand 349 states and 981 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) [2021-03-10 21:14:02,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:02,605 INFO L93 Difference]: Finished difference Result 447 states and 1174 transitions. [2021-03-10 21:14:02,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:14:02,605 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 [2021-03-10 21:14:02,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:02,607 INFO L225 Difference]: With dead ends: 447 [2021-03-10 21:14:02,607 INFO L226 Difference]: Without dead ends: 447 [2021-03-10 21:14:02,607 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 167.8ms TimeCoverageRelationStatistics Valid=256, Invalid=556, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:14:02,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-03-10 21:14:02,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 354. [2021-03-10 21:14:02,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.818696883852691) internal successors, (995), 353 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:02,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 995 transitions. [2021-03-10 21:14:02,611 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 995 transitions. Word has length 18 [2021-03-10 21:14:02,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:02,611 INFO L480 AbstractCegarLoop]: Abstraction has 354 states and 995 transitions. [2021-03-10 21:14:02,611 INFO L481 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) [2021-03-10 21:14:02,611 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 995 transitions. [2021-03-10 21:14:02,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:14:02,612 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:02,612 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:02,815 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:02,815 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:02,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:02,815 INFO L82 PathProgramCache]: Analyzing trace with hash 63358731, now seen corresponding path program 69 times [2021-03-10 21:14:02,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:02,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853433640] [2021-03-10 21:14:02,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:02,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:02,846 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:02,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853433640] [2021-03-10 21:14:02,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667375083] [2021-03-10 21:14:02,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:02,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:14:02,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:02,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:14:02,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:02,934 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:02,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:02,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-03-10 21:14:02,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346755307] [2021-03-10 21:14:02,935 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:14:02,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:02,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:14:02,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:14:02,935 INFO L87 Difference]: Start difference. First operand 354 states and 995 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) [2021-03-10 21:14:03,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:03,110 INFO L93 Difference]: Finished difference Result 485 states and 1256 transitions. [2021-03-10 21:14:03,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:14:03,110 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 18 [2021-03-10 21:14:03,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:03,112 INFO L225 Difference]: With dead ends: 485 [2021-03-10 21:14:03,112 INFO L226 Difference]: Without dead ends: 483 [2021-03-10 21:14:03,112 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 134.8ms TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:14:03,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-03-10 21:14:03,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 352. [2021-03-10 21:14:03,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 2.8290598290598292) internal successors, (993), 351 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:03,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 993 transitions. [2021-03-10 21:14:03,116 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 993 transitions. Word has length 18 [2021-03-10 21:14:03,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:03,116 INFO L480 AbstractCegarLoop]: Abstraction has 352 states and 993 transitions. [2021-03-10 21:14:03,116 INFO L481 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) [2021-03-10 21:14:03,116 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 993 transitions. [2021-03-10 21:14:03,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:14:03,117 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:03,117 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:03,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-03-10 21:14:03,331 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:03,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:03,331 INFO L82 PathProgramCache]: Analyzing trace with hash 21346315, now seen corresponding path program 70 times [2021-03-10 21:14:03,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:03,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931854525] [2021-03-10 21:14:03,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:03,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:03,352 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:03,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931854525] [2021-03-10 21:14:03,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973009293] [2021-03-10 21:14:03,353 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:14:03,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:14:03,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:03,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:14:03,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:03,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:03,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:03,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-03-10 21:14:03,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793715390] [2021-03-10 21:14:03,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:14:03,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:03,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:14:03,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:14:03,437 INFO L87 Difference]: Start difference. First operand 352 states and 993 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) [2021-03-10 21:14:03,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:03,595 INFO L93 Difference]: Finished difference Result 553 states and 1393 transitions. [2021-03-10 21:14:03,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:14:03,596 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 18 [2021-03-10 21:14:03,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:03,600 INFO L225 Difference]: With dead ends: 553 [2021-03-10 21:14:03,600 INFO L226 Difference]: Without dead ends: 553 [2021-03-10 21:14:03,600 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 130.0ms TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:14:03,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-03-10 21:14:03,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 355. [2021-03-10 21:14:03,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.824858757062147) internal successors, (1000), 354 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:03,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1000 transitions. [2021-03-10 21:14:03,605 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1000 transitions. Word has length 18 [2021-03-10 21:14:03,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:03,605 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 1000 transitions. [2021-03-10 21:14:03,605 INFO L481 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) [2021-03-10 21:14:03,605 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1000 transitions. [2021-03-10 21:14:03,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:14:03,605 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:03,605 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:03,820 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:03,820 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:03,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:03,820 INFO L82 PathProgramCache]: Analyzing trace with hash 592801121, now seen corresponding path program 71 times [2021-03-10 21:14:03,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:03,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138003388] [2021-03-10 21:14:03,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:03,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:03,840 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:03,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138003388] [2021-03-10 21:14:03,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473295556] [2021-03-10 21:14:03,841 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:03,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:14:03,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:03,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:14:03,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:03,925 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:03,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:03,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-03-10 21:14:03,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593863598] [2021-03-10 21:14:03,926 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:14:03,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:03,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:14:03,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:14:03,926 INFO L87 Difference]: Start difference. First operand 355 states and 1000 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) [2021-03-10 21:14:04,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:04,154 INFO L93 Difference]: Finished difference Result 530 states and 1319 transitions. [2021-03-10 21:14:04,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:14:04,155 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 18 [2021-03-10 21:14:04,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:04,155 INFO L225 Difference]: With dead ends: 530 [2021-03-10 21:14:04,155 INFO L226 Difference]: Without dead ends: 521 [2021-03-10 21:14:04,156 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 193.5ms TimeCoverageRelationStatistics Valid=380, Invalid=742, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:14:04,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-03-10 21:14:04,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 341. [2021-03-10 21:14:04,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.8) internal successors, (952), 340 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:04,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 952 transitions. [2021-03-10 21:14:04,161 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 952 transitions. Word has length 18 [2021-03-10 21:14:04,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:04,161 INFO L480 AbstractCegarLoop]: Abstraction has 341 states and 952 transitions. [2021-03-10 21:14:04,161 INFO L481 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) [2021-03-10 21:14:04,161 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 952 transitions. [2021-03-10 21:14:04,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:14:04,162 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:04,162 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:04,362 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-03-10 21:14:04,362 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:04,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:04,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1128030923, now seen corresponding path program 72 times [2021-03-10 21:14:04,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:04,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114332752] [2021-03-10 21:14:04,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:04,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:04,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:04,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114332752] [2021-03-10 21:14:04,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608540032] [2021-03-10 21:14:04,392 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:04,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:14:04,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:04,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:14:04,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:04,466 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:04,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:04,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:14:04,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044557324] [2021-03-10 21:14:04,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:14:04,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:04,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:14:04,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:14:04,467 INFO L87 Difference]: Start difference. First operand 341 states and 952 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) [2021-03-10 21:14:04,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:04,701 INFO L93 Difference]: Finished difference Result 483 states and 1236 transitions. [2021-03-10 21:14:04,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:14:04,701 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 [2021-03-10 21:14:04,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:04,702 INFO L225 Difference]: With dead ends: 483 [2021-03-10 21:14:04,702 INFO L226 Difference]: Without dead ends: 471 [2021-03-10 21:14:04,702 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 196.5ms TimeCoverageRelationStatistics Valid=373, Invalid=817, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:14:04,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-03-10 21:14:04,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 348. [2021-03-10 21:14:04,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.809798270893372) internal successors, (975), 347 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:04,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 975 transitions. [2021-03-10 21:14:04,707 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 975 transitions. Word has length 18 [2021-03-10 21:14:04,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:04,707 INFO L480 AbstractCegarLoop]: Abstraction has 348 states and 975 transitions. [2021-03-10 21:14:04,707 INFO L481 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) [2021-03-10 21:14:04,707 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 975 transitions. [2021-03-10 21:14:04,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:14:04,707 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:04,708 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:04,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-03-10 21:14:04,920 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:04,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:04,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1656289961, now seen corresponding path program 73 times [2021-03-10 21:14:04,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:04,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935122590] [2021-03-10 21:14:04,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:04,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:04,950 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:04,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935122590] [2021-03-10 21:14:04,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607780416] [2021-03-10 21:14:04,950 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:04,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:04,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:14:04,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:05,048 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:05,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:05,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:14:05,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134518483] [2021-03-10 21:14:05,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:14:05,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:05,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:14:05,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:14:05,049 INFO L87 Difference]: Start difference. First operand 348 states and 975 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) [2021-03-10 21:14:05,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:05,271 INFO L93 Difference]: Finished difference Result 521 states and 1344 transitions. [2021-03-10 21:14:05,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:14:05,271 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 18 [2021-03-10 21:14:05,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:05,272 INFO L225 Difference]: With dead ends: 521 [2021-03-10 21:14:05,272 INFO L226 Difference]: Without dead ends: 521 [2021-03-10 21:14:05,272 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 198.5ms TimeCoverageRelationStatistics Valid=300, Invalid=692, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:14:05,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-03-10 21:14:05,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 368. [2021-03-10 21:14:05,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 2.8147138964577656) internal successors, (1033), 367 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:05,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1033 transitions. [2021-03-10 21:14:05,277 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1033 transitions. Word has length 18 [2021-03-10 21:14:05,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:05,277 INFO L480 AbstractCegarLoop]: Abstraction has 368 states and 1033 transitions. [2021-03-10 21:14:05,277 INFO L481 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) [2021-03-10 21:14:05,277 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1033 transitions. [2021-03-10 21:14:05,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:14:05,277 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:05,277 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:05,478 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:05,478 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:05,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:05,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1268731953, now seen corresponding path program 74 times [2021-03-10 21:14:05,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:05,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127090268] [2021-03-10 21:14:05,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:05,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:05,501 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:05,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127090268] [2021-03-10 21:14:05,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619800379] [2021-03-10 21:14:05,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:05,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:05,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:05,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:14:05,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:05,590 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:05,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:05,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-03-10 21:14:05,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214216717] [2021-03-10 21:14:05,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:14:05,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:05,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:14:05,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:14:05,591 INFO L87 Difference]: Start difference. First operand 368 states and 1033 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) [2021-03-10 21:14:05,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:05,780 INFO L93 Difference]: Finished difference Result 613 states and 1567 transitions. [2021-03-10 21:14:05,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:14:05,780 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 18 [2021-03-10 21:14:05,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:05,781 INFO L225 Difference]: With dead ends: 613 [2021-03-10 21:14:05,781 INFO L226 Difference]: Without dead ends: 613 [2021-03-10 21:14:05,781 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 162.1ms TimeCoverageRelationStatistics Valid=230, Invalid=472, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:14:05,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-03-10 21:14:05,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 413. [2021-03-10 21:14:05,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.8567961165048543) internal successors, (1177), 412 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:05,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1177 transitions. [2021-03-10 21:14:05,786 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1177 transitions. Word has length 18 [2021-03-10 21:14:05,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:05,786 INFO L480 AbstractCegarLoop]: Abstraction has 413 states and 1177 transitions. [2021-03-10 21:14:05,787 INFO L481 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) [2021-03-10 21:14:05,787 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1177 transitions. [2021-03-10 21:14:05,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:14:05,791 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:05,791 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:05,991 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-03-10 21:14:05,991 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:05,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:05,992 INFO L82 PathProgramCache]: Analyzing trace with hash -424946089, now seen corresponding path program 75 times [2021-03-10 21:14:05,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:05,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75954445] [2021-03-10 21:14:05,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:05,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:06,012 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:06,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75954445] [2021-03-10 21:14:06,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823766162] [2021-03-10 21:14:06,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:06,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:14:06,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:06,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:14:06,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:06,106 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:06,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:06,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-03-10 21:14:06,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377947834] [2021-03-10 21:14:06,108 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:14:06,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:06,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:14:06,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:14:06,108 INFO L87 Difference]: Start difference. First operand 413 states and 1177 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:06,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:06,279 INFO L93 Difference]: Finished difference Result 723 states and 1864 transitions. [2021-03-10 21:14:06,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:14:06,280 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:14:06,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:06,281 INFO L225 Difference]: With dead ends: 723 [2021-03-10 21:14:06,281 INFO L226 Difference]: Without dead ends: 723 [2021-03-10 21:14:06,281 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 137.4ms TimeCoverageRelationStatistics Valid=226, Invalid=374, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:14:06,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2021-03-10 21:14:06,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 473. [2021-03-10 21:14:06,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 2.9110169491525424) internal successors, (1374), 472 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:06,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1374 transitions. [2021-03-10 21:14:06,287 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1374 transitions. Word has length 18 [2021-03-10 21:14:06,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:06,287 INFO L480 AbstractCegarLoop]: Abstraction has 473 states and 1374 transitions. [2021-03-10 21:14:06,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:06,287 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1374 transitions. [2021-03-10 21:14:06,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:14:06,288 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:06,288 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:06,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-03-10 21:14:06,496 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:06,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:06,496 INFO L82 PathProgramCache]: Analyzing trace with hash 146508717, now seen corresponding path program 76 times [2021-03-10 21:14:06,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:06,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125573715] [2021-03-10 21:14:06,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:06,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:06,514 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:06,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125573715] [2021-03-10 21:14:06,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889801857] [2021-03-10 21:14:06,515 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:14:06,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:14:06,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:06,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:14:06,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:06,596 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:06,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:06,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-03-10 21:14:06,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620819787] [2021-03-10 21:14:06,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:14:06,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:06,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:14:06,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:14:06,597 INFO L87 Difference]: Start difference. First operand 473 states and 1374 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:06,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:06,841 INFO L93 Difference]: Finished difference Result 693 states and 1787 transitions. [2021-03-10 21:14:06,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:14:06,842 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:14:06,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:06,843 INFO L225 Difference]: With dead ends: 693 [2021-03-10 21:14:06,843 INFO L226 Difference]: Without dead ends: 687 [2021-03-10 21:14:06,843 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 209.8ms TimeCoverageRelationStatistics Valid=441, Invalid=891, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:14:06,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-03-10 21:14:06,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 463. [2021-03-10 21:14:06,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 2.8896103896103895) internal successors, (1335), 462 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:06,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1335 transitions. [2021-03-10 21:14:06,849 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1335 transitions. Word has length 18 [2021-03-10 21:14:06,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:06,849 INFO L480 AbstractCegarLoop]: Abstraction has 463 states and 1335 transitions. [2021-03-10 21:14:06,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:06,850 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1335 transitions. [2021-03-10 21:14:06,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:14:06,850 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:06,850 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:07,065 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:07,066 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:07,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:07,066 INFO L82 PathProgramCache]: Analyzing trace with hash 681738519, now seen corresponding path program 77 times [2021-03-10 21:14:07,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:07,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755991763] [2021-03-10 21:14:07,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:07,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:07,094 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:07,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755991763] [2021-03-10 21:14:07,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923067443] [2021-03-10 21:14:07,094 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:07,113 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:07,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:07,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:14:07,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:07,178 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:07,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:07,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-03-10 21:14:07,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789157644] [2021-03-10 21:14:07,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:14:07,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:07,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:14:07,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:14:07,179 INFO L87 Difference]: Start difference. First operand 463 states and 1335 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) [2021-03-10 21:14:07,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:07,429 INFO L93 Difference]: Finished difference Result 706 states and 1819 transitions. [2021-03-10 21:14:07,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:14:07,429 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 18 [2021-03-10 21:14:07,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:07,430 INFO L225 Difference]: With dead ends: 706 [2021-03-10 21:14:07,430 INFO L226 Difference]: Without dead ends: 694 [2021-03-10 21:14:07,431 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 225.0ms TimeCoverageRelationStatistics Valid=387, Invalid=873, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 21:14:07,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-03-10 21:14:07,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 476. [2021-03-10 21:14:07,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 2.903157894736842) internal successors, (1379), 475 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:07,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1379 transitions. [2021-03-10 21:14:07,437 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1379 transitions. Word has length 18 [2021-03-10 21:14:07,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:07,437 INFO L480 AbstractCegarLoop]: Abstraction has 476 states and 1379 transitions. [2021-03-10 21:14:07,437 INFO L481 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) [2021-03-10 21:14:07,437 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1379 transitions. [2021-03-10 21:14:07,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:14:07,438 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:07,438 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:07,638 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:07,638 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:07,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:07,638 INFO L82 PathProgramCache]: Analyzing trace with hash 93993197, now seen corresponding path program 78 times [2021-03-10 21:14:07,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:07,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225405178] [2021-03-10 21:14:07,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:07,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:07,665 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:07,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225405178] [2021-03-10 21:14:07,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25352079] [2021-03-10 21:14:07,666 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:07,682 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:14:07,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:07,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:14:07,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:07,744 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:07,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:07,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:14:07,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188551913] [2021-03-10 21:14:07,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:14:07,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:07,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:14:07,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:14:07,745 INFO L87 Difference]: Start difference. First operand 476 states and 1379 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) [2021-03-10 21:14:07,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:07,969 INFO L93 Difference]: Finished difference Result 674 states and 1783 transitions. [2021-03-10 21:14:07,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:14:07,969 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 18 [2021-03-10 21:14:07,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:07,970 INFO L225 Difference]: With dead ends: 674 [2021-03-10 21:14:07,970 INFO L226 Difference]: Without dead ends: 656 [2021-03-10 21:14:07,970 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 201.8ms TimeCoverageRelationStatistics Valid=364, Invalid=896, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 21:14:07,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2021-03-10 21:14:07,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 498. [2021-03-10 21:14:07,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 2.9014084507042255) internal successors, (1442), 497 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:07,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1442 transitions. [2021-03-10 21:14:07,976 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1442 transitions. Word has length 18 [2021-03-10 21:14:07,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:07,976 INFO L480 AbstractCegarLoop]: Abstraction has 498 states and 1442 transitions. [2021-03-10 21:14:07,976 INFO L481 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) [2021-03-10 21:14:07,976 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1442 transitions. [2021-03-10 21:14:07,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:14:07,977 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:07,977 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:08,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:08,178 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:08,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:08,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1452121605, now seen corresponding path program 79 times [2021-03-10 21:14:08,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:08,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82005432] [2021-03-10 21:14:08,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:08,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:08,262 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:08,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82005432] [2021-03-10 21:14:08,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126771893] [2021-03-10 21:14:08,262 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:08,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:08,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:14:08,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:08,354 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:08,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:08,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-03-10 21:14:08,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459248162] [2021-03-10 21:14:08,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:14:08,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:08,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:14:08,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:14:08,355 INFO L87 Difference]: Start difference. First operand 498 states and 1442 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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) [2021-03-10 21:14:08,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:08,560 INFO L93 Difference]: Finished difference Result 678 states and 1761 transitions. [2021-03-10 21:14:08,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:14:08,560 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:14:08,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:08,562 INFO L225 Difference]: With dead ends: 678 [2021-03-10 21:14:08,562 INFO L226 Difference]: Without dead ends: 655 [2021-03-10 21:14:08,562 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 190.1ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:14:08,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-03-10 21:14:08,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 531. [2021-03-10 21:14:08,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 2.8679245283018866) internal successors, (1520), 530 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:08,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1520 transitions. [2021-03-10 21:14:08,568 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1520 transitions. Word has length 19 [2021-03-10 21:14:08,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:08,568 INFO L480 AbstractCegarLoop]: Abstraction has 531 states and 1520 transitions. [2021-03-10 21:14:08,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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) [2021-03-10 21:14:08,568 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1520 transitions. [2021-03-10 21:14:08,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:14:08,569 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:08,569 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:08,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:08,784 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:08,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:08,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1378493247, now seen corresponding path program 80 times [2021-03-10 21:14:08,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:08,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139463613] [2021-03-10 21:14:08,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:08,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:08,861 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:08,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139463613] [2021-03-10 21:14:08,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079955891] [2021-03-10 21:14:08,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:14:08,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:08,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:08,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:14:08,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:08,962 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:08,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:08,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-03-10 21:14:08,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75583995] [2021-03-10 21:14:08,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:14:08,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:08,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:14:08,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:14:08,962 INFO L87 Difference]: Start difference. First operand 531 states and 1520 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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) [2021-03-10 21:14:09,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:09,101 INFO L93 Difference]: Finished difference Result 714 states and 1853 transitions. [2021-03-10 21:14:09,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:14:09,101 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:14:09,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:09,102 INFO L225 Difference]: With dead ends: 714 [2021-03-10 21:14:09,102 INFO L226 Difference]: Without dead ends: 707 [2021-03-10 21:14:09,102 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 146.1ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:14:09,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-03-10 21:14:09,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 555. [2021-03-10 21:14:09,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 2.895306859205776) internal successors, (1604), 554 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:09,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 1604 transitions. [2021-03-10 21:14:09,114 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 1604 transitions. Word has length 19 [2021-03-10 21:14:09,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:09,114 INFO L480 AbstractCegarLoop]: Abstraction has 555 states and 1604 transitions. [2021-03-10 21:14:09,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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) [2021-03-10 21:14:09,114 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 1604 transitions. [2021-03-10 21:14:09,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:14:09,115 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:09,115 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:09,329 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-03-10 21:14:09,329 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:09,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:09,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1301771325, now seen corresponding path program 81 times [2021-03-10 21:14:09,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:09,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365344002] [2021-03-10 21:14:09,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:09,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:09,439 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:09,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365344002] [2021-03-10 21:14:09,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872141675] [2021-03-10 21:14:09,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:14:09,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:14:09,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:09,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:14:09,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:09,545 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:09,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:09,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-03-10 21:14:09,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350112012] [2021-03-10 21:14:09,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:14:09,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:09,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:14:09,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:14:09,546 INFO L87 Difference]: Start difference. First operand 555 states and 1604 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:09,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:09,709 INFO L93 Difference]: Finished difference Result 700 states and 1833 transitions. [2021-03-10 21:14:09,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:14:09,710 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:14:09,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:09,711 INFO L225 Difference]: With dead ends: 700 [2021-03-10 21:14:09,711 INFO L226 Difference]: Without dead ends: 684 [2021-03-10 21:14:09,711 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 201.5ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:14:09,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-03-10 21:14:09,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 542. [2021-03-10 21:14:09,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 2.8927911275415896) internal successors, (1565), 541 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:09,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1565 transitions. [2021-03-10 21:14:09,726 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1565 transitions. Word has length 19 [2021-03-10 21:14:09,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:09,726 INFO L480 AbstractCegarLoop]: Abstraction has 542 states and 1565 transitions. [2021-03-10 21:14:09,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:09,726 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1565 transitions. [2021-03-10 21:14:09,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:14:09,727 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:09,727 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:09,935 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-03-10 21:14:09,935 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:09,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:09,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1949948053, now seen corresponding path program 82 times [2021-03-10 21:14:09,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:09,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147297969] [2021-03-10 21:14:09,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:09,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:10,003 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:10,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147297969] [2021-03-10 21:14:10,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768165502] [2021-03-10 21:14:10,004 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:10,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:14:10,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:10,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:14:10,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:10,111 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:10,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:10,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-03-10 21:14:10,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069879090] [2021-03-10 21:14:10,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:14:10,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:10,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:14:10,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:14:10,112 INFO L87 Difference]: Start difference. First operand 542 states and 1565 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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) [2021-03-10 21:14:10,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:10,298 INFO L93 Difference]: Finished difference Result 698 states and 1814 transitions. [2021-03-10 21:14:10,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:14:10,298 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:14:10,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:10,300 INFO L225 Difference]: With dead ends: 698 [2021-03-10 21:14:10,300 INFO L226 Difference]: Without dead ends: 691 [2021-03-10 21:14:10,300 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 167.3ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:14:10,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2021-03-10 21:14:10,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 542. [2021-03-10 21:14:10,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 2.8927911275415896) internal successors, (1565), 541 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:10,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1565 transitions. [2021-03-10 21:14:10,306 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1565 transitions. Word has length 19 [2021-03-10 21:14:10,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:10,306 INFO L480 AbstractCegarLoop]: Abstraction has 542 states and 1565 transitions. [2021-03-10 21:14:10,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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) [2021-03-10 21:14:10,306 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1565 transitions. [2021-03-10 21:14:10,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:14:10,307 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:10,307 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:10,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:10,507 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:10,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:10,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1809789441, now seen corresponding path program 83 times [2021-03-10 21:14:10,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:10,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819463937] [2021-03-10 21:14:10,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:10,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:10,590 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:10,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819463937] [2021-03-10 21:14:10,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191480891] [2021-03-10 21:14:10,591 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:10,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:14:10,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:10,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:14:10,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:10,682 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:10,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:10,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-03-10 21:14:10,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706560183] [2021-03-10 21:14:10,682 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:14:10,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:10,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:14:10,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:14:10,683 INFO L87 Difference]: Start difference. First operand 542 states and 1565 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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) [2021-03-10 21:14:10,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:10,877 INFO L93 Difference]: Finished difference Result 664 states and 1755 transitions. [2021-03-10 21:14:10,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:14:10,878 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:14:10,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:10,879 INFO L225 Difference]: With dead ends: 664 [2021-03-10 21:14:10,879 INFO L226 Difference]: Without dead ends: 657 [2021-03-10 21:14:10,879 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 170.6ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:14:10,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-03-10 21:14:10,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 542. [2021-03-10 21:14:10,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 2.8927911275415896) internal successors, (1565), 541 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:10,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1565 transitions. [2021-03-10 21:14:10,885 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1565 transitions. Word has length 19 [2021-03-10 21:14:10,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:10,885 INFO L480 AbstractCegarLoop]: Abstraction has 542 states and 1565 transitions. [2021-03-10 21:14:10,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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) [2021-03-10 21:14:10,885 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1565 transitions. [2021-03-10 21:14:10,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:14:10,885 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:10,886 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:11,086 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-03-10 21:14:11,086 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:11,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:11,086 INFO L82 PathProgramCache]: Analyzing trace with hash -310264069, now seen corresponding path program 84 times [2021-03-10 21:14:11,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:11,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066926720] [2021-03-10 21:14:11,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:11,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:11,161 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:11,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066926720] [2021-03-10 21:14:11,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796169006] [2021-03-10 21:14:11,161 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:14:11,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:14:11,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:11,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:14:11,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:11,274 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:11,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:11,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-03-10 21:14:11,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252428350] [2021-03-10 21:14:11,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:14:11,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:11,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:14:11,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:14:11,274 INFO L87 Difference]: Start difference. First operand 542 states and 1565 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:11,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:11,383 INFO L93 Difference]: Finished difference Result 660 states and 1787 transitions. [2021-03-10 21:14:11,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:14:11,383 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:14:11,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:11,384 INFO L225 Difference]: With dead ends: 660 [2021-03-10 21:14:11,384 INFO L226 Difference]: Without dead ends: 653 [2021-03-10 21:14:11,384 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 146.8ms TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:14:11,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2021-03-10 21:14:11,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 555. [2021-03-10 21:14:11,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 2.9097472924187726) internal successors, (1612), 554 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:11,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 1612 transitions. [2021-03-10 21:14:11,390 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 1612 transitions. Word has length 19 [2021-03-10 21:14:11,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:11,390 INFO L480 AbstractCegarLoop]: Abstraction has 555 states and 1612 transitions. [2021-03-10 21:14:11,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:11,390 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 1612 transitions. [2021-03-10 21:14:11,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:14:11,391 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:11,391 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:11,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-03-10 21:14:11,591 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:11,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:11,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1304438655, now seen corresponding path program 85 times [2021-03-10 21:14:11,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:11,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908342356] [2021-03-10 21:14:11,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:11,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:11,672 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:11,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908342356] [2021-03-10 21:14:11,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491604176] [2021-03-10 21:14:11,672 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:11,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:11,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:14:11,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:11,769 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:11,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:11,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-03-10 21:14:11,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100957313] [2021-03-10 21:14:11,769 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:14:11,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:11,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:14:11,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:14:11,770 INFO L87 Difference]: Start difference. First operand 555 states and 1612 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 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) [2021-03-10 21:14:11,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:11,895 INFO L93 Difference]: Finished difference Result 661 states and 1784 transitions. [2021-03-10 21:14:11,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:14:11,895 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 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 [2021-03-10 21:14:11,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:11,896 INFO L225 Difference]: With dead ends: 661 [2021-03-10 21:14:11,896 INFO L226 Difference]: Without dead ends: 652 [2021-03-10 21:14:11,896 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 148.5ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:14:11,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-03-10 21:14:11,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 555. [2021-03-10 21:14:11,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 2.904332129963899) internal successors, (1609), 554 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:11,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 1609 transitions. [2021-03-10 21:14:11,903 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 1609 transitions. Word has length 19 [2021-03-10 21:14:11,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:11,903 INFO L480 AbstractCegarLoop]: Abstraction has 555 states and 1609 transitions. [2021-03-10 21:14:11,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 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) [2021-03-10 21:14:11,903 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 1609 transitions. [2021-03-10 21:14:11,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:14:11,904 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:11,904 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:12,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:12,119 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:12,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:12,119 INFO L82 PathProgramCache]: Analyzing trace with hash -774855173, now seen corresponding path program 86 times [2021-03-10 21:14:12,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:12,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788050731] [2021-03-10 21:14:12,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:12,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:12,192 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:12,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788050731] [2021-03-10 21:14:12,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151203822] [2021-03-10 21:14:12,193 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 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 [2021-03-10 21:14:12,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:12,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:12,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:14:12,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:12,309 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:12,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:12,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-03-10 21:14:12,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210460939] [2021-03-10 21:14:12,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:14:12,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:12,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:14:12,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:14:12,310 INFO L87 Difference]: Start difference. First operand 555 states and 1609 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 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) [2021-03-10 21:14:12,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:12,453 INFO L93 Difference]: Finished difference Result 635 states and 1737 transitions. [2021-03-10 21:14:12,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:14:12,453 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 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 [2021-03-10 21:14:12,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:12,454 INFO L225 Difference]: With dead ends: 635 [2021-03-10 21:14:12,454 INFO L226 Difference]: Without dead ends: 628 [2021-03-10 21:14:12,454 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 158.5ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:14:12,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-03-10 21:14:12,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 555. [2021-03-10 21:14:12,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 2.904332129963899) internal successors, (1609), 554 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:12,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 1609 transitions. [2021-03-10 21:14:12,460 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 1609 transitions. Word has length 19 [2021-03-10 21:14:12,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:12,460 INFO L480 AbstractCegarLoop]: Abstraction has 555 states and 1609 transitions. [2021-03-10 21:14:12,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 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) [2021-03-10 21:14:12,460 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 1609 transitions. [2021-03-10 21:14:12,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:14:12,461 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:12,461 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:12,675 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:12,675 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:12,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:12,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1122133313, now seen corresponding path program 87 times [2021-03-10 21:14:12,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:12,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743021956] [2021-03-10 21:14:12,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:12,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:12,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:12,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743021956] [2021-03-10 21:14:12,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85366116] [2021-03-10 21:14:12,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:12,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:14:12,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:12,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:14:12,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:12,888 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:12,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:12,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-03-10 21:14:12,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081937334] [2021-03-10 21:14:12,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:14:12,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:12,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:14:12,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:14:12,889 INFO L87 Difference]: Start difference. First operand 555 states and 1609 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 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) [2021-03-10 21:14:13,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:13,091 INFO L93 Difference]: Finished difference Result 776 states and 2043 transitions. [2021-03-10 21:14:13,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:14:13,091 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 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 [2021-03-10 21:14:13,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:13,092 INFO L225 Difference]: With dead ends: 776 [2021-03-10 21:14:13,092 INFO L226 Difference]: Without dead ends: 759 [2021-03-10 21:14:13,092 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 202.3ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:14:13,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-03-10 21:14:13,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 594. [2021-03-10 21:14:13,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 593 states have (on average 2.9409780775716694) internal successors, (1744), 593 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:13,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 1744 transitions. [2021-03-10 21:14:13,099 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 1744 transitions. Word has length 19 [2021-03-10 21:14:13,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:13,099 INFO L480 AbstractCegarLoop]: Abstraction has 594 states and 1744 transitions. [2021-03-10 21:14:13,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 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) [2021-03-10 21:14:13,099 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 1744 transitions. [2021-03-10 21:14:13,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:14:13,100 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:13,100 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:13,314 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-03-10 21:14:13,315 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:13,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:13,315 INFO L82 PathProgramCache]: Analyzing trace with hash 492569411, now seen corresponding path program 88 times [2021-03-10 21:14:13,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:13,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654337277] [2021-03-10 21:14:13,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:13,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:13,414 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:13,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654337277] [2021-03-10 21:14:13,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104869630] [2021-03-10 21:14:13,414 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:14:13,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:14:13,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:13,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:14:13,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:13,533 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:13,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:13,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-03-10 21:14:13,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796126818] [2021-03-10 21:14:13,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:14:13,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:13,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:14:13,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:14:13,534 INFO L87 Difference]: Start difference. First operand 594 states and 1744 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 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) [2021-03-10 21:14:13,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:13,705 INFO L93 Difference]: Finished difference Result 774 states and 2026 transitions. [2021-03-10 21:14:13,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:14:13,705 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 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 19 [2021-03-10 21:14:13,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:13,706 INFO L225 Difference]: With dead ends: 774 [2021-03-10 21:14:13,706 INFO L226 Difference]: Without dead ends: 756 [2021-03-10 21:14:13,706 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 196.1ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:14:13,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-03-10 21:14:13,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 583. [2021-03-10 21:14:13,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 2.922680412371134) internal successors, (1701), 582 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:13,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1701 transitions. [2021-03-10 21:14:13,713 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1701 transitions. Word has length 19 [2021-03-10 21:14:13,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:13,713 INFO L480 AbstractCegarLoop]: Abstraction has 583 states and 1701 transitions. [2021-03-10 21:14:13,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 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) [2021-03-10 21:14:13,713 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1701 transitions. [2021-03-10 21:14:13,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:14:13,713 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:13,713 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:13,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-03-10 21:14:13,931 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:13,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:13,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1586724417, now seen corresponding path program 89 times [2021-03-10 21:14:13,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:13,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520220172] [2021-03-10 21:14:13,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:13,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:14,005 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:14,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520220172] [2021-03-10 21:14:14,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600593309] [2021-03-10 21:14:14,005 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:14,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:14:14,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:14,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:14:14,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:14,120 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:14,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:14,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-03-10 21:14:14,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927059361] [2021-03-10 21:14:14,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:14:14,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:14,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:14:14,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:14:14,121 INFO L87 Difference]: Start difference. First operand 583 states and 1701 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:14,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:14,334 INFO L93 Difference]: Finished difference Result 744 states and 1952 transitions. [2021-03-10 21:14:14,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:14:14,334 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:14:14,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:14,335 INFO L225 Difference]: With dead ends: 744 [2021-03-10 21:14:14,335 INFO L226 Difference]: Without dead ends: 722 [2021-03-10 21:14:14,335 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 189.3ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:14:14,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2021-03-10 21:14:14,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 580. [2021-03-10 21:14:14,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 579 states have (on average 2.9153713298791017) internal successors, (1688), 579 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:14,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 1688 transitions. [2021-03-10 21:14:14,342 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 1688 transitions. Word has length 19 [2021-03-10 21:14:14,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:14,342 INFO L480 AbstractCegarLoop]: Abstraction has 580 states and 1688 transitions. [2021-03-10 21:14:14,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:14,342 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 1688 transitions. [2021-03-10 21:14:14,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:14:14,342 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:14,342 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:14,551 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:14,551 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:14,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:14,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1620323645, now seen corresponding path program 90 times [2021-03-10 21:14:14,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:14,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755753677] [2021-03-10 21:14:14,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:14,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:14,625 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:14,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755753677] [2021-03-10 21:14:14,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534628149] [2021-03-10 21:14:14,625 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:14,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:14:14,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:14,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:14:14,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:14,756 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:14,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:14,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-03-10 21:14:14,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443922104] [2021-03-10 21:14:14,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:14:14,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:14,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:14:14,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:14:14,757 INFO L87 Difference]: Start difference. First operand 580 states and 1688 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:14,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:14,926 INFO L93 Difference]: Finished difference Result 695 states and 1864 transitions. [2021-03-10 21:14:14,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:14:14,926 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:14:14,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:14,927 INFO L225 Difference]: With dead ends: 695 [2021-03-10 21:14:14,927 INFO L226 Difference]: Without dead ends: 688 [2021-03-10 21:14:14,927 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 161.0ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:14:14,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-03-10 21:14:14,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 582. [2021-03-10 21:14:14,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 581 states have (on average 2.910499139414802) internal successors, (1691), 581 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:14,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 1691 transitions. [2021-03-10 21:14:14,933 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 1691 transitions. Word has length 19 [2021-03-10 21:14:14,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:14,933 INFO L480 AbstractCegarLoop]: Abstraction has 582 states and 1691 transitions. [2021-03-10 21:14:14,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:14,933 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 1691 transitions. [2021-03-10 21:14:14,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:14:14,934 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:14,934 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:15,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:15,147 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:15,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:15,147 INFO L82 PathProgramCache]: Analyzing trace with hash -592690923, now seen corresponding path program 91 times [2021-03-10 21:14:15,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:15,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574348749] [2021-03-10 21:14:15,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:15,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:15,223 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:15,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574348749] [2021-03-10 21:14:15,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209452048] [2021-03-10 21:14:15,223 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:15,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:15,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:14:15,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:15,317 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:15,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:15,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-03-10 21:14:15,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976166667] [2021-03-10 21:14:15,318 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:14:15,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:15,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:14:15,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:14:15,318 INFO L87 Difference]: Start difference. First operand 582 states and 1691 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:15,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:15,427 INFO L93 Difference]: Finished difference Result 647 states and 1795 transitions. [2021-03-10 21:14:15,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:14:15,428 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:14:15,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:15,429 INFO L225 Difference]: With dead ends: 647 [2021-03-10 21:14:15,429 INFO L226 Difference]: Without dead ends: 634 [2021-03-10 21:14:15,429 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 138.8ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:14:15,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-03-10 21:14:15,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 577. [2021-03-10 21:14:15,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 2.907986111111111) internal successors, (1675), 576 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:15,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 1675 transitions. [2021-03-10 21:14:15,442 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 1675 transitions. Word has length 19 [2021-03-10 21:14:15,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:15,442 INFO L480 AbstractCegarLoop]: Abstraction has 577 states and 1675 transitions. [2021-03-10 21:14:15,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:15,442 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 1675 transitions. [2021-03-10 21:14:15,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:14:15,443 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:15,443 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:15,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-03-10 21:14:15,658 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:15,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:15,658 INFO L82 PathProgramCache]: Analyzing trace with hash -520276101, now seen corresponding path program 92 times [2021-03-10 21:14:15,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:15,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776056197] [2021-03-10 21:14:15,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:15,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:15,739 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:15,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776056197] [2021-03-10 21:14:15,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749269487] [2021-03-10 21:14:15,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:14:15,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:15,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:15,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:14:15,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:15,839 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:15,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:15,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-03-10 21:14:15,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940984375] [2021-03-10 21:14:15,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:14:15,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:15,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:14:15,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:14:15,840 INFO L87 Difference]: Start difference. First operand 577 states and 1675 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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) [2021-03-10 21:14:16,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:16,035 INFO L93 Difference]: Finished difference Result 798 states and 2119 transitions. [2021-03-10 21:14:16,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:14:16,036 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:14:16,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:16,037 INFO L225 Difference]: With dead ends: 798 [2021-03-10 21:14:16,037 INFO L226 Difference]: Without dead ends: 781 [2021-03-10 21:14:16,037 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 176.9ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:14:16,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2021-03-10 21:14:16,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 632. [2021-03-10 21:14:16,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 631 states have (on average 2.9334389857369256) internal successors, (1851), 631 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:16,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 1851 transitions. [2021-03-10 21:14:16,044 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 1851 transitions. Word has length 19 [2021-03-10 21:14:16,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:16,044 INFO L480 AbstractCegarLoop]: Abstraction has 632 states and 1851 transitions. [2021-03-10 21:14:16,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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) [2021-03-10 21:14:16,044 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 1851 transitions. [2021-03-10 21:14:16,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:14:16,045 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:16,045 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:16,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:16,260 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:16,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:16,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1094426623, now seen corresponding path program 93 times [2021-03-10 21:14:16,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:16,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351434128] [2021-03-10 21:14:16,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:16,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:16,341 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:16,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351434128] [2021-03-10 21:14:16,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345188864] [2021-03-10 21:14:16,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:14:16,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:14:16,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:16,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:14:16,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:16,444 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:16,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:16,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-03-10 21:14:16,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419636129] [2021-03-10 21:14:16,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:14:16,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:16,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:14:16,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:14:16,445 INFO L87 Difference]: Start difference. First operand 632 states and 1851 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:16,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:16,633 INFO L93 Difference]: Finished difference Result 796 states and 2104 transitions. [2021-03-10 21:14:16,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:14:16,633 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:14:16,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:16,635 INFO L225 Difference]: With dead ends: 796 [2021-03-10 21:14:16,635 INFO L226 Difference]: Without dead ends: 780 [2021-03-10 21:14:16,635 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 176.2ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:14:16,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2021-03-10 21:14:16,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 621. [2021-03-10 21:14:16,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 620 states have (on average 2.92258064516129) internal successors, (1812), 620 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:16,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 1812 transitions. [2021-03-10 21:14:16,642 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 1812 transitions. Word has length 19 [2021-03-10 21:14:16,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:16,642 INFO L480 AbstractCegarLoop]: Abstraction has 621 states and 1812 transitions. [2021-03-10 21:14:16,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:16,642 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 1812 transitions. [2021-03-10 21:14:16,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:14:16,642 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:16,643 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:16,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:16,856 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:16,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:16,856 INFO L82 PathProgramCache]: Analyzing trace with hash -984867205, now seen corresponding path program 94 times [2021-03-10 21:14:16,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:16,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315610665] [2021-03-10 21:14:16,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:16,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:16,926 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:16,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315610665] [2021-03-10 21:14:16,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946321607] [2021-03-10 21:14:16,927 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:16,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:14:16,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:16,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:14:16,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:17,033 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:17,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:17,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-03-10 21:14:17,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213142746] [2021-03-10 21:14:17,033 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:14:17,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:17,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:14:17,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:14:17,033 INFO L87 Difference]: Start difference. First operand 621 states and 1812 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:17,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:17,243 INFO L93 Difference]: Finished difference Result 809 states and 2103 transitions. [2021-03-10 21:14:17,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:14:17,244 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:14:17,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:17,245 INFO L225 Difference]: With dead ends: 809 [2021-03-10 21:14:17,245 INFO L226 Difference]: Without dead ends: 791 [2021-03-10 21:14:17,245 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 181.7ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:14:17,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2021-03-10 21:14:17,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 614. [2021-03-10 21:14:17,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 2.911908646003263) internal successors, (1785), 613 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:17,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1785 transitions. [2021-03-10 21:14:17,252 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1785 transitions. Word has length 19 [2021-03-10 21:14:17,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:17,252 INFO L480 AbstractCegarLoop]: Abstraction has 614 states and 1785 transitions. [2021-03-10 21:14:17,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:17,252 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1785 transitions. [2021-03-10 21:14:17,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:14:17,253 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:17,253 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:17,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-03-10 21:14:17,453 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:17,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:17,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1018466433, now seen corresponding path program 95 times [2021-03-10 21:14:17,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:17,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640213111] [2021-03-10 21:14:17,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:17,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:17,543 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:17,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640213111] [2021-03-10 21:14:17,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528453107] [2021-03-10 21:14:17,544 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:14:17,563 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:14:17,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:17,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:14:17,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:17,655 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:17,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:17,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-03-10 21:14:17,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170330975] [2021-03-10 21:14:17,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:14:17,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:17,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:14:17,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:14:17,656 INFO L87 Difference]: Start difference. First operand 614 states and 1785 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:17,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:17,893 INFO L93 Difference]: Finished difference Result 764 states and 2018 transitions. [2021-03-10 21:14:17,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:14:17,893 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:14:17,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:17,894 INFO L225 Difference]: With dead ends: 764 [2021-03-10 21:14:17,894 INFO L226 Difference]: Without dead ends: 744 [2021-03-10 21:14:17,895 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 215.0ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:14:17,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-03-10 21:14:17,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 607. [2021-03-10 21:14:17,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 606 states have (on average 2.9141914191419143) internal successors, (1766), 606 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:17,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 1766 transitions. [2021-03-10 21:14:17,901 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 1766 transitions. Word has length 19 [2021-03-10 21:14:17,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:17,901 INFO L480 AbstractCegarLoop]: Abstraction has 607 states and 1766 transitions. [2021-03-10 21:14:17,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:17,901 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 1766 transitions. [2021-03-10 21:14:17,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:14:17,902 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:17,902 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:18,115 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:18,115 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:18,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:18,115 INFO L82 PathProgramCache]: Analyzing trace with hash -2060042501, now seen corresponding path program 96 times [2021-03-10 21:14:18,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:18,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775488261] [2021-03-10 21:14:18,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:18,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:18,199 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:18,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775488261] [2021-03-10 21:14:18,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013814498] [2021-03-10 21:14:18,200 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 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 [2021-03-10 21:14:18,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:14:18,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:18,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:14:18,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:18,310 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:18,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:18,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-03-10 21:14:18,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121402113] [2021-03-10 21:14:18,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:14:18,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:18,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:14:18,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:14:18,310 INFO L87 Difference]: Start difference. First operand 607 states and 1766 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:18,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:18,533 INFO L93 Difference]: Finished difference Result 713 states and 1927 transitions. [2021-03-10 21:14:18,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:14:18,534 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:14:18,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:18,535 INFO L225 Difference]: With dead ends: 713 [2021-03-10 21:14:18,535 INFO L226 Difference]: Without dead ends: 706 [2021-03-10 21:14:18,535 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 194.7ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:14:18,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-03-10 21:14:18,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 615. [2021-03-10 21:14:18,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 614 states have (on average 2.8957654723127035) internal successors, (1778), 614 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:18,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 1778 transitions. [2021-03-10 21:14:18,542 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 1778 transitions. Word has length 19 [2021-03-10 21:14:18,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:18,542 INFO L480 AbstractCegarLoop]: Abstraction has 615 states and 1778 transitions. [2021-03-10 21:14:18,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:18,542 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 1778 transitions. [2021-03-10 21:14:18,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:14:18,542 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:18,543 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:18,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-03-10 21:14:18,743 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:18,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:18,743 INFO L82 PathProgramCache]: Analyzing trace with hash 323509763, now seen corresponding path program 97 times [2021-03-10 21:14:18,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:18,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622021388] [2021-03-10 21:14:18,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:18,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:18,823 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:18,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622021388] [2021-03-10 21:14:18,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524384178] [2021-03-10 21:14:18,823 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:18,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:18,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:14:18,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:18,929 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:18,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:18,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-03-10 21:14:18,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207367351] [2021-03-10 21:14:18,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:14:18,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:18,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:14:18,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:14:18,929 INFO L87 Difference]: Start difference. First operand 615 states and 1778 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:19,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:19,061 INFO L93 Difference]: Finished difference Result 753 states and 2034 transitions. [2021-03-10 21:14:19,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:14:19,062 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:14:19,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:19,063 INFO L225 Difference]: With dead ends: 753 [2021-03-10 21:14:19,063 INFO L226 Difference]: Without dead ends: 743 [2021-03-10 21:14:19,063 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 155.5ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:14:19,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2021-03-10 21:14:19,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 627. [2021-03-10 21:14:19,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 626 states have (on average 2.905750798722045) internal successors, (1819), 626 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:19,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 1819 transitions. [2021-03-10 21:14:19,070 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 1819 transitions. Word has length 19 [2021-03-10 21:14:19,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:19,070 INFO L480 AbstractCegarLoop]: Abstraction has 627 states and 1819 transitions. [2021-03-10 21:14:19,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:19,070 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 1819 transitions. [2021-03-10 21:14:19,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:14:19,070 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:19,070 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:19,283 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:19,283 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:19,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:19,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1938212487, now seen corresponding path program 98 times [2021-03-10 21:14:19,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:19,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308829320] [2021-03-10 21:14:19,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:19,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:19,357 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:19,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308829320] [2021-03-10 21:14:19,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641575442] [2021-03-10 21:14:19,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:19,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:19,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:19,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:14:19,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:19,459 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:19,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:19,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-03-10 21:14:19,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232130471] [2021-03-10 21:14:19,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:14:19,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:19,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:14:19,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:14:19,460 INFO L87 Difference]: Start difference. First operand 627 states and 1819 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:19,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:19,572 INFO L93 Difference]: Finished difference Result 735 states and 2000 transitions. [2021-03-10 21:14:19,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:14:19,572 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:14:19,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:19,573 INFO L225 Difference]: With dead ends: 735 [2021-03-10 21:14:19,573 INFO L226 Difference]: Without dead ends: 728 [2021-03-10 21:14:19,573 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 141.3ms TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:14:19,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-03-10 21:14:19,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 625. [2021-03-10 21:14:19,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 2.90224358974359) internal successors, (1811), 624 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:19,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1811 transitions. [2021-03-10 21:14:19,580 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1811 transitions. Word has length 19 [2021-03-10 21:14:19,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:19,580 INFO L480 AbstractCegarLoop]: Abstraction has 625 states and 1811 transitions. [2021-03-10 21:14:19,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:19,580 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1811 transitions. [2021-03-10 21:14:19,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:14:19,580 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:19,581 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:19,795 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-03-10 21:14:19,795 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:19,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:19,795 INFO L82 PathProgramCache]: Analyzing trace with hash 894964569, now seen corresponding path program 99 times [2021-03-10 21:14:19,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:19,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914814650] [2021-03-10 21:14:19,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:19,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:19,879 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:19,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914814650] [2021-03-10 21:14:19,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860832359] [2021-03-10 21:14:19,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:19,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:14:19,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:19,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:14:19,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:19,983 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:19,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:19,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-03-10 21:14:19,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343357580] [2021-03-10 21:14:19,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:14:19,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:19,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:14:19,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:14:19,984 INFO L87 Difference]: Start difference. First operand 625 states and 1811 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:20,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:20,138 INFO L93 Difference]: Finished difference Result 709 states and 1948 transitions. [2021-03-10 21:14:20,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:14:20,138 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:14:20,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:20,139 INFO L225 Difference]: With dead ends: 709 [2021-03-10 21:14:20,139 INFO L226 Difference]: Without dead ends: 702 [2021-03-10 21:14:20,140 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 183.3ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:14:20,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-03-10 21:14:20,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 624. [2021-03-10 21:14:20,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 623 states have (on average 2.9020866773675764) internal successors, (1808), 623 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:20,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 1808 transitions. [2021-03-10 21:14:20,145 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 1808 transitions. Word has length 19 [2021-03-10 21:14:20,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:20,146 INFO L480 AbstractCegarLoop]: Abstraction has 624 states and 1808 transitions. [2021-03-10 21:14:20,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:20,146 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 1808 transitions. [2021-03-10 21:14:20,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:14:20,146 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:20,146 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:20,346 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:20,347 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:20,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:20,347 INFO L82 PathProgramCache]: Analyzing trace with hash 711067771, now seen corresponding path program 100 times [2021-03-10 21:14:20,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:20,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883102723] [2021-03-10 21:14:20,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:20,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:20,431 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:20,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883102723] [2021-03-10 21:14:20,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770440723] [2021-03-10 21:14:20,432 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:20,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:14:20,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:20,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:14:20,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:20,537 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:20,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:20,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-03-10 21:14:20,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295386994] [2021-03-10 21:14:20,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:14:20,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:20,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:14:20,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:14:20,538 INFO L87 Difference]: Start difference. First operand 624 states and 1808 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:20,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:20,679 INFO L93 Difference]: Finished difference Result 809 states and 2160 transitions. [2021-03-10 21:14:20,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:20,679 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:14:20,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:20,680 INFO L225 Difference]: With dead ends: 809 [2021-03-10 21:14:20,680 INFO L226 Difference]: Without dead ends: 799 [2021-03-10 21:14:20,680 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 164.6ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:14:20,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2021-03-10 21:14:20,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 644. [2021-03-10 21:14:20,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 643 states have (on average 2.9175738724727838) internal successors, (1876), 643 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:20,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 1876 transitions. [2021-03-10 21:14:20,687 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 1876 transitions. Word has length 19 [2021-03-10 21:14:20,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:20,687 INFO L480 AbstractCegarLoop]: Abstraction has 644 states and 1876 transitions. [2021-03-10 21:14:20,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:20,687 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 1876 transitions. [2021-03-10 21:14:20,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:14:20,688 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:20,688 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:20,888 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:20,888 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:20,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:20,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1969196801, now seen corresponding path program 101 times [2021-03-10 21:14:20,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:20,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895844017] [2021-03-10 21:14:20,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:20,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:20,970 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:20,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895844017] [2021-03-10 21:14:20,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654764616] [2021-03-10 21:14:20,970 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:14:20,991 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:14:20,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:20,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:14:20,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:21,073 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:21,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:21,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-03-10 21:14:21,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277363342] [2021-03-10 21:14:21,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:14:21,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:21,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:14:21,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:14:21,074 INFO L87 Difference]: Start difference. First operand 644 states and 1876 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:21,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:21,222 INFO L93 Difference]: Finished difference Result 793 states and 2130 transitions. [2021-03-10 21:14:21,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:21,223 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:14:21,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:21,224 INFO L225 Difference]: With dead ends: 793 [2021-03-10 21:14:21,224 INFO L226 Difference]: Without dead ends: 786 [2021-03-10 21:14:21,224 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 155.9ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:14:21,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2021-03-10 21:14:21,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 640. [2021-03-10 21:14:21,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 2.9139280125195617) internal successors, (1862), 639 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:21,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 1862 transitions. [2021-03-10 21:14:21,231 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 1862 transitions. Word has length 19 [2021-03-10 21:14:21,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:21,231 INFO L480 AbstractCegarLoop]: Abstraction has 640 states and 1862 transitions. [2021-03-10 21:14:21,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:21,231 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 1862 transitions. [2021-03-10 21:14:21,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:14:21,231 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:21,231 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:21,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2021-03-10 21:14:21,432 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:21,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:21,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1282522577, now seen corresponding path program 102 times [2021-03-10 21:14:21,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:21,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488527850] [2021-03-10 21:14:21,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:21,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:21,514 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:21,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488527850] [2021-03-10 21:14:21,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665580211] [2021-03-10 21:14:21,514 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:21,533 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:14:21,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:21,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:14:21,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:21,610 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:21,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:21,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-03-10 21:14:21,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517989397] [2021-03-10 21:14:21,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:14:21,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:21,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:14:21,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:14:21,611 INFO L87 Difference]: Start difference. First operand 640 states and 1862 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:21,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:21,773 INFO L93 Difference]: Finished difference Result 788 states and 2114 transitions. [2021-03-10 21:14:21,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:14:21,774 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:14:21,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:21,775 INFO L225 Difference]: With dead ends: 788 [2021-03-10 21:14:21,775 INFO L226 Difference]: Without dead ends: 775 [2021-03-10 21:14:21,775 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 167.4ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:14:21,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2021-03-10 21:14:21,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 638. [2021-03-10 21:14:21,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 637 states have (on average 2.9089481946624804) internal successors, (1853), 637 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:21,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1853 transitions. [2021-03-10 21:14:21,783 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1853 transitions. Word has length 19 [2021-03-10 21:14:21,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:21,783 INFO L480 AbstractCegarLoop]: Abstraction has 638 states and 1853 transitions. [2021-03-10 21:14:21,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:21,783 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1853 transitions. [2021-03-10 21:14:21,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:14:21,784 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:21,784 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:21,998 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-03-10 21:14:21,998 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:21,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:21,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1817752379, now seen corresponding path program 103 times [2021-03-10 21:14:21,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:21,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739394584] [2021-03-10 21:14:21,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:22,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:22,073 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:22,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739394584] [2021-03-10 21:14:22,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927043814] [2021-03-10 21:14:22,074 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:22,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:22,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:14:22,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:22,164 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:22,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:22,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-03-10 21:14:22,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730022347] [2021-03-10 21:14:22,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:14:22,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:22,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:14:22,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:14:22,165 INFO L87 Difference]: Start difference. First operand 638 states and 1853 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:22,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:22,330 INFO L93 Difference]: Finished difference Result 748 states and 2031 transitions. [2021-03-10 21:14:22,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:14:22,330 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:14:22,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:22,331 INFO L225 Difference]: With dead ends: 748 [2021-03-10 21:14:22,331 INFO L226 Difference]: Without dead ends: 741 [2021-03-10 21:14:22,332 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 158.1ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:14:22,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-03-10 21:14:22,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 636. [2021-03-10 21:14:22,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 2.9086614173228345) internal successors, (1847), 635 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:22,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1847 transitions. [2021-03-10 21:14:22,338 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1847 transitions. Word has length 19 [2021-03-10 21:14:22,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:22,338 INFO L480 AbstractCegarLoop]: Abstraction has 636 states and 1847 transitions. [2021-03-10 21:14:22,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:22,338 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1847 transitions. [2021-03-10 21:14:22,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:22,338 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:22,339 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:22,553 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:22,553 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:22,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:22,554 INFO L82 PathProgramCache]: Analyzing trace with hash -2039469541, now seen corresponding path program 104 times [2021-03-10 21:14:22,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:22,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862497327] [2021-03-10 21:14:22,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:22,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:22,594 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:22,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862497327] [2021-03-10 21:14:22,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028382371] [2021-03-10 21:14:22,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:22,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:22,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:22,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:22,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:22,677 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:22,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:22,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-03-10 21:14:22,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975937453] [2021-03-10 21:14:22,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:14:22,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:22,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:14:22,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:14:22,678 INFO L87 Difference]: Start difference. First operand 636 states and 1847 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) [2021-03-10 21:14:22,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:22,768 INFO L93 Difference]: Finished difference Result 972 states and 2745 transitions. [2021-03-10 21:14:22,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:14:22,768 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 20 [2021-03-10 21:14:22,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:22,769 INFO L225 Difference]: With dead ends: 972 [2021-03-10 21:14:22,769 INFO L226 Difference]: Without dead ends: 955 [2021-03-10 21:14:22,770 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 120.7ms TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:14:22,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2021-03-10 21:14:22,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 631. [2021-03-10 21:14:22,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 630 states have (on average 2.9158730158730157) internal successors, (1837), 630 states have internal predecessors, (1837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:22,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 1837 transitions. [2021-03-10 21:14:22,777 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 1837 transitions. Word has length 20 [2021-03-10 21:14:22,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:22,777 INFO L480 AbstractCegarLoop]: Abstraction has 631 states and 1837 transitions. [2021-03-10 21:14:22,777 INFO L481 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) [2021-03-10 21:14:22,777 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 1837 transitions. [2021-03-10 21:14:22,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:22,778 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:22,778 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:22,983 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:22,983 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:22,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:22,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1555544053, now seen corresponding path program 105 times [2021-03-10 21:14:22,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:22,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74591870] [2021-03-10 21:14:22,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:22,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:23,017 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:23,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74591870] [2021-03-10 21:14:23,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594207616] [2021-03-10 21:14:23,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:23,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:14:23,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:23,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:23,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:23,127 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:23,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:23,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-03-10 21:14:23,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642491697] [2021-03-10 21:14:23,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:14:23,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:23,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:14:23,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:14:23,128 INFO L87 Difference]: Start difference. First operand 631 states and 1837 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) [2021-03-10 21:14:23,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:23,250 INFO L93 Difference]: Finished difference Result 996 states and 2821 transitions. [2021-03-10 21:14:23,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:23,250 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 20 [2021-03-10 21:14:23,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:23,252 INFO L225 Difference]: With dead ends: 996 [2021-03-10 21:14:23,252 INFO L226 Difference]: Without dead ends: 996 [2021-03-10 21:14:23,252 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 91.8ms TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:14:23,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2021-03-10 21:14:23,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 650. [2021-03-10 21:14:23,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 2.9183359013867487) internal successors, (1894), 649 states have internal predecessors, (1894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:23,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1894 transitions. [2021-03-10 21:14:23,260 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1894 transitions. Word has length 20 [2021-03-10 21:14:23,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:23,260 INFO L480 AbstractCegarLoop]: Abstraction has 650 states and 1894 transitions. [2021-03-10 21:14:23,260 INFO L481 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) [2021-03-10 21:14:23,260 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1894 transitions. [2021-03-10 21:14:23,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:23,263 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:23,264 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:23,471 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:23,471 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:23,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:23,471 INFO L82 PathProgramCache]: Analyzing trace with hash 946430223, now seen corresponding path program 106 times [2021-03-10 21:14:23,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:23,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058941497] [2021-03-10 21:14:23,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:23,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:23,508 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:23,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058941497] [2021-03-10 21:14:23,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705852320] [2021-03-10 21:14:23,508 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:23,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:14:23,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:23,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:23,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:23,602 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:23,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:23,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 21:14:23,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204550860] [2021-03-10 21:14:23,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:14:23,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:23,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:14:23,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:14:23,603 INFO L87 Difference]: Start difference. First operand 650 states and 1894 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:23,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:23,876 INFO L93 Difference]: Finished difference Result 1332 states and 3575 transitions. [2021-03-10 21:14:23,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 21:14:23,877 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:14:23,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:23,878 INFO L225 Difference]: With dead ends: 1332 [2021-03-10 21:14:23,878 INFO L226 Difference]: Without dead ends: 1326 [2021-03-10 21:14:23,878 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 239.7ms TimeCoverageRelationStatistics Valid=424, Invalid=836, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 21:14:23,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2021-03-10 21:14:23,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 787. [2021-03-10 21:14:23,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 786 states have (on average 3.0063613231552164) internal successors, (2363), 786 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:23,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 2363 transitions. [2021-03-10 21:14:23,895 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 2363 transitions. Word has length 20 [2021-03-10 21:14:23,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:23,895 INFO L480 AbstractCegarLoop]: Abstraction has 787 states and 2363 transitions. [2021-03-10 21:14:23,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:23,895 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 2363 transitions. [2021-03-10 21:14:23,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:23,896 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:23,896 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:24,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-03-10 21:14:24,096 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:24,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:24,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1517885029, now seen corresponding path program 107 times [2021-03-10 21:14:24,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:24,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589329224] [2021-03-10 21:14:24,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:24,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:24,139 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:24,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589329224] [2021-03-10 21:14:24,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436784941] [2021-03-10 21:14:24,139 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:24,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:14:24,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:24,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:24,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:24,229 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:24,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:24,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 21:14:24,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684237067] [2021-03-10 21:14:24,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:14:24,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:24,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:14:24,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:14:24,230 INFO L87 Difference]: Start difference. First operand 787 states and 2363 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:24,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:24,562 INFO L93 Difference]: Finished difference Result 1321 states and 3538 transitions. [2021-03-10 21:14:24,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 21:14:24,562 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:14:24,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:24,563 INFO L225 Difference]: With dead ends: 1321 [2021-03-10 21:14:24,563 INFO L226 Difference]: Without dead ends: 1315 [2021-03-10 21:14:24,564 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 283.8ms TimeCoverageRelationStatistics Valid=487, Invalid=1405, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 21:14:24,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2021-03-10 21:14:24,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 729. [2021-03-10 21:14:24,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 728 states have (on average 2.9464285714285716) internal successors, (2145), 728 states have internal predecessors, (2145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:24,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 2145 transitions. [2021-03-10 21:14:24,573 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 2145 transitions. Word has length 20 [2021-03-10 21:14:24,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:24,573 INFO L480 AbstractCegarLoop]: Abstraction has 729 states and 2145 transitions. [2021-03-10 21:14:24,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:24,573 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 2145 transitions. [2021-03-10 21:14:24,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:24,574 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:24,574 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:24,774 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-03-10 21:14:24,775 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:24,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:24,775 INFO L82 PathProgramCache]: Analyzing trace with hash -413686517, now seen corresponding path program 108 times [2021-03-10 21:14:24,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:24,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43861699] [2021-03-10 21:14:24,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:24,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:24,812 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:24,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43861699] [2021-03-10 21:14:24,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554654306] [2021-03-10 21:14:24,812 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:24,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:14:24,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:24,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:24,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:24,908 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:24,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:24,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 21:14:24,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743826666] [2021-03-10 21:14:24,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:14:24,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:24,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:14:24,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:14:24,909 INFO L87 Difference]: Start difference. First operand 729 states and 2145 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:25,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:25,251 INFO L93 Difference]: Finished difference Result 1177 states and 3102 transitions. [2021-03-10 21:14:25,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 21:14:25,252 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-03-10 21:14:25,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:25,253 INFO L225 Difference]: With dead ends: 1177 [2021-03-10 21:14:25,253 INFO L226 Difference]: Without dead ends: 1177 [2021-03-10 21:14:25,253 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 282.8ms TimeCoverageRelationStatistics Valid=597, Invalid=1043, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 21:14:25,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2021-03-10 21:14:25,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 767. [2021-03-10 21:14:25,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 766 states have (on average 2.971279373368146) internal successors, (2276), 766 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:25,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 2276 transitions. [2021-03-10 21:14:25,262 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 2276 transitions. Word has length 20 [2021-03-10 21:14:25,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:25,262 INFO L480 AbstractCegarLoop]: Abstraction has 767 states and 2276 transitions. [2021-03-10 21:14:25,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:25,263 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 2276 transitions. [2021-03-10 21:14:25,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:25,263 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:25,263 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:25,478 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-03-10 21:14:25,479 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:25,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:25,479 INFO L82 PathProgramCache]: Analyzing trace with hash -878277621, now seen corresponding path program 109 times [2021-03-10 21:14:25,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:25,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496444137] [2021-03-10 21:14:25,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:25,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:25,514 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:25,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496444137] [2021-03-10 21:14:25,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18113828] [2021-03-10 21:14:25,515 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:14:25,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:25,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:25,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:25,604 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:25,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:25,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 21:14:25,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886620881] [2021-03-10 21:14:25,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:14:25,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:25,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:14:25,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:14:25,605 INFO L87 Difference]: Start difference. First operand 767 states and 2276 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:25,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:25,986 INFO L93 Difference]: Finished difference Result 1009 states and 2756 transitions. [2021-03-10 21:14:25,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 21:14:25,986 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:14:25,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:25,987 INFO L225 Difference]: With dead ends: 1009 [2021-03-10 21:14:25,987 INFO L226 Difference]: Without dead ends: 1005 [2021-03-10 21:14:25,988 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 314.4ms TimeCoverageRelationStatistics Valid=781, Invalid=1475, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 21:14:25,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2021-03-10 21:14:25,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 699. [2021-03-10 21:14:25,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 2.9283667621776504) internal successors, (2044), 698 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:25,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 2044 transitions. [2021-03-10 21:14:25,995 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 2044 transitions. Word has length 20 [2021-03-10 21:14:25,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:25,995 INFO L480 AbstractCegarLoop]: Abstraction has 699 states and 2044 transitions. [2021-03-10 21:14:25,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:25,995 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 2044 transitions. [2021-03-10 21:14:25,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:25,996 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:25,996 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:26,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-03-10 21:14:26,196 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:26,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:26,197 INFO L82 PathProgramCache]: Analyzing trace with hash 2053114831, now seen corresponding path program 110 times [2021-03-10 21:14:26,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:26,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126107147] [2021-03-10 21:14:26,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:26,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:26,232 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:26,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126107147] [2021-03-10 21:14:26,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226223637] [2021-03-10 21:14:26,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:26,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:26,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:26,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:26,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:26,321 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:26,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:26,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 21:14:26,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613183194] [2021-03-10 21:14:26,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:14:26,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:26,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:14:26,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:14:26,322 INFO L87 Difference]: Start difference. First operand 699 states and 2044 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:26,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:26,641 INFO L93 Difference]: Finished difference Result 1249 states and 3308 transitions. [2021-03-10 21:14:26,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 21:14:26,642 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:14:26,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:26,643 INFO L225 Difference]: With dead ends: 1249 [2021-03-10 21:14:26,643 INFO L226 Difference]: Without dead ends: 1240 [2021-03-10 21:14:26,643 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 270.8ms TimeCoverageRelationStatistics Valid=421, Invalid=1301, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 21:14:26,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-03-10 21:14:26,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 724. [2021-03-10 21:14:26,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 723 states have (on average 2.936376210235131) internal successors, (2123), 723 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:26,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 2123 transitions. [2021-03-10 21:14:26,652 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 2123 transitions. Word has length 20 [2021-03-10 21:14:26,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:26,652 INFO L480 AbstractCegarLoop]: Abstraction has 724 states and 2123 transitions. [2021-03-10 21:14:26,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:26,652 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 2123 transitions. [2021-03-10 21:14:26,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:26,653 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:26,653 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:26,853 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-03-10 21:14:26,853 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:26,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:26,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1465369509, now seen corresponding path program 111 times [2021-03-10 21:14:26,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:26,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633434649] [2021-03-10 21:14:26,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:26,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:26,890 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:26,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633434649] [2021-03-10 21:14:26,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473510799] [2021-03-10 21:14:26,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:26,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:14:26,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:26,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:26,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:26,978 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:26,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:26,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 21:14:26,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997396741] [2021-03-10 21:14:26,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:14:26,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:26,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:14:26,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:14:26,979 INFO L87 Difference]: Start difference. First operand 724 states and 2123 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:27,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:27,258 INFO L93 Difference]: Finished difference Result 1262 states and 3371 transitions. [2021-03-10 21:14:27,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 21:14:27,258 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:14:27,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:27,259 INFO L225 Difference]: With dead ends: 1262 [2021-03-10 21:14:27,259 INFO L226 Difference]: Without dead ends: 1250 [2021-03-10 21:14:27,259 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 244.4ms TimeCoverageRelationStatistics Valid=374, Invalid=1186, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 21:14:27,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-03-10 21:14:27,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 734. [2021-03-10 21:14:27,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 2.9263301500682126) internal successors, (2145), 733 states have internal predecessors, (2145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:27,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 2145 transitions. [2021-03-10 21:14:27,268 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 2145 transitions. Word has length 20 [2021-03-10 21:14:27,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:27,268 INFO L480 AbstractCegarLoop]: Abstraction has 734 states and 2145 transitions. [2021-03-10 21:14:27,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:27,268 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 2145 transitions. [2021-03-10 21:14:27,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:27,269 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:27,269 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:27,469 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:27,470 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:27,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:27,470 INFO L82 PathProgramCache]: Analyzing trace with hash 425133711, now seen corresponding path program 112 times [2021-03-10 21:14:27,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:27,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77268662] [2021-03-10 21:14:27,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:27,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:27,506 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:27,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77268662] [2021-03-10 21:14:27,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544721360] [2021-03-10 21:14:27,507 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:27,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:14:27,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:27,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:27,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:27,592 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:27,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:27,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 21:14:27,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526118180] [2021-03-10 21:14:27,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:14:27,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:27,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:14:27,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:14:27,593 INFO L87 Difference]: Start difference. First operand 734 states and 2145 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:27,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:27,810 INFO L93 Difference]: Finished difference Result 1109 states and 3026 transitions. [2021-03-10 21:14:27,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:14:27,811 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:14:27,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:27,812 INFO L225 Difference]: With dead ends: 1109 [2021-03-10 21:14:27,812 INFO L226 Difference]: Without dead ends: 1097 [2021-03-10 21:14:27,812 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 212.6ms TimeCoverageRelationStatistics Valid=296, Invalid=894, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:14:27,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2021-03-10 21:14:27,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 734. [2021-03-10 21:14:27,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 2.922237380627558) internal successors, (2142), 733 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:27,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 2142 transitions. [2021-03-10 21:14:27,820 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 2142 transitions. Word has length 20 [2021-03-10 21:14:27,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:27,820 INFO L480 AbstractCegarLoop]: Abstraction has 734 states and 2142 transitions. [2021-03-10 21:14:27,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:27,820 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 2142 transitions. [2021-03-10 21:14:27,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:27,821 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:27,821 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:28,021 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-03-10 21:14:28,022 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:28,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:28,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1225555761, now seen corresponding path program 113 times [2021-03-10 21:14:28,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:28,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210971963] [2021-03-10 21:14:28,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:28,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:28,053 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:28,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210971963] [2021-03-10 21:14:28,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017922943] [2021-03-10 21:14:28,054 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:28,072 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:14:28,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:28,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:28,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:28,146 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:28,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:28,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-03-10 21:14:28,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211143270] [2021-03-10 21:14:28,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:14:28,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:28,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:14:28,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:14:28,147 INFO L87 Difference]: Start difference. First operand 734 states and 2142 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 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) [2021-03-10 21:14:28,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:28,470 INFO L93 Difference]: Finished difference Result 1207 states and 3153 transitions. [2021-03-10 21:14:28,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 21:14:28,470 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 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 [2021-03-10 21:14:28,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:28,471 INFO L225 Difference]: With dead ends: 1207 [2021-03-10 21:14:28,471 INFO L226 Difference]: Without dead ends: 1201 [2021-03-10 21:14:28,472 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 264.1ms TimeCoverageRelationStatistics Valid=545, Invalid=937, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 21:14:28,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-03-10 21:14:28,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 788. [2021-03-10 21:14:28,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 787 states have (on average 2.9479034307496823) internal successors, (2320), 787 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:28,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 2320 transitions. [2021-03-10 21:14:28,482 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 2320 transitions. Word has length 20 [2021-03-10 21:14:28,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:28,482 INFO L480 AbstractCegarLoop]: Abstraction has 788 states and 2320 transitions. [2021-03-10 21:14:28,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 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) [2021-03-10 21:14:28,482 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 2320 transitions. [2021-03-10 21:14:28,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:28,483 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:28,483 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:28,687 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:28,687 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:28,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:28,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1690146865, now seen corresponding path program 114 times [2021-03-10 21:14:28,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:28,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893910794] [2021-03-10 21:14:28,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:28,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:28,721 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:28,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893910794] [2021-03-10 21:14:28,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854384286] [2021-03-10 21:14:28,721 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:14:28,740 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:14:28,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:28,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:28,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:28,815 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:28,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:28,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-03-10 21:14:28,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596306463] [2021-03-10 21:14:28,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:14:28,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:28,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:14:28,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:14:28,816 INFO L87 Difference]: Start difference. First operand 788 states and 2320 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:29,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:29,212 INFO L93 Difference]: Finished difference Result 1081 states and 2841 transitions. [2021-03-10 21:14:29,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 21:14:29,213 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:14:29,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:29,214 INFO L225 Difference]: With dead ends: 1081 [2021-03-10 21:14:29,214 INFO L226 Difference]: Without dead ends: 1075 [2021-03-10 21:14:29,214 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 339.2ms TimeCoverageRelationStatistics Valid=782, Invalid=1570, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 21:14:29,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2021-03-10 21:14:29,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 726. [2021-03-10 21:14:29,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 2.9117241379310346) internal successors, (2111), 725 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:29,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 2111 transitions. [2021-03-10 21:14:29,223 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 2111 transitions. Word has length 20 [2021-03-10 21:14:29,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:29,223 INFO L480 AbstractCegarLoop]: Abstraction has 726 states and 2111 transitions. [2021-03-10 21:14:29,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:29,223 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 2111 transitions. [2021-03-10 21:14:29,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:29,223 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:29,224 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:29,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-03-10 21:14:29,438 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:29,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:29,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1723746093, now seen corresponding path program 115 times [2021-03-10 21:14:29,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:29,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711385353] [2021-03-10 21:14:29,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:29,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:29,476 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:29,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711385353] [2021-03-10 21:14:29,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339748246] [2021-03-10 21:14:29,476 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:29,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:29,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:29,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:29,575 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:29,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:29,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:14:29,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374349408] [2021-03-10 21:14:29,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:14:29,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:29,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:14:29,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:14:29,576 INFO L87 Difference]: Start difference. First operand 726 states and 2111 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) [2021-03-10 21:14:29,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:29,938 INFO L93 Difference]: Finished difference Result 974 states and 2590 transitions. [2021-03-10 21:14:29,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 21:14:29,939 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 20 [2021-03-10 21:14:29,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:29,940 INFO L225 Difference]: With dead ends: 974 [2021-03-10 21:14:29,940 INFO L226 Difference]: Without dead ends: 966 [2021-03-10 21:14:29,940 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 321.5ms TimeCoverageRelationStatistics Valid=776, Invalid=1674, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 21:14:29,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-03-10 21:14:29,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 737. [2021-03-10 21:14:29,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 2.917119565217391) internal successors, (2147), 736 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:29,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2147 transitions. [2021-03-10 21:14:29,948 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2147 transitions. Word has length 20 [2021-03-10 21:14:29,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:29,948 INFO L480 AbstractCegarLoop]: Abstraction has 737 states and 2147 transitions. [2021-03-10 21:14:29,948 INFO L481 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) [2021-03-10 21:14:29,948 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2147 transitions. [2021-03-10 21:14:29,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:29,949 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:29,949 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:30,149 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable218 [2021-03-10 21:14:30,149 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:30,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:30,150 INFO L82 PathProgramCache]: Analyzing trace with hash -623698549, now seen corresponding path program 116 times [2021-03-10 21:14:30,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:30,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223041084] [2021-03-10 21:14:30,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:30,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:30,179 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:30,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223041084] [2021-03-10 21:14:30,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623222611] [2021-03-10 21:14:30,180 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 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 [2021-03-10 21:14:30,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:30,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:30,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:30,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:30,282 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:30,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:30,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-03-10 21:14:30,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414520466] [2021-03-10 21:14:30,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:14:30,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:30,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:14:30,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:14:30,283 INFO L87 Difference]: Start difference. First operand 737 states and 2147 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 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) [2021-03-10 21:14:30,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:30,585 INFO L93 Difference]: Finished difference Result 1269 states and 3314 transitions. [2021-03-10 21:14:30,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:14:30,586 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 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 [2021-03-10 21:14:30,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:30,587 INFO L225 Difference]: With dead ends: 1269 [2021-03-10 21:14:30,587 INFO L226 Difference]: Without dead ends: 1260 [2021-03-10 21:14:30,587 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 247.2ms TimeCoverageRelationStatistics Valid=495, Invalid=837, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:14:30,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2021-03-10 21:14:30,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 824. [2021-03-10 21:14:30,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 823 states have (on average 2.9404617253948966) internal successors, (2420), 823 states have internal predecessors, (2420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:30,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 2420 transitions. [2021-03-10 21:14:30,597 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 2420 transitions. Word has length 20 [2021-03-10 21:14:30,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:30,597 INFO L480 AbstractCegarLoop]: Abstraction has 824 states and 2420 transitions. [2021-03-10 21:14:30,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 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) [2021-03-10 21:14:30,597 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 2420 transitions. [2021-03-10 21:14:30,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:30,598 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:30,598 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:30,798 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:30,798 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:30,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:30,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1088289653, now seen corresponding path program 117 times [2021-03-10 21:14:30,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:30,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985642322] [2021-03-10 21:14:30,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:30,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:30,831 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:30,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985642322] [2021-03-10 21:14:30,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772071360] [2021-03-10 21:14:30,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:30,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:14:30,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:30,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:30,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:30,929 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:30,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:30,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-03-10 21:14:30,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375414690] [2021-03-10 21:14:30,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:14:30,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:30,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:14:30,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:14:30,929 INFO L87 Difference]: Start difference. First operand 824 states and 2420 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:31,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:31,385 INFO L93 Difference]: Finished difference Result 1150 states and 3032 transitions. [2021-03-10 21:14:31,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-10 21:14:31,386 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-03-10 21:14:31,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:31,387 INFO L225 Difference]: With dead ends: 1150 [2021-03-10 21:14:31,387 INFO L226 Difference]: Without dead ends: 1144 [2021-03-10 21:14:31,387 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 398.4ms TimeCoverageRelationStatistics Valid=855, Invalid=1797, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 21:14:31,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2021-03-10 21:14:31,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 795. [2021-03-10 21:14:31,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 794 states have (on average 2.9168765743073046) internal successors, (2316), 794 states have internal predecessors, (2316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:31,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 2316 transitions. [2021-03-10 21:14:31,401 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 2316 transitions. Word has length 20 [2021-03-10 21:14:31,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:31,401 INFO L480 AbstractCegarLoop]: Abstraction has 795 states and 2316 transitions. [2021-03-10 21:14:31,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:31,401 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 2316 transitions. [2021-03-10 21:14:31,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:31,402 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:31,402 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:31,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:31,602 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:31,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:31,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1121888881, now seen corresponding path program 118 times [2021-03-10 21:14:31,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:31,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417288763] [2021-03-10 21:14:31,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:31,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:31,645 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:31,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417288763] [2021-03-10 21:14:31,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790604554] [2021-03-10 21:14:31,645 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:31,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:14:31,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:31,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:31,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:31,743 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:31,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:31,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-03-10 21:14:31,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929928188] [2021-03-10 21:14:31,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:14:31,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:31,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:14:31,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:14:31,744 INFO L87 Difference]: Start difference. First operand 795 states and 2316 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:32,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:32,151 INFO L93 Difference]: Finished difference Result 1155 states and 3056 transitions. [2021-03-10 21:14:32,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 21:14:32,151 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:14:32,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:32,152 INFO L225 Difference]: With dead ends: 1155 [2021-03-10 21:14:32,152 INFO L226 Difference]: Without dead ends: 1147 [2021-03-10 21:14:32,153 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 356.1ms TimeCoverageRelationStatistics Valid=776, Invalid=1774, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 21:14:32,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2021-03-10 21:14:32,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 789. [2021-03-10 21:14:32,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 788 states have (on average 2.9289340101522843) internal successors, (2308), 788 states have internal predecessors, (2308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:32,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 2308 transitions. [2021-03-10 21:14:32,162 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 2308 transitions. Word has length 20 [2021-03-10 21:14:32,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:32,162 INFO L480 AbstractCegarLoop]: Abstraction has 789 states and 2308 transitions. [2021-03-10 21:14:32,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:32,162 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 2308 transitions. [2021-03-10 21:14:32,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:32,163 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:32,163 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:32,363 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-03-10 21:14:32,363 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:32,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:32,364 INFO L82 PathProgramCache]: Analyzing trace with hash 2131502347, now seen corresponding path program 119 times [2021-03-10 21:14:32,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:32,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527518911] [2021-03-10 21:14:32,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:32,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:32,401 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:32,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527518911] [2021-03-10 21:14:32,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145092399] [2021-03-10 21:14:32,402 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:32,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:14:32,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:32,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:32,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:32,509 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:32,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:32,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:14:32,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583873506] [2021-03-10 21:14:32,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:14:32,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:32,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:14:32,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:14:32,510 INFO L87 Difference]: Start difference. First operand 789 states and 2308 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) [2021-03-10 21:14:32,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:32,907 INFO L93 Difference]: Finished difference Result 1081 states and 2905 transitions. [2021-03-10 21:14:32,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 21:14:32,907 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 20 [2021-03-10 21:14:32,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:32,908 INFO L225 Difference]: With dead ends: 1081 [2021-03-10 21:14:32,908 INFO L226 Difference]: Without dead ends: 1069 [2021-03-10 21:14:32,908 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 342.2ms TimeCoverageRelationStatistics Valid=746, Invalid=1804, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 21:14:32,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2021-03-10 21:14:32,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 809. [2021-03-10 21:14:32,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 808 states have (on average 2.9294554455445545) internal successors, (2367), 808 states have internal predecessors, (2367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:32,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 2367 transitions. [2021-03-10 21:14:32,917 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 2367 transitions. Word has length 20 [2021-03-10 21:14:32,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:32,917 INFO L480 AbstractCegarLoop]: Abstraction has 809 states and 2367 transitions. [2021-03-10 21:14:32,917 INFO L481 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) [2021-03-10 21:14:32,917 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 2367 transitions. [2021-03-10 21:14:32,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:32,918 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:32,918 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:33,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:33,118 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:33,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:33,119 INFO L82 PathProgramCache]: Analyzing trace with hash 854005839, now seen corresponding path program 120 times [2021-03-10 21:14:33,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:33,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400661599] [2021-03-10 21:14:33,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:33,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:33,143 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:33,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400661599] [2021-03-10 21:14:33,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538469612] [2021-03-10 21:14:33,143 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:33,161 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:14:33,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:33,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:33,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:33,242 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:33,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:33,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-03-10 21:14:33,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129529543] [2021-03-10 21:14:33,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:14:33,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:33,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:14:33,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:14:33,243 INFO L87 Difference]: Start difference. First operand 809 states and 2367 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:33,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:33,542 INFO L93 Difference]: Finished difference Result 1520 states and 4046 transitions. [2021-03-10 21:14:33,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:14:33,543 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-03-10 21:14:33,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:33,544 INFO L225 Difference]: With dead ends: 1520 [2021-03-10 21:14:33,544 INFO L226 Difference]: Without dead ends: 1514 [2021-03-10 21:14:33,545 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 252.0ms TimeCoverageRelationStatistics Valid=491, Invalid=841, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:14:33,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2021-03-10 21:14:33,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 989. [2021-03-10 21:14:33,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 989 states, 988 states have (on average 2.9898785425101213) internal successors, (2954), 988 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:33,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 2954 transitions. [2021-03-10 21:14:33,557 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 2954 transitions. Word has length 20 [2021-03-10 21:14:33,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:33,557 INFO L480 AbstractCegarLoop]: Abstraction has 989 states and 2954 transitions. [2021-03-10 21:14:33,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:33,557 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 2954 transitions. [2021-03-10 21:14:33,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:33,558 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:33,558 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:33,759 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-03-10 21:14:33,759 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:33,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:33,759 INFO L82 PathProgramCache]: Analyzing trace with hash 389414735, now seen corresponding path program 121 times [2021-03-10 21:14:33,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:33,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235437833] [2021-03-10 21:14:33,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:33,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:33,784 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:33,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235437833] [2021-03-10 21:14:33,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083434197] [2021-03-10 21:14:33,785 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:14:33,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:33,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:33,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:33,887 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:33,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:33,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-03-10 21:14:33,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179191525] [2021-03-10 21:14:33,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:14:33,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:33,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:14:33,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:14:33,888 INFO L87 Difference]: Start difference. First operand 989 states and 2954 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 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) [2021-03-10 21:14:34,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:34,385 INFO L93 Difference]: Finished difference Result 1383 states and 3716 transitions. [2021-03-10 21:14:34,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-10 21:14:34,386 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 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 [2021-03-10 21:14:34,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:34,387 INFO L225 Difference]: With dead ends: 1383 [2021-03-10 21:14:34,387 INFO L226 Difference]: Without dead ends: 1379 [2021-03-10 21:14:34,387 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 438.1ms TimeCoverageRelationStatistics Valid=988, Invalid=2204, Unknown=0, NotChecked=0, Total=3192 [2021-03-10 21:14:34,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2021-03-10 21:14:34,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 956. [2021-03-10 21:14:34,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 955 states have (on average 2.966492146596859) internal successors, (2833), 955 states have internal predecessors, (2833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:34,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 2833 transitions. [2021-03-10 21:14:34,398 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 2833 transitions. Word has length 20 [2021-03-10 21:14:34,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:34,398 INFO L480 AbstractCegarLoop]: Abstraction has 956 states and 2833 transitions. [2021-03-10 21:14:34,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 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) [2021-03-10 21:14:34,398 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 2833 transitions. [2021-03-10 21:14:34,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:34,399 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:34,399 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:34,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-03-10 21:14:34,600 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:34,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:34,600 INFO L82 PathProgramCache]: Analyzing trace with hash 355815507, now seen corresponding path program 122 times [2021-03-10 21:14:34,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:34,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262129876] [2021-03-10 21:14:34,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:34,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:34,628 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:34,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262129876] [2021-03-10 21:14:34,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117882551] [2021-03-10 21:14:34,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:34,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:34,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:34,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:34,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:34,730 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:34,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:34,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-03-10 21:14:34,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596235346] [2021-03-10 21:14:34,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:14:34,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:34,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:14:34,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:14:34,731 INFO L87 Difference]: Start difference. First operand 956 states and 2833 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:35,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:35,173 INFO L93 Difference]: Finished difference Result 1412 states and 3831 transitions. [2021-03-10 21:14:35,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-10 21:14:35,173 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:14:35,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:35,174 INFO L225 Difference]: With dead ends: 1412 [2021-03-10 21:14:35,174 INFO L226 Difference]: Without dead ends: 1404 [2021-03-10 21:14:35,175 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 398.4ms TimeCoverageRelationStatistics Valid=842, Invalid=2020, Unknown=0, NotChecked=0, Total=2862 [2021-03-10 21:14:35,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2021-03-10 21:14:35,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1024. [2021-03-10 21:14:35,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 1023 states have (on average 2.9980449657869013) internal successors, (3067), 1023 states have internal predecessors, (3067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:35,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 3067 transitions. [2021-03-10 21:14:35,186 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 3067 transitions. Word has length 20 [2021-03-10 21:14:35,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:35,186 INFO L480 AbstractCegarLoop]: Abstraction has 1024 states and 3067 transitions. [2021-03-10 21:14:35,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:35,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 3067 transitions. [2021-03-10 21:14:35,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:35,187 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:35,187 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:35,388 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-03-10 21:14:35,388 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:35,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:35,388 INFO L82 PathProgramCache]: Analyzing trace with hash -685760561, now seen corresponding path program 123 times [2021-03-10 21:14:35,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:35,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695052759] [2021-03-10 21:14:35,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:35,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:35,421 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:35,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695052759] [2021-03-10 21:14:35,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763067952] [2021-03-10 21:14:35,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:35,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:14:35,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:35,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:35,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:35,528 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:35,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:35,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-03-10 21:14:35,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051253760] [2021-03-10 21:14:35,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:14:35,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:35,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:14:35,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:14:35,529 INFO L87 Difference]: Start difference. First operand 1024 states and 3067 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:35,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:35,954 INFO L93 Difference]: Finished difference Result 1501 states and 4138 transitions. [2021-03-10 21:14:35,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 21:14:35,954 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:14:35,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:35,956 INFO L225 Difference]: With dead ends: 1501 [2021-03-10 21:14:35,956 INFO L226 Difference]: Without dead ends: 1489 [2021-03-10 21:14:35,956 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 371.9ms TimeCoverageRelationStatistics Valid=743, Invalid=1909, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 21:14:35,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1489 states. [2021-03-10 21:14:35,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1489 to 1112. [2021-03-10 21:14:35,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 3.027902790279028) internal successors, (3364), 1111 states have internal predecessors, (3364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:35,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 3364 transitions. [2021-03-10 21:14:35,969 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 3364 transitions. Word has length 20 [2021-03-10 21:14:35,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:35,969 INFO L480 AbstractCegarLoop]: Abstraction has 1112 states and 3364 transitions. [2021-03-10 21:14:35,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:35,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 3364 transitions. [2021-03-10 21:14:35,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:35,970 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:35,970 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:36,171 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:36,171 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:36,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:36,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1385119699, now seen corresponding path program 124 times [2021-03-10 21:14:36,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:36,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273424457] [2021-03-10 21:14:36,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:36,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:36,211 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:36,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273424457] [2021-03-10 21:14:36,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013723297] [2021-03-10 21:14:36,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:36,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:14:36,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:36,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:36,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:36,327 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:36,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:36,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:14:36,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237108900] [2021-03-10 21:14:36,328 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:14:36,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:36,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:14:36,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:14:36,328 INFO L87 Difference]: Start difference. First operand 1112 states and 3364 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) [2021-03-10 21:14:36,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:36,704 INFO L93 Difference]: Finished difference Result 1470 states and 4125 transitions. [2021-03-10 21:14:36,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 21:14:36,705 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 [2021-03-10 21:14:36,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:36,706 INFO L225 Difference]: With dead ends: 1470 [2021-03-10 21:14:36,706 INFO L226 Difference]: Without dead ends: 1454 [2021-03-10 21:14:36,707 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 350.1ms TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 21:14:36,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2021-03-10 21:14:36,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 1142. [2021-03-10 21:14:36,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 3.028045574057844) internal successors, (3455), 1141 states have internal predecessors, (3455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:36,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 3455 transitions. [2021-03-10 21:14:36,719 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 3455 transitions. Word has length 20 [2021-03-10 21:14:36,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:36,719 INFO L480 AbstractCegarLoop]: Abstraction has 1142 states and 3455 transitions. [2021-03-10 21:14:36,719 INFO L481 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) [2021-03-10 21:14:36,719 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 3455 transitions. [2021-03-10 21:14:36,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:36,720 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:36,720 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:36,921 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2021-03-10 21:14:36,921 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:36,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:36,921 INFO L82 PathProgramCache]: Analyzing trace with hash 693043539, now seen corresponding path program 125 times [2021-03-10 21:14:36,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:36,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133159879] [2021-03-10 21:14:36,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:36,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:36,961 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:36,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133159879] [2021-03-10 21:14:36,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42095590] [2021-03-10 21:14:36,962 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:37,007 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:14:37,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:37,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:37,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:37,066 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:37,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:37,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-03-10 21:14:37,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639916543] [2021-03-10 21:14:37,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:14:37,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:37,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:14:37,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:14:37,067 INFO L87 Difference]: Start difference. First operand 1142 states and 3455 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) [2021-03-10 21:14:37,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:37,159 INFO L93 Difference]: Finished difference Result 1462 states and 4279 transitions. [2021-03-10 21:14:37,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:37,159 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 20 [2021-03-10 21:14:37,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:37,160 INFO L225 Difference]: With dead ends: 1462 [2021-03-10 21:14:37,161 INFO L226 Difference]: Without dead ends: 1462 [2021-03-10 21:14:37,161 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 88.9ms TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:14:37,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2021-03-10 21:14:37,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1165. [2021-03-10 21:14:37,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 1164 states have (on average 3.0300687285223367) internal successors, (3527), 1164 states have internal predecessors, (3527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:37,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 3527 transitions. [2021-03-10 21:14:37,173 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 3527 transitions. Word has length 20 [2021-03-10 21:14:37,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:37,173 INFO L480 AbstractCegarLoop]: Abstraction has 1165 states and 3527 transitions. [2021-03-10 21:14:37,173 INFO L481 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) [2021-03-10 21:14:37,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 3527 transitions. [2021-03-10 21:14:37,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:37,174 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:37,174 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:37,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-03-10 21:14:37,375 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:37,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:37,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1067009401, now seen corresponding path program 126 times [2021-03-10 21:14:37,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:37,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928850722] [2021-03-10 21:14:37,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:37,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:37,413 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:37,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928850722] [2021-03-10 21:14:37,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469124446] [2021-03-10 21:14:37,413 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:37,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:14:37,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:37,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:37,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:37,495 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:37,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:37,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 21:14:37,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994864261] [2021-03-10 21:14:37,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:14:37,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:37,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:14:37,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:14:37,495 INFO L87 Difference]: Start difference. First operand 1165 states and 3527 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:37,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:37,649 INFO L93 Difference]: Finished difference Result 1324 states and 3884 transitions. [2021-03-10 21:14:37,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:14:37,649 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:14:37,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:37,651 INFO L225 Difference]: With dead ends: 1324 [2021-03-10 21:14:37,651 INFO L226 Difference]: Without dead ends: 1324 [2021-03-10 21:14:37,651 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 132.4ms TimeCoverageRelationStatistics Valid=218, Invalid=432, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:14:37,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2021-03-10 21:14:37,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 1168. [2021-03-10 21:14:37,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 3.0299914310197087) internal successors, (3536), 1167 states have internal predecessors, (3536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:37,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 3536 transitions. [2021-03-10 21:14:37,663 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 3536 transitions. Word has length 20 [2021-03-10 21:14:37,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:37,663 INFO L480 AbstractCegarLoop]: Abstraction has 1168 states and 3536 transitions. [2021-03-10 21:14:37,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:37,664 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 3536 transitions. [2021-03-10 21:14:37,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:37,665 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:37,665 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:37,879 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:37,879 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:37,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:37,880 INFO L82 PathProgramCache]: Analyzing trace with hash -181211121, now seen corresponding path program 127 times [2021-03-10 21:14:37,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:37,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208337296] [2021-03-10 21:14:37,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:37,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:37,917 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:37,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208337296] [2021-03-10 21:14:37,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752753948] [2021-03-10 21:14:37,917 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:37,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:37,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:37,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:37,999 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:37,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:37,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 21:14:37,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412189594] [2021-03-10 21:14:37,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:14:37,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:38,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:14:38,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:14:38,000 INFO L87 Difference]: Start difference. First operand 1168 states and 3536 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:38,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:38,188 INFO L93 Difference]: Finished difference Result 1344 states and 3926 transitions. [2021-03-10 21:14:38,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:14:38,188 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:14:38,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:38,190 INFO L225 Difference]: With dead ends: 1344 [2021-03-10 21:14:38,190 INFO L226 Difference]: Without dead ends: 1344 [2021-03-10 21:14:38,190 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 161.2ms TimeCoverageRelationStatistics Valid=267, Invalid=545, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:14:38,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-03-10 21:14:38,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 1174. [2021-03-10 21:14:38,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1174 states, 1173 states have (on average 3.029838022165388) internal successors, (3554), 1173 states have internal predecessors, (3554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:38,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 3554 transitions. [2021-03-10 21:14:38,202 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 3554 transitions. Word has length 20 [2021-03-10 21:14:38,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:38,202 INFO L480 AbstractCegarLoop]: Abstraction has 1174 states and 3554 transitions. [2021-03-10 21:14:38,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:38,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 3554 transitions. [2021-03-10 21:14:38,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:38,203 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:38,203 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:38,403 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:38,403 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:38,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:38,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1925572999, now seen corresponding path program 128 times [2021-03-10 21:14:38,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:38,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908269357] [2021-03-10 21:14:38,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:38,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:38,440 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:38,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908269357] [2021-03-10 21:14:38,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629028079] [2021-03-10 21:14:38,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:38,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:38,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:38,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:38,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:38,523 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:38,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:38,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 21:14:38,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817944592] [2021-03-10 21:14:38,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:14:38,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:38,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:14:38,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:14:38,524 INFO L87 Difference]: Start difference. First operand 1174 states and 3554 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:38,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:38,826 INFO L93 Difference]: Finished difference Result 1444 states and 4134 transitions. [2021-03-10 21:14:38,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:14:38,826 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:14:38,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:38,828 INFO L225 Difference]: With dead ends: 1444 [2021-03-10 21:14:38,828 INFO L226 Difference]: Without dead ends: 1444 [2021-03-10 21:14:38,828 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 240.6ms TimeCoverageRelationStatistics Valid=459, Invalid=873, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:14:38,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2021-03-10 21:14:38,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 1198. [2021-03-10 21:14:38,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.0334168755221387) internal successors, (3631), 1197 states have internal predecessors, (3631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:38,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 3631 transitions. [2021-03-10 21:14:38,840 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 3631 transitions. Word has length 20 [2021-03-10 21:14:38,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:38,841 INFO L480 AbstractCegarLoop]: Abstraction has 1198 states and 3631 transitions. [2021-03-10 21:14:38,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:38,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 3631 transitions. [2021-03-10 21:14:38,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:38,842 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:38,842 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:39,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:39,042 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:39,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:39,043 INFO L82 PathProgramCache]: Analyzing trace with hash -223223537, now seen corresponding path program 129 times [2021-03-10 21:14:39,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:39,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816381488] [2021-03-10 21:14:39,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:39,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:39,086 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:39,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816381488] [2021-03-10 21:14:39,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337541520] [2021-03-10 21:14:39,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:39,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:14:39,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:39,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:39,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:39,170 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:39,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:39,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 21:14:39,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318327766] [2021-03-10 21:14:39,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:14:39,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:39,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:14:39,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:14:39,171 INFO L87 Difference]: Start difference. First operand 1198 states and 3631 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:39,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:39,529 INFO L93 Difference]: Finished difference Result 1560 states and 4362 transitions. [2021-03-10 21:14:39,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 21:14:39,530 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:14:39,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:39,532 INFO L225 Difference]: With dead ends: 1560 [2021-03-10 21:14:39,532 INFO L226 Difference]: Without dead ends: 1560 [2021-03-10 21:14:39,532 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 275.7ms TimeCoverageRelationStatistics Valid=597, Invalid=1043, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 21:14:39,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2021-03-10 21:14:39,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 1182. [2021-03-10 21:14:39,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1182 states, 1181 states have (on average 3.0389500423370026) internal successors, (3589), 1181 states have internal predecessors, (3589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:39,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 3589 transitions. [2021-03-10 21:14:39,544 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 3589 transitions. Word has length 20 [2021-03-10 21:14:39,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:39,545 INFO L480 AbstractCegarLoop]: Abstraction has 1182 states and 3589 transitions. [2021-03-10 21:14:39,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:39,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 3589 transitions. [2021-03-10 21:14:39,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:39,546 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:39,546 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:39,746 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-03-10 21:14:39,746 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:39,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:39,747 INFO L82 PathProgramCache]: Analyzing trace with hash 348231269, now seen corresponding path program 130 times [2021-03-10 21:14:39,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:39,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575128879] [2021-03-10 21:14:39,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:39,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:39,784 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:39,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575128879] [2021-03-10 21:14:39,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081641757] [2021-03-10 21:14:39,784 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 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 [2021-03-10 21:14:39,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:14:39,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:39,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:39,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:39,869 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:39,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:39,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 21:14:39,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580815276] [2021-03-10 21:14:39,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:14:39,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:39,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:14:39,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:14:39,870 INFO L87 Difference]: Start difference. First operand 1182 states and 3589 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:40,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:40,241 INFO L93 Difference]: Finished difference Result 1402 states and 3999 transitions. [2021-03-10 21:14:40,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 21:14:40,242 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:14:40,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:40,243 INFO L225 Difference]: With dead ends: 1402 [2021-03-10 21:14:40,243 INFO L226 Difference]: Without dead ends: 1396 [2021-03-10 21:14:40,244 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 310.4ms TimeCoverageRelationStatistics Valid=781, Invalid=1475, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 21:14:40,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2021-03-10 21:14:40,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 1135. [2021-03-10 21:14:40,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 1134 states have (on average 3.0246913580246915) internal successors, (3430), 1134 states have internal predecessors, (3430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:40,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 3430 transitions. [2021-03-10 21:14:40,256 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 3430 transitions. Word has length 20 [2021-03-10 21:14:40,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:40,256 INFO L480 AbstractCegarLoop]: Abstraction has 1135 states and 3430 transitions. [2021-03-10 21:14:40,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:40,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 3430 transitions. [2021-03-10 21:14:40,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:40,257 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:40,257 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:40,457 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-03-10 21:14:40,457 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:40,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:40,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1583340277, now seen corresponding path program 131 times [2021-03-10 21:14:40,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:40,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515870567] [2021-03-10 21:14:40,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:40,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:40,494 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:40,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515870567] [2021-03-10 21:14:40,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283071630] [2021-03-10 21:14:40,495 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:14:40,512 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:14:40,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:40,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:40,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:40,606 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:40,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:40,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 21:14:40,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914815680] [2021-03-10 21:14:40,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:14:40,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:40,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:14:40,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:14:40,607 INFO L87 Difference]: Start difference. First operand 1135 states and 3430 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:40,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:40,910 INFO L93 Difference]: Finished difference Result 1746 states and 4918 transitions. [2021-03-10 21:14:40,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 21:14:40,911 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-03-10 21:14:40,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:40,913 INFO L225 Difference]: With dead ends: 1746 [2021-03-10 21:14:40,913 INFO L226 Difference]: Without dead ends: 1737 [2021-03-10 21:14:40,913 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 250.2ms TimeCoverageRelationStatistics Valid=424, Invalid=836, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 21:14:40,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1737 states. [2021-03-10 21:14:40,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1737 to 1314. [2021-03-10 21:14:40,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 1313 states have (on average 3.0662604722010665) internal successors, (4026), 1313 states have internal predecessors, (4026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:40,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 4026 transitions. [2021-03-10 21:14:40,942 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 4026 transitions. Word has length 20 [2021-03-10 21:14:40,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:40,942 INFO L480 AbstractCegarLoop]: Abstraction has 1314 states and 4026 transitions. [2021-03-10 21:14:40,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:40,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 4026 transitions. [2021-03-10 21:14:40,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:40,944 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:40,944 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:41,158 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-03-10 21:14:41,159 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:41,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:41,159 INFO L82 PathProgramCache]: Analyzing trace with hash -2047931381, now seen corresponding path program 132 times [2021-03-10 21:14:41,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:41,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455675372] [2021-03-10 21:14:41,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:41,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:41,196 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:41,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455675372] [2021-03-10 21:14:41,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299688040] [2021-03-10 21:14:41,196 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:41,214 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:14:41,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:41,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:41,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:41,294 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:41,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:41,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 21:14:41,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373196238] [2021-03-10 21:14:41,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:14:41,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:41,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:14:41,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:14:41,295 INFO L87 Difference]: Start difference. First operand 1314 states and 4026 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:41,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:41,648 INFO L93 Difference]: Finished difference Result 1701 states and 4827 transitions. [2021-03-10 21:14:41,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 21:14:41,649 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:14:41,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:41,650 INFO L225 Difference]: With dead ends: 1701 [2021-03-10 21:14:41,650 INFO L226 Difference]: Without dead ends: 1697 [2021-03-10 21:14:41,651 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 290.0ms TimeCoverageRelationStatistics Valid=487, Invalid=1405, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 21:14:41,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1697 states. [2021-03-10 21:14:41,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1697 to 1246. [2021-03-10 21:14:41,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.031325301204819) internal successors, (3774), 1245 states have internal predecessors, (3774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:41,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 3774 transitions. [2021-03-10 21:14:41,665 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 3774 transitions. Word has length 20 [2021-03-10 21:14:41,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:41,665 INFO L480 AbstractCegarLoop]: Abstraction has 1246 states and 3774 transitions. [2021-03-10 21:14:41,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:41,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 3774 transitions. [2021-03-10 21:14:41,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:41,666 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:41,666 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:41,867 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-03-10 21:14:41,867 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:41,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:41,867 INFO L82 PathProgramCache]: Analyzing trace with hash -2081530609, now seen corresponding path program 133 times [2021-03-10 21:14:41,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:41,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565381019] [2021-03-10 21:14:41,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:41,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:41,905 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:41,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565381019] [2021-03-10 21:14:41,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321019546] [2021-03-10 21:14:41,905 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:41,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:41,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:41,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:41,991 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:41,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:41,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 21:14:41,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543845763] [2021-03-10 21:14:41,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:14:41,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:41,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:14:41,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:14:41,992 INFO L87 Difference]: Start difference. First operand 1246 states and 3774 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:42,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:42,299 INFO L93 Difference]: Finished difference Result 1682 states and 4760 transitions. [2021-03-10 21:14:42,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 21:14:42,300 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:14:42,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:42,302 INFO L225 Difference]: With dead ends: 1682 [2021-03-10 21:14:42,302 INFO L226 Difference]: Without dead ends: 1674 [2021-03-10 21:14:42,302 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 267.6ms TimeCoverageRelationStatistics Valid=421, Invalid=1301, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 21:14:42,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2021-03-10 21:14:42,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1299. [2021-03-10 21:14:42,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 3.0338983050847457) internal successors, (3938), 1298 states have internal predecessors, (3938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:42,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 3938 transitions. [2021-03-10 21:14:42,316 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 3938 transitions. Word has length 20 [2021-03-10 21:14:42,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:42,316 INFO L480 AbstractCegarLoop]: Abstraction has 1299 states and 3938 transitions. [2021-03-10 21:14:42,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:42,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 3938 transitions. [2021-03-10 21:14:42,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:42,317 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:42,317 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:42,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:42,531 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:42,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:42,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1171860619, now seen corresponding path program 134 times [2021-03-10 21:14:42,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:42,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799840931] [2021-03-10 21:14:42,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:42,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:42,574 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:42,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799840931] [2021-03-10 21:14:42,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286959383] [2021-03-10 21:14:42,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:42,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:42,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:42,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:42,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:42,662 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:42,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:42,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 21:14:42,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440326141] [2021-03-10 21:14:42,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:14:42,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:42,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:14:42,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:14:42,663 INFO L87 Difference]: Start difference. First operand 1299 states and 3938 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:42,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:42,941 INFO L93 Difference]: Finished difference Result 1724 states and 4914 transitions. [2021-03-10 21:14:42,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 21:14:42,941 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:14:42,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:42,943 INFO L225 Difference]: With dead ends: 1724 [2021-03-10 21:14:42,943 INFO L226 Difference]: Without dead ends: 1712 [2021-03-10 21:14:42,944 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 254.7ms TimeCoverageRelationStatistics Valid=374, Invalid=1186, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 21:14:42,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2021-03-10 21:14:42,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 1318. [2021-03-10 21:14:42,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 3.026575550493546) internal successors, (3986), 1317 states have internal predecessors, (3986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:42,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 3986 transitions. [2021-03-10 21:14:42,959 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 3986 transitions. Word has length 20 [2021-03-10 21:14:42,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:42,959 INFO L480 AbstractCegarLoop]: Abstraction has 1318 states and 3986 transitions. [2021-03-10 21:14:42,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:42,959 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 3986 transitions. [2021-03-10 21:14:42,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:42,960 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:42,960 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:43,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-03-10 21:14:43,161 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:43,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:43,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1052226417, now seen corresponding path program 135 times [2021-03-10 21:14:43,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:43,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186042440] [2021-03-10 21:14:43,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:43,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:43,202 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:43,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186042440] [2021-03-10 21:14:43,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387815827] [2021-03-10 21:14:43,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:43,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:14:43,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:43,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:43,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:43,293 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:43,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:43,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 21:14:43,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231987524] [2021-03-10 21:14:43,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:14:43,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:43,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:14:43,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:14:43,294 INFO L87 Difference]: Start difference. First operand 1318 states and 3986 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:43,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:43,508 INFO L93 Difference]: Finished difference Result 1567 states and 4524 transitions. [2021-03-10 21:14:43,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:14:43,508 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:14:43,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:43,510 INFO L225 Difference]: With dead ends: 1567 [2021-03-10 21:14:43,510 INFO L226 Difference]: Without dead ends: 1559 [2021-03-10 21:14:43,510 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 222.7ms TimeCoverageRelationStatistics Valid=296, Invalid=894, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:14:43,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1559 states. [2021-03-10 21:14:43,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1559 to 1318. [2021-03-10 21:14:43,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 3.023538344722855) internal successors, (3982), 1317 states have internal predecessors, (3982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:43,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 3982 transitions. [2021-03-10 21:14:43,525 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 3982 transitions. Word has length 20 [2021-03-10 21:14:43,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:43,525 INFO L480 AbstractCegarLoop]: Abstraction has 1318 states and 3982 transitions. [2021-03-10 21:14:43,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:43,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 3982 transitions. [2021-03-10 21:14:43,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:43,526 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:43,526 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:43,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-03-10 21:14:43,732 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:43,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:43,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1727648907, now seen corresponding path program 136 times [2021-03-10 21:14:43,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:43,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592032247] [2021-03-10 21:14:43,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:43,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:43,777 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:43,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592032247] [2021-03-10 21:14:43,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389697268] [2021-03-10 21:14:43,777 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 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 [2021-03-10 21:14:43,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:14:43,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:43,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:43,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:43,863 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:43,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:43,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-03-10 21:14:43,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010060005] [2021-03-10 21:14:43,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:14:43,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:43,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:14:43,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:14:43,864 INFO L87 Difference]: Start difference. First operand 1318 states and 3982 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) [2021-03-10 21:14:43,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:43,946 INFO L93 Difference]: Finished difference Result 1464 states and 4346 transitions. [2021-03-10 21:14:43,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:14:43,946 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 20 [2021-03-10 21:14:43,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:43,948 INFO L225 Difference]: With dead ends: 1464 [2021-03-10 21:14:43,948 INFO L226 Difference]: Without dead ends: 1454 [2021-03-10 21:14:43,948 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 118.3ms TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:14:43,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2021-03-10 21:14:43,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 1318. [2021-03-10 21:14:43,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 3.0227790432801824) internal successors, (3981), 1317 states have internal predecessors, (3981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:43,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 3981 transitions. [2021-03-10 21:14:43,961 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 3981 transitions. Word has length 20 [2021-03-10 21:14:43,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:43,961 INFO L480 AbstractCegarLoop]: Abstraction has 1318 states and 3981 transitions. [2021-03-10 21:14:43,961 INFO L481 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) [2021-03-10 21:14:43,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 3981 transitions. [2021-03-10 21:14:43,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:43,962 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:43,962 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:44,162 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-03-10 21:14:44,163 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:44,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:44,163 INFO L82 PathProgramCache]: Analyzing trace with hash 205924307, now seen corresponding path program 137 times [2021-03-10 21:14:44,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:44,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181413492] [2021-03-10 21:14:44,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:44,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:44,201 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:44,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181413492] [2021-03-10 21:14:44,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035772410] [2021-03-10 21:14:44,201 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:44,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:14:44,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:44,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:44,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:44,293 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:44,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:44,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:14:44,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996074394] [2021-03-10 21:14:44,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:14:44,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:44,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:14:44,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:14:44,294 INFO L87 Difference]: Start difference. First operand 1318 states and 3981 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) [2021-03-10 21:14:44,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:44,593 INFO L93 Difference]: Finished difference Result 1488 states and 4332 transitions. [2021-03-10 21:14:44,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:14:44,594 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 20 [2021-03-10 21:14:44,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:44,595 INFO L225 Difference]: With dead ends: 1488 [2021-03-10 21:14:44,595 INFO L226 Difference]: Without dead ends: 1488 [2021-03-10 21:14:44,595 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 255.6ms TimeCoverageRelationStatistics Valid=470, Invalid=1012, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 21:14:44,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1488 states. [2021-03-10 21:14:44,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1488 to 1320. [2021-03-10 21:14:44,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1319 states have (on average 3.0227445034116753) internal successors, (3987), 1319 states have internal predecessors, (3987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:44,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 3987 transitions. [2021-03-10 21:14:44,608 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 3987 transitions. Word has length 20 [2021-03-10 21:14:44,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:44,608 INFO L480 AbstractCegarLoop]: Abstraction has 1320 states and 3987 transitions. [2021-03-10 21:14:44,608 INFO L481 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) [2021-03-10 21:14:44,608 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 3987 transitions. [2021-03-10 21:14:44,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:44,609 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:44,609 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:44,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:44,810 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:44,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:44,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1513301805, now seen corresponding path program 138 times [2021-03-10 21:14:44,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:44,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419284177] [2021-03-10 21:14:44,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:44,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:44,841 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:44,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419284177] [2021-03-10 21:14:44,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901191565] [2021-03-10 21:14:44,841 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:44,858 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:14:44,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:44,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:44,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:44,928 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:44,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:44,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-03-10 21:14:44,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718167614] [2021-03-10 21:14:44,935 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:14:44,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:44,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:14:44,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:14:44,935 INFO L87 Difference]: Start difference. First operand 1320 states and 3987 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:45,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:45,194 INFO L93 Difference]: Finished difference Result 1578 states and 4543 transitions. [2021-03-10 21:14:45,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:14:45,194 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:14:45,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:45,196 INFO L225 Difference]: With dead ends: 1578 [2021-03-10 21:14:45,196 INFO L226 Difference]: Without dead ends: 1572 [2021-03-10 21:14:45,196 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 208.8ms TimeCoverageRelationStatistics Valid=359, Invalid=763, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:14:45,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1572 states. [2021-03-10 21:14:45,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1572 to 1335. [2021-03-10 21:14:45,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 1334 states have (on average 3.02023988005997) internal successors, (4029), 1334 states have internal predecessors, (4029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:45,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 4029 transitions. [2021-03-10 21:14:45,209 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 4029 transitions. Word has length 20 [2021-03-10 21:14:45,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:45,210 INFO L480 AbstractCegarLoop]: Abstraction has 1335 states and 4029 transitions. [2021-03-10 21:14:45,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:45,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 4029 transitions. [2021-03-10 21:14:45,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:45,211 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:45,211 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:45,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:45,413 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:45,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:45,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1479280595, now seen corresponding path program 139 times [2021-03-10 21:14:45,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:45,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535447370] [2021-03-10 21:14:45,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:45,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:45,445 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:45,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535447370] [2021-03-10 21:14:45,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142115120] [2021-03-10 21:14:45,445 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:45,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:45,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:45,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:45,535 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:45,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:45,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-03-10 21:14:45,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720283141] [2021-03-10 21:14:45,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:14:45,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:45,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:14:45,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:14:45,536 INFO L87 Difference]: Start difference. First operand 1335 states and 4029 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:45,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:45,792 INFO L93 Difference]: Finished difference Result 1610 states and 4633 transitions. [2021-03-10 21:14:45,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:14:45,792 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:14:45,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:45,794 INFO L225 Difference]: With dead ends: 1610 [2021-03-10 21:14:45,794 INFO L226 Difference]: Without dead ends: 1606 [2021-03-10 21:14:45,794 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 222.5ms TimeCoverageRelationStatistics Valid=383, Invalid=739, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:14:45,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2021-03-10 21:14:45,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1324. [2021-03-10 21:14:45,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1323 states have (on average 3.018896447467876) internal successors, (3994), 1323 states have internal predecessors, (3994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:45,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 3994 transitions. [2021-03-10 21:14:45,808 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 3994 transitions. Word has length 20 [2021-03-10 21:14:45,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:45,808 INFO L480 AbstractCegarLoop]: Abstraction has 1324 states and 3994 transitions. [2021-03-10 21:14:45,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:45,808 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 3994 transitions. [2021-03-10 21:14:45,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:45,809 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:45,809 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:46,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable242 [2021-03-10 21:14:46,010 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:46,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:46,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1437268179, now seen corresponding path program 140 times [2021-03-10 21:14:46,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:46,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473505350] [2021-03-10 21:14:46,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:46,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:46,043 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:46,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473505350] [2021-03-10 21:14:46,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325357216] [2021-03-10 21:14:46,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:46,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:46,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:46,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:46,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:46,133 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:46,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:46,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-03-10 21:14:46,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613532167] [2021-03-10 21:14:46,133 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:14:46,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:46,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:14:46,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:14:46,134 INFO L87 Difference]: Start difference. First operand 1324 states and 3994 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:46,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:46,458 INFO L93 Difference]: Finished difference Result 1777 states and 4996 transitions. [2021-03-10 21:14:46,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 21:14:46,459 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:14:46,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:46,460 INFO L225 Difference]: With dead ends: 1777 [2021-03-10 21:14:46,460 INFO L226 Difference]: Without dead ends: 1777 [2021-03-10 21:14:46,460 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 265.6ms TimeCoverageRelationStatistics Valid=545, Invalid=937, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 21:14:46,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1777 states. [2021-03-10 21:14:46,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1777 to 1334. [2021-03-10 21:14:46,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 1333 states have (on average 3.0270067516879218) internal successors, (4035), 1333 states have internal predecessors, (4035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:46,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 4035 transitions. [2021-03-10 21:14:46,475 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 4035 transitions. Word has length 20 [2021-03-10 21:14:46,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:46,475 INFO L480 AbstractCegarLoop]: Abstraction has 1334 states and 4035 transitions. [2021-03-10 21:14:46,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:46,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 4035 transitions. [2021-03-10 21:14:46,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:46,476 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:46,476 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:46,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-03-10 21:14:46,676 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:46,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:46,677 INFO L82 PathProgramCache]: Analyzing trace with hash 2008722985, now seen corresponding path program 141 times [2021-03-10 21:14:46,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:46,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91851647] [2021-03-10 21:14:46,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:46,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:46,708 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:46,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91851647] [2021-03-10 21:14:46,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044743468] [2021-03-10 21:14:46,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:46,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:14:46,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:46,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:46,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:46,797 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:46,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:46,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-03-10 21:14:46,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848558969] [2021-03-10 21:14:46,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:14:46,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:46,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:14:46,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:14:46,798 INFO L87 Difference]: Start difference. First operand 1334 states and 4035 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:47,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:47,183 INFO L93 Difference]: Finished difference Result 1692 states and 4755 transitions. [2021-03-10 21:14:47,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 21:14:47,183 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:14:47,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:47,185 INFO L225 Difference]: With dead ends: 1692 [2021-03-10 21:14:47,185 INFO L226 Difference]: Without dead ends: 1683 [2021-03-10 21:14:47,185 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 336.7ms TimeCoverageRelationStatistics Valid=782, Invalid=1570, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 21:14:47,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1683 states. [2021-03-10 21:14:47,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1683 to 1280. [2021-03-10 21:14:47,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1279 states have (on average 3.0101641907740424) internal successors, (3850), 1279 states have internal predecessors, (3850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:47,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 3850 transitions. [2021-03-10 21:14:47,204 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 3850 transitions. Word has length 20 [2021-03-10 21:14:47,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:47,204 INFO L480 AbstractCegarLoop]: Abstraction has 1280 states and 3850 transitions. [2021-03-10 21:14:47,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:47,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 3850 transitions. [2021-03-10 21:14:47,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:47,205 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:47,205 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:47,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-03-10 21:14:47,420 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:47,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:47,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1751014509, now seen corresponding path program 142 times [2021-03-10 21:14:47,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:47,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148902082] [2021-03-10 21:14:47,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:47,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:47,459 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:47,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148902082] [2021-03-10 21:14:47,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684792773] [2021-03-10 21:14:47,460 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:47,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:14:47,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:47,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:47,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:47,573 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:47,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:47,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 21:14:47,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989233559] [2021-03-10 21:14:47,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:14:47,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:47,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:14:47,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:14:47,574 INFO L87 Difference]: Start difference. First operand 1280 states and 3850 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) [2021-03-10 21:14:47,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:47,951 INFO L93 Difference]: Finished difference Result 1586 states and 4510 transitions. [2021-03-10 21:14:47,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 21:14:47,951 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 20 [2021-03-10 21:14:47,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:47,953 INFO L225 Difference]: With dead ends: 1586 [2021-03-10 21:14:47,953 INFO L226 Difference]: Without dead ends: 1574 [2021-03-10 21:14:47,953 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 332.7ms TimeCoverageRelationStatistics Valid=776, Invalid=1674, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 21:14:47,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1574 states. [2021-03-10 21:14:47,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1574 to 1291. [2021-03-10 21:14:47,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1291 states, 1290 states have (on average 3.011627906976744) internal successors, (3885), 1290 states have internal predecessors, (3885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:47,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1291 states to 1291 states and 3885 transitions. [2021-03-10 21:14:47,967 INFO L78 Accepts]: Start accepts. Automaton has 1291 states and 3885 transitions. Word has length 20 [2021-03-10 21:14:47,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:47,967 INFO L480 AbstractCegarLoop]: Abstraction has 1291 states and 3885 transitions. [2021-03-10 21:14:47,967 INFO L481 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) [2021-03-10 21:14:47,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1291 states and 3885 transitions. [2021-03-10 21:14:47,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:47,969 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:47,969 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:48,175 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-03-10 21:14:48,175 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:48,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:48,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1012163591, now seen corresponding path program 143 times [2021-03-10 21:14:48,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:48,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761915644] [2021-03-10 21:14:48,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:48,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:48,217 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:48,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761915644] [2021-03-10 21:14:48,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74063535] [2021-03-10 21:14:48,217 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:48,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:14:48,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:48,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:48,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:48,323 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:48,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:48,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:14:48,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252685508] [2021-03-10 21:14:48,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:14:48,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:48,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:14:48,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:14:48,324 INFO L87 Difference]: Start difference. First operand 1291 states and 3885 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) [2021-03-10 21:14:48,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:48,660 INFO L93 Difference]: Finished difference Result 1481 states and 4275 transitions. [2021-03-10 21:14:48,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:14:48,661 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 [2021-03-10 21:14:48,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:48,662 INFO L225 Difference]: With dead ends: 1481 [2021-03-10 21:14:48,662 INFO L226 Difference]: Without dead ends: 1481 [2021-03-10 21:14:48,662 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 303.4ms TimeCoverageRelationStatistics Valid=544, Invalid=1262, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 21:14:48,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2021-03-10 21:14:48,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 1282. [2021-03-10 21:14:48,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1281 states have (on average 3.0101483216237312) internal successors, (3856), 1281 states have internal predecessors, (3856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:48,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 3856 transitions. [2021-03-10 21:14:48,674 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 3856 transitions. Word has length 20 [2021-03-10 21:14:48,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:48,674 INFO L480 AbstractCegarLoop]: Abstraction has 1282 states and 3856 transitions. [2021-03-10 21:14:48,674 INFO L481 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) [2021-03-10 21:14:48,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 3856 transitions. [2021-03-10 21:14:48,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:48,675 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:48,675 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:48,876 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-03-10 21:14:48,876 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:48,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:48,876 INFO L82 PathProgramCache]: Analyzing trace with hash 141559951, now seen corresponding path program 144 times [2021-03-10 21:14:48,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:48,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201917939] [2021-03-10 21:14:48,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:48,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:48,909 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:48,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201917939] [2021-03-10 21:14:48,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792688166] [2021-03-10 21:14:48,909 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:48,927 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:14:48,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:48,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:48,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:49,010 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:49,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:49,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-03-10 21:14:49,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419819788] [2021-03-10 21:14:49,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:14:49,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:49,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:14:49,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:14:49,010 INFO L87 Difference]: Start difference. First operand 1282 states and 3856 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) [2021-03-10 21:14:49,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:49,293 INFO L93 Difference]: Finished difference Result 1620 states and 4620 transitions. [2021-03-10 21:14:49,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:14:49,294 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 20 [2021-03-10 21:14:49,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:49,295 INFO L225 Difference]: With dead ends: 1620 [2021-03-10 21:14:49,295 INFO L226 Difference]: Without dead ends: 1614 [2021-03-10 21:14:49,295 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 257.7ms TimeCoverageRelationStatistics Valid=436, Invalid=970, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 21:14:49,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-03-10 21:14:49,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1305. [2021-03-10 21:14:49,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1305 states, 1304 states have (on average 3.013803680981595) internal successors, (3930), 1304 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:49,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1305 states to 1305 states and 3930 transitions. [2021-03-10 21:14:49,308 INFO L78 Accepts]: Start accepts. Automaton has 1305 states and 3930 transitions. Word has length 20 [2021-03-10 21:14:49,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:49,308 INFO L480 AbstractCegarLoop]: Abstraction has 1305 states and 3930 transitions. [2021-03-10 21:14:49,308 INFO L481 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) [2021-03-10 21:14:49,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1305 states and 3930 transitions. [2021-03-10 21:14:49,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:49,309 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:49,309 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:49,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:49,513 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:49,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:49,513 INFO L82 PathProgramCache]: Analyzing trace with hash 529117959, now seen corresponding path program 145 times [2021-03-10 21:14:49,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:49,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741753838] [2021-03-10 21:14:49,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:49,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:49,541 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:49,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741753838] [2021-03-10 21:14:49,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642380565] [2021-03-10 21:14:49,542 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:49,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:49,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:49,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:49,637 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:49,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:49,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-03-10 21:14:49,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431294775] [2021-03-10 21:14:49,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:14:49,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:49,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:14:49,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:14:49,638 INFO L87 Difference]: Start difference. First operand 1305 states and 3930 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:49,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:49,924 INFO L93 Difference]: Finished difference Result 1830 states and 5202 transitions. [2021-03-10 21:14:49,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:14:49,924 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:14:49,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:49,926 INFO L225 Difference]: With dead ends: 1830 [2021-03-10 21:14:49,926 INFO L226 Difference]: Without dead ends: 1828 [2021-03-10 21:14:49,926 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 236.7ms TimeCoverageRelationStatistics Valid=408, Invalid=782, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:14:49,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2021-03-10 21:14:49,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1345. [2021-03-10 21:14:49,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1344 states have (on average 3.013392857142857) internal successors, (4050), 1344 states have internal predecessors, (4050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:49,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 4050 transitions. [2021-03-10 21:14:49,940 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 4050 transitions. Word has length 20 [2021-03-10 21:14:49,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:49,940 INFO L480 AbstractCegarLoop]: Abstraction has 1345 states and 4050 transitions. [2021-03-10 21:14:49,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:49,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 4050 transitions. [2021-03-10 21:14:49,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:49,941 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:49,941 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:50,141 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2021-03-10 21:14:50,141 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:50,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:50,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1372903823, now seen corresponding path program 146 times [2021-03-10 21:14:50,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:50,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493236417] [2021-03-10 21:14:50,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:50,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:50,177 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:50,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493236417] [2021-03-10 21:14:50,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495606000] [2021-03-10 21:14:50,178 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 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 [2021-03-10 21:14:50,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:50,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:50,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:50,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:50,281 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:50,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:50,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-03-10 21:14:50,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218504742] [2021-03-10 21:14:50,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:14:50,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:50,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:14:50,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:14:50,282 INFO L87 Difference]: Start difference. First operand 1345 states and 4050 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:50,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:50,612 INFO L93 Difference]: Finished difference Result 1888 states and 5315 transitions. [2021-03-10 21:14:50,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:14:50,613 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:14:50,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:50,615 INFO L225 Difference]: With dead ends: 1888 [2021-03-10 21:14:50,615 INFO L226 Difference]: Without dead ends: 1888 [2021-03-10 21:14:50,615 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 252.5ms TimeCoverageRelationStatistics Valid=495, Invalid=837, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:14:50,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2021-03-10 21:14:50,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 1399. [2021-03-10 21:14:50,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1399 states, 1398 states have (on average 3.0257510729613735) internal successors, (4230), 1398 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:50,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 4230 transitions. [2021-03-10 21:14:50,631 INFO L78 Accepts]: Start accepts. Automaton has 1399 states and 4230 transitions. Word has length 20 [2021-03-10 21:14:50,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:50,631 INFO L480 AbstractCegarLoop]: Abstraction has 1399 states and 4230 transitions. [2021-03-10 21:14:50,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:50,631 INFO L276 IsEmpty]: Start isEmpty. Operand 1399 states and 4230 transitions. [2021-03-10 21:14:50,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:50,632 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:50,632 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:50,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-03-10 21:14:50,833 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:50,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:50,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1944358629, now seen corresponding path program 147 times [2021-03-10 21:14:50,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:50,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339698355] [2021-03-10 21:14:50,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:50,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:50,862 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:50,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339698355] [2021-03-10 21:14:50,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940090932] [2021-03-10 21:14:50,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:50,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:14:50,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:50,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:50,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:50,977 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:50,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:50,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-03-10 21:14:50,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712574374] [2021-03-10 21:14:50,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:14:50,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:50,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:14:50,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:14:50,978 INFO L87 Difference]: Start difference. First operand 1399 states and 4230 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:51,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:51,435 INFO L93 Difference]: Finished difference Result 1840 states and 5179 transitions. [2021-03-10 21:14:51,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-10 21:14:51,435 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:14:51,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:51,437 INFO L225 Difference]: With dead ends: 1840 [2021-03-10 21:14:51,437 INFO L226 Difference]: Without dead ends: 1831 [2021-03-10 21:14:51,437 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 388.2ms TimeCoverageRelationStatistics Valid=855, Invalid=1797, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 21:14:51,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2021-03-10 21:14:51,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1368. [2021-03-10 21:14:51,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1367 states have (on average 3.015362106803219) internal successors, (4122), 1367 states have internal predecessors, (4122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:51,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 4122 transitions. [2021-03-10 21:14:51,452 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 4122 transitions. Word has length 20 [2021-03-10 21:14:51,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:51,452 INFO L480 AbstractCegarLoop]: Abstraction has 1368 states and 4122 transitions. [2021-03-10 21:14:51,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:51,452 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 4122 transitions. [2021-03-10 21:14:51,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:51,453 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:51,453 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:51,653 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:51,653 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:51,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:51,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1815378865, now seen corresponding path program 148 times [2021-03-10 21:14:51,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:51,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180229450] [2021-03-10 21:14:51,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:51,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:51,686 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:51,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180229450] [2021-03-10 21:14:51,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744824001] [2021-03-10 21:14:51,687 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 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 [2021-03-10 21:14:51,703 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:14:51,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:51,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:51,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:51,783 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:51,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:51,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-03-10 21:14:51,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874518132] [2021-03-10 21:14:51,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:14:51,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:51,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:14:51,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:14:51,784 INFO L87 Difference]: Start difference. First operand 1368 states and 4122 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) [2021-03-10 21:14:52,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:52,194 INFO L93 Difference]: Finished difference Result 1834 states and 5156 transitions. [2021-03-10 21:14:52,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 21:14:52,195 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 20 [2021-03-10 21:14:52,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:52,197 INFO L225 Difference]: With dead ends: 1834 [2021-03-10 21:14:52,197 INFO L226 Difference]: Without dead ends: 1822 [2021-03-10 21:14:52,198 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 370.2ms TimeCoverageRelationStatistics Valid=776, Invalid=1774, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 21:14:52,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1822 states. [2021-03-10 21:14:52,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1822 to 1349. [2021-03-10 21:14:52,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1348 states have (on average 3.015578635014837) internal successors, (4065), 1348 states have internal predecessors, (4065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:52,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 4065 transitions. [2021-03-10 21:14:52,213 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 4065 transitions. Word has length 20 [2021-03-10 21:14:52,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:52,213 INFO L480 AbstractCegarLoop]: Abstraction has 1349 states and 4065 transitions. [2021-03-10 21:14:52,213 INFO L481 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) [2021-03-10 21:14:52,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 4065 transitions. [2021-03-10 21:14:52,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:52,214 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:52,214 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:52,414 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:52,415 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:52,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:52,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1891843109, now seen corresponding path program 149 times [2021-03-10 21:14:52,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:52,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173476585] [2021-03-10 21:14:52,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:52,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:52,470 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:52,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173476585] [2021-03-10 21:14:52,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134592982] [2021-03-10 21:14:52,470 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:52,489 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:14:52,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:52,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:52,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:52,576 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:52,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:52,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 21:14:52,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861560217] [2021-03-10 21:14:52,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:14:52,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:52,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:14:52,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:14:52,577 INFO L87 Difference]: Start difference. First operand 1349 states and 4065 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) [2021-03-10 21:14:52,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:52,950 INFO L93 Difference]: Finished difference Result 1747 states and 4974 transitions. [2021-03-10 21:14:52,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 21:14:52,950 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 [2021-03-10 21:14:52,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:52,952 INFO L225 Difference]: With dead ends: 1747 [2021-03-10 21:14:52,952 INFO L226 Difference]: Without dead ends: 1729 [2021-03-10 21:14:52,952 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 351.3ms TimeCoverageRelationStatistics Valid=746, Invalid=1804, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 21:14:52,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2021-03-10 21:14:52,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 1363. [2021-03-10 21:14:52,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 3.0198237885462555) internal successors, (4113), 1362 states have internal predecessors, (4113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:52,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 4113 transitions. [2021-03-10 21:14:52,966 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 4113 transitions. Word has length 20 [2021-03-10 21:14:52,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:52,966 INFO L480 AbstractCegarLoop]: Abstraction has 1363 states and 4113 transitions. [2021-03-10 21:14:52,966 INFO L481 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) [2021-03-10 21:14:52,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 4113 transitions. [2021-03-10 21:14:52,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:52,968 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:52,968 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:53,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:53,168 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:53,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:53,168 INFO L82 PathProgramCache]: Analyzing trace with hash 235777619, now seen corresponding path program 150 times [2021-03-10 21:14:53,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:53,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772500190] [2021-03-10 21:14:53,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:53,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:53,208 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:53,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772500190] [2021-03-10 21:14:53,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605938785] [2021-03-10 21:14:53,208 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:53,227 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:14:53,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:53,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:53,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:53,330 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:53,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:53,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:14:53,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273808161] [2021-03-10 21:14:53,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:14:53,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:53,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:14:53,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:14:53,330 INFO L87 Difference]: Start difference. First operand 1363 states and 4113 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) [2021-03-10 21:14:53,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:53,700 INFO L93 Difference]: Finished difference Result 1698 states and 4871 transitions. [2021-03-10 21:14:53,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:14:53,701 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 20 [2021-03-10 21:14:53,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:53,703 INFO L225 Difference]: With dead ends: 1698 [2021-03-10 21:14:53,703 INFO L226 Difference]: Without dead ends: 1698 [2021-03-10 21:14:53,703 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 347.5ms TimeCoverageRelationStatistics Valid=603, Invalid=1467, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 21:14:53,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2021-03-10 21:14:53,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 1400. [2021-03-10 21:14:53,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1400 states, 1399 states have (on average 3.013581129378127) internal successors, (4216), 1399 states have internal predecessors, (4216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:53,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 4216 transitions. [2021-03-10 21:14:53,717 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 4216 transitions. Word has length 20 [2021-03-10 21:14:53,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:53,717 INFO L480 AbstractCegarLoop]: Abstraction has 1400 states and 4216 transitions. [2021-03-10 21:14:53,717 INFO L481 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) [2021-03-10 21:14:53,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 4216 transitions. [2021-03-10 21:14:53,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:53,718 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:53,719 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:53,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:53,919 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:53,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:53,919 INFO L82 PathProgramCache]: Analyzing trace with hash -97333165, now seen corresponding path program 151 times [2021-03-10 21:14:53,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:53,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987459352] [2021-03-10 21:14:53,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:53,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:53,951 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:53,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987459352] [2021-03-10 21:14:53,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729098259] [2021-03-10 21:14:53,952 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:14:53,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:53,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:53,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:54,059 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:54,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:54,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-03-10 21:14:54,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877339478] [2021-03-10 21:14:54,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:14:54,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:54,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:14:54,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:14:54,060 INFO L87 Difference]: Start difference. First operand 1400 states and 4216 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) [2021-03-10 21:14:54,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:54,395 INFO L93 Difference]: Finished difference Result 1946 states and 5516 transitions. [2021-03-10 21:14:54,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:14:54,396 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 20 [2021-03-10 21:14:54,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:54,397 INFO L225 Difference]: With dead ends: 1946 [2021-03-10 21:14:54,397 INFO L226 Difference]: Without dead ends: 1946 [2021-03-10 21:14:54,398 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 290.3ms TimeCoverageRelationStatistics Valid=468, Invalid=1092, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 21:14:54,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1946 states. [2021-03-10 21:14:54,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1946 to 1486. [2021-03-10 21:14:54,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1485 states have (on average 3.0202020202020203) internal successors, (4485), 1485 states have internal predecessors, (4485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:54,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 4485 transitions. [2021-03-10 21:14:54,413 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 4485 transitions. Word has length 20 [2021-03-10 21:14:54,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:54,413 INFO L480 AbstractCegarLoop]: Abstraction has 1486 states and 4485 transitions. [2021-03-10 21:14:54,413 INFO L481 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) [2021-03-10 21:14:54,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 4485 transitions. [2021-03-10 21:14:54,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:54,414 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:54,414 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:54,614 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-03-10 21:14:54,615 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:54,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:54,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1138847315, now seen corresponding path program 152 times [2021-03-10 21:14:54,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:54,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728079157] [2021-03-10 21:14:54,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:54,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:54,644 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:54,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728079157] [2021-03-10 21:14:54,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264568328] [2021-03-10 21:14:54,645 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 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 [2021-03-10 21:14:54,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:54,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:54,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:54,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:54,749 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:54,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:54,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-03-10 21:14:54,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764638292] [2021-03-10 21:14:54,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:14:54,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:54,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:14:54,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:14:54,750 INFO L87 Difference]: Start difference. First operand 1486 states and 4485 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:55,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:55,067 INFO L93 Difference]: Finished difference Result 2146 states and 6136 transitions. [2021-03-10 21:14:55,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:14:55,068 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:14:55,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:55,070 INFO L225 Difference]: With dead ends: 2146 [2021-03-10 21:14:55,070 INFO L226 Difference]: Without dead ends: 2146 [2021-03-10 21:14:55,070 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 261.0ms TimeCoverageRelationStatistics Valid=438, Invalid=894, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:14:55,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2146 states. [2021-03-10 21:14:55,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2146 to 1603. [2021-03-10 21:14:55,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 1602 states have (on average 3.034956304619226) internal successors, (4862), 1602 states have internal predecessors, (4862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:55,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 4862 transitions. [2021-03-10 21:14:55,090 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 4862 transitions. Word has length 20 [2021-03-10 21:14:55,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:55,090 INFO L480 AbstractCegarLoop]: Abstraction has 1603 states and 4862 transitions. [2021-03-10 21:14:55,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:55,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 4862 transitions. [2021-03-10 21:14:55,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:55,091 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:55,091 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:55,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable255,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:55,293 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:55,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:55,293 INFO L82 PathProgramCache]: Analyzing trace with hash -622391213, now seen corresponding path program 153 times [2021-03-10 21:14:55,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:55,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174254843] [2021-03-10 21:14:55,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:55,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:55,318 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:55,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174254843] [2021-03-10 21:14:55,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448199528] [2021-03-10 21:14:55,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:55,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:14:55,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:55,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:55,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:55,424 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:55,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:55,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-03-10 21:14:55,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483524701] [2021-03-10 21:14:55,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:14:55,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:55,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:14:55,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:14:55,424 INFO L87 Difference]: Start difference. First operand 1603 states and 4862 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:55,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:55,739 INFO L93 Difference]: Finished difference Result 2514 states and 7203 transitions. [2021-03-10 21:14:55,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:14:55,740 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-03-10 21:14:55,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:55,742 INFO L225 Difference]: With dead ends: 2514 [2021-03-10 21:14:55,742 INFO L226 Difference]: Without dead ends: 2514 [2021-03-10 21:14:55,742 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 262.5ms TimeCoverageRelationStatistics Valid=491, Invalid=841, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:14:55,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-03-10 21:14:55,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 1911. [2021-03-10 21:14:55,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1910 states have (on average 3.0701570680628274) internal successors, (5864), 1910 states have internal predecessors, (5864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:55,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 5864 transitions. [2021-03-10 21:14:55,764 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 5864 transitions. Word has length 20 [2021-03-10 21:14:55,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:55,764 INFO L480 AbstractCegarLoop]: Abstraction has 1911 states and 5864 transitions. [2021-03-10 21:14:55,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:55,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 5864 transitions. [2021-03-10 21:14:55,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:55,766 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:55,766 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:55,966 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-03-10 21:14:55,966 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:55,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:55,967 INFO L82 PathProgramCache]: Analyzing trace with hash -50936407, now seen corresponding path program 154 times [2021-03-10 21:14:55,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:55,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067943171] [2021-03-10 21:14:55,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:55,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:55,991 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:55,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067943171] [2021-03-10 21:14:55,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502280752] [2021-03-10 21:14:55,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:56,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:14:56,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:56,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:56,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:56,093 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:56,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:56,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-03-10 21:14:56,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480339324] [2021-03-10 21:14:56,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:14:56,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:56,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:14:56,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:14:56,093 INFO L87 Difference]: Start difference. First operand 1911 states and 5864 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:56,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:56,619 INFO L93 Difference]: Finished difference Result 2413 states and 6919 transitions. [2021-03-10 21:14:56,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-10 21:14:56,619 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-03-10 21:14:56,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:56,622 INFO L225 Difference]: With dead ends: 2413 [2021-03-10 21:14:56,622 INFO L226 Difference]: Without dead ends: 2407 [2021-03-10 21:14:56,622 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 451.1ms TimeCoverageRelationStatistics Valid=988, Invalid=2204, Unknown=0, NotChecked=0, Total=3192 [2021-03-10 21:14:56,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2407 states. [2021-03-10 21:14:56,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2407 to 1890. [2021-03-10 21:14:56,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1890 states, 1889 states have (on average 3.062466913710958) internal successors, (5785), 1889 states have internal predecessors, (5785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:56,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 5785 transitions. [2021-03-10 21:14:56,649 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 5785 transitions. Word has length 20 [2021-03-10 21:14:56,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:56,649 INFO L480 AbstractCegarLoop]: Abstraction has 1890 states and 5785 transitions. [2021-03-10 21:14:56,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:56,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 5785 transitions. [2021-03-10 21:14:56,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:56,651 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:56,651 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:56,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-03-10 21:14:56,851 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:56,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:56,852 INFO L82 PathProgramCache]: Analyzing trace with hash 484293395, now seen corresponding path program 155 times [2021-03-10 21:14:56,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:56,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539823338] [2021-03-10 21:14:56,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:56,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:56,880 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:56,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539823338] [2021-03-10 21:14:56,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034573827] [2021-03-10 21:14:56,880 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:56,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:14:56,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:56,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:56,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:56,982 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:56,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:56,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-03-10 21:14:56,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444476997] [2021-03-10 21:14:56,982 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:14:56,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:56,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:14:56,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:14:56,983 INFO L87 Difference]: Start difference. First operand 1890 states and 5785 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:57,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:57,434 INFO L93 Difference]: Finished difference Result 2435 states and 6986 transitions. [2021-03-10 21:14:57,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-10 21:14:57,435 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:14:57,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:57,437 INFO L225 Difference]: With dead ends: 2435 [2021-03-10 21:14:57,437 INFO L226 Difference]: Without dead ends: 2423 [2021-03-10 21:14:57,438 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 402.6ms TimeCoverageRelationStatistics Valid=842, Invalid=2020, Unknown=0, NotChecked=0, Total=2862 [2021-03-10 21:14:57,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2423 states. [2021-03-10 21:14:57,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2423 to 1924. [2021-03-10 21:14:57,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1924 states, 1923 states have (on average 3.068642745709828) internal successors, (5901), 1923 states have internal predecessors, (5901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:57,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 5901 transitions. [2021-03-10 21:14:57,459 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 5901 transitions. Word has length 20 [2021-03-10 21:14:57,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:57,459 INFO L480 AbstractCegarLoop]: Abstraction has 1924 states and 5901 transitions. [2021-03-10 21:14:57,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:57,459 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 5901 transitions. [2021-03-10 21:14:57,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:57,461 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:57,461 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:57,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2021-03-10 21:14:57,662 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:57,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:57,662 INFO L82 PathProgramCache]: Analyzing trace with hash -103451927, now seen corresponding path program 156 times [2021-03-10 21:14:57,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:57,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672797107] [2021-03-10 21:14:57,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:57,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:57,695 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:57,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672797107] [2021-03-10 21:14:57,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200494570] [2021-03-10 21:14:57,696 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:57,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:14:57,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:57,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:57,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:57,814 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:57,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:57,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-03-10 21:14:57,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244588117] [2021-03-10 21:14:57,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:14:57,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:57,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:14:57,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:14:57,815 INFO L87 Difference]: Start difference. First operand 1924 states and 5901 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) [2021-03-10 21:14:58,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:58,240 INFO L93 Difference]: Finished difference Result 2515 states and 7235 transitions. [2021-03-10 21:14:58,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 21:14:58,241 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 20 [2021-03-10 21:14:58,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:58,243 INFO L225 Difference]: With dead ends: 2515 [2021-03-10 21:14:58,243 INFO L226 Difference]: Without dead ends: 2497 [2021-03-10 21:14:58,244 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 395.0ms TimeCoverageRelationStatistics Valid=743, Invalid=1909, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 21:14:58,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2021-03-10 21:14:58,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 1989. [2021-03-10 21:14:58,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1989 states, 1988 states have (on average 3.0759557344064388) internal successors, (6115), 1988 states have internal predecessors, (6115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:58,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1989 states to 1989 states and 6115 transitions. [2021-03-10 21:14:58,265 INFO L78 Accepts]: Start accepts. Automaton has 1989 states and 6115 transitions. Word has length 20 [2021-03-10 21:14:58,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:58,265 INFO L480 AbstractCegarLoop]: Abstraction has 1989 states and 6115 transitions. [2021-03-10 21:14:58,265 INFO L481 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) [2021-03-10 21:14:58,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1989 states and 6115 transitions. [2021-03-10 21:14:58,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:14:58,267 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:58,267 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:58,467 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:58,467 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:58,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:58,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1143687725, now seen corresponding path program 157 times [2021-03-10 21:14:58,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:58,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978621069] [2021-03-10 21:14:58,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:58,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:58,507 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:58,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978621069] [2021-03-10 21:14:58,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818483591] [2021-03-10 21:14:58,507 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:58,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:58,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:14:58,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:58,618 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:58,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:58,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 21:14:58,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124053382] [2021-03-10 21:14:58,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:14:58,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:58,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:14:58,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:14:58,619 INFO L87 Difference]: Start difference. First operand 1989 states and 6115 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) [2021-03-10 21:14:59,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:59,020 INFO L93 Difference]: Finished difference Result 2460 states and 7169 transitions. [2021-03-10 21:14:59,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 21:14:59,020 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 20 [2021-03-10 21:14:59,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:59,023 INFO L225 Difference]: With dead ends: 2460 [2021-03-10 21:14:59,023 INFO L226 Difference]: Without dead ends: 2436 [2021-03-10 21:14:59,023 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 361.2ms TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 21:14:59,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2021-03-10 21:14:59,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 2023. [2021-03-10 21:14:59,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2023 states, 2022 states have (on average 3.073689416419387) internal successors, (6215), 2022 states have internal predecessors, (6215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:59,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2023 states to 2023 states and 6215 transitions. [2021-03-10 21:14:59,045 INFO L78 Accepts]: Start accepts. Automaton has 2023 states and 6215 transitions. Word has length 20 [2021-03-10 21:14:59,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:59,045 INFO L480 AbstractCegarLoop]: Abstraction has 2023 states and 6215 transitions. [2021-03-10 21:14:59,045 INFO L481 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) [2021-03-10 21:14:59,045 INFO L276 IsEmpty]: Start isEmpty. Operand 2023 states and 6215 transitions. [2021-03-10 21:14:59,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:14:59,047 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:59,047 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:59,247 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2021-03-10 21:14:59,247 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:59,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:59,248 INFO L82 PathProgramCache]: Analyzing trace with hash -950598133, now seen corresponding path program 158 times [2021-03-10 21:14:59,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:59,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689575690] [2021-03-10 21:14:59,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:59,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:59,387 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:59,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689575690] [2021-03-10 21:14:59,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280166721] [2021-03-10 21:14:59,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:59,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:59,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:59,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:14:59,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:59,520 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:59,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:59,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 21:14:59,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62697244] [2021-03-10 21:14:59,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:14:59,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:59,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:14:59,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:14:59,521 INFO L87 Difference]: Start difference. First operand 2023 states and 6215 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:59,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:59,866 INFO L93 Difference]: Finished difference Result 2290 states and 6704 transitions. [2021-03-10 21:14:59,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:14:59,867 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:14:59,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:59,870 INFO L225 Difference]: With dead ends: 2290 [2021-03-10 21:14:59,870 INFO L226 Difference]: Without dead ends: 2264 [2021-03-10 21:14:59,870 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 282.5ms TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:14:59,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-03-10 21:14:59,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 2067. [2021-03-10 21:14:59,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2067 states, 2066 states have (on average 3.054211035818006) internal successors, (6310), 2066 states have internal predecessors, (6310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:59,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2067 states to 2067 states and 6310 transitions. [2021-03-10 21:14:59,903 INFO L78 Accepts]: Start accepts. Automaton has 2067 states and 6310 transitions. Word has length 21 [2021-03-10 21:14:59,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:59,903 INFO L480 AbstractCegarLoop]: Abstraction has 2067 states and 6310 transitions. [2021-03-10 21:14:59,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:59,903 INFO L276 IsEmpty]: Start isEmpty. Operand 2067 states and 6310 transitions. [2021-03-10 21:14:59,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:14:59,905 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:59,905 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:00,105 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:00,106 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:00,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:00,106 INFO L82 PathProgramCache]: Analyzing trace with hash 2035301631, now seen corresponding path program 159 times [2021-03-10 21:15:00,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:00,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030722744] [2021-03-10 21:15:00,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:00,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:00,225 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:00,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030722744] [2021-03-10 21:15:00,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943010286] [2021-03-10 21:15:00,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:00,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:15:00,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:00,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:15:00,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:00,347 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:00,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:00,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 21:15:00,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840592044] [2021-03-10 21:15:00,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:15:00,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:00,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:15:00,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:15:00,348 INFO L87 Difference]: Start difference. First operand 2067 states and 6310 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:00,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:00,544 INFO L93 Difference]: Finished difference Result 2347 states and 6861 transitions. [2021-03-10 21:15:00,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:15:00,545 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:15:00,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:00,548 INFO L225 Difference]: With dead ends: 2347 [2021-03-10 21:15:00,548 INFO L226 Difference]: Without dead ends: 2340 [2021-03-10 21:15:00,548 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 212.5ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:15:00,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2340 states. [2021-03-10 21:15:00,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2340 to 2120. [2021-03-10 21:15:00,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2120 states, 2119 states have (on average 3.06465313827277) internal successors, (6494), 2119 states have internal predecessors, (6494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:00,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 6494 transitions. [2021-03-10 21:15:00,570 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 6494 transitions. Word has length 21 [2021-03-10 21:15:00,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:00,570 INFO L480 AbstractCegarLoop]: Abstraction has 2120 states and 6494 transitions. [2021-03-10 21:15:00,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:00,570 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 6494 transitions. [2021-03-10 21:15:00,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:15:00,572 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:00,572 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:00,773 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:00,773 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:00,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:00,773 INFO L82 PathProgramCache]: Analyzing trace with hash -644962941, now seen corresponding path program 160 times [2021-03-10 21:15:00,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:00,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389874376] [2021-03-10 21:15:00,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:00,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:00,879 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:00,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389874376] [2021-03-10 21:15:00,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481412340] [2021-03-10 21:15:00,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:00,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:15:00,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:00,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:15:00,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:01,023 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:01,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:01,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 21:15:01,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874963025] [2021-03-10 21:15:01,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:15:01,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:01,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:15:01,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:15:01,024 INFO L87 Difference]: Start difference. First operand 2120 states and 6494 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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) [2021-03-10 21:15:01,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:01,297 INFO L93 Difference]: Finished difference Result 2333 states and 6841 transitions. [2021-03-10 21:15:01,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:15:01,298 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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 21 [2021-03-10 21:15:01,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:01,301 INFO L225 Difference]: With dead ends: 2333 [2021-03-10 21:15:01,301 INFO L226 Difference]: Without dead ends: 2317 [2021-03-10 21:15:01,301 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 239.3ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:15:01,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2317 states. [2021-03-10 21:15:01,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2317 to 2083. [2021-03-10 21:15:01,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2083 states, 2082 states have (on average 3.063400576368876) internal successors, (6378), 2082 states have internal predecessors, (6378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:01,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 6378 transitions. [2021-03-10 21:15:01,324 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 6378 transitions. Word has length 21 [2021-03-10 21:15:01,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:01,324 INFO L480 AbstractCegarLoop]: Abstraction has 2083 states and 6378 transitions. [2021-03-10 21:15:01,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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) [2021-03-10 21:15:01,324 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 6378 transitions. [2021-03-10 21:15:01,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:15:01,326 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:01,326 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:01,526 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-03-10 21:15:01,526 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:01,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:01,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1688210859, now seen corresponding path program 161 times [2021-03-10 21:15:01,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:01,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582849501] [2021-03-10 21:15:01,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:01,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:01,659 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:01,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582849501] [2021-03-10 21:15:01,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069980573] [2021-03-10 21:15:01,660 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:01,680 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:15:01,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:01,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:15:01,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:01,867 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:01,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:01,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 21:15:01,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444282299] [2021-03-10 21:15:01,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:15:01,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:01,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:15:01,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:15:01,868 INFO L87 Difference]: Start difference. First operand 2083 states and 6378 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:02,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:02,201 INFO L93 Difference]: Finished difference Result 2307 states and 6745 transitions. [2021-03-10 21:15:02,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:15:02,202 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:15:02,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:02,205 INFO L225 Difference]: With dead ends: 2307 [2021-03-10 21:15:02,205 INFO L226 Difference]: Without dead ends: 2300 [2021-03-10 21:15:02,205 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 274.7ms TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:15:02,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2300 states. [2021-03-10 21:15:02,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2300 to 2083. [2021-03-10 21:15:02,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2083 states, 2082 states have (on average 3.063400576368876) internal successors, (6378), 2082 states have internal predecessors, (6378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:02,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 6378 transitions. [2021-03-10 21:15:02,229 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 6378 transitions. Word has length 21 [2021-03-10 21:15:02,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:02,230 INFO L480 AbstractCegarLoop]: Abstraction has 2083 states and 6378 transitions. [2021-03-10 21:15:02,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:02,230 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 6378 transitions. [2021-03-10 21:15:02,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:15:02,232 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:02,232 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:02,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:02,433 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:02,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:02,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1152981057, now seen corresponding path program 162 times [2021-03-10 21:15:02,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:02,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917667361] [2021-03-10 21:15:02,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:02,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:02,561 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:02,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917667361] [2021-03-10 21:15:02,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899143553] [2021-03-10 21:15:02,561 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:02,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:15:02,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:02,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:15:02,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:02,725 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:02,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:02,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 21:15:02,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538351882] [2021-03-10 21:15:02,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:15:02,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:02,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:15:02,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:15:02,725 INFO L87 Difference]: Start difference. First operand 2083 states and 6378 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:02,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:02,998 INFO L93 Difference]: Finished difference Result 2324 states and 6770 transitions. [2021-03-10 21:15:02,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:15:02,999 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:15:02,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:03,002 INFO L225 Difference]: With dead ends: 2324 [2021-03-10 21:15:03,002 INFO L226 Difference]: Without dead ends: 2317 [2021-03-10 21:15:03,002 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 284.1ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:15:03,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2317 states. [2021-03-10 21:15:03,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2317 to 2083. [2021-03-10 21:15:03,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2083 states, 2082 states have (on average 3.063400576368876) internal successors, (6378), 2082 states have internal predecessors, (6378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:03,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 6378 transitions. [2021-03-10 21:15:03,023 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 6378 transitions. Word has length 21 [2021-03-10 21:15:03,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:03,023 INFO L480 AbstractCegarLoop]: Abstraction has 2083 states and 6378 transitions. [2021-03-10 21:15:03,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:03,023 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 6378 transitions. [2021-03-10 21:15:03,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:15:03,025 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:03,025 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:03,226 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:03,226 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:03,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:03,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1740726379, now seen corresponding path program 163 times [2021-03-10 21:15:03,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:03,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704603932] [2021-03-10 21:15:03,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:03,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:03,352 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:03,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704603932] [2021-03-10 21:15:03,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969870339] [2021-03-10 21:15:03,352 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 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 [2021-03-10 21:15:03,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:03,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:15:03,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:03,502 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:03,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:03,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 21:15:03,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974622448] [2021-03-10 21:15:03,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:15:03,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:03,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:15:03,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:15:03,503 INFO L87 Difference]: Start difference. First operand 2083 states and 6378 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:03,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:03,821 INFO L93 Difference]: Finished difference Result 2260 states and 6660 transitions. [2021-03-10 21:15:03,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:15:03,821 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:15:03,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:03,824 INFO L225 Difference]: With dead ends: 2260 [2021-03-10 21:15:03,824 INFO L226 Difference]: Without dead ends: 2253 [2021-03-10 21:15:03,824 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 267.3ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:15:03,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2253 states. [2021-03-10 21:15:03,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2253 to 2083. [2021-03-10 21:15:03,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2083 states, 2082 states have (on average 3.063400576368876) internal successors, (6378), 2082 states have internal predecessors, (6378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:03,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 6378 transitions. [2021-03-10 21:15:03,848 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 6378 transitions. Word has length 21 [2021-03-10 21:15:03,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:03,848 INFO L480 AbstractCegarLoop]: Abstraction has 2083 states and 6378 transitions. [2021-03-10 21:15:03,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:03,848 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 6378 transitions. [2021-03-10 21:15:03,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:15:03,850 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:03,850 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:04,050 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-03-10 21:15:04,051 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:04,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:04,051 INFO L82 PathProgramCache]: Analyzing trace with hash -922738373, now seen corresponding path program 164 times [2021-03-10 21:15:04,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:04,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109252771] [2021-03-10 21:15:04,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:04,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:04,169 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:04,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109252771] [2021-03-10 21:15:04,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83904437] [2021-03-10 21:15:04,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:15:04,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:15:04,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:04,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:15:04,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:04,314 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:04,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:04,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2021-03-10 21:15:04,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359524784] [2021-03-10 21:15:04,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:15:04,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:04,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:15:04,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:15:04,314 INFO L87 Difference]: Start difference. First operand 2083 states and 6378 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 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) [2021-03-10 21:15:04,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:04,507 INFO L93 Difference]: Finished difference Result 2270 states and 6764 transitions. [2021-03-10 21:15:04,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:15:04,507 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 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 21 [2021-03-10 21:15:04,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:04,510 INFO L225 Difference]: With dead ends: 2270 [2021-03-10 21:15:04,510 INFO L226 Difference]: Without dead ends: 2263 [2021-03-10 21:15:04,510 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 219.1ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:15:04,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2263 states. [2021-03-10 21:15:04,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2263 to 2113. [2021-03-10 21:15:04,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 3.071022727272727) internal successors, (6486), 2112 states have internal predecessors, (6486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:04,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 6486 transitions. [2021-03-10 21:15:04,533 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 6486 transitions. Word has length 21 [2021-03-10 21:15:04,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:04,533 INFO L480 AbstractCegarLoop]: Abstraction has 2113 states and 6486 transitions. [2021-03-10 21:15:04,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 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) [2021-03-10 21:15:04,534 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 6486 transitions. [2021-03-10 21:15:04,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:15:04,535 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:04,536 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:04,750 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-03-10 21:15:04,750 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:04,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:04,750 INFO L82 PathProgramCache]: Analyzing trace with hash 691964351, now seen corresponding path program 165 times [2021-03-10 21:15:04,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:04,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431736953] [2021-03-10 21:15:04,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:04,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:04,864 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:04,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431736953] [2021-03-10 21:15:04,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197258755] [2021-03-10 21:15:04,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:04,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:15:04,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:04,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:15:04,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:05,022 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:05,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:05,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2021-03-10 21:15:05,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119226815] [2021-03-10 21:15:05,022 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:15:05,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:05,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:15:05,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:15:05,023 INFO L87 Difference]: Start difference. First operand 2113 states and 6486 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:05,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:05,212 INFO L93 Difference]: Finished difference Result 2271 states and 6761 transitions. [2021-03-10 21:15:05,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:15:05,213 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:15:05,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:05,216 INFO L225 Difference]: With dead ends: 2271 [2021-03-10 21:15:05,216 INFO L226 Difference]: Without dead ends: 2262 [2021-03-10 21:15:05,216 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 250.0ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:15:05,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2021-03-10 21:15:05,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 2113. [2021-03-10 21:15:05,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 3.069128787878788) internal successors, (6482), 2112 states have internal predecessors, (6482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:05,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 6482 transitions. [2021-03-10 21:15:05,241 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 6482 transitions. Word has length 21 [2021-03-10 21:15:05,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:05,241 INFO L480 AbstractCegarLoop]: Abstraction has 2113 states and 6482 transitions. [2021-03-10 21:15:05,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:05,241 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 6482 transitions. [2021-03-10 21:15:05,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:15:05,244 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:05,244 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:05,459 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2021-03-10 21:15:05,459 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:05,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:05,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1387329477, now seen corresponding path program 166 times [2021-03-10 21:15:05,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:05,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450959961] [2021-03-10 21:15:05,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:05,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:05,568 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:05,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450959961] [2021-03-10 21:15:05,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310746770] [2021-03-10 21:15:05,568 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:05,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:15:05,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:05,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:15:05,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:05,728 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:05,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:05,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2021-03-10 21:15:05,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601631625] [2021-03-10 21:15:05,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:15:05,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:05,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:15:05,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:15:05,729 INFO L87 Difference]: Start difference. First operand 2113 states and 6482 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:05,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:05,923 INFO L93 Difference]: Finished difference Result 2235 states and 6688 transitions. [2021-03-10 21:15:05,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:15:05,924 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:15:05,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:05,927 INFO L225 Difference]: With dead ends: 2235 [2021-03-10 21:15:05,927 INFO L226 Difference]: Without dead ends: 2228 [2021-03-10 21:15:05,927 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 231.4ms TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:15:05,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2228 states. [2021-03-10 21:15:05,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2228 to 2113. [2021-03-10 21:15:05,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 3.069128787878788) internal successors, (6482), 2112 states have internal predecessors, (6482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:05,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 6482 transitions. [2021-03-10 21:15:05,949 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 6482 transitions. Word has length 21 [2021-03-10 21:15:05,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:05,949 INFO L480 AbstractCegarLoop]: Abstraction has 2113 states and 6482 transitions. [2021-03-10 21:15:05,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:05,949 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 6482 transitions. [2021-03-10 21:15:05,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:15:05,951 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:05,951 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:06,151 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:06,151 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:06,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:06,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1867302015, now seen corresponding path program 167 times [2021-03-10 21:15:06,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:06,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227443501] [2021-03-10 21:15:06,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:06,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:06,285 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:06,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227443501] [2021-03-10 21:15:06,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708464202] [2021-03-10 21:15:06,285 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:06,303 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:15:06,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:06,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:15:06,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:06,426 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:06,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:06,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-03-10 21:15:06,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186486374] [2021-03-10 21:15:06,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:15:06,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:06,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:15:06,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:15:06,426 INFO L87 Difference]: Start difference. First operand 2113 states and 6482 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:06,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:06,674 INFO L93 Difference]: Finished difference Result 2462 states and 7260 transitions. [2021-03-10 21:15:06,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:15:06,674 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:15:06,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:06,677 INFO L225 Difference]: With dead ends: 2462 [2021-03-10 21:15:06,677 INFO L226 Difference]: Without dead ends: 2445 [2021-03-10 21:15:06,678 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 276.5ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:15:06,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2445 states. [2021-03-10 21:15:06,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2445 to 2200. [2021-03-10 21:15:06,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2200 states, 2199 states have (on average 3.083674397453388) internal successors, (6781), 2199 states have internal predecessors, (6781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:06,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2200 states to 2200 states and 6781 transitions. [2021-03-10 21:15:06,705 INFO L78 Accepts]: Start accepts. Automaton has 2200 states and 6781 transitions. Word has length 21 [2021-03-10 21:15:06,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:06,706 INFO L480 AbstractCegarLoop]: Abstraction has 2200 states and 6781 transitions. [2021-03-10 21:15:06,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:06,706 INFO L276 IsEmpty]: Start isEmpty. Operand 2200 states and 6781 transitions. [2021-03-10 21:15:06,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:15:06,708 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:06,708 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:06,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-03-10 21:15:06,908 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:06,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:06,909 INFO L82 PathProgramCache]: Analyzing trace with hash -812962557, now seen corresponding path program 168 times [2021-03-10 21:15:06,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:06,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126180211] [2021-03-10 21:15:06,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:06,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:07,024 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:07,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126180211] [2021-03-10 21:15:07,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506473065] [2021-03-10 21:15:07,024 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:15:07,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:15:07,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:07,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:15:07,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:07,171 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:07,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:07,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-03-10 21:15:07,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823812829] [2021-03-10 21:15:07,171 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:15:07,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:07,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:15:07,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:15:07,172 INFO L87 Difference]: Start difference. First operand 2200 states and 6781 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 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) [2021-03-10 21:15:07,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:07,404 INFO L93 Difference]: Finished difference Result 2464 states and 7241 transitions. [2021-03-10 21:15:07,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:15:07,404 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 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 21 [2021-03-10 21:15:07,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:07,407 INFO L225 Difference]: With dead ends: 2464 [2021-03-10 21:15:07,407 INFO L226 Difference]: Without dead ends: 2446 [2021-03-10 21:15:07,407 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 258.8ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:15:07,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2446 states. [2021-03-10 21:15:07,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2446 to 2176. [2021-03-10 21:15:07,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 3.0744827586206895) internal successors, (6687), 2175 states have internal predecessors, (6687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:07,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 6687 transitions. [2021-03-10 21:15:07,431 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 6687 transitions. Word has length 21 [2021-03-10 21:15:07,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:07,431 INFO L480 AbstractCegarLoop]: Abstraction has 2176 states and 6687 transitions. [2021-03-10 21:15:07,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 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) [2021-03-10 21:15:07,431 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 6687 transitions. [2021-03-10 21:15:07,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:15:07,433 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:07,433 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:07,634 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:07,634 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:07,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:07,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1402710911, now seen corresponding path program 169 times [2021-03-10 21:15:07,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:07,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778502414] [2021-03-10 21:15:07,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:07,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:07,750 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:07,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778502414] [2021-03-10 21:15:07,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499722825] [2021-03-10 21:15:07,751 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:07,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:07,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:15:07,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:07,896 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:07,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:07,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-03-10 21:15:07,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192777496] [2021-03-10 21:15:07,896 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:15:07,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:07,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:15:07,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:15:07,897 INFO L87 Difference]: Start difference. First operand 2176 states and 6687 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 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) [2021-03-10 21:15:08,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:08,167 INFO L93 Difference]: Finished difference Result 2405 states and 7080 transitions. [2021-03-10 21:15:08,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:15:08,168 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 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 21 [2021-03-10 21:15:08,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:08,171 INFO L225 Difference]: With dead ends: 2405 [2021-03-10 21:15:08,171 INFO L226 Difference]: Without dead ends: 2383 [2021-03-10 21:15:08,171 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 259.6ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:15:08,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2383 states. [2021-03-10 21:15:08,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2383 to 2168. [2021-03-10 21:15:08,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2168 states, 2167 states have (on average 3.0724503922473465) internal successors, (6658), 2167 states have internal predecessors, (6658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:08,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2168 states to 2168 states and 6658 transitions. [2021-03-10 21:15:08,194 INFO L78 Accepts]: Start accepts. Automaton has 2168 states and 6658 transitions. Word has length 21 [2021-03-10 21:15:08,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:08,194 INFO L480 AbstractCegarLoop]: Abstraction has 2168 states and 6658 transitions. [2021-03-10 21:15:08,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 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) [2021-03-10 21:15:08,194 INFO L276 IsEmpty]: Start isEmpty. Operand 2168 states and 6658 transitions. [2021-03-10 21:15:08,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:15:08,196 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:08,196 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:08,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:08,397 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:08,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:08,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1369111683, now seen corresponding path program 170 times [2021-03-10 21:15:08,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:08,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418904805] [2021-03-10 21:15:08,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:08,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:08,517 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:08,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418904805] [2021-03-10 21:15:08,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282827556] [2021-03-10 21:15:08,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:15:08,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:15:08,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:08,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:15:08,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:08,683 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:08,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:08,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-03-10 21:15:08,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892195332] [2021-03-10 21:15:08,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:15:08,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:08,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:15:08,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:15:08,684 INFO L87 Difference]: Start difference. First operand 2168 states and 6658 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 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) [2021-03-10 21:15:08,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:08,900 INFO L93 Difference]: Finished difference Result 2338 states and 6943 transitions. [2021-03-10 21:15:08,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:15:08,900 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 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 21 [2021-03-10 21:15:08,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:08,903 INFO L225 Difference]: With dead ends: 2338 [2021-03-10 21:15:08,903 INFO L226 Difference]: Without dead ends: 2331 [2021-03-10 21:15:08,903 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 257.8ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:15:08,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2021-03-10 21:15:08,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 2168. [2021-03-10 21:15:08,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2168 states, 2167 states have (on average 3.0724503922473465) internal successors, (6658), 2167 states have internal predecessors, (6658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:08,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2168 states to 2168 states and 6658 transitions. [2021-03-10 21:15:08,926 INFO L78 Accepts]: Start accepts. Automaton has 2168 states and 6658 transitions. Word has length 21 [2021-03-10 21:15:08,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:08,926 INFO L480 AbstractCegarLoop]: Abstraction has 2168 states and 6658 transitions. [2021-03-10 21:15:08,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 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) [2021-03-10 21:15:08,926 INFO L276 IsEmpty]: Start isEmpty. Operand 2168 states and 6658 transitions. [2021-03-10 21:15:08,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:15:08,928 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:08,928 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:09,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:09,128 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:09,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:09,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1898222891, now seen corresponding path program 171 times [2021-03-10 21:15:09,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:09,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535151983] [2021-03-10 21:15:09,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:09,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:09,227 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:09,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535151983] [2021-03-10 21:15:09,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421753486] [2021-03-10 21:15:09,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:15:09,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:15:09,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:09,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:15:09,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:09,365 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:09,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:09,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2021-03-10 21:15:09,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789140816] [2021-03-10 21:15:09,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:15:09,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:09,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:15:09,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:15:09,366 INFO L87 Difference]: Start difference. First operand 2168 states and 6658 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 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) [2021-03-10 21:15:09,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:09,543 INFO L93 Difference]: Finished difference Result 2327 states and 6929 transitions. [2021-03-10 21:15:09,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:15:09,544 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 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 21 [2021-03-10 21:15:09,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:09,547 INFO L225 Difference]: With dead ends: 2327 [2021-03-10 21:15:09,547 INFO L226 Difference]: Without dead ends: 2314 [2021-03-10 21:15:09,547 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 216.3ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:15:09,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2021-03-10 21:15:09,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 2158. [2021-03-10 21:15:09,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2158 states, 2157 states have (on average 3.0686138154844693) internal successors, (6619), 2157 states have internal predecessors, (6619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:09,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2158 states to 2158 states and 6619 transitions. [2021-03-10 21:15:09,571 INFO L78 Accepts]: Start accepts. Automaton has 2158 states and 6619 transitions. Word has length 21 [2021-03-10 21:15:09,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:09,571 INFO L480 AbstractCegarLoop]: Abstraction has 2158 states and 6619 transitions. [2021-03-10 21:15:09,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 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) [2021-03-10 21:15:09,571 INFO L276 IsEmpty]: Start isEmpty. Operand 2158 states and 6619 transitions. [2021-03-10 21:15:09,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:15:09,573 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:09,573 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:09,779 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-03-10 21:15:09,779 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:09,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:09,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1835759173, now seen corresponding path program 172 times [2021-03-10 21:15:09,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:09,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377499392] [2021-03-10 21:15:09,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:09,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:09,929 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:09,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377499392] [2021-03-10 21:15:09,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094271857] [2021-03-10 21:15:09,929 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:09,948 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:15:09,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:09,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:15:09,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:10,064 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:10,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:10,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-03-10 21:15:10,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526534949] [2021-03-10 21:15:10,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:15:10,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:10,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:15:10,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:15:10,065 INFO L87 Difference]: Start difference. First operand 2158 states and 6619 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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) [2021-03-10 21:15:10,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:10,333 INFO L93 Difference]: Finished difference Result 2518 states and 7412 transitions. [2021-03-10 21:15:10,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:15:10,333 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 21 [2021-03-10 21:15:10,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:10,336 INFO L225 Difference]: With dead ends: 2518 [2021-03-10 21:15:10,336 INFO L226 Difference]: Without dead ends: 2501 [2021-03-10 21:15:10,337 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 276.8ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:15:10,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2501 states. [2021-03-10 21:15:10,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2501 to 2261. [2021-03-10 21:15:10,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2261 states, 2260 states have (on average 3.084070796460177) internal successors, (6970), 2260 states have internal predecessors, (6970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:10,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2261 states to 2261 states and 6970 transitions. [2021-03-10 21:15:10,361 INFO L78 Accepts]: Start accepts. Automaton has 2261 states and 6970 transitions. Word has length 21 [2021-03-10 21:15:10,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:10,361 INFO L480 AbstractCegarLoop]: Abstraction has 2261 states and 6970 transitions. [2021-03-10 21:15:10,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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) [2021-03-10 21:15:10,362 INFO L276 IsEmpty]: Start isEmpty. Operand 2261 states and 6970 transitions. [2021-03-10 21:15:10,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:15:10,364 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:10,364 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:10,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2021-03-10 21:15:10,567 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:10,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:10,567 INFO L82 PathProgramCache]: Analyzing trace with hash -221056449, now seen corresponding path program 173 times [2021-03-10 21:15:10,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:10,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140365217] [2021-03-10 21:15:10,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:10,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:10,708 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:10,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140365217] [2021-03-10 21:15:10,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622193930] [2021-03-10 21:15:10,708 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:10,733 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:15:10,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:10,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:15:10,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:10,856 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:10,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:10,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-03-10 21:15:10,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660051041] [2021-03-10 21:15:10,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:15:10,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:10,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:15:10,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:15:10,857 INFO L87 Difference]: Start difference. First operand 2261 states and 6970 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:11,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:11,137 INFO L93 Difference]: Finished difference Result 2516 states and 7381 transitions. [2021-03-10 21:15:11,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:15:11,138 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:15:11,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:11,141 INFO L225 Difference]: With dead ends: 2516 [2021-03-10 21:15:11,141 INFO L226 Difference]: Without dead ends: 2498 [2021-03-10 21:15:11,141 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 297.2ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:15:11,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2021-03-10 21:15:11,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 2230. [2021-03-10 21:15:11,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2230 states, 2229 states have (on average 3.0744728577837597) internal successors, (6853), 2229 states have internal predecessors, (6853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:11,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2230 states to 2230 states and 6853 transitions. [2021-03-10 21:15:11,165 INFO L78 Accepts]: Start accepts. Automaton has 2230 states and 6853 transitions. Word has length 21 [2021-03-10 21:15:11,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:11,166 INFO L480 AbstractCegarLoop]: Abstraction has 2230 states and 6853 transitions. [2021-03-10 21:15:11,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:11,166 INFO L276 IsEmpty]: Start isEmpty. Operand 2230 states and 6853 transitions. [2021-03-10 21:15:11,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:15:11,168 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:11,168 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:11,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:11,368 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:11,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:11,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1994617019, now seen corresponding path program 174 times [2021-03-10 21:15:11,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:11,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524659666] [2021-03-10 21:15:11,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:11,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:11,472 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:11,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524659666] [2021-03-10 21:15:11,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933364415] [2021-03-10 21:15:11,472 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:11,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:15:11,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:11,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:15:11,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:11,627 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:11,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:11,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-03-10 21:15:11,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047176041] [2021-03-10 21:15:11,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:15:11,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:11,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:15:11,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:15:11,628 INFO L87 Difference]: Start difference. First operand 2230 states and 6853 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:11,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:11,931 INFO L93 Difference]: Finished difference Result 2507 states and 7296 transitions. [2021-03-10 21:15:11,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:15:11,931 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:15:11,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:11,934 INFO L225 Difference]: With dead ends: 2507 [2021-03-10 21:15:11,934 INFO L226 Difference]: Without dead ends: 2485 [2021-03-10 21:15:11,936 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 253.1ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:15:11,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2485 states. [2021-03-10 21:15:11,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2485 to 2217. [2021-03-10 21:15:11,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2217 states, 2216 states have (on average 3.0699458483754514) internal successors, (6803), 2216 states have internal predecessors, (6803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:11,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2217 states to 2217 states and 6803 transitions. [2021-03-10 21:15:11,965 INFO L78 Accepts]: Start accepts. Automaton has 2217 states and 6803 transitions. Word has length 21 [2021-03-10 21:15:11,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:11,965 INFO L480 AbstractCegarLoop]: Abstraction has 2217 states and 6803 transitions. [2021-03-10 21:15:11,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:11,965 INFO L276 IsEmpty]: Start isEmpty. Operand 2217 states and 6803 transitions. [2021-03-10 21:15:11,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:15:11,968 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:11,968 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:12,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable309 [2021-03-10 21:15:12,168 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:12,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:12,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1961017791, now seen corresponding path program 175 times [2021-03-10 21:15:12,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:12,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936069310] [2021-03-10 21:15:12,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:12,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:12,286 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:12,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936069310] [2021-03-10 21:15:12,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142256792] [2021-03-10 21:15:12,286 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:12,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:12,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:15:12,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:12,412 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:12,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:12,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-03-10 21:15:12,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053979992] [2021-03-10 21:15:12,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:15:12,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:12,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:15:12,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:15:12,413 INFO L87 Difference]: Start difference. First operand 2217 states and 6803 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:12,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:12,746 INFO L93 Difference]: Finished difference Result 2454 states and 7183 transitions. [2021-03-10 21:15:12,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:15:12,746 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:15:12,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:12,749 INFO L225 Difference]: With dead ends: 2454 [2021-03-10 21:15:12,750 INFO L226 Difference]: Without dead ends: 2428 [2021-03-10 21:15:12,750 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 288.1ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:15:12,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2428 states. [2021-03-10 21:15:12,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2428 to 2206. [2021-03-10 21:15:12,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2206 states, 2205 states have (on average 3.068934240362812) internal successors, (6767), 2205 states have internal predecessors, (6767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:12,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2206 states to 2206 states and 6767 transitions. [2021-03-10 21:15:12,776 INFO L78 Accepts]: Start accepts. Automaton has 2206 states and 6767 transitions. Word has length 21 [2021-03-10 21:15:12,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:12,776 INFO L480 AbstractCegarLoop]: Abstraction has 2206 states and 6767 transitions. [2021-03-10 21:15:12,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:12,776 INFO L276 IsEmpty]: Start isEmpty. Operand 2206 states and 6767 transitions. [2021-03-10 21:15:12,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:15:12,778 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:12,778 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:12,979 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2021-03-10 21:15:12,979 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:12,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:12,979 INFO L82 PathProgramCache]: Analyzing trace with hash 919441723, now seen corresponding path program 176 times [2021-03-10 21:15:12,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:12,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698730742] [2021-03-10 21:15:12,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:12,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:13,101 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:13,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698730742] [2021-03-10 21:15:13,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468208924] [2021-03-10 21:15:13,101 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 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 [2021-03-10 21:15:13,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:15:13,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:13,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:15:13,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:13,251 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:13,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:13,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-03-10 21:15:13,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138762551] [2021-03-10 21:15:13,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:15:13,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:13,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:15:13,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:15:13,252 INFO L87 Difference]: Start difference. First operand 2206 states and 6767 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:13,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:13,624 INFO L93 Difference]: Finished difference Result 2375 states and 7031 transitions. [2021-03-10 21:15:13,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:15:13,624 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:15:13,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:13,627 INFO L225 Difference]: With dead ends: 2375 [2021-03-10 21:15:13,627 INFO L226 Difference]: Without dead ends: 2368 [2021-03-10 21:15:13,627 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 290.8ms TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:15:13,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2368 states. [2021-03-10 21:15:13,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2368 to 2208. [2021-03-10 21:15:13,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2208 states, 2207 states have (on average 3.067512460353421) internal successors, (6770), 2207 states have internal predecessors, (6770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:13,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2208 states to 2208 states and 6770 transitions. [2021-03-10 21:15:13,650 INFO L78 Accepts]: Start accepts. Automaton has 2208 states and 6770 transitions. Word has length 21 [2021-03-10 21:15:13,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:13,650 INFO L480 AbstractCegarLoop]: Abstraction has 2208 states and 6770 transitions. [2021-03-10 21:15:13,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:13,650 INFO L276 IsEmpty]: Start isEmpty. Operand 2208 states and 6770 transitions. [2021-03-10 21:15:13,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:15:13,652 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:13,652 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:13,853 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable315,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:13,853 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:13,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:13,853 INFO L82 PathProgramCache]: Analyzing trace with hash -420518503, now seen corresponding path program 177 times [2021-03-10 21:15:13,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:13,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693021583] [2021-03-10 21:15:13,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:13,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:13,970 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:13,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693021583] [2021-03-10 21:15:13,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813440948] [2021-03-10 21:15:13,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:13,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:15:13,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:13,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:15:13,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:14,142 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:14,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:14,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2021-03-10 21:15:14,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399731621] [2021-03-10 21:15:14,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:15:14,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:14,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:15:14,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:15:14,143 INFO L87 Difference]: Start difference. First operand 2208 states and 6770 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 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) [2021-03-10 21:15:14,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:14,332 INFO L93 Difference]: Finished difference Result 2298 states and 6916 transitions. [2021-03-10 21:15:14,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:15:14,333 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 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 21 [2021-03-10 21:15:14,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:14,336 INFO L225 Difference]: With dead ends: 2298 [2021-03-10 21:15:14,336 INFO L226 Difference]: Without dead ends: 2285 [2021-03-10 21:15:14,336 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 255.4ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:15:14,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-03-10 21:15:14,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 2196. [2021-03-10 21:15:14,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2196 states, 2195 states have (on average 3.0674259681093394) internal successors, (6733), 2195 states have internal predecessors, (6733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:14,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 6733 transitions. [2021-03-10 21:15:14,361 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 6733 transitions. Word has length 21 [2021-03-10 21:15:14,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:14,361 INFO L480 AbstractCegarLoop]: Abstraction has 2196 states and 6733 transitions. [2021-03-10 21:15:14,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 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) [2021-03-10 21:15:14,361 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 6733 transitions. [2021-03-10 21:15:14,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:15:14,363 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:14,363 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:14,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:14,565 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:14,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:14,565 INFO L82 PathProgramCache]: Analyzing trace with hash -666539009, now seen corresponding path program 178 times [2021-03-10 21:15:14,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:14,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946101298] [2021-03-10 21:15:14,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:14,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:14,684 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:14,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946101298] [2021-03-10 21:15:14,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615556682] [2021-03-10 21:15:14,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:15:14,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:15:14,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:14,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:15:14,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:14,823 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:14,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:14,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 21:15:14,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023562841] [2021-03-10 21:15:14,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:15:14,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:14,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:15:14,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:15:14,824 INFO L87 Difference]: Start difference. First operand 2196 states and 6733 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:15,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:15,102 INFO L93 Difference]: Finished difference Result 2566 states and 7558 transitions. [2021-03-10 21:15:15,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:15:15,102 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:15:15,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:15,105 INFO L225 Difference]: With dead ends: 2566 [2021-03-10 21:15:15,105 INFO L226 Difference]: Without dead ends: 2549 [2021-03-10 21:15:15,105 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 253.6ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:15:15,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2549 states. [2021-03-10 21:15:15,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2549 to 2334. [2021-03-10 21:15:15,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2334 states, 2333 states have (on average 3.072438919845692) internal successors, (7168), 2333 states have internal predecessors, (7168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:15,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2334 states to 2334 states and 7168 transitions. [2021-03-10 21:15:15,131 INFO L78 Accepts]: Start accepts. Automaton has 2334 states and 7168 transitions. Word has length 21 [2021-03-10 21:15:15,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:15,131 INFO L480 AbstractCegarLoop]: Abstraction has 2334 states and 7168 transitions. [2021-03-10 21:15:15,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:15,132 INFO L276 IsEmpty]: Start isEmpty. Operand 2334 states and 7168 transitions. [2021-03-10 21:15:15,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:15:15,134 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:15,134 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:15,335 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable321,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:15,335 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:15,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:15,335 INFO L82 PathProgramCache]: Analyzing trace with hash 948163715, now seen corresponding path program 179 times [2021-03-10 21:15:15,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:15,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884874491] [2021-03-10 21:15:15,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:15,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:15,445 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:15,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884874491] [2021-03-10 21:15:15,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213339420] [2021-03-10 21:15:15,445 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:15,464 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:15:15,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:15,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:15:15,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:15,570 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:15,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:15,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 21:15:15,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317524521] [2021-03-10 21:15:15,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:15:15,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:15,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:15:15,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:15:15,571 INFO L87 Difference]: Start difference. First operand 2334 states and 7168 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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) [2021-03-10 21:15:15,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:15,810 INFO L93 Difference]: Finished difference Result 2564 states and 7531 transitions. [2021-03-10 21:15:15,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:15:15,810 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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 21 [2021-03-10 21:15:15,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:15,813 INFO L225 Difference]: With dead ends: 2564 [2021-03-10 21:15:15,813 INFO L226 Difference]: Without dead ends: 2548 [2021-03-10 21:15:15,813 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 238.1ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:15:15,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2548 states. [2021-03-10 21:15:15,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2548 to 2315. [2021-03-10 21:15:15,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2315 states, 2314 states have (on average 3.066983578219533) internal successors, (7097), 2314 states have internal predecessors, (7097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:15,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2315 states to 2315 states and 7097 transitions. [2021-03-10 21:15:15,846 INFO L78 Accepts]: Start accepts. Automaton has 2315 states and 7097 transitions. Word has length 21 [2021-03-10 21:15:15,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:15,846 INFO L480 AbstractCegarLoop]: Abstraction has 2315 states and 7097 transitions. [2021-03-10 21:15:15,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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) [2021-03-10 21:15:15,846 INFO L276 IsEmpty]: Start isEmpty. Operand 2315 states and 7097 transitions. [2021-03-10 21:15:15,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:15:15,848 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:15,848 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:16,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2021-03-10 21:15:16,049 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:16,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:16,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1131130113, now seen corresponding path program 180 times [2021-03-10 21:15:16,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:16,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655549679] [2021-03-10 21:15:16,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:16,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:16,180 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:16,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655549679] [2021-03-10 21:15:16,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168719059] [2021-03-10 21:15:16,180 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:16,201 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:15:16,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:16,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:15:16,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:16,325 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:16,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:16,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 21:15:16,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011432920] [2021-03-10 21:15:16,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:15:16,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:16,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:15:16,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:15:16,326 INFO L87 Difference]: Start difference. First operand 2315 states and 7097 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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) [2021-03-10 21:15:16,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:16,640 INFO L93 Difference]: Finished difference Result 2571 states and 7503 transitions. [2021-03-10 21:15:16,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:15:16,641 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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 21 [2021-03-10 21:15:16,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:16,644 INFO L225 Difference]: With dead ends: 2571 [2021-03-10 21:15:16,644 INFO L226 Difference]: Without dead ends: 2553 [2021-03-10 21:15:16,645 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 270.3ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:15:16,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2021-03-10 21:15:16,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 2295. [2021-03-10 21:15:16,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2295 states, 2294 states have (on average 3.0610287707061903) internal successors, (7022), 2294 states have internal predecessors, (7022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:16,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2295 states to 2295 states and 7022 transitions. [2021-03-10 21:15:16,675 INFO L78 Accepts]: Start accepts. Automaton has 2295 states and 7022 transitions. Word has length 21 [2021-03-10 21:15:16,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:16,675 INFO L480 AbstractCegarLoop]: Abstraction has 2295 states and 7022 transitions. [2021-03-10 21:15:16,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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) [2021-03-10 21:15:16,675 INFO L276 IsEmpty]: Start isEmpty. Operand 2295 states and 7022 transitions. [2021-03-10 21:15:16,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:15:16,679 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:16,679 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:16,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2021-03-10 21:15:16,887 INFO L428 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:16,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:16,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1164729341, now seen corresponding path program 181 times [2021-03-10 21:15:16,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:16,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443948002] [2021-03-10 21:15:16,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:16,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:17,001 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:17,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443948002] [2021-03-10 21:15:17,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191008069] [2021-03-10 21:15:17,002 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:17,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:17,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:15:17,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:17,152 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:17,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:17,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 21:15:17,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249773454] [2021-03-10 21:15:17,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:15:17,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:17,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:15:17,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:15:17,152 INFO L87 Difference]: Start difference. First operand 2295 states and 7022 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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) [2021-03-10 21:15:17,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:17,462 INFO L93 Difference]: Finished difference Result 2576 states and 7464 transitions. [2021-03-10 21:15:17,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:15:17,462 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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 21 [2021-03-10 21:15:17,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:17,466 INFO L225 Difference]: With dead ends: 2576 [2021-03-10 21:15:17,466 INFO L226 Difference]: Without dead ends: 2556 [2021-03-10 21:15:17,466 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 276.3ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:15:17,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-03-10 21:15:17,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 2276. [2021-03-10 21:15:17,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2276 states, 2275 states have (on average 3.0567032967032968) internal successors, (6954), 2275 states have internal predecessors, (6954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:17,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 6954 transitions. [2021-03-10 21:15:17,492 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 6954 transitions. Word has length 21 [2021-03-10 21:15:17,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:17,492 INFO L480 AbstractCegarLoop]: Abstraction has 2276 states and 6954 transitions. [2021-03-10 21:15:17,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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) [2021-03-10 21:15:17,492 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 6954 transitions. [2021-03-10 21:15:17,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:15:17,494 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:17,494 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:17,695 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable330 [2021-03-10 21:15:17,695 INFO L428 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:17,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:17,695 INFO L82 PathProgramCache]: Analyzing trace with hash 2088661887, now seen corresponding path program 182 times [2021-03-10 21:15:17,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:17,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479176409] [2021-03-10 21:15:17,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:17,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:17,821 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:17,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479176409] [2021-03-10 21:15:17,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886090352] [2021-03-10 21:15:17,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:17,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:15:17,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:17,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:15:17,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:17,971 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:17,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:17,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 21:15:17,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553559378] [2021-03-10 21:15:17,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:15:17,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:17,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:15:17,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:15:17,971 INFO L87 Difference]: Start difference. First operand 2276 states and 6954 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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) [2021-03-10 21:15:18,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:18,362 INFO L93 Difference]: Finished difference Result 2488 states and 7287 transitions. [2021-03-10 21:15:18,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:15:18,362 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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 21 [2021-03-10 21:15:18,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:18,365 INFO L225 Difference]: With dead ends: 2488 [2021-03-10 21:15:18,365 INFO L226 Difference]: Without dead ends: 2466 [2021-03-10 21:15:18,365 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 314.9ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:15:18,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2466 states. [2021-03-10 21:15:18,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2466 to 2256. [2021-03-10 21:15:18,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 2255 states have (on average 3.0594235033259425) internal successors, (6899), 2255 states have internal predecessors, (6899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:18,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 6899 transitions. [2021-03-10 21:15:18,390 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 6899 transitions. Word has length 21 [2021-03-10 21:15:18,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:18,390 INFO L480 AbstractCegarLoop]: Abstraction has 2256 states and 6899 transitions. [2021-03-10 21:15:18,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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) [2021-03-10 21:15:18,391 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 6899 transitions. [2021-03-10 21:15:18,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:15:18,393 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:18,393 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:18,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-03-10 21:15:18,593 INFO L428 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:18,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:18,593 INFO L82 PathProgramCache]: Analyzing trace with hash -135425149, now seen corresponding path program 183 times [2021-03-10 21:15:18,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:18,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847015685] [2021-03-10 21:15:18,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:18,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:18,712 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:18,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847015685] [2021-03-10 21:15:18,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965269714] [2021-03-10 21:15:18,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:18,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:15:18,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:18,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:15:18,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:18,843 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:18,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:18,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 21:15:18,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618591559] [2021-03-10 21:15:18,843 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:15:18,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:18,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:15:18,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:15:18,844 INFO L87 Difference]: Start difference. First operand 2256 states and 6899 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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) [2021-03-10 21:15:19,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:19,179 INFO L93 Difference]: Finished difference Result 2408 states and 7132 transitions. [2021-03-10 21:15:19,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:15:19,179 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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 21 [2021-03-10 21:15:19,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:19,183 INFO L225 Difference]: With dead ends: 2408 [2021-03-10 21:15:19,183 INFO L226 Difference]: Without dead ends: 2401 [2021-03-10 21:15:19,183 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 274.6ms TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:15:19,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2401 states. [2021-03-10 21:15:19,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2401 to 2266. [2021-03-10 21:15:19,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2266 states, 2265 states have (on average 3.0525386313465783) internal successors, (6914), 2265 states have internal predecessors, (6914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:19,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2266 states to 2266 states and 6914 transitions. [2021-03-10 21:15:19,210 INFO L78 Accepts]: Start accepts. Automaton has 2266 states and 6914 transitions. Word has length 21 [2021-03-10 21:15:19,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:19,210 INFO L480 AbstractCegarLoop]: Abstraction has 2266 states and 6914 transitions. [2021-03-10 21:15:19,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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) [2021-03-10 21:15:19,211 INFO L276 IsEmpty]: Start isEmpty. Operand 2266 states and 6914 transitions. [2021-03-10 21:15:19,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:15:19,213 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:19,213 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:19,413 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:19,413 INFO L428 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:19,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:19,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1867189759, now seen corresponding path program 184 times [2021-03-10 21:15:19,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:19,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656185744] [2021-03-10 21:15:19,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:19,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:19,531 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:19,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656185744] [2021-03-10 21:15:19,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425561267] [2021-03-10 21:15:19,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:15:19,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:15:19,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:19,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:15:19,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:19,687 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:19,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:19,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2021-03-10 21:15:19,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145343407] [2021-03-10 21:15:19,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:15:19,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:19,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:15:19,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:15:19,688 INFO L87 Difference]: Start difference. First operand 2266 states and 6914 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:19,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:19,883 INFO L93 Difference]: Finished difference Result 2482 states and 7361 transitions. [2021-03-10 21:15:19,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:15:19,883 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:15:19,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:19,887 INFO L225 Difference]: With dead ends: 2482 [2021-03-10 21:15:19,887 INFO L226 Difference]: Without dead ends: 2472 [2021-03-10 21:15:19,887 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 251.6ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:15:19,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2021-03-10 21:15:19,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 2293. [2021-03-10 21:15:19,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2293 states, 2292 states have (on average 3.0584642233856894) internal successors, (7010), 2292 states have internal predecessors, (7010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:19,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2293 states to 2293 states and 7010 transitions. [2021-03-10 21:15:19,917 INFO L78 Accepts]: Start accepts. Automaton has 2293 states and 7010 transitions. Word has length 21 [2021-03-10 21:15:19,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:19,917 INFO L480 AbstractCegarLoop]: Abstraction has 2293 states and 7010 transitions. [2021-03-10 21:15:19,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:19,917 INFO L276 IsEmpty]: Start isEmpty. Operand 2293 states and 7010 transitions. [2021-03-10 21:15:19,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:15:19,920 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:19,920 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:20,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:20,120 INFO L428 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:20,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:20,120 INFO L82 PathProgramCache]: Analyzing trace with hash -813074813, now seen corresponding path program 185 times [2021-03-10 21:15:20,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:20,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981346343] [2021-03-10 21:15:20,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:20,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:20,244 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:20,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981346343] [2021-03-10 21:15:20,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911588594] [2021-03-10 21:15:20,244 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:20,263 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:15:20,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:20,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:15:20,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:20,414 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:20,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:20,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2021-03-10 21:15:20,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778441732] [2021-03-10 21:15:20,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:15:20,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:20,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:15:20,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:15:20,415 INFO L87 Difference]: Start difference. First operand 2293 states and 7010 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 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) [2021-03-10 21:15:20,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:20,624 INFO L93 Difference]: Finished difference Result 2464 states and 7323 transitions. [2021-03-10 21:15:20,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:15:20,624 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 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 21 [2021-03-10 21:15:20,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:20,628 INFO L225 Difference]: With dead ends: 2464 [2021-03-10 21:15:20,628 INFO L226 Difference]: Without dead ends: 2457 [2021-03-10 21:15:20,628 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 252.9ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:15:20,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2021-03-10 21:15:20,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 2291. [2021-03-10 21:15:20,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 3.05764192139738) internal successors, (7002), 2290 states have internal predecessors, (7002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:20,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 7002 transitions. [2021-03-10 21:15:20,664 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 7002 transitions. Word has length 21 [2021-03-10 21:15:20,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:20,664 INFO L480 AbstractCegarLoop]: Abstraction has 2291 states and 7002 transitions. [2021-03-10 21:15:20,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 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) [2021-03-10 21:15:20,664 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 7002 transitions. [2021-03-10 21:15:20,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:15:20,666 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:20,666 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:20,866 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable342,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:20,867 INFO L428 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:20,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:20,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1856322731, now seen corresponding path program 186 times [2021-03-10 21:15:20,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:20,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635990923] [2021-03-10 21:15:20,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:20,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:20,976 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:20,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635990923] [2021-03-10 21:15:20,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722287658] [2021-03-10 21:15:20,977 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:15:20,996 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:15:20,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:20,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:15:20,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:21,131 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:21,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:21,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2021-03-10 21:15:21,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705819505] [2021-03-10 21:15:21,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:15:21,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:21,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:15:21,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:15:21,132 INFO L87 Difference]: Start difference. First operand 2291 states and 7002 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:21,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:21,301 INFO L93 Difference]: Finished difference Result 2417 states and 7217 transitions. [2021-03-10 21:15:21,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:15:21,302 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:15:21,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:21,305 INFO L225 Difference]: With dead ends: 2417 [2021-03-10 21:15:21,305 INFO L226 Difference]: Without dead ends: 2410 [2021-03-10 21:15:21,305 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 236.7ms TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:15:21,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2410 states. [2021-03-10 21:15:21,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2410 to 2290. [2021-03-10 21:15:21,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2290 states, 2289 states have (on average 3.0576671035386633) internal successors, (6999), 2289 states have internal predecessors, (6999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:21,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2290 states to 2290 states and 6999 transitions. [2021-03-10 21:15:21,331 INFO L78 Accepts]: Start accepts. Automaton has 2290 states and 6999 transitions. Word has length 21 [2021-03-10 21:15:21,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:21,332 INFO L480 AbstractCegarLoop]: Abstraction has 2290 states and 6999 transitions. [2021-03-10 21:15:21,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:21,332 INFO L276 IsEmpty]: Start isEmpty. Operand 2290 states and 6999 transitions. [2021-03-10 21:15:21,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:15:21,334 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:21,334 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:21,534 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-03-10 21:15:21,534 INFO L428 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:21,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:21,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1191597057, now seen corresponding path program 187 times [2021-03-10 21:15:21,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:21,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173816206] [2021-03-10 21:15:21,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:21,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:21,642 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:21,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173816206] [2021-03-10 21:15:21,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942490720] [2021-03-10 21:15:21,643 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:21,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:21,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:15:21,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:21,792 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:21,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:21,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-03-10 21:15:21,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126161094] [2021-03-10 21:15:21,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:15:21,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:21,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:15:21,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:15:21,793 INFO L87 Difference]: Start difference. First operand 2290 states and 6999 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 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) [2021-03-10 21:15:22,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:22,008 INFO L93 Difference]: Finished difference Result 2563 states and 7583 transitions. [2021-03-10 21:15:22,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:15:22,009 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 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 21 [2021-03-10 21:15:22,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:22,012 INFO L225 Difference]: With dead ends: 2563 [2021-03-10 21:15:22,012 INFO L226 Difference]: Without dead ends: 2553 [2021-03-10 21:15:22,012 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 246.7ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:15:22,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2021-03-10 21:15:22,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 2331. [2021-03-10 21:15:22,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 3.06480686695279) internal successors, (7141), 2330 states have internal predecessors, (7141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:22,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 7141 transitions. [2021-03-10 21:15:22,038 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 7141 transitions. Word has length 21 [2021-03-10 21:15:22,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:22,038 INFO L480 AbstractCegarLoop]: Abstraction has 2331 states and 7141 transitions. [2021-03-10 21:15:22,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 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) [2021-03-10 21:15:22,038 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 7141 transitions. [2021-03-10 21:15:22,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:15:22,040 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:22,040 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:22,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2021-03-10 21:15:22,241 INFO L428 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:22,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:22,241 INFO L82 PathProgramCache]: Analyzing trace with hash 423105667, now seen corresponding path program 188 times [2021-03-10 21:15:22,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:22,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89478300] [2021-03-10 21:15:22,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:22,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:22,355 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:22,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89478300] [2021-03-10 21:15:22,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182206358] [2021-03-10 21:15:22,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:22,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:15:22,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:22,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:15:22,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:22,498 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:22,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:22,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-03-10 21:15:22,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096949720] [2021-03-10 21:15:22,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:15:22,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:22,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:15:22,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:15:22,498 INFO L87 Difference]: Start difference. First operand 2331 states and 7141 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:22,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:22,720 INFO L93 Difference]: Finished difference Result 2544 states and 7541 transitions. [2021-03-10 21:15:22,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:15:22,720 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:15:22,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:22,724 INFO L225 Difference]: With dead ends: 2544 [2021-03-10 21:15:22,724 INFO L226 Difference]: Without dead ends: 2537 [2021-03-10 21:15:22,724 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 237.2ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:15:22,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2537 states. [2021-03-10 21:15:22,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2537 to 2328. [2021-03-10 21:15:22,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2328 states, 2327 states have (on average 3.063601203266008) internal successors, (7129), 2327 states have internal predecessors, (7129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:22,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2328 states to 2328 states and 7129 transitions. [2021-03-10 21:15:22,755 INFO L78 Accepts]: Start accepts. Automaton has 2328 states and 7129 transitions. Word has length 21 [2021-03-10 21:15:22,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:22,755 INFO L480 AbstractCegarLoop]: Abstraction has 2328 states and 7129 transitions. [2021-03-10 21:15:22,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:22,755 INFO L276 IsEmpty]: Start isEmpty. Operand 2328 states and 7129 transitions. [2021-03-10 21:15:22,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:15:22,758 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:22,758 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:22,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:22,974 INFO L428 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:22,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:22,974 INFO L82 PathProgramCache]: Analyzing trace with hash -620142251, now seen corresponding path program 189 times [2021-03-10 21:15:22,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:22,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033013143] [2021-03-10 21:15:22,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:22,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:23,087 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:23,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033013143] [2021-03-10 21:15:23,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330188704] [2021-03-10 21:15:23,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:23,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:15:23,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:23,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:15:23,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:23,246 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:23,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:23,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-03-10 21:15:23,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279073078] [2021-03-10 21:15:23,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:15:23,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:23,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:15:23,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:15:23,247 INFO L87 Difference]: Start difference. First operand 2328 states and 7129 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 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) [2021-03-10 21:15:23,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:23,475 INFO L93 Difference]: Finished difference Result 2523 states and 7485 transitions. [2021-03-10 21:15:23,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:15:23,475 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 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 21 [2021-03-10 21:15:23,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:23,479 INFO L225 Difference]: With dead ends: 2523 [2021-03-10 21:15:23,479 INFO L226 Difference]: Without dead ends: 2510 [2021-03-10 21:15:23,479 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 258.9ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:15:23,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2510 states. [2021-03-10 21:15:23,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2510 to 2329. [2021-03-10 21:15:23,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2329 states, 2328 states have (on average 3.0614261168384878) internal successors, (7127), 2328 states have internal predecessors, (7127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:23,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2329 states to 2329 states and 7127 transitions. [2021-03-10 21:15:23,506 INFO L78 Accepts]: Start accepts. Automaton has 2329 states and 7127 transitions. Word has length 21 [2021-03-10 21:15:23,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:23,506 INFO L480 AbstractCegarLoop]: Abstraction has 2329 states and 7127 transitions. [2021-03-10 21:15:23,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 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) [2021-03-10 21:15:23,506 INFO L276 IsEmpty]: Start isEmpty. Operand 2329 states and 7127 transitions. [2021-03-10 21:15:23,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:15:23,508 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:23,509 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:23,709 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2021-03-10 21:15:23,709 INFO L428 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:23,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:23,709 INFO L82 PathProgramCache]: Analyzing trace with hash -84912449, now seen corresponding path program 190 times [2021-03-10 21:15:23,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:23,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576005751] [2021-03-10 21:15:23,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:23,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:23,818 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:23,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576005751] [2021-03-10 21:15:23,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406124110] [2021-03-10 21:15:23,818 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:23,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:15:23,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:23,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:15:23,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:23,958 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:23,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:23,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-03-10 21:15:23,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350917693] [2021-03-10 21:15:23,959 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:15:23,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:23,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:15:23,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:15:23,959 INFO L87 Difference]: Start difference. First operand 2329 states and 7127 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 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) [2021-03-10 21:15:24,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:24,207 INFO L93 Difference]: Finished difference Result 2467 states and 7353 transitions. [2021-03-10 21:15:24,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:15:24,208 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 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 21 [2021-03-10 21:15:24,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:24,211 INFO L225 Difference]: With dead ends: 2467 [2021-03-10 21:15:24,211 INFO L226 Difference]: Without dead ends: 2460 [2021-03-10 21:15:24,211 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 244.0ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:15:24,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2460 states. [2021-03-10 21:15:24,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2460 to 2327. [2021-03-10 21:15:24,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2327 states, 2326 states have (on average 3.0614789337919173) internal successors, (7121), 2326 states have internal predecessors, (7121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:24,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2327 states to 2327 states and 7121 transitions. [2021-03-10 21:15:24,249 INFO L78 Accepts]: Start accepts. Automaton has 2327 states and 7121 transitions. Word has length 21 [2021-03-10 21:15:24,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:24,250 INFO L480 AbstractCegarLoop]: Abstraction has 2327 states and 7121 transitions. [2021-03-10 21:15:24,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 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) [2021-03-10 21:15:24,250 INFO L276 IsEmpty]: Start isEmpty. Operand 2327 states and 7121 transitions. [2021-03-10 21:15:24,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:15:24,252 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:24,252 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:24,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:24,453 INFO L428 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:24,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:24,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1303821513, now seen corresponding path program 191 times [2021-03-10 21:15:24,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:24,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634112565] [2021-03-10 21:15:24,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:24,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:24,564 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:24,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634112565] [2021-03-10 21:15:24,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492209510] [2021-03-10 21:15:24,565 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:24,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:15:24,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:24,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:15:24,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:24,703 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:24,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:24,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-03-10 21:15:24,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024012228] [2021-03-10 21:15:24,703 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:15:24,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:24,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:15:24,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:15:24,704 INFO L87 Difference]: Start difference. First operand 2327 states and 7121 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 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) [2021-03-10 21:15:24,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:24,923 INFO L93 Difference]: Finished difference Result 2438 states and 7310 transitions. [2021-03-10 21:15:24,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:15:24,924 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 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 21 [2021-03-10 21:15:24,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:24,927 INFO L225 Difference]: With dead ends: 2438 [2021-03-10 21:15:24,927 INFO L226 Difference]: Without dead ends: 2422 [2021-03-10 21:15:24,927 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 239.4ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:15:24,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2422 states. [2021-03-10 21:15:24,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2422 to 2317. [2021-03-10 21:15:24,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 2316 states have (on average 3.0617443868739205) internal successors, (7091), 2316 states have internal predecessors, (7091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:24,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 7091 transitions. [2021-03-10 21:15:24,953 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 7091 transitions. Word has length 21 [2021-03-10 21:15:24,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:24,953 INFO L480 AbstractCegarLoop]: Abstraction has 2317 states and 7091 transitions. [2021-03-10 21:15:24,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 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) [2021-03-10 21:15:24,954 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 7091 transitions. [2021-03-10 21:15:24,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:15:24,956 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:24,956 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:25,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:25,167 INFO L428 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:25,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:25,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1524707841, now seen corresponding path program 192 times [2021-03-10 21:15:25,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:25,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774998943] [2021-03-10 21:15:25,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:25,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:25,288 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:25,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774998943] [2021-03-10 21:15:25,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883182478] [2021-03-10 21:15:25,288 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:25,307 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:15:25,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:25,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:15:25,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:25,416 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:25,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:25,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-03-10 21:15:25,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299224081] [2021-03-10 21:15:25,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:15:25,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:25,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:15:25,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:15:25,417 INFO L87 Difference]: Start difference. First operand 2317 states and 7091 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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) [2021-03-10 21:15:25,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:25,636 INFO L93 Difference]: Finished difference Result 2637 states and 7762 transitions. [2021-03-10 21:15:25,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:15:25,636 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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 21 [2021-03-10 21:15:25,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:25,640 INFO L225 Difference]: With dead ends: 2637 [2021-03-10 21:15:25,640 INFO L226 Difference]: Without dead ends: 2627 [2021-03-10 21:15:25,640 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 231.2ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:15:25,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2627 states. [2021-03-10 21:15:25,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2627 to 2365. [2021-03-10 21:15:25,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2365 states, 2364 states have (on average 3.0697969543147208) internal successors, (7257), 2364 states have internal predecessors, (7257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:25,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2365 states to 2365 states and 7257 transitions. [2021-03-10 21:15:25,672 INFO L78 Accepts]: Start accepts. Automaton has 2365 states and 7257 transitions. Word has length 21 [2021-03-10 21:15:25,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:25,672 INFO L480 AbstractCegarLoop]: Abstraction has 2365 states and 7257 transitions. [2021-03-10 21:15:25,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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) [2021-03-10 21:15:25,672 INFO L276 IsEmpty]: Start isEmpty. Operand 2365 states and 7257 transitions. [2021-03-10 21:15:25,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:15:25,674 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:25,675 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:25,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:25,875 INFO L428 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:25,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:25,875 INFO L82 PathProgramCache]: Analyzing trace with hash 89994883, now seen corresponding path program 193 times [2021-03-10 21:15:25,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:25,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664520053] [2021-03-10 21:15:25,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:25,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:25,988 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:25,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664520053] [2021-03-10 21:15:25,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88911414] [2021-03-10 21:15:25,989 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:26,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:26,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:15:26,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:26,114 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:26,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:26,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-03-10 21:15:26,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870186236] [2021-03-10 21:15:26,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:15:26,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:26,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:15:26,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:15:26,115 INFO L87 Difference]: Start difference. First operand 2365 states and 7257 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 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) [2021-03-10 21:15:26,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:26,338 INFO L93 Difference]: Finished difference Result 2621 states and 7728 transitions. [2021-03-10 21:15:26,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:15:26,338 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 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 21 [2021-03-10 21:15:26,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:26,342 INFO L225 Difference]: With dead ends: 2621 [2021-03-10 21:15:26,342 INFO L226 Difference]: Without dead ends: 2614 [2021-03-10 21:15:26,342 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 223.9ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:15:26,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2614 states. [2021-03-10 21:15:26,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2614 to 2358. [2021-03-10 21:15:26,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2358 states, 2357 states have (on average 3.068731438268986) internal successors, (7233), 2357 states have internal predecessors, (7233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:26,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2358 states to 2358 states and 7233 transitions. [2021-03-10 21:15:26,372 INFO L78 Accepts]: Start accepts. Automaton has 2358 states and 7233 transitions. Word has length 21 [2021-03-10 21:15:26,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:26,372 INFO L480 AbstractCegarLoop]: Abstraction has 2358 states and 7233 transitions. [2021-03-10 21:15:26,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 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) [2021-03-10 21:15:26,372 INFO L276 IsEmpty]: Start isEmpty. Operand 2358 states and 7233 transitions. [2021-03-10 21:15:26,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:15:26,375 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:26,375 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:26,575 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-03-10 21:15:26,575 INFO L428 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:26,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:26,575 INFO L82 PathProgramCache]: Analyzing trace with hash -953253035, now seen corresponding path program 194 times [2021-03-10 21:15:26,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:26,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620474424] [2021-03-10 21:15:26,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:26,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:26,679 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:26,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620474424] [2021-03-10 21:15:26,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951932991] [2021-03-10 21:15:26,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:26,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:15:26,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:26,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:15:26,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:26,845 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:26,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:26,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-03-10 21:15:26,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612723455] [2021-03-10 21:15:26,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:15:26,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:26,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:15:26,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:15:26,846 INFO L87 Difference]: Start difference. First operand 2358 states and 7233 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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) [2021-03-10 21:15:27,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:27,076 INFO L93 Difference]: Finished difference Result 2635 states and 7737 transitions. [2021-03-10 21:15:27,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:15:27,077 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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 21 [2021-03-10 21:15:27,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:27,080 INFO L225 Difference]: With dead ends: 2635 [2021-03-10 21:15:27,080 INFO L226 Difference]: Without dead ends: 2622 [2021-03-10 21:15:27,080 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 260.1ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:15:27,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2622 states. [2021-03-10 21:15:27,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2622 to 2355. [2021-03-10 21:15:27,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2355 states, 2354 states have (on average 3.0671197960917587) internal successors, (7220), 2354 states have internal predecessors, (7220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:27,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2355 states to 2355 states and 7220 transitions. [2021-03-10 21:15:27,108 INFO L78 Accepts]: Start accepts. Automaton has 2355 states and 7220 transitions. Word has length 21 [2021-03-10 21:15:27,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:27,108 INFO L480 AbstractCegarLoop]: Abstraction has 2355 states and 7220 transitions. [2021-03-10 21:15:27,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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) [2021-03-10 21:15:27,108 INFO L276 IsEmpty]: Start isEmpty. Operand 2355 states and 7220 transitions. [2021-03-10 21:15:27,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:15:27,110 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:27,110 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:27,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable369 [2021-03-10 21:15:27,311 INFO L428 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:27,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:27,311 INFO L82 PathProgramCache]: Analyzing trace with hash -418023233, now seen corresponding path program 195 times [2021-03-10 21:15:27,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:27,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377083600] [2021-03-10 21:15:27,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:27,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:27,418 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:27,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377083600] [2021-03-10 21:15:27,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783574773] [2021-03-10 21:15:27,419 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 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 [2021-03-10 21:15:27,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:15:27,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:27,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:15:27,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:27,549 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:27,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:27,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-03-10 21:15:27,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975318738] [2021-03-10 21:15:27,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:15:27,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:27,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:15:27,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:15:27,549 INFO L87 Difference]: Start difference. First operand 2355 states and 7220 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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) [2021-03-10 21:15:27,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:27,807 INFO L93 Difference]: Finished difference Result 2598 states and 7655 transitions. [2021-03-10 21:15:27,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:15:27,807 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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 21 [2021-03-10 21:15:27,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:27,811 INFO L225 Difference]: With dead ends: 2598 [2021-03-10 21:15:27,811 INFO L226 Difference]: Without dead ends: 2582 [2021-03-10 21:15:27,811 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 247.9ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:15:27,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2582 states. [2021-03-10 21:15:27,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2582 to 2352. [2021-03-10 21:15:27,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2352 states, 2351 states have (on average 3.0659293917481922) internal successors, (7208), 2351 states have internal predecessors, (7208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:27,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 7208 transitions. [2021-03-10 21:15:27,849 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 7208 transitions. Word has length 21 [2021-03-10 21:15:27,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:27,849 INFO L480 AbstractCegarLoop]: Abstraction has 2352 states and 7208 transitions. [2021-03-10 21:15:27,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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) [2021-03-10 21:15:27,849 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 7208 transitions. [2021-03-10 21:15:27,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:15:27,851 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:27,851 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:28,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:28,052 INFO L428 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:28,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:28,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1005768555, now seen corresponding path program 196 times [2021-03-10 21:15:28,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:28,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656232666] [2021-03-10 21:15:28,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:28,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:28,167 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:28,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656232666] [2021-03-10 21:15:28,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050832571] [2021-03-10 21:15:28,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:28,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:15:28,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:28,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:15:28,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:28,296 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:28,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:28,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-03-10 21:15:28,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382581998] [2021-03-10 21:15:28,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:15:28,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:28,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:15:28,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:15:28,297 INFO L87 Difference]: Start difference. First operand 2352 states and 7208 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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) [2021-03-10 21:15:28,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:28,599 INFO L93 Difference]: Finished difference Result 2537 states and 7524 transitions. [2021-03-10 21:15:28,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:15:28,599 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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 21 [2021-03-10 21:15:28,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:28,602 INFO L225 Difference]: With dead ends: 2537 [2021-03-10 21:15:28,602 INFO L226 Difference]: Without dead ends: 2530 [2021-03-10 21:15:28,603 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 256.4ms TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:15:28,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2530 states. [2021-03-10 21:15:28,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2530 to 2349. [2021-03-10 21:15:28,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2349 states, 2348 states have (on average 3.066013628620102) internal successors, (7199), 2348 states have internal predecessors, (7199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:28,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 7199 transitions. [2021-03-10 21:15:28,629 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 7199 transitions. Word has length 21 [2021-03-10 21:15:28,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:28,630 INFO L480 AbstractCegarLoop]: Abstraction has 2349 states and 7199 transitions. [2021-03-10 21:15:28,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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) [2021-03-10 21:15:28,630 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 7199 transitions. [2021-03-10 21:15:28,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:15:28,632 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:28,632 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:28,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-03-10 21:15:28,833 INFO L428 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:28,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:28,833 INFO L82 PathProgramCache]: Analyzing trace with hash 622856203, now seen corresponding path program 197 times [2021-03-10 21:15:28,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:28,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442317842] [2021-03-10 21:15:28,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:28,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:28,887 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:28,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442317842] [2021-03-10 21:15:28,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735484688] [2021-03-10 21:15:28,887 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:28,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:15:28,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:28,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:15:28,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:28,998 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:28,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:28,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-03-10 21:15:28,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322013081] [2021-03-10 21:15:28,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:15:28,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:28,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:15:28,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:15:28,999 INFO L87 Difference]: Start difference. First operand 2349 states and 7199 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) [2021-03-10 21:15:29,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:29,141 INFO L93 Difference]: Finished difference Result 3357 states and 10057 transitions. [2021-03-10 21:15:29,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:15:29,142 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 22 [2021-03-10 21:15:29,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:29,146 INFO L225 Difference]: With dead ends: 3357 [2021-03-10 21:15:29,146 INFO L226 Difference]: Without dead ends: 3337 [2021-03-10 21:15:29,146 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 185.8ms TimeCoverageRelationStatistics Valid=225, Invalid=645, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:15:29,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3337 states. [2021-03-10 21:15:29,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3337 to 2344. [2021-03-10 21:15:29,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2344 states, 2343 states have (on average 3.0682885189927442) internal successors, (7189), 2343 states have internal predecessors, (7189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:29,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 7189 transitions. [2021-03-10 21:15:29,182 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 7189 transitions. Word has length 22 [2021-03-10 21:15:29,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:29,183 INFO L480 AbstractCegarLoop]: Abstraction has 2344 states and 7189 transitions. [2021-03-10 21:15:29,183 INFO L481 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) [2021-03-10 21:15:29,183 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 7189 transitions. [2021-03-10 21:15:29,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:15:29,185 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:29,185 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:29,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-03-10 21:15:29,386 INFO L428 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:29,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:29,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1555322853, now seen corresponding path program 198 times [2021-03-10 21:15:29,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:29,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324226877] [2021-03-10 21:15:29,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:29,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:29,441 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:29,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324226877] [2021-03-10 21:15:29,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790160601] [2021-03-10 21:15:29,442 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:29,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:15:29,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:29,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:15:29,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:29,549 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:29,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:29,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-03-10 21:15:29,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138023949] [2021-03-10 21:15:29,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:15:29,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:29,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:15:29,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:15:29,549 INFO L87 Difference]: Start difference. First operand 2344 states and 7189 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) [2021-03-10 21:15:29,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:29,689 INFO L93 Difference]: Finished difference Result 3420 states and 10250 transitions. [2021-03-10 21:15:29,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:15:29,690 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 22 [2021-03-10 21:15:29,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:29,694 INFO L225 Difference]: With dead ends: 3420 [2021-03-10 21:15:29,694 INFO L226 Difference]: Without dead ends: 3420 [2021-03-10 21:15:29,694 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 127.9ms TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:15:29,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3420 states. [2021-03-10 21:15:29,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3420 to 2388. [2021-03-10 21:15:29,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2388 states, 2387 states have (on average 3.0670297444490995) internal successors, (7321), 2387 states have internal predecessors, (7321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:29,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2388 states to 2388 states and 7321 transitions. [2021-03-10 21:15:29,728 INFO L78 Accepts]: Start accepts. Automaton has 2388 states and 7321 transitions. Word has length 22 [2021-03-10 21:15:29,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:29,728 INFO L480 AbstractCegarLoop]: Abstraction has 2388 states and 7321 transitions. [2021-03-10 21:15:29,728 INFO L481 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) [2021-03-10 21:15:29,728 INFO L276 IsEmpty]: Start isEmpty. Operand 2388 states and 7321 transitions. [2021-03-10 21:15:29,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:15:29,730 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:29,730 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:29,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable379 [2021-03-10 21:15:29,931 INFO L428 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:29,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:29,931 INFO L82 PathProgramCache]: Analyzing trace with hash -167346353, now seen corresponding path program 199 times [2021-03-10 21:15:29,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:29,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964648132] [2021-03-10 21:15:29,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:29,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:29,984 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:29,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964648132] [2021-03-10 21:15:29,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576093469] [2021-03-10 21:15:29,984 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:30,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:30,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:15:30,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:30,106 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:30,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:30,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-03-10 21:15:30,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392140279] [2021-03-10 21:15:30,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:15:30,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:30,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:15:30,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:15:30,107 INFO L87 Difference]: Start difference. First operand 2388 states and 7321 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) [2021-03-10 21:15:30,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:30,665 INFO L93 Difference]: Finished difference Result 4110 states and 12006 transitions. [2021-03-10 21:15:30,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-03-10 21:15:30,666 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 22 [2021-03-10 21:15:30,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:30,671 INFO L225 Difference]: With dead ends: 4110 [2021-03-10 21:15:30,671 INFO L226 Difference]: Without dead ends: 4102 [2021-03-10 21:15:30,671 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 472.3ms TimeCoverageRelationStatistics Valid=837, Invalid=1713, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 21:15:30,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4102 states. [2021-03-10 21:15:30,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4102 to 2823. [2021-03-10 21:15:30,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2823 states, 2822 states have (on average 3.1119773210489017) internal successors, (8782), 2822 states have internal predecessors, (8782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:30,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2823 states to 2823 states and 8782 transitions. [2021-03-10 21:15:30,713 INFO L78 Accepts]: Start accepts. Automaton has 2823 states and 8782 transitions. Word has length 22 [2021-03-10 21:15:30,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:30,713 INFO L480 AbstractCegarLoop]: Abstraction has 2823 states and 8782 transitions. [2021-03-10 21:15:30,713 INFO L481 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) [2021-03-10 21:15:30,713 INFO L276 IsEmpty]: Start isEmpty. Operand 2823 states and 8782 transitions. [2021-03-10 21:15:30,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:15:30,716 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:30,717 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:30,917 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:30,917 INFO L428 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:30,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:30,917 INFO L82 PathProgramCache]: Analyzing trace with hash 404108453, now seen corresponding path program 200 times [2021-03-10 21:15:30,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:30,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395632225] [2021-03-10 21:15:30,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:30,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:30,991 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:30,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395632225] [2021-03-10 21:15:30,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653151704] [2021-03-10 21:15:30,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:31,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:15:31,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:31,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:15:31,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:31,122 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:31,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:31,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-03-10 21:15:31,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085240585] [2021-03-10 21:15:31,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:15:31,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:31,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:15:31,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:15:31,122 INFO L87 Difference]: Start difference. First operand 2823 states and 8782 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) [2021-03-10 21:15:31,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:31,701 INFO L93 Difference]: Finished difference Result 4077 states and 11861 transitions. [2021-03-10 21:15:31,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-03-10 21:15:31,702 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 22 [2021-03-10 21:15:31,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:31,707 INFO L225 Difference]: With dead ends: 4077 [2021-03-10 21:15:31,707 INFO L226 Difference]: Without dead ends: 4071 [2021-03-10 21:15:31,707 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 516.8ms TimeCoverageRelationStatistics Valid=851, Invalid=2571, Unknown=0, NotChecked=0, Total=3422 [2021-03-10 21:15:31,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4071 states. [2021-03-10 21:15:31,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4071 to 2645. [2021-03-10 21:15:31,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2645 states, 2644 states have (on average 3.0726172465960664) internal successors, (8124), 2644 states have internal predecessors, (8124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:31,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2645 states to 2645 states and 8124 transitions. [2021-03-10 21:15:31,748 INFO L78 Accepts]: Start accepts. Automaton has 2645 states and 8124 transitions. Word has length 22 [2021-03-10 21:15:31,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:31,748 INFO L480 AbstractCegarLoop]: Abstraction has 2645 states and 8124 transitions. [2021-03-10 21:15:31,748 INFO L481 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) [2021-03-10 21:15:31,748 INFO L276 IsEmpty]: Start isEmpty. Operand 2645 states and 8124 transitions. [2021-03-10 21:15:31,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:15:31,751 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:31,751 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:31,951 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:31,951 INFO L428 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:31,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:31,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1527463093, now seen corresponding path program 201 times [2021-03-10 21:15:31,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:31,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914015069] [2021-03-10 21:15:31,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:31,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:32,007 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:32,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914015069] [2021-03-10 21:15:32,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901071344] [2021-03-10 21:15:32,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:15:32,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:15:32,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:32,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:15:32,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:32,121 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:32,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:32,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-03-10 21:15:32,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303024053] [2021-03-10 21:15:32,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:15:32,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:32,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:15:32,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:15:32,122 INFO L87 Difference]: Start difference. First operand 2645 states and 8124 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:32,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:32,800 INFO L93 Difference]: Finished difference Result 3589 states and 10404 transitions. [2021-03-10 21:15:32,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-10 21:15:32,801 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:15:32,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:32,805 INFO L225 Difference]: With dead ends: 3589 [2021-03-10 21:15:32,805 INFO L226 Difference]: Without dead ends: 3589 [2021-03-10 21:15:32,805 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 537.9ms TimeCoverageRelationStatistics Valid=1188, Invalid=2118, Unknown=0, NotChecked=0, Total=3306 [2021-03-10 21:15:32,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3589 states. [2021-03-10 21:15:32,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3589 to 2809. [2021-03-10 21:15:32,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2809 states, 2808 states have (on average 3.094017094017094) internal successors, (8688), 2808 states have internal predecessors, (8688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:32,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2809 states to 2809 states and 8688 transitions. [2021-03-10 21:15:32,842 INFO L78 Accepts]: Start accepts. Automaton has 2809 states and 8688 transitions. Word has length 22 [2021-03-10 21:15:32,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:32,842 INFO L480 AbstractCegarLoop]: Abstraction has 2809 states and 8688 transitions. [2021-03-10 21:15:32,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:32,842 INFO L276 IsEmpty]: Start isEmpty. Operand 2809 states and 8688 transitions. [2021-03-10 21:15:32,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:15:32,844 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:32,844 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:33,045 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:33,045 INFO L428 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:33,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:33,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1992054197, now seen corresponding path program 202 times [2021-03-10 21:15:33,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:33,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524892964] [2021-03-10 21:15:33,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:33,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:33,097 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:33,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524892964] [2021-03-10 21:15:33,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438569273] [2021-03-10 21:15:33,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:33,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:15:33,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:33,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:15:33,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:33,210 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:33,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:33,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-03-10 21:15:33,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837537298] [2021-03-10 21:15:33,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:15:33,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:33,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:15:33,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:15:33,211 INFO L87 Difference]: Start difference. First operand 2809 states and 8688 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) [2021-03-10 21:15:33,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:33,857 INFO L93 Difference]: Finished difference Result 3314 states and 9794 transitions. [2021-03-10 21:15:33,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-03-10 21:15:33,857 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 22 [2021-03-10 21:15:33,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:33,861 INFO L225 Difference]: With dead ends: 3314 [2021-03-10 21:15:33,861 INFO L226 Difference]: Without dead ends: 3310 [2021-03-10 21:15:33,862 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 553.0ms TimeCoverageRelationStatistics Valid=1484, Invalid=2806, Unknown=0, NotChecked=0, Total=4290 [2021-03-10 21:15:33,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3310 states. [2021-03-10 21:15:33,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3310 to 2519. [2021-03-10 21:15:33,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2519 states, 2518 states have (on average 3.0532168387609215) internal successors, (7688), 2518 states have internal predecessors, (7688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:33,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2519 states to 2519 states and 7688 transitions. [2021-03-10 21:15:33,896 INFO L78 Accepts]: Start accepts. Automaton has 2519 states and 7688 transitions. Word has length 22 [2021-03-10 21:15:33,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:33,896 INFO L480 AbstractCegarLoop]: Abstraction has 2519 states and 7688 transitions. [2021-03-10 21:15:33,896 INFO L481 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) [2021-03-10 21:15:33,896 INFO L276 IsEmpty]: Start isEmpty. Operand 2519 states and 7688 transitions. [2021-03-10 21:15:33,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:15:33,899 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:33,899 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:34,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:34,100 INFO L428 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:34,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:34,100 INFO L82 PathProgramCache]: Analyzing trace with hash 939338255, now seen corresponding path program 203 times [2021-03-10 21:15:34,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:34,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097861378] [2021-03-10 21:15:34,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:34,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:34,158 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:34,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097861378] [2021-03-10 21:15:34,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378630439] [2021-03-10 21:15:34,158 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:15:34,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:15:34,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:34,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:15:34,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:34,279 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:34,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:34,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-03-10 21:15:34,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322121833] [2021-03-10 21:15:34,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:15:34,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:34,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:15:34,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:15:34,279 INFO L87 Difference]: Start difference. First operand 2519 states and 7688 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) [2021-03-10 21:15:34,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:34,802 INFO L93 Difference]: Finished difference Result 3834 states and 11012 transitions. [2021-03-10 21:15:34,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-03-10 21:15:34,803 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 22 [2021-03-10 21:15:34,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:34,807 INFO L225 Difference]: With dead ends: 3834 [2021-03-10 21:15:34,807 INFO L226 Difference]: Without dead ends: 3825 [2021-03-10 21:15:34,808 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 450.6ms TimeCoverageRelationStatistics Valid=728, Invalid=2352, Unknown=0, NotChecked=0, Total=3080 [2021-03-10 21:15:34,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3825 states. [2021-03-10 21:15:34,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3825 to 2573. [2021-03-10 21:15:34,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2573 states, 2572 states have (on average 3.0544323483670297) internal successors, (7856), 2572 states have internal predecessors, (7856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:34,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2573 states to 2573 states and 7856 transitions. [2021-03-10 21:15:34,845 INFO L78 Accepts]: Start accepts. Automaton has 2573 states and 7856 transitions. Word has length 22 [2021-03-10 21:15:34,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:34,845 INFO L480 AbstractCegarLoop]: Abstraction has 2573 states and 7856 transitions. [2021-03-10 21:15:34,845 INFO L481 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) [2021-03-10 21:15:34,845 INFO L276 IsEmpty]: Start isEmpty. Operand 2573 states and 7856 transitions. [2021-03-10 21:15:34,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:15:34,848 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:34,848 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:35,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable384 [2021-03-10 21:15:35,048 INFO L428 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:35,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:35,048 INFO L82 PathProgramCache]: Analyzing trace with hash 351592933, now seen corresponding path program 204 times [2021-03-10 21:15:35,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:35,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870659790] [2021-03-10 21:15:35,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:35,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:35,100 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:35,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870659790] [2021-03-10 21:15:35,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899398826] [2021-03-10 21:15:35,100 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:15:35,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:15:35,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:35,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:15:35,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:35,217 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:35,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:35,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-03-10 21:15:35,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52658875] [2021-03-10 21:15:35,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:15:35,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:35,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:15:35,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:15:35,217 INFO L87 Difference]: Start difference. First operand 2573 states and 7856 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) [2021-03-10 21:15:35,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:35,716 INFO L93 Difference]: Finished difference Result 3887 states and 11211 transitions. [2021-03-10 21:15:35,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-10 21:15:35,717 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 22 [2021-03-10 21:15:35,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:35,722 INFO L225 Difference]: With dead ends: 3887 [2021-03-10 21:15:35,722 INFO L226 Difference]: Without dead ends: 3875 [2021-03-10 21:15:35,722 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 412.7ms TimeCoverageRelationStatistics Valid=630, Invalid=2126, Unknown=0, NotChecked=0, Total=2756 [2021-03-10 21:15:35,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3875 states. [2021-03-10 21:15:35,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3875 to 2597. [2021-03-10 21:15:35,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2597 states, 2596 states have (on average 3.0543143297380584) internal successors, (7929), 2596 states have internal predecessors, (7929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:35,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2597 states to 2597 states and 7929 transitions. [2021-03-10 21:15:35,767 INFO L78 Accepts]: Start accepts. Automaton has 2597 states and 7929 transitions. Word has length 22 [2021-03-10 21:15:35,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:35,767 INFO L480 AbstractCegarLoop]: Abstraction has 2597 states and 7929 transitions. [2021-03-10 21:15:35,767 INFO L481 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) [2021-03-10 21:15:35,768 INFO L276 IsEmpty]: Start isEmpty. Operand 2597 states and 7929 transitions. [2021-03-10 21:15:35,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:15:35,770 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:35,770 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:35,970 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:35,970 INFO L428 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:35,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:35,971 INFO L82 PathProgramCache]: Analyzing trace with hash -688642865, now seen corresponding path program 205 times [2021-03-10 21:15:35,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:35,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748357896] [2021-03-10 21:15:35,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:35,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:36,025 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:36,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748357896] [2021-03-10 21:15:36,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987744122] [2021-03-10 21:15:36,026 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:36,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:36,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:15:36,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:36,147 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:36,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:36,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-03-10 21:15:36,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645469402] [2021-03-10 21:15:36,147 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:15:36,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:36,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:15:36,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:15:36,148 INFO L87 Difference]: Start difference. First operand 2597 states and 7929 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) [2021-03-10 21:15:36,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:36,578 INFO L93 Difference]: Finished difference Result 3976 states and 11538 transitions. [2021-03-10 21:15:36,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 21:15:36,578 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 22 [2021-03-10 21:15:36,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:36,582 INFO L225 Difference]: With dead ends: 3976 [2021-03-10 21:15:36,582 INFO L226 Difference]: Without dead ends: 3961 [2021-03-10 21:15:36,583 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 393.0ms TimeCoverageRelationStatistics Valid=558, Invalid=1892, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 21:15:36,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3961 states. [2021-03-10 21:15:36,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3961 to 2615. [2021-03-10 21:15:36,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2615 states, 2614 states have (on average 3.0478194338179034) internal successors, (7967), 2614 states have internal predecessors, (7967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:36,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2615 states to 2615 states and 7967 transitions. [2021-03-10 21:15:36,615 INFO L78 Accepts]: Start accepts. Automaton has 2615 states and 7967 transitions. Word has length 22 [2021-03-10 21:15:36,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:36,615 INFO L480 AbstractCegarLoop]: Abstraction has 2615 states and 7967 transitions. [2021-03-10 21:15:36,615 INFO L481 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) [2021-03-10 21:15:36,615 INFO L276 IsEmpty]: Start isEmpty. Operand 2615 states and 7967 transitions. [2021-03-10 21:15:36,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:15:36,617 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:36,617 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:36,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-03-10 21:15:36,817 INFO L428 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:36,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:36,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1423785765, now seen corresponding path program 206 times [2021-03-10 21:15:36,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:36,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426878119] [2021-03-10 21:15:36,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:36,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:36,871 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:36,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426878119] [2021-03-10 21:15:36,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619259054] [2021-03-10 21:15:36,871 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 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 [2021-03-10 21:15:36,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:15:36,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:36,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:15:36,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:36,997 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:36,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:36,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-03-10 21:15:36,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439114138] [2021-03-10 21:15:36,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:15:36,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:36,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:15:36,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:15:36,998 INFO L87 Difference]: Start difference. First operand 2615 states and 7967 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) [2021-03-10 21:15:37,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:37,291 INFO L93 Difference]: Finished difference Result 3613 states and 10545 transitions. [2021-03-10 21:15:37,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 21:15:37,292 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 22 [2021-03-10 21:15:37,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:37,295 INFO L225 Difference]: With dead ends: 3613 [2021-03-10 21:15:37,295 INFO L226 Difference]: Without dead ends: 3598 [2021-03-10 21:15:37,295 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 309.3ms TimeCoverageRelationStatistics Valid=431, Invalid=1375, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 21:15:37,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3598 states. [2021-03-10 21:15:37,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3598 to 2615. [2021-03-10 21:15:37,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2615 states, 2614 states have (on average 3.0459066564651875) internal successors, (7962), 2614 states have internal predecessors, (7962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:37,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2615 states to 2615 states and 7962 transitions. [2021-03-10 21:15:37,325 INFO L78 Accepts]: Start accepts. Automaton has 2615 states and 7962 transitions. Word has length 22 [2021-03-10 21:15:37,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:37,325 INFO L480 AbstractCegarLoop]: Abstraction has 2615 states and 7962 transitions. [2021-03-10 21:15:37,325 INFO L481 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) [2021-03-10 21:15:37,325 INFO L276 IsEmpty]: Start isEmpty. Operand 2615 states and 7962 transitions. [2021-03-10 21:15:37,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:15:37,327 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:37,327 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:37,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2021-03-10 21:15:37,527 INFO L428 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:37,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:37,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1262577295, now seen corresponding path program 207 times [2021-03-10 21:15:37,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:37,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409230877] [2021-03-10 21:15:37,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:37,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:37,574 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:37,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409230877] [2021-03-10 21:15:37,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852146101] [2021-03-10 21:15:37,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:37,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:15:37,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:37,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:15:37,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:37,696 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:37,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:37,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-03-10 21:15:37,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147310979] [2021-03-10 21:15:37,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:15:37,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:37,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:15:37,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:15:37,697 INFO L87 Difference]: Start difference. First operand 2615 states and 7962 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 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) [2021-03-10 21:15:38,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:38,272 INFO L93 Difference]: Finished difference Result 3520 states and 10061 transitions. [2021-03-10 21:15:38,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-03-10 21:15:38,273 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 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 22 [2021-03-10 21:15:38,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:38,277 INFO L225 Difference]: With dead ends: 3520 [2021-03-10 21:15:38,277 INFO L226 Difference]: Without dead ends: 3511 [2021-03-10 21:15:38,277 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 482.7ms TimeCoverageRelationStatistics Valid=1109, Invalid=1971, Unknown=0, NotChecked=0, Total=3080 [2021-03-10 21:15:38,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3511 states. [2021-03-10 21:15:38,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3511 to 2798. [2021-03-10 21:15:38,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2798 states, 2797 states have (on average 3.068287450840186) internal successors, (8582), 2797 states have internal predecessors, (8582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:38,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2798 states to 2798 states and 8582 transitions. [2021-03-10 21:15:38,308 INFO L78 Accepts]: Start accepts. Automaton has 2798 states and 8582 transitions. Word has length 22 [2021-03-10 21:15:38,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:38,309 INFO L480 AbstractCegarLoop]: Abstraction has 2798 states and 8582 transitions. [2021-03-10 21:15:38,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 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) [2021-03-10 21:15:38,309 INFO L276 IsEmpty]: Start isEmpty. Operand 2798 states and 8582 transitions. [2021-03-10 21:15:38,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:15:38,311 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:38,311 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:38,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable388,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:38,512 INFO L428 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:38,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:38,512 INFO L82 PathProgramCache]: Analyzing trace with hash 797986191, now seen corresponding path program 208 times [2021-03-10 21:15:38,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:38,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659894577] [2021-03-10 21:15:38,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:38,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:38,577 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:38,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659894577] [2021-03-10 21:15:38,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380672904] [2021-03-10 21:15:38,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:38,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:15:38,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:38,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:15:38,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:38,701 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:38,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:38,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-03-10 21:15:38,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995540440] [2021-03-10 21:15:38,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:15:38,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:38,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:15:38,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:15:38,702 INFO L87 Difference]: Start difference. First operand 2798 states and 8582 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:39,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:39,393 INFO L93 Difference]: Finished difference Result 3291 states and 9479 transitions. [2021-03-10 21:15:39,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-03-10 21:15:39,394 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:15:39,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:39,397 INFO L225 Difference]: With dead ends: 3291 [2021-03-10 21:15:39,398 INFO L226 Difference]: Without dead ends: 3283 [2021-03-10 21:15:39,398 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1057 ImplicationChecksByTransitivity, 619.5ms TimeCoverageRelationStatistics Valid=1461, Invalid=2961, Unknown=0, NotChecked=0, Total=4422 [2021-03-10 21:15:39,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3283 states. [2021-03-10 21:15:39,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3283 to 2546. [2021-03-10 21:15:39,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2546 states, 2545 states have (on average 3.0369351669941063) internal successors, (7729), 2545 states have internal predecessors, (7729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:39,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2546 states to 2546 states and 7729 transitions. [2021-03-10 21:15:39,430 INFO L78 Accepts]: Start accepts. Automaton has 2546 states and 7729 transitions. Word has length 22 [2021-03-10 21:15:39,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:39,430 INFO L480 AbstractCegarLoop]: Abstraction has 2546 states and 7729 transitions. [2021-03-10 21:15:39,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:39,430 INFO L276 IsEmpty]: Start isEmpty. Operand 2546 states and 7729 transitions. [2021-03-10 21:15:39,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:15:39,433 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:39,433 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:39,633 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-03-10 21:15:39,633 INFO L428 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:39,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:39,633 INFO L82 PathProgramCache]: Analyzing trace with hash 764386963, now seen corresponding path program 209 times [2021-03-10 21:15:39,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:39,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811490935] [2021-03-10 21:15:39,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:39,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:39,685 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:39,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811490935] [2021-03-10 21:15:39,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399914192] [2021-03-10 21:15:39,686 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:15:39,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:15:39,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:39,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:15:39,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:39,814 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:39,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:39,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-03-10 21:15:39,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029538084] [2021-03-10 21:15:39,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:15:39,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:39,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:15:39,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:15:39,814 INFO L87 Difference]: Start difference. First operand 2546 states and 7729 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) [2021-03-10 21:15:40,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:40,460 INFO L93 Difference]: Finished difference Result 2975 states and 8569 transitions. [2021-03-10 21:15:40,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-03-10 21:15:40,461 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 22 [2021-03-10 21:15:40,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:40,464 INFO L225 Difference]: With dead ends: 2975 [2021-03-10 21:15:40,464 INFO L226 Difference]: Without dead ends: 2967 [2021-03-10 21:15:40,465 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 570.2ms TimeCoverageRelationStatistics Valid=1464, Invalid=3092, Unknown=0, NotChecked=0, Total=4556 [2021-03-10 21:15:40,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2967 states. [2021-03-10 21:15:40,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2967 to 2564. [2021-03-10 21:15:40,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2564 states, 2563 states have (on average 3.037846273897776) internal successors, (7786), 2563 states have internal predecessors, (7786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:40,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2564 states to 2564 states and 7786 transitions. [2021-03-10 21:15:40,497 INFO L78 Accepts]: Start accepts. Automaton has 2564 states and 7786 transitions. Word has length 22 [2021-03-10 21:15:40,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:40,497 INFO L480 AbstractCegarLoop]: Abstraction has 2564 states and 7786 transitions. [2021-03-10 21:15:40,497 INFO L481 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) [2021-03-10 21:15:40,497 INFO L276 IsEmpty]: Start isEmpty. Operand 2564 states and 7786 transitions. [2021-03-10 21:15:40,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:15:40,500 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:40,500 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:40,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:40,700 INFO L428 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:40,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:40,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1854483403, now seen corresponding path program 210 times [2021-03-10 21:15:40,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:40,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592146337] [2021-03-10 21:15:40,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:40,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:40,745 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:40,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592146337] [2021-03-10 21:15:40,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389903567] [2021-03-10 21:15:40,746 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:40,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:15:40,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:40,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:15:40,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:40,877 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:40,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:40,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-03-10 21:15:40,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890964006] [2021-03-10 21:15:40,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:15:40,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:40,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:15:40,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:15:40,878 INFO L87 Difference]: Start difference. First operand 2564 states and 7786 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:41,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:41,466 INFO L93 Difference]: Finished difference Result 3590 states and 10196 transitions. [2021-03-10 21:15:41,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-03-10 21:15:41,467 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:15:41,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:41,471 INFO L225 Difference]: With dead ends: 3590 [2021-03-10 21:15:41,472 INFO L226 Difference]: Without dead ends: 3575 [2021-03-10 21:15:41,472 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 492.8ms TimeCoverageRelationStatistics Valid=1038, Invalid=1824, Unknown=0, NotChecked=0, Total=2862 [2021-03-10 21:15:41,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3575 states. [2021-03-10 21:15:41,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3575 to 2746. [2021-03-10 21:15:41,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2746 states, 2745 states have (on average 3.0612021857923497) internal successors, (8403), 2745 states have internal predecessors, (8403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:41,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2746 states to 2746 states and 8403 transitions. [2021-03-10 21:15:41,508 INFO L78 Accepts]: Start accepts. Automaton has 2746 states and 8403 transitions. Word has length 22 [2021-03-10 21:15:41,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:41,508 INFO L480 AbstractCegarLoop]: Abstraction has 2746 states and 8403 transitions. [2021-03-10 21:15:41,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:41,509 INFO L276 IsEmpty]: Start isEmpty. Operand 2746 states and 8403 transitions. [2021-03-10 21:15:41,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:15:41,511 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:41,511 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:41,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:41,711 INFO L428 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:41,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:41,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1389892299, now seen corresponding path program 211 times [2021-03-10 21:15:41,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:41,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70884990] [2021-03-10 21:15:41,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:41,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:41,754 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:41,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70884990] [2021-03-10 21:15:41,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110529678] [2021-03-10 21:15:41,754 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:15:41,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:41,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:15:41,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:41,882 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:41,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:41,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-03-10 21:15:41,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176651260] [2021-03-10 21:15:41,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:15:41,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:41,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:15:41,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:15:41,883 INFO L87 Difference]: Start difference. First operand 2746 states and 8403 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:42,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:42,614 INFO L93 Difference]: Finished difference Result 3290 states and 9440 transitions. [2021-03-10 21:15:42,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-03-10 21:15:42,615 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:15:42,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:42,618 INFO L225 Difference]: With dead ends: 3290 [2021-03-10 21:15:42,618 INFO L226 Difference]: Without dead ends: 3284 [2021-03-10 21:15:42,618 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 640.3ms TimeCoverageRelationStatistics Valid=1537, Invalid=3293, Unknown=0, NotChecked=0, Total=4830 [2021-03-10 21:15:42,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3284 states. [2021-03-10 21:15:42,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3284 to 2630. [2021-03-10 21:15:42,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2630 states, 2629 states have (on average 3.0441232407759604) internal successors, (8003), 2629 states have internal predecessors, (8003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:42,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2630 states to 2630 states and 8003 transitions. [2021-03-10 21:15:42,648 INFO L78 Accepts]: Start accepts. Automaton has 2630 states and 8003 transitions. Word has length 22 [2021-03-10 21:15:42,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:42,648 INFO L480 AbstractCegarLoop]: Abstraction has 2630 states and 8003 transitions. [2021-03-10 21:15:42,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:42,648 INFO L276 IsEmpty]: Start isEmpty. Operand 2630 states and 8003 transitions. [2021-03-10 21:15:42,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:15:42,650 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:42,650 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:42,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable392,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:42,851 INFO L428 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:42,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:42,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1356293071, now seen corresponding path program 212 times [2021-03-10 21:15:42,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:42,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730478626] [2021-03-10 21:15:42,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:42,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:42,904 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:42,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730478626] [2021-03-10 21:15:42,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503484273] [2021-03-10 21:15:42,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:15:42,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:15:42,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:42,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:15:42,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:43,048 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:43,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:43,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-03-10 21:15:43,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323823210] [2021-03-10 21:15:43,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:15:43,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:43,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:15:43,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:15:43,049 INFO L87 Difference]: Start difference. First operand 2630 states and 8003 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:43,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:43,748 INFO L93 Difference]: Finished difference Result 3240 states and 9276 transitions. [2021-03-10 21:15:43,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-03-10 21:15:43,749 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:15:43,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:43,752 INFO L225 Difference]: With dead ends: 3240 [2021-03-10 21:15:43,752 INFO L226 Difference]: Without dead ends: 3228 [2021-03-10 21:15:43,752 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 637.2ms TimeCoverageRelationStatistics Valid=1436, Invalid=3256, Unknown=0, NotChecked=0, Total=4692 [2021-03-10 21:15:43,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3228 states. [2021-03-10 21:15:43,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3228 to 2594. [2021-03-10 21:15:43,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2594 states, 2593 states have (on average 3.048206710374084) internal successors, (7904), 2593 states have internal predecessors, (7904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:43,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2594 states to 2594 states and 7904 transitions. [2021-03-10 21:15:43,784 INFO L78 Accepts]: Start accepts. Automaton has 2594 states and 7904 transitions. Word has length 22 [2021-03-10 21:15:43,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:43,784 INFO L480 AbstractCegarLoop]: Abstraction has 2594 states and 7904 transitions. [2021-03-10 21:15:43,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:43,784 INFO L276 IsEmpty]: Start isEmpty. Operand 2594 states and 7904 transitions. [2021-03-10 21:15:43,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:15:43,787 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:43,787 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:43,987 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:43,988 INFO L428 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:43,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:43,988 INFO L82 PathProgramCache]: Analyzing trace with hash 314717003, now seen corresponding path program 213 times [2021-03-10 21:15:43,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:43,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797733429] [2021-03-10 21:15:43,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:43,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:44,042 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:44,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797733429] [2021-03-10 21:15:44,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993251535] [2021-03-10 21:15:44,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:15:44,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:15:44,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:44,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:15:44,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:44,180 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:44,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:44,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-03-10 21:15:44,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662058330] [2021-03-10 21:15:44,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:15:44,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:44,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:15:44,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:15:44,181 INFO L87 Difference]: Start difference. First operand 2594 states and 7904 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) [2021-03-10 21:15:44,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:44,802 INFO L93 Difference]: Finished difference Result 3083 states and 8911 transitions. [2021-03-10 21:15:44,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-03-10 21:15:44,803 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 22 [2021-03-10 21:15:44,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:44,806 INFO L225 Difference]: With dead ends: 3083 [2021-03-10 21:15:44,806 INFO L226 Difference]: Without dead ends: 3071 [2021-03-10 21:15:44,807 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1270 ImplicationChecksByTransitivity, 581.5ms TimeCoverageRelationStatistics Valid=1406, Invalid=3286, Unknown=0, NotChecked=0, Total=4692 [2021-03-10 21:15:44,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3071 states. [2021-03-10 21:15:44,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3071 to 2614. [2021-03-10 21:15:44,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2614 states, 2613 states have (on average 3.050133945656334) internal successors, (7970), 2613 states have internal predecessors, (7970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:44,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2614 states to 2614 states and 7970 transitions. [2021-03-10 21:15:44,839 INFO L78 Accepts]: Start accepts. Automaton has 2614 states and 7970 transitions. Word has length 22 [2021-03-10 21:15:44,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:44,839 INFO L480 AbstractCegarLoop]: Abstraction has 2614 states and 7970 transitions. [2021-03-10 21:15:44,839 INFO L481 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) [2021-03-10 21:15:44,839 INFO L276 IsEmpty]: Start isEmpty. Operand 2614 states and 7970 transitions. [2021-03-10 21:15:44,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:15:44,841 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:44,841 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:45,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:45,042 INFO L428 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:45,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:45,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1271263729, now seen corresponding path program 214 times [2021-03-10 21:15:45,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:45,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116037750] [2021-03-10 21:15:45,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:45,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:45,080 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:45,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116037750] [2021-03-10 21:15:45,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057028262] [2021-03-10 21:15:45,081 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:45,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:15:45,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:45,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:15:45,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:45,223 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:45,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:45,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-03-10 21:15:45,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286485573] [2021-03-10 21:15:45,224 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:15:45,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:45,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:15:45,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:15:45,224 INFO L87 Difference]: Start difference. First operand 2614 states and 7970 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:45,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:45,773 INFO L93 Difference]: Finished difference Result 3813 states and 10862 transitions. [2021-03-10 21:15:45,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 21:15:45,774 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:15:45,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:45,778 INFO L225 Difference]: With dead ends: 3813 [2021-03-10 21:15:45,779 INFO L226 Difference]: Without dead ends: 3801 [2021-03-10 21:15:45,779 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 456.4ms TimeCoverageRelationStatistics Valid=966, Invalid=1686, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 21:15:45,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3801 states. [2021-03-10 21:15:45,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3801 to 2922. [2021-03-10 21:15:45,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2922 states, 2921 states have (on average 3.0708661417322833) internal successors, (8970), 2921 states have internal predecessors, (8970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:45,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2922 states to 2922 states and 8970 transitions. [2021-03-10 21:15:45,816 INFO L78 Accepts]: Start accepts. Automaton has 2922 states and 8970 transitions. Word has length 22 [2021-03-10 21:15:45,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:45,816 INFO L480 AbstractCegarLoop]: Abstraction has 2922 states and 8970 transitions. [2021-03-10 21:15:45,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:45,816 INFO L276 IsEmpty]: Start isEmpty. Operand 2922 states and 8970 transitions. [2021-03-10 21:15:45,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:15:45,819 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:45,819 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:46,019 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:46,019 INFO L428 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:46,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:46,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1735854833, now seen corresponding path program 215 times [2021-03-10 21:15:46,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:46,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229864196] [2021-03-10 21:15:46,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:46,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:46,057 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:46,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229864196] [2021-03-10 21:15:46,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083419214] [2021-03-10 21:15:46,057 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:46,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:15:46,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:46,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:15:46,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:46,212 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:46,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:46,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-03-10 21:15:46,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507383423] [2021-03-10 21:15:46,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:15:46,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:46,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:15:46,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:15:46,213 INFO L87 Difference]: Start difference. First operand 2922 states and 8970 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 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) [2021-03-10 21:15:47,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:47,004 INFO L93 Difference]: Finished difference Result 3570 states and 10279 transitions. [2021-03-10 21:15:47,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-03-10 21:15:47,005 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 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 22 [2021-03-10 21:15:47,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:47,009 INFO L225 Difference]: With dead ends: 3570 [2021-03-10 21:15:47,009 INFO L226 Difference]: Without dead ends: 3564 [2021-03-10 21:15:47,009 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1593 ImplicationChecksByTransitivity, 734.6ms TimeCoverageRelationStatistics Valid=1706, Invalid=3844, Unknown=0, NotChecked=0, Total=5550 [2021-03-10 21:15:47,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3564 states. [2021-03-10 21:15:47,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3564 to 2830. [2021-03-10 21:15:47,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2830 states, 2829 states have (on average 3.0572640509013786) internal successors, (8649), 2829 states have internal predecessors, (8649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:47,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2830 states to 2830 states and 8649 transitions. [2021-03-10 21:15:47,046 INFO L78 Accepts]: Start accepts. Automaton has 2830 states and 8649 transitions. Word has length 22 [2021-03-10 21:15:47,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:47,046 INFO L480 AbstractCegarLoop]: Abstraction has 2830 states and 8649 transitions. [2021-03-10 21:15:47,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 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) [2021-03-10 21:15:47,046 INFO L276 IsEmpty]: Start isEmpty. Operand 2830 states and 8649 transitions. [2021-03-10 21:15:47,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:15:47,049 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:47,049 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:47,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable396 [2021-03-10 21:15:47,249 INFO L428 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:47,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:47,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1769454061, now seen corresponding path program 216 times [2021-03-10 21:15:47,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:47,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664692739] [2021-03-10 21:15:47,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:47,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:47,291 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:47,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664692739] [2021-03-10 21:15:47,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467850166] [2021-03-10 21:15:47,292 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:47,310 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:15:47,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:47,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:15:47,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:47,422 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:47,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:47,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-03-10 21:15:47,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396190980] [2021-03-10 21:15:47,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:15:47,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:47,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:15:47,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:15:47,423 INFO L87 Difference]: Start difference. First operand 2830 states and 8649 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 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) [2021-03-10 21:15:48,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:48,175 INFO L93 Difference]: Finished difference Result 3572 states and 10299 transitions. [2021-03-10 21:15:48,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-03-10 21:15:48,176 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 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 22 [2021-03-10 21:15:48,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:48,180 INFO L225 Difference]: With dead ends: 3572 [2021-03-10 21:15:48,180 INFO L226 Difference]: Without dead ends: 3564 [2021-03-10 21:15:48,180 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1460 ImplicationChecksByTransitivity, 658.0ms TimeCoverageRelationStatistics Valid=1503, Invalid=3609, Unknown=0, NotChecked=0, Total=5112 [2021-03-10 21:15:48,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3564 states. [2021-03-10 21:15:48,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3564 to 2871. [2021-03-10 21:15:48,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2871 states, 2870 states have (on average 3.0609756097560976) internal successors, (8785), 2870 states have internal predecessors, (8785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:48,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2871 states to 2871 states and 8785 transitions. [2021-03-10 21:15:48,216 INFO L78 Accepts]: Start accepts. Automaton has 2871 states and 8785 transitions. Word has length 22 [2021-03-10 21:15:48,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:48,216 INFO L480 AbstractCegarLoop]: Abstraction has 2871 states and 8785 transitions. [2021-03-10 21:15:48,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 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) [2021-03-10 21:15:48,216 INFO L276 IsEmpty]: Start isEmpty. Operand 2871 states and 8785 transitions. [2021-03-10 21:15:48,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:15:48,219 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:48,219 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:48,419 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2021-03-10 21:15:48,419 INFO L428 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:48,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:48,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1483937167, now seen corresponding path program 217 times [2021-03-10 21:15:48,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:48,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535063255] [2021-03-10 21:15:48,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:48,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:48,476 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:48,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535063255] [2021-03-10 21:15:48,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636375130] [2021-03-10 21:15:48,476 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:48,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:48,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:15:48,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:48,628 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:48,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:48,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-03-10 21:15:48,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836043170] [2021-03-10 21:15:48,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:15:48,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:48,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:15:48,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:15:48,629 INFO L87 Difference]: Start difference. First operand 2871 states and 8785 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:49,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:49,345 INFO L93 Difference]: Finished difference Result 3644 states and 10545 transitions. [2021-03-10 21:15:49,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-03-10 21:15:49,345 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:15:49,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:49,350 INFO L225 Difference]: With dead ends: 3644 [2021-03-10 21:15:49,350 INFO L226 Difference]: Without dead ends: 3632 [2021-03-10 21:15:49,350 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1391 ImplicationChecksByTransitivity, 650.0ms TimeCoverageRelationStatistics Valid=1373, Invalid=3457, Unknown=0, NotChecked=0, Total=4830 [2021-03-10 21:15:49,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3632 states. [2021-03-10 21:15:49,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3632 to 2921. [2021-03-10 21:15:49,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2921 states, 2920 states have (on average 3.0705479452054796) internal successors, (8966), 2920 states have internal predecessors, (8966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:49,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2921 states to 2921 states and 8966 transitions. [2021-03-10 21:15:49,389 INFO L78 Accepts]: Start accepts. Automaton has 2921 states and 8966 transitions. Word has length 22 [2021-03-10 21:15:49,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:49,390 INFO L480 AbstractCegarLoop]: Abstraction has 2921 states and 8966 transitions. [2021-03-10 21:15:49,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:49,390 INFO L276 IsEmpty]: Start isEmpty. Operand 2921 states and 8966 transitions. [2021-03-10 21:15:49,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:15:49,392 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:49,392 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:49,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable398,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:49,594 INFO L428 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:49,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:49,594 INFO L82 PathProgramCache]: Analyzing trace with hash -740149869, now seen corresponding path program 218 times [2021-03-10 21:15:49,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:49,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62665844] [2021-03-10 21:15:49,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:49,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:49,652 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:49,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62665844] [2021-03-10 21:15:49,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918285081] [2021-03-10 21:15:49,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:49,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:15:49,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:49,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:15:49,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:49,806 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:49,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:49,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-03-10 21:15:49,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311646015] [2021-03-10 21:15:49,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:15:49,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:49,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:15:49,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:15:49,807 INFO L87 Difference]: Start difference. First operand 2921 states and 8966 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) [2021-03-10 21:15:50,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:50,439 INFO L93 Difference]: Finished difference Result 3521 states and 10275 transitions. [2021-03-10 21:15:50,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-03-10 21:15:50,439 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 22 [2021-03-10 21:15:50,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:50,443 INFO L225 Difference]: With dead ends: 3521 [2021-03-10 21:15:50,443 INFO L226 Difference]: Without dead ends: 3505 [2021-03-10 21:15:50,444 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1305 ImplicationChecksByTransitivity, 598.7ms TimeCoverageRelationStatistics Valid=1314, Invalid=3378, Unknown=0, NotChecked=0, Total=4692 [2021-03-10 21:15:50,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3505 states. [2021-03-10 21:15:50,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3505 to 2952. [2021-03-10 21:15:50,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2952 states, 2951 states have (on average 3.0701457133175194) internal successors, (9060), 2951 states have internal predecessors, (9060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:50,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 9060 transitions. [2021-03-10 21:15:50,477 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 9060 transitions. Word has length 22 [2021-03-10 21:15:50,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:50,477 INFO L480 AbstractCegarLoop]: Abstraction has 2952 states and 9060 transitions. [2021-03-10 21:15:50,477 INFO L481 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) [2021-03-10 21:15:50,477 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 9060 transitions. [2021-03-10 21:15:50,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:15:50,479 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:50,479 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:50,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-03-10 21:15:50,680 INFO L428 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:50,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:50,680 INFO L82 PathProgramCache]: Analyzing trace with hash 614822987, now seen corresponding path program 219 times [2021-03-10 21:15:50,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:50,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483188380] [2021-03-10 21:15:50,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:50,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:50,712 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:50,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483188380] [2021-03-10 21:15:50,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981182345] [2021-03-10 21:15:50,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:50,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:15:50,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:50,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:15:50,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:50,849 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:50,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:50,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 19 [2021-03-10 21:15:50,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515011156] [2021-03-10 21:15:50,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:15:50,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:50,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:15:50,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:15:50,850 INFO L87 Difference]: Start difference. First operand 2952 states and 9060 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:51,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:51,434 INFO L93 Difference]: Finished difference Result 4650 states and 13519 transitions. [2021-03-10 21:15:51,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 21:15:51,434 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:15:51,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:51,440 INFO L225 Difference]: With dead ends: 4650 [2021-03-10 21:15:51,440 INFO L226 Difference]: Without dead ends: 4641 [2021-03-10 21:15:51,440 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 462.5ms TimeCoverageRelationStatistics Valid=950, Invalid=1702, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 21:15:51,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4641 states. [2021-03-10 21:15:51,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4641 to 3535. [2021-03-10 21:15:51,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3535 states, 3534 states have (on average 3.116581777023203) internal successors, (11014), 3534 states have internal predecessors, (11014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:51,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3535 states to 3535 states and 11014 transitions. [2021-03-10 21:15:51,491 INFO L78 Accepts]: Start accepts. Automaton has 3535 states and 11014 transitions. Word has length 22 [2021-03-10 21:15:51,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:51,491 INFO L480 AbstractCegarLoop]: Abstraction has 3535 states and 11014 transitions. [2021-03-10 21:15:51,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:51,491 INFO L276 IsEmpty]: Start isEmpty. Operand 3535 states and 11014 transitions. [2021-03-10 21:15:51,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:15:51,495 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:51,495 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:51,695 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-03-10 21:15:51,695 INFO L428 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:51,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:51,696 INFO L82 PathProgramCache]: Analyzing trace with hash 150231883, now seen corresponding path program 220 times [2021-03-10 21:15:51,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:51,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256412739] [2021-03-10 21:15:51,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:51,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:51,730 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:51,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256412739] [2021-03-10 21:15:51,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035058086] [2021-03-10 21:15:51,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:51,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:15:51,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:51,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:15:51,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:51,863 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:51,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:51,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 19 [2021-03-10 21:15:51,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232712914] [2021-03-10 21:15:51,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:15:51,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:51,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:15:51,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:15:51,864 INFO L87 Difference]: Start difference. First operand 3535 states and 11014 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:52,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:52,835 INFO L93 Difference]: Finished difference Result 4324 states and 12650 transitions. [2021-03-10 21:15:52,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-03-10 21:15:52,836 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:15:52,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:52,840 INFO L225 Difference]: With dead ends: 4324 [2021-03-10 21:15:52,840 INFO L226 Difference]: Without dead ends: 4320 [2021-03-10 21:15:52,841 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2436 ImplicationChecksByTransitivity, 823.4ms TimeCoverageRelationStatistics Valid=1939, Invalid=4703, Unknown=0, NotChecked=0, Total=6642 [2021-03-10 21:15:52,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4320 states. [2021-03-10 21:15:52,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4320 to 3452. [2021-03-10 21:15:52,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3452 states, 3451 states have (on average 3.1048971312662994) internal successors, (10715), 3451 states have internal predecessors, (10715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:52,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3452 states to 3452 states and 10715 transitions. [2021-03-10 21:15:52,881 INFO L78 Accepts]: Start accepts. Automaton has 3452 states and 10715 transitions. Word has length 22 [2021-03-10 21:15:52,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:52,881 INFO L480 AbstractCegarLoop]: Abstraction has 3452 states and 10715 transitions. [2021-03-10 21:15:52,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:52,881 INFO L276 IsEmpty]: Start isEmpty. Operand 3452 states and 10715 transitions. [2021-03-10 21:15:52,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:15:52,884 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:52,884 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:53,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2021-03-10 21:15:53,085 INFO L428 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:53,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:53,085 INFO L82 PathProgramCache]: Analyzing trace with hash 116632655, now seen corresponding path program 221 times [2021-03-10 21:15:53,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:53,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775451714] [2021-03-10 21:15:53,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:53,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:53,123 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:53,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775451714] [2021-03-10 21:15:53,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868705065] [2021-03-10 21:15:53,124 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:53,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:15:53,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:53,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:15:53,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:53,290 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:53,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:53,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-03-10 21:15:53,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017048954] [2021-03-10 21:15:53,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:15:53,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:53,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:15:53,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:15:53,291 INFO L87 Difference]: Start difference. First operand 3452 states and 10715 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:54,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:54,165 INFO L93 Difference]: Finished difference Result 4399 states and 12968 transitions. [2021-03-10 21:15:54,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-03-10 21:15:54,166 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:15:54,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:54,171 INFO L225 Difference]: With dead ends: 4399 [2021-03-10 21:15:54,171 INFO L226 Difference]: Without dead ends: 4391 [2021-03-10 21:15:54,172 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2068 ImplicationChecksByTransitivity, 779.4ms TimeCoverageRelationStatistics Valid=1649, Invalid=4203, Unknown=0, NotChecked=0, Total=5852 [2021-03-10 21:15:54,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4391 states. [2021-03-10 21:15:54,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4391 to 3540. [2021-03-10 21:15:54,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3540 states, 3539 states have (on average 3.1150042384854477) internal successors, (11024), 3539 states have internal predecessors, (11024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:54,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3540 states to 3540 states and 11024 transitions. [2021-03-10 21:15:54,231 INFO L78 Accepts]: Start accepts. Automaton has 3540 states and 11024 transitions. Word has length 22 [2021-03-10 21:15:54,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:54,231 INFO L480 AbstractCegarLoop]: Abstraction has 3540 states and 11024 transitions. [2021-03-10 21:15:54,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:54,231 INFO L276 IsEmpty]: Start isEmpty. Operand 3540 states and 11024 transitions. [2021-03-10 21:15:54,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:15:54,236 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:54,236 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:54,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable402,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:54,436 INFO L428 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:54,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:54,437 INFO L82 PathProgramCache]: Analyzing trace with hash -924943413, now seen corresponding path program 222 times [2021-03-10 21:15:54,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:54,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386724936] [2021-03-10 21:15:54,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:54,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:54,481 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:54,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386724936] [2021-03-10 21:15:54,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85626777] [2021-03-10 21:15:54,481 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 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 [2021-03-10 21:15:54,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:15:54,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:54,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:15:54,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:54,627 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:54,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:54,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-03-10 21:15:54,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002297415] [2021-03-10 21:15:54,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:15:54,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:54,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:15:54,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:15:54,628 INFO L87 Difference]: Start difference. First operand 3540 states and 11024 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:55,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:55,441 INFO L93 Difference]: Finished difference Result 4554 states and 13499 transitions. [2021-03-10 21:15:55,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-03-10 21:15:55,442 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:15:55,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:55,447 INFO L225 Difference]: With dead ends: 4554 [2021-03-10 21:15:55,447 INFO L226 Difference]: Without dead ends: 4542 [2021-03-10 21:15:55,447 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1780 ImplicationChecksByTransitivity, 724.9ms TimeCoverageRelationStatistics Valid=1425, Invalid=3831, Unknown=0, NotChecked=0, Total=5256 [2021-03-10 21:15:55,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4542 states. [2021-03-10 21:15:55,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4542 to 3796. [2021-03-10 21:15:55,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3795 states have (on average 3.129907773386034) internal successors, (11878), 3795 states have internal predecessors, (11878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:55,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 11878 transitions. [2021-03-10 21:15:55,489 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 11878 transitions. Word has length 22 [2021-03-10 21:15:55,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:55,489 INFO L480 AbstractCegarLoop]: Abstraction has 3796 states and 11878 transitions. [2021-03-10 21:15:55,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:55,490 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 11878 transitions. [2021-03-10 21:15:55,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:15:55,493 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:55,493 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:55,693 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2021-03-10 21:15:55,693 INFO L428 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:55,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:55,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1145936847, now seen corresponding path program 223 times [2021-03-10 21:15:55,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:55,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693990505] [2021-03-10 21:15:55,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:55,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:55,745 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:55,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693990505] [2021-03-10 21:15:55,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280406425] [2021-03-10 21:15:55,745 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:55,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:55,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:15:55,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:55,896 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:55,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:55,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-03-10 21:15:55,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283095437] [2021-03-10 21:15:55,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:15:55,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:55,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:15:55,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:15:55,897 INFO L87 Difference]: Start difference. First operand 3796 states and 11878 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:56,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:56,640 INFO L93 Difference]: Finished difference Result 4840 states and 14458 transitions. [2021-03-10 21:15:56,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-03-10 21:15:56,641 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:15:56,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:56,647 INFO L225 Difference]: With dead ends: 4840 [2021-03-10 21:15:56,648 INFO L226 Difference]: Without dead ends: 4824 [2021-03-10 21:15:56,648 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1567 ImplicationChecksByTransitivity, 653.7ms TimeCoverageRelationStatistics Valid=1272, Invalid=3558, Unknown=0, NotChecked=0, Total=4830 [2021-03-10 21:15:56,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4824 states. [2021-03-10 21:15:56,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4824 to 4073. [2021-03-10 21:15:56,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4073 states, 4072 states have (on average 3.143909626719057) internal successors, (12802), 4072 states have internal predecessors, (12802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:56,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4073 states to 4073 states and 12802 transitions. [2021-03-10 21:15:56,701 INFO L78 Accepts]: Start accepts. Automaton has 4073 states and 12802 transitions. Word has length 22 [2021-03-10 21:15:56,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:56,701 INFO L480 AbstractCegarLoop]: Abstraction has 4073 states and 12802 transitions. [2021-03-10 21:15:56,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:56,701 INFO L276 IsEmpty]: Start isEmpty. Operand 4073 states and 12802 transitions. [2021-03-10 21:15:56,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:15:56,705 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:56,705 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:56,907 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-03-10 21:15:56,907 INFO L428 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:56,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:56,907 INFO L82 PathProgramCache]: Analyzing trace with hash 918715467, now seen corresponding path program 224 times [2021-03-10 21:15:56,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:56,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553861903] [2021-03-10 21:15:56,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:56,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:56,966 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:56,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553861903] [2021-03-10 21:15:56,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792145928] [2021-03-10 21:15:56,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:56,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:15:56,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:56,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:15:56,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:57,139 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:57,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:57,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-03-10 21:15:57,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519261513] [2021-03-10 21:15:57,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:15:57,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:57,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:15:57,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:15:57,140 INFO L87 Difference]: Start difference. First operand 4073 states and 12802 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:57,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:57,756 INFO L93 Difference]: Finished difference Result 4789 states and 14429 transitions. [2021-03-10 21:15:57,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-03-10 21:15:57,757 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:15:57,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:57,763 INFO L225 Difference]: With dead ends: 4789 [2021-03-10 21:15:57,763 INFO L226 Difference]: Without dead ends: 4769 [2021-03-10 21:15:57,763 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1391 ImplicationChecksByTransitivity, 614.6ms TimeCoverageRelationStatistics Valid=1194, Invalid=3362, Unknown=0, NotChecked=0, Total=4556 [2021-03-10 21:15:57,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4769 states. [2021-03-10 21:15:57,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4769 to 4116. [2021-03-10 21:15:57,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4116 states, 4115 states have (on average 3.143377885783718) internal successors, (12935), 4115 states have internal predecessors, (12935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:57,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4116 states to 4116 states and 12935 transitions. [2021-03-10 21:15:57,816 INFO L78 Accepts]: Start accepts. Automaton has 4116 states and 12935 transitions. Word has length 22 [2021-03-10 21:15:57,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:57,816 INFO L480 AbstractCegarLoop]: Abstraction has 4116 states and 12935 transitions. [2021-03-10 21:15:57,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:57,816 INFO L276 IsEmpty]: Start isEmpty. Operand 4116 states and 12935 transitions. [2021-03-10 21:15:57,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:15:57,820 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:57,820 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:58,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:58,021 INFO L428 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:58,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:58,021 INFO L82 PathProgramCache]: Analyzing trace with hash 124564107, now seen corresponding path program 225 times [2021-03-10 21:15:58,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:58,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160444151] [2021-03-10 21:15:58,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:58,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:58,094 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:58,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160444151] [2021-03-10 21:15:58,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413069026] [2021-03-10 21:15:58,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:15:58,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:15:58,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:58,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:15:58,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:58,205 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:58,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:58,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-03-10 21:15:58,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524630831] [2021-03-10 21:15:58,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:15:58,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:58,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:15:58,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:15:58,205 INFO L87 Difference]: Start difference. First operand 4116 states and 12935 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) [2021-03-10 21:15:58,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:58,340 INFO L93 Difference]: Finished difference Result 4973 states and 15309 transitions. [2021-03-10 21:15:58,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:15:58,341 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 22 [2021-03-10 21:15:58,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:58,346 INFO L225 Difference]: With dead ends: 4973 [2021-03-10 21:15:58,347 INFO L226 Difference]: Without dead ends: 4973 [2021-03-10 21:15:58,347 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 140.2ms TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:15:58,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4973 states. [2021-03-10 21:15:58,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4973 to 4166. [2021-03-10 21:15:58,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4166 states, 4165 states have (on average 3.1423769507803123) internal successors, (13088), 4165 states have internal predecessors, (13088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:58,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4166 states to 4166 states and 13088 transitions. [2021-03-10 21:15:58,411 INFO L78 Accepts]: Start accepts. Automaton has 4166 states and 13088 transitions. Word has length 22 [2021-03-10 21:15:58,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:58,411 INFO L480 AbstractCegarLoop]: Abstraction has 4166 states and 13088 transitions. [2021-03-10 21:15:58,411 INFO L481 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) [2021-03-10 21:15:58,411 INFO L276 IsEmpty]: Start isEmpty. Operand 4166 states and 13088 transitions. [2021-03-10 21:15:58,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:15:58,415 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:58,415 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:58,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable406 [2021-03-10 21:15:58,615 INFO L428 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:58,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:58,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1397497815, now seen corresponding path program 226 times [2021-03-10 21:15:58,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:58,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016396801] [2021-03-10 21:15:58,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:58,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:58,672 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:58,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016396801] [2021-03-10 21:15:58,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775679662] [2021-03-10 21:15:58,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:58,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:15:58,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:58,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:15:58,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:58,783 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:58,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:58,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-03-10 21:15:58,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562481425] [2021-03-10 21:15:58,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:15:58,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:58,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:15:58,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:15:58,783 INFO L87 Difference]: Start difference. First operand 4166 states and 13088 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) [2021-03-10 21:15:58,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:58,990 INFO L93 Difference]: Finished difference Result 4567 states and 14102 transitions. [2021-03-10 21:15:58,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:15:58,991 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 22 [2021-03-10 21:15:58,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:58,996 INFO L225 Difference]: With dead ends: 4567 [2021-03-10 21:15:58,996 INFO L226 Difference]: Without dead ends: 4567 [2021-03-10 21:15:58,996 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 198.1ms TimeCoverageRelationStatistics Valid=310, Invalid=620, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:15:58,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4567 states. [2021-03-10 21:15:59,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4567 to 4183. [2021-03-10 21:15:59,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4183 states, 4182 states have (on average 3.141798182687709) internal successors, (13139), 4182 states have internal predecessors, (13139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:59,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4183 states to 4183 states and 13139 transitions. [2021-03-10 21:15:59,046 INFO L78 Accepts]: Start accepts. Automaton has 4183 states and 13139 transitions. Word has length 22 [2021-03-10 21:15:59,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:59,046 INFO L480 AbstractCegarLoop]: Abstraction has 4183 states and 13139 transitions. [2021-03-10 21:15:59,046 INFO L481 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) [2021-03-10 21:15:59,046 INFO L276 IsEmpty]: Start isEmpty. Operand 4183 states and 13139 transitions. [2021-03-10 21:15:59,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:15:59,050 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:59,050 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:59,250 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:59,250 INFO L428 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:59,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:59,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1207526577, now seen corresponding path program 227 times [2021-03-10 21:15:59,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:59,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500936149] [2021-03-10 21:15:59,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:59,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:59,306 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:59,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500936149] [2021-03-10 21:15:59,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620722712] [2021-03-10 21:15:59,306 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:59,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:15:59,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:59,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:15:59,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:59,428 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:59,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:59,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-03-10 21:15:59,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897494041] [2021-03-10 21:15:59,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:15:59,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:59,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:15:59,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:15:59,429 INFO L87 Difference]: Start difference. First operand 4183 states and 13139 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) [2021-03-10 21:15:59,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:59,763 INFO L93 Difference]: Finished difference Result 4690 states and 14429 transitions. [2021-03-10 21:15:59,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:15:59,764 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 22 [2021-03-10 21:15:59,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:59,770 INFO L225 Difference]: With dead ends: 4690 [2021-03-10 21:15:59,770 INFO L226 Difference]: Without dead ends: 4690 [2021-03-10 21:15:59,770 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 274.2ms TimeCoverageRelationStatistics Valid=435, Invalid=897, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:15:59,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4690 states. [2021-03-10 21:15:59,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4690 to 4200. [2021-03-10 21:15:59,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4200 states, 4199 states have (on average 3.141224100976423) internal successors, (13190), 4199 states have internal predecessors, (13190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:59,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4200 states to 4200 states and 13190 transitions. [2021-03-10 21:15:59,821 INFO L78 Accepts]: Start accepts. Automaton has 4200 states and 13190 transitions. Word has length 22 [2021-03-10 21:15:59,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:59,821 INFO L480 AbstractCegarLoop]: Abstraction has 4200 states and 13190 transitions. [2021-03-10 21:15:59,821 INFO L481 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) [2021-03-10 21:15:59,821 INFO L276 IsEmpty]: Start isEmpty. Operand 4200 states and 13190 transitions. [2021-03-10 21:15:59,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:15:59,826 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:59,826 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:00,026 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable408 [2021-03-10 21:16:00,026 INFO L428 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:00,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:00,026 INFO L82 PathProgramCache]: Analyzing trace with hash -321728297, now seen corresponding path program 228 times [2021-03-10 21:16:00,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:00,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740955549] [2021-03-10 21:16:00,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:00,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:00,103 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:00,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740955549] [2021-03-10 21:16:00,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549640943] [2021-03-10 21:16:00,103 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:00,122 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:16:00,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:00,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:16:00,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:00,218 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:00,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:00,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-03-10 21:16:00,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436378861] [2021-03-10 21:16:00,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:16:00,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:00,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:16:00,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:16:00,219 INFO L87 Difference]: Start difference. First operand 4200 states and 13190 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) [2021-03-10 21:16:00,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:00,736 INFO L93 Difference]: Finished difference Result 4708 states and 14414 transitions. [2021-03-10 21:16:00,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 21:16:00,736 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 22 [2021-03-10 21:16:00,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:00,742 INFO L225 Difference]: With dead ends: 4708 [2021-03-10 21:16:00,742 INFO L226 Difference]: Without dead ends: 4708 [2021-03-10 21:16:00,742 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 421.5ms TimeCoverageRelationStatistics Valid=756, Invalid=1500, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 21:16:00,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4708 states. [2021-03-10 21:16:00,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4708 to 4231. [2021-03-10 21:16:00,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4231 states, 4230 states have (on average 3.1397163120567377) internal successors, (13281), 4230 states have internal predecessors, (13281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:00,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4231 states to 4231 states and 13281 transitions. [2021-03-10 21:16:00,792 INFO L78 Accepts]: Start accepts. Automaton has 4231 states and 13281 transitions. Word has length 22 [2021-03-10 21:16:00,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:00,793 INFO L480 AbstractCegarLoop]: Abstraction has 4231 states and 13281 transitions. [2021-03-10 21:16:00,793 INFO L481 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) [2021-03-10 21:16:00,793 INFO L276 IsEmpty]: Start isEmpty. Operand 4231 states and 13281 transitions. [2021-03-10 21:16:00,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:16:00,797 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:00,797 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:00,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:00,998 INFO L428 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:00,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:00,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1785055823, now seen corresponding path program 229 times [2021-03-10 21:16:00,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:00,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353857130] [2021-03-10 21:16:00,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:01,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:01,061 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:01,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353857130] [2021-03-10 21:16:01,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470298897] [2021-03-10 21:16:01,062 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:01,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:01,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:16:01,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:01,181 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:01,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:01,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-03-10 21:16:01,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279888059] [2021-03-10 21:16:01,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:16:01,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:01,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:16:01,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:16:01,182 INFO L87 Difference]: Start difference. First operand 4231 states and 13281 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) [2021-03-10 21:16:01,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:01,836 INFO L93 Difference]: Finished difference Result 4892 states and 14848 transitions. [2021-03-10 21:16:01,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-10 21:16:01,837 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 22 [2021-03-10 21:16:01,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:01,843 INFO L225 Difference]: With dead ends: 4892 [2021-03-10 21:16:01,843 INFO L226 Difference]: Without dead ends: 4892 [2021-03-10 21:16:01,843 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 522.1ms TimeCoverageRelationStatistics Valid=1057, Invalid=2023, Unknown=0, NotChecked=0, Total=3080 [2021-03-10 21:16:01,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4892 states. [2021-03-10 21:16:01,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4892 to 4293. [2021-03-10 21:16:01,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4293 states, 4292 states have (on average 3.140959925442684) internal successors, (13481), 4292 states have internal predecessors, (13481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:01,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4293 states to 4293 states and 13481 transitions. [2021-03-10 21:16:01,895 INFO L78 Accepts]: Start accepts. Automaton has 4293 states and 13481 transitions. Word has length 22 [2021-03-10 21:16:01,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:01,896 INFO L480 AbstractCegarLoop]: Abstraction has 4293 states and 13481 transitions. [2021-03-10 21:16:01,896 INFO L481 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) [2021-03-10 21:16:01,896 INFO L276 IsEmpty]: Start isEmpty. Operand 4293 states and 13481 transitions. [2021-03-10 21:16:01,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:16:01,900 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:01,900 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:02,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-03-10 21:16:02,101 INFO L428 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:02,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:02,101 INFO L82 PathProgramCache]: Analyzing trace with hash -363740713, now seen corresponding path program 230 times [2021-03-10 21:16:02,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:02,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899532430] [2021-03-10 21:16:02,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:02,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:02,158 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:02,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899532430] [2021-03-10 21:16:02,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670186120] [2021-03-10 21:16:02,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:02,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:16:02,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:02,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:16:02,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:02,273 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:02,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:02,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-03-10 21:16:02,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91152450] [2021-03-10 21:16:02,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:16:02,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:02,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:16:02,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:16:02,274 INFO L87 Difference]: Start difference. First operand 4293 states and 13481 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) [2021-03-10 21:16:02,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:02,952 INFO L93 Difference]: Finished difference Result 5068 states and 15287 transitions. [2021-03-10 21:16:02,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-10 21:16:02,953 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 22 [2021-03-10 21:16:02,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:02,959 INFO L225 Difference]: With dead ends: 5068 [2021-03-10 21:16:02,959 INFO L226 Difference]: Without dead ends: 5068 [2021-03-10 21:16:02,959 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 546.0ms TimeCoverageRelationStatistics Valid=1188, Invalid=2118, Unknown=0, NotChecked=0, Total=3306 [2021-03-10 21:16:02,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5068 states. [2021-03-10 21:16:03,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5068 to 4271. [2021-03-10 21:16:03,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4271 states, 4270 states have (on average 3.1475409836065573) internal successors, (13440), 4270 states have internal predecessors, (13440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:03,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4271 states to 4271 states and 13440 transitions. [2021-03-10 21:16:03,008 INFO L78 Accepts]: Start accepts. Automaton has 4271 states and 13440 transitions. Word has length 22 [2021-03-10 21:16:03,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:03,008 INFO L480 AbstractCegarLoop]: Abstraction has 4271 states and 13440 transitions. [2021-03-10 21:16:03,009 INFO L481 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) [2021-03-10 21:16:03,009 INFO L276 IsEmpty]: Start isEmpty. Operand 4271 states and 13440 transitions. [2021-03-10 21:16:03,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:16:03,012 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:03,013 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:03,213 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-03-10 21:16:03,213 INFO L428 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:03,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:03,213 INFO L82 PathProgramCache]: Analyzing trace with hash 207714093, now seen corresponding path program 231 times [2021-03-10 21:16:03,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:03,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40395867] [2021-03-10 21:16:03,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:03,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:03,273 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:03,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40395867] [2021-03-10 21:16:03,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043762236] [2021-03-10 21:16:03,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:03,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:16:03,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:03,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:16:03,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:03,394 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:03,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:03,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-03-10 21:16:03,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90092971] [2021-03-10 21:16:03,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:16:03,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:03,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:16:03,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:16:03,395 INFO L87 Difference]: Start difference. First operand 4271 states and 13440 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) [2021-03-10 21:16:04,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:04,079 INFO L93 Difference]: Finished difference Result 4740 states and 14442 transitions. [2021-03-10 21:16:04,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-03-10 21:16:04,079 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 22 [2021-03-10 21:16:04,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:04,086 INFO L225 Difference]: With dead ends: 4740 [2021-03-10 21:16:04,086 INFO L226 Difference]: Without dead ends: 4734 [2021-03-10 21:16:04,086 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 586.6ms TimeCoverageRelationStatistics Valid=1484, Invalid=2806, Unknown=0, NotChecked=0, Total=4290 [2021-03-10 21:16:04,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4734 states. [2021-03-10 21:16:04,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4734 to 4087. [2021-03-10 21:16:04,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4087 states, 4086 states have (on average 3.137542829172785) internal successors, (12820), 4086 states have internal predecessors, (12820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:04,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4087 states to 4087 states and 12820 transitions. [2021-03-10 21:16:04,145 INFO L78 Accepts]: Start accepts. Automaton has 4087 states and 12820 transitions. Word has length 22 [2021-03-10 21:16:04,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:04,145 INFO L480 AbstractCegarLoop]: Abstraction has 4087 states and 12820 transitions. [2021-03-10 21:16:04,145 INFO L481 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) [2021-03-10 21:16:04,145 INFO L276 IsEmpty]: Start isEmpty. Operand 4087 states and 12820 transitions. [2021-03-10 21:16:04,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:16:04,149 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:04,149 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:04,350 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable412 [2021-03-10 21:16:04,350 INFO L428 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:04,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:04,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1723857453, now seen corresponding path program 232 times [2021-03-10 21:16:04,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:04,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845673366] [2021-03-10 21:16:04,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:04,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:04,405 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:04,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845673366] [2021-03-10 21:16:04,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169428367] [2021-03-10 21:16:04,406 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 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 [2021-03-10 21:16:04,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:16:04,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:04,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:16:04,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:04,528 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:04,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:04,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-03-10 21:16:04,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357948505] [2021-03-10 21:16:04,529 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:16:04,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:04,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:16:04,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:16:04,529 INFO L87 Difference]: Start difference. First operand 4087 states and 12820 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:05,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:05,146 INFO L93 Difference]: Finished difference Result 5641 states and 17112 transitions. [2021-03-10 21:16:05,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-03-10 21:16:05,146 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:16:05,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:05,153 INFO L225 Difference]: With dead ends: 5641 [2021-03-10 21:16:05,153 INFO L226 Difference]: Without dead ends: 5629 [2021-03-10 21:16:05,153 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 490.0ms TimeCoverageRelationStatistics Valid=837, Invalid=1713, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 21:16:05,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5629 states. [2021-03-10 21:16:05,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5629 to 4769. [2021-03-10 21:16:05,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4769 states, 4768 states have (on average 3.1621224832214767) internal successors, (15077), 4768 states have internal predecessors, (15077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:05,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4769 states to 4769 states and 15077 transitions. [2021-03-10 21:16:05,217 INFO L78 Accepts]: Start accepts. Automaton has 4769 states and 15077 transitions. Word has length 22 [2021-03-10 21:16:05,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:05,217 INFO L480 AbstractCegarLoop]: Abstraction has 4769 states and 15077 transitions. [2021-03-10 21:16:05,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:05,217 INFO L276 IsEmpty]: Start isEmpty. Operand 4769 states and 15077 transitions. [2021-03-10 21:16:05,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:16:05,222 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:05,222 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:05,422 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable413,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:05,422 INFO L428 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:05,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:05,423 INFO L82 PathProgramCache]: Analyzing trace with hash 2106518739, now seen corresponding path program 233 times [2021-03-10 21:16:05,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:05,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085446151] [2021-03-10 21:16:05,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:05,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:05,481 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:05,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085446151] [2021-03-10 21:16:05,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644114116] [2021-03-10 21:16:05,482 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 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 [2021-03-10 21:16:05,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:16:05,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:05,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:16:05,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:05,610 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:05,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:05,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-03-10 21:16:05,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673582350] [2021-03-10 21:16:05,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:16:05,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:05,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:16:05,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:16:05,611 INFO L87 Difference]: Start difference. First operand 4769 states and 15077 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) [2021-03-10 21:16:06,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:06,273 INFO L93 Difference]: Finished difference Result 5550 states and 16864 transitions. [2021-03-10 21:16:06,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-03-10 21:16:06,274 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 22 [2021-03-10 21:16:06,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:06,280 INFO L225 Difference]: With dead ends: 5550 [2021-03-10 21:16:06,280 INFO L226 Difference]: Without dead ends: 5546 [2021-03-10 21:16:06,281 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 527.4ms TimeCoverageRelationStatistics Valid=851, Invalid=2571, Unknown=0, NotChecked=0, Total=3422 [2021-03-10 21:16:06,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5546 states. [2021-03-10 21:16:06,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5546 to 4533. [2021-03-10 21:16:06,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4533 states, 4532 states have (on average 3.1385701676963813) internal successors, (14224), 4532 states have internal predecessors, (14224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:06,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4533 states to 4533 states and 14224 transitions. [2021-03-10 21:16:06,339 INFO L78 Accepts]: Start accepts. Automaton has 4533 states and 14224 transitions. Word has length 22 [2021-03-10 21:16:06,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:06,340 INFO L480 AbstractCegarLoop]: Abstraction has 4533 states and 14224 transitions. [2021-03-10 21:16:06,340 INFO L481 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) [2021-03-10 21:16:06,340 INFO L276 IsEmpty]: Start isEmpty. Operand 4533 states and 14224 transitions. [2021-03-10 21:16:06,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:16:06,344 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:06,344 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:06,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2021-03-10 21:16:06,545 INFO L428 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:06,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:06,545 INFO L82 PathProgramCache]: Analyzing trace with hash 2072919511, now seen corresponding path program 234 times [2021-03-10 21:16:06,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:06,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402835183] [2021-03-10 21:16:06,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:06,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:06,602 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:06,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402835183] [2021-03-10 21:16:06,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174139754] [2021-03-10 21:16:06,602 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:16:06,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:16:06,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:06,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:16:06,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:06,729 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:06,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:06,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-03-10 21:16:06,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546658388] [2021-03-10 21:16:06,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:16:06,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:06,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:16:06,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:16:06,729 INFO L87 Difference]: Start difference. First operand 4533 states and 14224 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) [2021-03-10 21:16:07,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:07,325 INFO L93 Difference]: Finished difference Result 5471 states and 16546 transitions. [2021-03-10 21:16:07,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-03-10 21:16:07,326 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 22 [2021-03-10 21:16:07,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:07,332 INFO L225 Difference]: With dead ends: 5471 [2021-03-10 21:16:07,332 INFO L226 Difference]: Without dead ends: 5463 [2021-03-10 21:16:07,332 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 481.9ms TimeCoverageRelationStatistics Valid=728, Invalid=2352, Unknown=0, NotChecked=0, Total=3080 [2021-03-10 21:16:07,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5463 states. [2021-03-10 21:16:07,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5463 to 4659. [2021-03-10 21:16:07,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4659 states, 4658 states have (on average 3.1386861313868613) internal successors, (14620), 4658 states have internal predecessors, (14620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:07,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4659 states to 4659 states and 14620 transitions. [2021-03-10 21:16:07,388 INFO L78 Accepts]: Start accepts. Automaton has 4659 states and 14620 transitions. Word has length 22 [2021-03-10 21:16:07,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:07,388 INFO L480 AbstractCegarLoop]: Abstraction has 4659 states and 14620 transitions. [2021-03-10 21:16:07,388 INFO L481 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) [2021-03-10 21:16:07,388 INFO L276 IsEmpty]: Start isEmpty. Operand 4659 states and 14620 transitions. [2021-03-10 21:16:07,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:16:07,393 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:07,393 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:07,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable415,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:07,594 INFO L428 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:07,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:07,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1031343443, now seen corresponding path program 235 times [2021-03-10 21:16:07,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:07,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153216288] [2021-03-10 21:16:07,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:07,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:07,646 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:07,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153216288] [2021-03-10 21:16:07,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498488349] [2021-03-10 21:16:07,646 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:07,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:07,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:16:07,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:07,769 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:07,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:07,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-03-10 21:16:07,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514532307] [2021-03-10 21:16:07,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:16:07,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:07,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:16:07,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:16:07,770 INFO L87 Difference]: Start difference. First operand 4659 states and 14620 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) [2021-03-10 21:16:08,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:08,314 INFO L93 Difference]: Finished difference Result 5651 states and 17165 transitions. [2021-03-10 21:16:08,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-10 21:16:08,315 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 22 [2021-03-10 21:16:08,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:08,321 INFO L225 Difference]: With dead ends: 5651 [2021-03-10 21:16:08,322 INFO L226 Difference]: Without dead ends: 5639 [2021-03-10 21:16:08,322 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 435.8ms TimeCoverageRelationStatistics Valid=630, Invalid=2126, Unknown=0, NotChecked=0, Total=2756 [2021-03-10 21:16:08,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5639 states. [2021-03-10 21:16:08,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5639 to 4746. [2021-03-10 21:16:08,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4746 states, 4745 states have (on average 3.134668071654373) internal successors, (14874), 4745 states have internal predecessors, (14874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:08,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4746 states to 4746 states and 14874 transitions. [2021-03-10 21:16:08,394 INFO L78 Accepts]: Start accepts. Automaton has 4746 states and 14874 transitions. Word has length 22 [2021-03-10 21:16:08,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:08,395 INFO L480 AbstractCegarLoop]: Abstraction has 4746 states and 14874 transitions. [2021-03-10 21:16:08,395 INFO L481 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) [2021-03-10 21:16:08,395 INFO L276 IsEmpty]: Start isEmpty. Operand 4746 states and 14874 transitions. [2021-03-10 21:16:08,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:16:08,399 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:08,399 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:08,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:08,600 INFO L428 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:08,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:08,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1192743593, now seen corresponding path program 236 times [2021-03-10 21:16:08,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:08,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812514695] [2021-03-10 21:16:08,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:08,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:08,655 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:08,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812514695] [2021-03-10 21:16:08,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351148931] [2021-03-10 21:16:08,655 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 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 [2021-03-10 21:16:08,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:16:08,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:08,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:16:08,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:08,781 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:08,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:08,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-03-10 21:16:08,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660335547] [2021-03-10 21:16:08,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:16:08,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:08,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:16:08,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:16:08,782 INFO L87 Difference]: Start difference. First operand 4746 states and 14874 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) [2021-03-10 21:16:09,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:09,254 INFO L93 Difference]: Finished difference Result 5785 states and 17615 transitions. [2021-03-10 21:16:09,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 21:16:09,255 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 22 [2021-03-10 21:16:09,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:09,261 INFO L225 Difference]: With dead ends: 5785 [2021-03-10 21:16:09,261 INFO L226 Difference]: Without dead ends: 5769 [2021-03-10 21:16:09,262 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 414.4ms TimeCoverageRelationStatistics Valid=558, Invalid=1892, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 21:16:09,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5769 states. [2021-03-10 21:16:09,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5769 to 4762. [2021-03-10 21:16:09,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4762 states, 4761 states have (on average 3.131064902331443) internal successors, (14907), 4761 states have internal predecessors, (14907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:09,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4762 states to 4762 states and 14907 transitions. [2021-03-10 21:16:09,316 INFO L78 Accepts]: Start accepts. Automaton has 4762 states and 14907 transitions. Word has length 22 [2021-03-10 21:16:09,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:09,316 INFO L480 AbstractCegarLoop]: Abstraction has 4762 states and 14907 transitions. [2021-03-10 21:16:09,316 INFO L481 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) [2021-03-10 21:16:09,317 INFO L276 IsEmpty]: Start isEmpty. Operand 4762 states and 14907 transitions. [2021-03-10 21:16:09,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:16:09,321 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:09,321 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:09,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable417 [2021-03-10 21:16:09,523 INFO L428 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:09,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:09,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1419964973, now seen corresponding path program 237 times [2021-03-10 21:16:09,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:09,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911907366] [2021-03-10 21:16:09,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:09,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:09,581 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:09,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911907366] [2021-03-10 21:16:09,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118249157] [2021-03-10 21:16:09,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:09,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:16:09,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:09,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:16:09,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:09,731 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:09,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:09,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-03-10 21:16:09,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810050345] [2021-03-10 21:16:09,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:16:09,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:09,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:16:09,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:16:09,732 INFO L87 Difference]: Start difference. First operand 4762 states and 14907 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) [2021-03-10 21:16:10,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:10,067 INFO L93 Difference]: Finished difference Result 5323 states and 16253 transitions. [2021-03-10 21:16:10,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 21:16:10,068 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 22 [2021-03-10 21:16:10,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:10,075 INFO L225 Difference]: With dead ends: 5323 [2021-03-10 21:16:10,076 INFO L226 Difference]: Without dead ends: 5313 [2021-03-10 21:16:10,076 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 341.3ms TimeCoverageRelationStatistics Valid=431, Invalid=1375, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 21:16:10,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5313 states. [2021-03-10 21:16:10,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5313 to 4762. [2021-03-10 21:16:10,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4762 states, 4761 states have (on average 3.1300147027935306) internal successors, (14902), 4761 states have internal predecessors, (14902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:10,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4762 states to 4762 states and 14902 transitions. [2021-03-10 21:16:10,136 INFO L78 Accepts]: Start accepts. Automaton has 4762 states and 14902 transitions. Word has length 22 [2021-03-10 21:16:10,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:10,137 INFO L480 AbstractCegarLoop]: Abstraction has 4762 states and 14902 transitions. [2021-03-10 21:16:10,137 INFO L481 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) [2021-03-10 21:16:10,137 INFO L276 IsEmpty]: Start isEmpty. Operand 4762 states and 14902 transitions. [2021-03-10 21:16:10,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:16:10,141 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:10,141 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:10,342 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:10,342 INFO L428 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:10,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:10,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1143175849, now seen corresponding path program 238 times [2021-03-10 21:16:10,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:10,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014408645] [2021-03-10 21:16:10,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:10,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:10,418 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:10,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014408645] [2021-03-10 21:16:10,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216518210] [2021-03-10 21:16:10,418 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:10,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:16:10,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:10,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:16:10,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:10,537 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:10,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:10,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-03-10 21:16:10,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23486231] [2021-03-10 21:16:10,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:16:10,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:10,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:16:10,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:16:10,538 INFO L87 Difference]: Start difference. First operand 4762 states and 14902 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) [2021-03-10 21:16:10,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:10,676 INFO L93 Difference]: Finished difference Result 5170 states and 15985 transitions. [2021-03-10 21:16:10,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:16:10,676 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 22 [2021-03-10 21:16:10,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:10,683 INFO L225 Difference]: With dead ends: 5170 [2021-03-10 21:16:10,683 INFO L226 Difference]: Without dead ends: 5158 [2021-03-10 21:16:10,683 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 192.5ms TimeCoverageRelationStatistics Valid=213, Invalid=599, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:16:10,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5158 states. [2021-03-10 21:16:10,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5158 to 4762. [2021-03-10 21:16:10,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4762 states, 4761 states have (on average 3.1298046628859484) internal successors, (14901), 4761 states have internal predecessors, (14901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:10,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4762 states to 4762 states and 14901 transitions. [2021-03-10 21:16:10,758 INFO L78 Accepts]: Start accepts. Automaton has 4762 states and 14901 transitions. Word has length 22 [2021-03-10 21:16:10,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:10,758 INFO L480 AbstractCegarLoop]: Abstraction has 4762 states and 14901 transitions. [2021-03-10 21:16:10,758 INFO L481 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) [2021-03-10 21:16:10,758 INFO L276 IsEmpty]: Start isEmpty. Operand 4762 states and 14901 transitions. [2021-03-10 21:16:10,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:16:10,763 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:10,763 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:10,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:10,964 INFO L428 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:10,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:10,964 INFO L82 PathProgramCache]: Analyzing trace with hash -2091230197, now seen corresponding path program 239 times [2021-03-10 21:16:10,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:10,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193427698] [2021-03-10 21:16:10,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:10,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:11,024 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:11,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193427698] [2021-03-10 21:16:11,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918102917] [2021-03-10 21:16:11,025 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:11,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:16:11,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:11,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:16:11,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:11,160 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:11,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:11,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-03-10 21:16:11,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63073152] [2021-03-10 21:16:11,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:16:11,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:11,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:16:11,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:16:11,161 INFO L87 Difference]: Start difference. First operand 4762 states and 14901 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) [2021-03-10 21:16:11,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:11,669 INFO L93 Difference]: Finished difference Result 5204 states and 15992 transitions. [2021-03-10 21:16:11,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 21:16:11,670 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 22 [2021-03-10 21:16:11,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:11,676 INFO L225 Difference]: With dead ends: 5204 [2021-03-10 21:16:11,676 INFO L226 Difference]: Without dead ends: 5204 [2021-03-10 21:16:11,676 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 430.3ms TimeCoverageRelationStatistics Valid=785, Invalid=1665, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 21:16:11,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5204 states. [2021-03-10 21:16:11,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5204 to 4777. [2021-03-10 21:16:11,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4777 states, 4776 states have (on average 3.129396984924623) internal successors, (14946), 4776 states have internal predecessors, (14946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:11,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4777 states to 4777 states and 14946 transitions. [2021-03-10 21:16:11,734 INFO L78 Accepts]: Start accepts. Automaton has 4777 states and 14946 transitions. Word has length 22 [2021-03-10 21:16:11,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:11,734 INFO L480 AbstractCegarLoop]: Abstraction has 4777 states and 14946 transitions. [2021-03-10 21:16:11,734 INFO L481 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) [2021-03-10 21:16:11,734 INFO L276 IsEmpty]: Start isEmpty. Operand 4777 states and 14946 transitions. [2021-03-10 21:16:11,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:16:11,739 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:11,739 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:11,939 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-03-10 21:16:11,939 INFO L428 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:11,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:11,939 INFO L82 PathProgramCache]: Analyzing trace with hash 447335179, now seen corresponding path program 240 times [2021-03-10 21:16:11,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:11,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179167962] [2021-03-10 21:16:11,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:11,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:11,988 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:11,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179167962] [2021-03-10 21:16:11,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930948114] [2021-03-10 21:16:11,988 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:12,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:16:12,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:12,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:16:12,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:12,110 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:12,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:12,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-03-10 21:16:12,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167393178] [2021-03-10 21:16:12,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:16:12,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:12,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:16:12,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:16:12,111 INFO L87 Difference]: Start difference. First operand 4777 states and 14946 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) [2021-03-10 21:16:12,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:12,570 INFO L93 Difference]: Finished difference Result 5391 states and 16437 transitions. [2021-03-10 21:16:12,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 21:16:12,571 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 22 [2021-03-10 21:16:12,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:12,577 INFO L225 Difference]: With dead ends: 5391 [2021-03-10 21:16:12,577 INFO L226 Difference]: Without dead ends: 5381 [2021-03-10 21:16:12,577 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 369.8ms TimeCoverageRelationStatistics Valid=600, Invalid=1292, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 21:16:12,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5381 states. [2021-03-10 21:16:12,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5381 to 4798. [2021-03-10 21:16:12,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4798 states, 4797 states have (on average 3.128413591828226) internal successors, (15007), 4797 states have internal predecessors, (15007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:12,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4798 states to 4798 states and 15007 transitions. [2021-03-10 21:16:12,635 INFO L78 Accepts]: Start accepts. Automaton has 4798 states and 15007 transitions. Word has length 22 [2021-03-10 21:16:12,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:12,635 INFO L480 AbstractCegarLoop]: Abstraction has 4798 states and 15007 transitions. [2021-03-10 21:16:12,635 INFO L481 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) [2021-03-10 21:16:12,635 INFO L276 IsEmpty]: Start isEmpty. Operand 4798 states and 15007 transitions. [2021-03-10 21:16:12,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:16:12,640 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:12,640 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:12,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-03-10 21:16:12,841 INFO L428 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:12,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:12,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1271890933, now seen corresponding path program 241 times [2021-03-10 21:16:12,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:12,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758238109] [2021-03-10 21:16:12,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:12,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:12,890 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:12,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758238109] [2021-03-10 21:16:12,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663207970] [2021-03-10 21:16:12,890 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:12,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:12,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:16:12,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:13,014 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:13,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:13,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-03-10 21:16:13,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535728298] [2021-03-10 21:16:13,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:16:13,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:13,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:16:13,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:16:13,015 INFO L87 Difference]: Start difference. First operand 4798 states and 15007 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) [2021-03-10 21:16:13,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:13,482 INFO L93 Difference]: Finished difference Result 5359 states and 16352 transitions. [2021-03-10 21:16:13,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 21:16:13,482 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:16:13,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:13,489 INFO L225 Difference]: With dead ends: 5359 [2021-03-10 21:16:13,489 INFO L226 Difference]: Without dead ends: 5349 [2021-03-10 21:16:13,490 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 367.4ms TimeCoverageRelationStatistics Valid=608, Invalid=1284, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 21:16:13,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5349 states. [2021-03-10 21:16:13,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5349 to 4815. [2021-03-10 21:16:13,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4815 states, 4814 states have (on average 3.1258828417116744) internal successors, (15048), 4814 states have internal predecessors, (15048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:13,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4815 states to 4815 states and 15048 transitions. [2021-03-10 21:16:13,555 INFO L78 Accepts]: Start accepts. Automaton has 4815 states and 15048 transitions. Word has length 22 [2021-03-10 21:16:13,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:13,555 INFO L480 AbstractCegarLoop]: Abstraction has 4815 states and 15048 transitions. [2021-03-10 21:16:13,555 INFO L481 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) [2021-03-10 21:16:13,555 INFO L276 IsEmpty]: Start isEmpty. Operand 4815 states and 15048 transitions. [2021-03-10 21:16:13,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:16:13,561 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:13,561 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:13,767 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-03-10 21:16:13,767 INFO L428 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:13,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:13,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1720691467, now seen corresponding path program 242 times [2021-03-10 21:16:13,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:13,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422572465] [2021-03-10 21:16:13,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:13,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:13,843 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:13,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422572465] [2021-03-10 21:16:13,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795813352] [2021-03-10 21:16:13,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:13,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:16:13,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:13,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:16:13,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:13,971 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:13,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:13,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-03-10 21:16:13,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763733715] [2021-03-10 21:16:13,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:16:13,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:13,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:16:13,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:16:13,972 INFO L87 Difference]: Start difference. First operand 4815 states and 15048 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) [2021-03-10 21:16:14,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:14,570 INFO L93 Difference]: Finished difference Result 5632 states and 17049 transitions. [2021-03-10 21:16:14,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 21:16:14,571 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 22 [2021-03-10 21:16:14,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:14,578 INFO L225 Difference]: With dead ends: 5632 [2021-03-10 21:16:14,578 INFO L226 Difference]: Without dead ends: 5628 [2021-03-10 21:16:14,579 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 518.1ms TimeCoverageRelationStatistics Valid=940, Invalid=1816, Unknown=0, NotChecked=0, Total=2756 [2021-03-10 21:16:14,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5628 states. [2021-03-10 21:16:14,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5628 to 4825. [2021-03-10 21:16:14,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4825 states, 4824 states have (on average 3.1237562189054726) internal successors, (15069), 4824 states have internal predecessors, (15069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:14,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4825 states to 4825 states and 15069 transitions. [2021-03-10 21:16:14,641 INFO L78 Accepts]: Start accepts. Automaton has 4825 states and 15069 transitions. Word has length 22 [2021-03-10 21:16:14,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:14,641 INFO L480 AbstractCegarLoop]: Abstraction has 4825 states and 15069 transitions. [2021-03-10 21:16:14,641 INFO L481 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) [2021-03-10 21:16:14,641 INFO L276 IsEmpty]: Start isEmpty. Operand 4825 states and 15069 transitions. [2021-03-10 21:16:14,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:16:14,647 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:14,647 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:14,849 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable423,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:14,849 INFO L428 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:14,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:14,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1678679051, now seen corresponding path program 243 times [2021-03-10 21:16:14,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:14,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649715856] [2021-03-10 21:16:14,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:14,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:14,899 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:14,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649715856] [2021-03-10 21:16:14,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888461020] [2021-03-10 21:16:14,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:14,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:16:14,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:14,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:16:14,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:15,026 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:15,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:15,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-03-10 21:16:15,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561673302] [2021-03-10 21:16:15,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:16:15,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:15,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:16:15,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:16:15,027 INFO L87 Difference]: Start difference. First operand 4825 states and 15069 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) [2021-03-10 21:16:15,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:15,695 INFO L93 Difference]: Finished difference Result 5908 states and 17767 transitions. [2021-03-10 21:16:15,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-03-10 21:16:15,695 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 22 [2021-03-10 21:16:15,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:15,702 INFO L225 Difference]: With dead ends: 5908 [2021-03-10 21:16:15,702 INFO L226 Difference]: Without dead ends: 5908 [2021-03-10 21:16:15,702 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 551.0ms TimeCoverageRelationStatistics Valid=1109, Invalid=1971, Unknown=0, NotChecked=0, Total=3080 [2021-03-10 21:16:15,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5908 states. [2021-03-10 21:16:15,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5908 to 4874. [2021-03-10 21:16:15,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4874 states, 4873 states have (on average 3.1329776318489637) internal successors, (15267), 4873 states have internal predecessors, (15267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:15,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4874 states to 4874 states and 15267 transitions. [2021-03-10 21:16:15,758 INFO L78 Accepts]: Start accepts. Automaton has 4874 states and 15267 transitions. Word has length 22 [2021-03-10 21:16:15,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:15,758 INFO L480 AbstractCegarLoop]: Abstraction has 4874 states and 15267 transitions. [2021-03-10 21:16:15,758 INFO L481 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) [2021-03-10 21:16:15,758 INFO L276 IsEmpty]: Start isEmpty. Operand 4874 states and 15267 transitions. [2021-03-10 21:16:15,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:16:15,763 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:15,763 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:15,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable424 [2021-03-10 21:16:15,963 INFO L428 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:15,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:15,964 INFO L82 PathProgramCache]: Analyzing trace with hash -2044833439, now seen corresponding path program 244 times [2021-03-10 21:16:15,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:15,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760533329] [2021-03-10 21:16:15,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:15,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:16,015 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:16,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760533329] [2021-03-10 21:16:16,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549681024] [2021-03-10 21:16:16,016 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:16,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:16:16,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:16,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:16:16,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:16,148 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:16,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:16,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-03-10 21:16:16,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581899707] [2021-03-10 21:16:16,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:16:16,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:16,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:16:16,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:16:16,148 INFO L87 Difference]: Start difference. First operand 4874 states and 15267 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) [2021-03-10 21:16:16,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:16,918 INFO L93 Difference]: Finished difference Result 5619 states and 16921 transitions. [2021-03-10 21:16:16,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-03-10 21:16:16,919 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 22 [2021-03-10 21:16:16,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:16,925 INFO L225 Difference]: With dead ends: 5619 [2021-03-10 21:16:16,925 INFO L226 Difference]: Without dead ends: 5607 [2021-03-10 21:16:16,926 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1060 ImplicationChecksByTransitivity, 654.8ms TimeCoverageRelationStatistics Valid=1461, Invalid=2961, Unknown=0, NotChecked=0, Total=4422 [2021-03-10 21:16:16,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5607 states. [2021-03-10 21:16:16,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5607 to 4673. [2021-03-10 21:16:16,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4673 states, 4672 states have (on average 3.120291095890411) internal successors, (14578), 4672 states have internal predecessors, (14578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:16,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4673 states to 4673 states and 14578 transitions. [2021-03-10 21:16:16,985 INFO L78 Accepts]: Start accepts. Automaton has 4673 states and 14578 transitions. Word has length 22 [2021-03-10 21:16:16,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:16,985 INFO L480 AbstractCegarLoop]: Abstraction has 4673 states and 14578 transitions. [2021-03-10 21:16:16,985 INFO L481 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) [2021-03-10 21:16:16,985 INFO L276 IsEmpty]: Start isEmpty. Operand 4673 states and 14578 transitions. [2021-03-10 21:16:16,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:16:16,990 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:16,990 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:17,190 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable425,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:17,190 INFO L428 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:17,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:17,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1509603637, now seen corresponding path program 245 times [2021-03-10 21:16:17,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:17,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130637199] [2021-03-10 21:16:17,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:17,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:17,245 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:17,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130637199] [2021-03-10 21:16:17,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237270482] [2021-03-10 21:16:17,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:16:17,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:16:17,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:17,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:16:17,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:17,387 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:17,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:17,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-03-10 21:16:17,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081828481] [2021-03-10 21:16:17,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:16:17,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:17,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:16:17,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:16:17,388 INFO L87 Difference]: Start difference. First operand 4673 states and 14578 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) [2021-03-10 21:16:18,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:18,121 INFO L93 Difference]: Finished difference Result 5350 states and 16179 transitions. [2021-03-10 21:16:18,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-03-10 21:16:18,122 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 22 [2021-03-10 21:16:18,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:18,128 INFO L225 Difference]: With dead ends: 5350 [2021-03-10 21:16:18,128 INFO L226 Difference]: Without dead ends: 5338 [2021-03-10 21:16:18,128 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 615.5ms TimeCoverageRelationStatistics Valid=1464, Invalid=3092, Unknown=0, NotChecked=0, Total=4556 [2021-03-10 21:16:18,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5338 states. [2021-03-10 21:16:18,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5338 to 4703. [2021-03-10 21:16:18,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4703 states, 4702 states have (on average 3.1207996597192684) internal successors, (14674), 4702 states have internal predecessors, (14674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:18,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4703 states to 4703 states and 14674 transitions. [2021-03-10 21:16:18,205 INFO L78 Accepts]: Start accepts. Automaton has 4703 states and 14674 transitions. Word has length 22 [2021-03-10 21:16:18,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:18,205 INFO L480 AbstractCegarLoop]: Abstraction has 4703 states and 14674 transitions. [2021-03-10 21:16:18,205 INFO L481 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) [2021-03-10 21:16:18,205 INFO L276 IsEmpty]: Start isEmpty. Operand 4703 states and 14674 transitions. [2021-03-10 21:16:18,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:16:18,210 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:18,211 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:18,411 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2021-03-10 21:16:18,411 INFO L428 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:18,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:18,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1427351127, now seen corresponding path program 246 times [2021-03-10 21:16:18,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:18,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492459171] [2021-03-10 21:16:18,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:18,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:18,471 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:18,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492459171] [2021-03-10 21:16:18,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418707153] [2021-03-10 21:16:18,471 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:18,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:16:18,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:18,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:16:18,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:18,615 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:18,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:18,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-03-10 21:16:18,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857011986] [2021-03-10 21:16:18,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:16:18,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:18,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:16:18,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:16:18,616 INFO L87 Difference]: Start difference. First operand 4703 states and 14674 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 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) [2021-03-10 21:16:19,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:19,170 INFO L93 Difference]: Finished difference Result 5100 states and 15587 transitions. [2021-03-10 21:16:19,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 21:16:19,170 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 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 22 [2021-03-10 21:16:19,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:19,176 INFO L225 Difference]: With dead ends: 5100 [2021-03-10 21:16:19,177 INFO L226 Difference]: Without dead ends: 5100 [2021-03-10 21:16:19,177 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 502.0ms TimeCoverageRelationStatistics Valid=907, Invalid=2063, Unknown=0, NotChecked=0, Total=2970 [2021-03-10 21:16:19,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5100 states. [2021-03-10 21:16:19,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5100 to 4687. [2021-03-10 21:16:19,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4687 states, 4686 states have (on average 3.120998719590269) internal successors, (14625), 4686 states have internal predecessors, (14625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:19,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4687 states to 4687 states and 14625 transitions. [2021-03-10 21:16:19,232 INFO L78 Accepts]: Start accepts. Automaton has 4687 states and 14625 transitions. Word has length 22 [2021-03-10 21:16:19,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:19,232 INFO L480 AbstractCegarLoop]: Abstraction has 4687 states and 14625 transitions. [2021-03-10 21:16:19,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 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) [2021-03-10 21:16:19,232 INFO L276 IsEmpty]: Start isEmpty. Operand 4687 states and 14625 transitions. [2021-03-10 21:16:19,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:16:19,237 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:19,237 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:19,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable427 [2021-03-10 21:16:19,438 INFO L428 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:19,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:19,438 INFO L82 PathProgramCache]: Analyzing trace with hash 208442063, now seen corresponding path program 247 times [2021-03-10 21:16:19,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:19,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996568499] [2021-03-10 21:16:19,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:19,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:19,502 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:19,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996568499] [2021-03-10 21:16:19,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080912023] [2021-03-10 21:16:19,503 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:19,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:19,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:16:19,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:19,642 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:19,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:19,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-03-10 21:16:19,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972515171] [2021-03-10 21:16:19,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:16:19,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:19,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:16:19,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:16:19,643 INFO L87 Difference]: Start difference. First operand 4687 states and 14625 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) [2021-03-10 21:16:20,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:20,172 INFO L93 Difference]: Finished difference Result 5184 states and 15752 transitions. [2021-03-10 21:16:20,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 21:16:20,173 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 22 [2021-03-10 21:16:20,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:20,179 INFO L225 Difference]: With dead ends: 5184 [2021-03-10 21:16:20,179 INFO L226 Difference]: Without dead ends: 5174 [2021-03-10 21:16:20,180 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 461.8ms TimeCoverageRelationStatistics Valid=713, Invalid=1639, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 21:16:20,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5174 states. [2021-03-10 21:16:20,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5174 to 4685. [2021-03-10 21:16:20,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4685 states, 4684 states have (on average 3.1195559350982065) internal successors, (14612), 4684 states have internal predecessors, (14612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:20,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4685 states to 4685 states and 14612 transitions. [2021-03-10 21:16:20,248 INFO L78 Accepts]: Start accepts. Automaton has 4685 states and 14612 transitions. Word has length 22 [2021-03-10 21:16:20,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:20,248 INFO L480 AbstractCegarLoop]: Abstraction has 4685 states and 14612 transitions. [2021-03-10 21:16:20,248 INFO L481 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) [2021-03-10 21:16:20,248 INFO L276 IsEmpty]: Start isEmpty. Operand 4685 states and 14612 transitions. [2021-03-10 21:16:20,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:16:20,253 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:20,253 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:20,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:20,454 INFO L428 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:20,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:20,454 INFO L82 PathProgramCache]: Analyzing trace with hash -662161577, now seen corresponding path program 248 times [2021-03-10 21:16:20,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:20,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640186098] [2021-03-10 21:16:20,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:20,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:20,498 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:20,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640186098] [2021-03-10 21:16:20,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448971403] [2021-03-10 21:16:20,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:20,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:16:20,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:20,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:16:20,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:20,625 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:20,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:20,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-03-10 21:16:20,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654295651] [2021-03-10 21:16:20,626 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:16:20,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:20,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:16:20,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:16:20,626 INFO L87 Difference]: Start difference. First operand 4685 states and 14612 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:21,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:21,183 INFO L93 Difference]: Finished difference Result 5658 states and 17075 transitions. [2021-03-10 21:16:21,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 21:16:21,184 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:16:21,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:21,190 INFO L225 Difference]: With dead ends: 5658 [2021-03-10 21:16:21,190 INFO L226 Difference]: Without dead ends: 5652 [2021-03-10 21:16:21,190 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 435.2ms TimeCoverageRelationStatistics Valid=760, Invalid=1592, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 21:16:21,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5652 states. [2021-03-10 21:16:21,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5652 to 4809. [2021-03-10 21:16:21,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4809 states, 4808 states have (on average 3.117512479201331) internal successors, (14989), 4808 states have internal predecessors, (14989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:21,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4809 states to 4809 states and 14989 transitions. [2021-03-10 21:16:21,242 INFO L78 Accepts]: Start accepts. Automaton has 4809 states and 14989 transitions. Word has length 22 [2021-03-10 21:16:21,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:21,242 INFO L480 AbstractCegarLoop]: Abstraction has 4809 states and 14989 transitions. [2021-03-10 21:16:21,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:21,242 INFO L276 IsEmpty]: Start isEmpty. Operand 4809 states and 14989 transitions. [2021-03-10 21:16:21,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:16:21,247 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:21,247 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:21,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable429 [2021-03-10 21:16:21,447 INFO L428 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:21,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:21,447 INFO L82 PathProgramCache]: Analyzing trace with hash -274603569, now seen corresponding path program 249 times [2021-03-10 21:16:21,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:21,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112872073] [2021-03-10 21:16:21,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:21,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:21,493 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:21,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112872073] [2021-03-10 21:16:21,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43170685] [2021-03-10 21:16:21,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:21,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:16:21,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:21,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:16:21,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:21,629 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:21,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:21,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-03-10 21:16:21,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242679558] [2021-03-10 21:16:21,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:16:21,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:21,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:16:21,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:16:21,630 INFO L87 Difference]: Start difference. First operand 4809 states and 14989 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:22,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:22,214 INFO L93 Difference]: Finished difference Result 5753 states and 17358 transitions. [2021-03-10 21:16:22,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 21:16:22,215 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:16:22,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:22,222 INFO L225 Difference]: With dead ends: 5753 [2021-03-10 21:16:22,222 INFO L226 Difference]: Without dead ends: 5749 [2021-03-10 21:16:22,222 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 469.3ms TimeCoverageRelationStatistics Valid=805, Invalid=1547, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 21:16:22,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5749 states. [2021-03-10 21:16:22,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5749 to 4843. [2021-03-10 21:16:22,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4843 states, 4842 states have (on average 3.117513424204874) internal successors, (15095), 4842 states have internal predecessors, (15095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:22,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4843 states to 4843 states and 15095 transitions. [2021-03-10 21:16:22,288 INFO L78 Accepts]: Start accepts. Automaton has 4843 states and 15095 transitions. Word has length 22 [2021-03-10 21:16:22,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:22,288 INFO L480 AbstractCegarLoop]: Abstraction has 4843 states and 15095 transitions. [2021-03-10 21:16:22,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:22,289 INFO L276 IsEmpty]: Start isEmpty. Operand 4843 states and 15095 transitions. [2021-03-10 21:16:22,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:16:22,294 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:22,294 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:22,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-03-10 21:16:22,495 INFO L428 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:22,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:22,495 INFO L82 PathProgramCache]: Analyzing trace with hash 569182295, now seen corresponding path program 250 times [2021-03-10 21:16:22,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:22,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82270919] [2021-03-10 21:16:22,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:22,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:22,548 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:22,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82270919] [2021-03-10 21:16:22,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856162686] [2021-03-10 21:16:22,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:22,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:16:22,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:22,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:16:22,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:22,678 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:22,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:22,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-03-10 21:16:22,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351001301] [2021-03-10 21:16:22,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:16:22,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:22,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:16:22,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:16:22,679 INFO L87 Difference]: Start difference. First operand 4843 states and 15095 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:23,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:23,316 INFO L93 Difference]: Finished difference Result 6063 states and 18166 transitions. [2021-03-10 21:16:23,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-03-10 21:16:23,316 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:16:23,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:23,323 INFO L225 Difference]: With dead ends: 6063 [2021-03-10 21:16:23,323 INFO L226 Difference]: Without dead ends: 6063 [2021-03-10 21:16:23,323 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 519.0ms TimeCoverageRelationStatistics Valid=1038, Invalid=1824, Unknown=0, NotChecked=0, Total=2862 [2021-03-10 21:16:23,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6063 states. [2021-03-10 21:16:23,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6063 to 4876. [2021-03-10 21:16:23,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4876 states, 4875 states have (on average 3.125948717948718) internal successors, (15239), 4875 states have internal predecessors, (15239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:23,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4876 states to 4876 states and 15239 transitions. [2021-03-10 21:16:23,394 INFO L78 Accepts]: Start accepts. Automaton has 4876 states and 15239 transitions. Word has length 22 [2021-03-10 21:16:23,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:23,394 INFO L480 AbstractCegarLoop]: Abstraction has 4876 states and 15239 transitions. [2021-03-10 21:16:23,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:23,394 INFO L276 IsEmpty]: Start isEmpty. Operand 4876 states and 15239 transitions. [2021-03-10 21:16:23,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:16:23,398 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:23,398 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:23,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable431,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:23,599 INFO L428 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:23,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:23,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1140637101, now seen corresponding path program 251 times [2021-03-10 21:16:23,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:23,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96193963] [2021-03-10 21:16:23,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:23,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:23,645 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:23,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96193963] [2021-03-10 21:16:23,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24832088] [2021-03-10 21:16:23,645 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:23,665 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:16:23,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:23,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:16:23,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:23,783 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:23,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:23,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-03-10 21:16:23,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439819797] [2021-03-10 21:16:23,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:16:23,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:23,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:16:23,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:16:23,784 INFO L87 Difference]: Start difference. First operand 4876 states and 15239 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:24,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:24,579 INFO L93 Difference]: Finished difference Result 5817 states and 17445 transitions. [2021-03-10 21:16:24,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-03-10 21:16:24,580 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:16:24,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:24,587 INFO L225 Difference]: With dead ends: 5817 [2021-03-10 21:16:24,587 INFO L226 Difference]: Without dead ends: 5808 [2021-03-10 21:16:24,588 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1246 ImplicationChecksByTransitivity, 685.5ms TimeCoverageRelationStatistics Valid=1537, Invalid=3293, Unknown=0, NotChecked=0, Total=4830 [2021-03-10 21:16:24,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5808 states. [2021-03-10 21:16:24,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5808 to 4799. [2021-03-10 21:16:24,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4799 states, 4798 states have (on average 3.1192163401417257) internal successors, (14966), 4798 states have internal predecessors, (14966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:24,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4799 states to 4799 states and 14966 transitions. [2021-03-10 21:16:24,643 INFO L78 Accepts]: Start accepts. Automaton has 4799 states and 14966 transitions. Word has length 22 [2021-03-10 21:16:24,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:24,644 INFO L480 AbstractCegarLoop]: Abstraction has 4799 states and 14966 transitions. [2021-03-10 21:16:24,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:24,644 INFO L276 IsEmpty]: Start isEmpty. Operand 4799 states and 14966 transitions. [2021-03-10 21:16:24,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:16:24,648 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:24,648 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:24,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-03-10 21:16:24,848 INFO L428 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:24,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:24,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1675866903, now seen corresponding path program 252 times [2021-03-10 21:16:24,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:24,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141392447] [2021-03-10 21:16:24,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:24,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:24,903 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:24,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141392447] [2021-03-10 21:16:24,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506927300] [2021-03-10 21:16:24,903 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:24,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:16:24,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:24,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:16:24,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:25,051 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:25,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:25,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-03-10 21:16:25,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984913163] [2021-03-10 21:16:25,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:16:25,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:25,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:16:25,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:16:25,052 INFO L87 Difference]: Start difference. First operand 4799 states and 14966 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) [2021-03-10 21:16:25,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:25,813 INFO L93 Difference]: Finished difference Result 5773 states and 17293 transitions. [2021-03-10 21:16:25,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-03-10 21:16:25,814 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 22 [2021-03-10 21:16:25,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:25,821 INFO L225 Difference]: With dead ends: 5773 [2021-03-10 21:16:25,821 INFO L226 Difference]: Without dead ends: 5755 [2021-03-10 21:16:25,821 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 668.7ms TimeCoverageRelationStatistics Valid=1436, Invalid=3256, Unknown=0, NotChecked=0, Total=4692 [2021-03-10 21:16:25,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5755 states. [2021-03-10 21:16:25,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5755 to 4708. [2021-03-10 21:16:25,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4708 states, 4707 states have (on average 3.11897174421075) internal successors, (14681), 4707 states have internal predecessors, (14681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:25,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4708 states to 4708 states and 14681 transitions. [2021-03-10 21:16:25,878 INFO L78 Accepts]: Start accepts. Automaton has 4708 states and 14681 transitions. Word has length 22 [2021-03-10 21:16:25,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:25,879 INFO L480 AbstractCegarLoop]: Abstraction has 4708 states and 14681 transitions. [2021-03-10 21:16:25,879 INFO L481 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) [2021-03-10 21:16:25,879 INFO L276 IsEmpty]: Start isEmpty. Operand 4708 states and 14681 transitions. [2021-03-10 21:16:25,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:16:25,883 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:25,883 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:26,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-03-10 21:16:26,084 INFO L428 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:26,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:26,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1088121581, now seen corresponding path program 253 times [2021-03-10 21:16:26,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:26,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223988748] [2021-03-10 21:16:26,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:26,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:26,140 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:26,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223988748] [2021-03-10 21:16:26,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826709392] [2021-03-10 21:16:26,140 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:26,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:26,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:16:26,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:26,290 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:26,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:26,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-03-10 21:16:26,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670728187] [2021-03-10 21:16:26,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:16:26,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:26,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:16:26,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:16:26,290 INFO L87 Difference]: Start difference. First operand 4708 states and 14681 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 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) [2021-03-10 21:16:26,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:26,977 INFO L93 Difference]: Finished difference Result 5582 states and 16822 transitions. [2021-03-10 21:16:26,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-03-10 21:16:26,978 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 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 22 [2021-03-10 21:16:26,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:26,985 INFO L225 Difference]: With dead ends: 5582 [2021-03-10 21:16:26,985 INFO L226 Difference]: Without dead ends: 5564 [2021-03-10 21:16:26,986 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 614.8ms TimeCoverageRelationStatistics Valid=1406, Invalid=3286, Unknown=0, NotChecked=0, Total=4692 [2021-03-10 21:16:26,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5564 states. [2021-03-10 21:16:27,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5564 to 4728. [2021-03-10 21:16:27,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4728 states, 4727 states have (on average 3.119737677173683) internal successors, (14747), 4727 states have internal predecessors, (14747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:27,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4728 states to 4728 states and 14747 transitions. [2021-03-10 21:16:27,056 INFO L78 Accepts]: Start accepts. Automaton has 4728 states and 14747 transitions. Word has length 22 [2021-03-10 21:16:27,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:27,056 INFO L480 AbstractCegarLoop]: Abstraction has 4728 states and 14747 transitions. [2021-03-10 21:16:27,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 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) [2021-03-10 21:16:27,056 INFO L276 IsEmpty]: Start isEmpty. Operand 4728 states and 14747 transitions. [2021-03-10 21:16:27,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:16:27,061 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:27,061 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:27,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable434 [2021-03-10 21:16:27,263 INFO L428 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:27,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:27,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1165777525, now seen corresponding path program 254 times [2021-03-10 21:16:27,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:27,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719003610] [2021-03-10 21:16:27,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:27,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:27,324 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:27,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719003610] [2021-03-10 21:16:27,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192378148] [2021-03-10 21:16:27,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:27,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:16:27,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:27,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:16:27,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:27,485 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:27,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:27,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-03-10 21:16:27,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815742077] [2021-03-10 21:16:27,485 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:16:27,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:27,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:16:27,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:16:27,485 INFO L87 Difference]: Start difference. First operand 4728 states and 14747 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:28,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:28,145 INFO L93 Difference]: Finished difference Result 5063 states and 15470 transitions. [2021-03-10 21:16:28,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 21:16:28,145 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:16:28,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:28,152 INFO L225 Difference]: With dead ends: 5063 [2021-03-10 21:16:28,152 INFO L226 Difference]: Without dead ends: 5063 [2021-03-10 21:16:28,152 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 577.2ms TimeCoverageRelationStatistics Valid=1006, Invalid=2416, Unknown=0, NotChecked=0, Total=3422 [2021-03-10 21:16:28,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5063 states. [2021-03-10 21:16:28,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5063 to 4692. [2021-03-10 21:16:28,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4692 states, 4691 states have (on average 3.118311660626732) internal successors, (14628), 4691 states have internal predecessors, (14628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:28,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4692 states to 4692 states and 14628 transitions. [2021-03-10 21:16:28,205 INFO L78 Accepts]: Start accepts. Automaton has 4692 states and 14628 transitions. Word has length 22 [2021-03-10 21:16:28,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:28,205 INFO L480 AbstractCegarLoop]: Abstraction has 4692 states and 14628 transitions. [2021-03-10 21:16:28,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:28,206 INFO L276 IsEmpty]: Start isEmpty. Operand 4692 states and 14628 transitions. [2021-03-10 21:16:28,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:16:28,210 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:28,210 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:28,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2021-03-10 21:16:28,411 INFO L428 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:28,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:28,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1392690059, now seen corresponding path program 255 times [2021-03-10 21:16:28,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:28,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676749023] [2021-03-10 21:16:28,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:28,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:28,463 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:28,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676749023] [2021-03-10 21:16:28,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130201225] [2021-03-10 21:16:28,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:28,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:16:28,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:28,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:16:28,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:28,618 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:28,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:28,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-03-10 21:16:28,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606854817] [2021-03-10 21:16:28,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:16:28,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:28,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:16:28,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:16:28,619 INFO L87 Difference]: Start difference. First operand 4692 states and 14628 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) [2021-03-10 21:16:29,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:29,229 INFO L93 Difference]: Finished difference Result 5220 states and 15784 transitions. [2021-03-10 21:16:29,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 21:16:29,230 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 22 [2021-03-10 21:16:29,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:29,237 INFO L225 Difference]: With dead ends: 5220 [2021-03-10 21:16:29,237 INFO L226 Difference]: Without dead ends: 5210 [2021-03-10 21:16:29,237 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 516.5ms TimeCoverageRelationStatistics Valid=809, Invalid=1947, Unknown=0, NotChecked=0, Total=2756 [2021-03-10 21:16:29,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5210 states. [2021-03-10 21:16:29,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5210 to 4589. [2021-03-10 21:16:29,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4589 states, 4588 states have (on average 3.1200959023539667) internal successors, (14315), 4588 states have internal predecessors, (14315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:29,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4589 states to 4589 states and 14315 transitions. [2021-03-10 21:16:29,293 INFO L78 Accepts]: Start accepts. Automaton has 4589 states and 14315 transitions. Word has length 22 [2021-03-10 21:16:29,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:29,293 INFO L480 AbstractCegarLoop]: Abstraction has 4589 states and 14315 transitions. [2021-03-10 21:16:29,293 INFO L481 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) [2021-03-10 21:16:29,293 INFO L276 IsEmpty]: Start isEmpty. Operand 4589 states and 14315 transitions. [2021-03-10 21:16:29,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:16:29,298 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:29,298 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:29,498 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2021-03-10 21:16:29,499 INFO L428 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:29,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:29,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1059579275, now seen corresponding path program 256 times [2021-03-10 21:16:29,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:29,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097875206] [2021-03-10 21:16:29,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:29,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:29,544 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:29,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097875206] [2021-03-10 21:16:29,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693039862] [2021-03-10 21:16:29,544 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:29,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:16:29,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:29,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:16:29,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:29,698 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:29,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:29,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-03-10 21:16:29,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663619612] [2021-03-10 21:16:29,698 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:16:29,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:29,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:16:29,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:16:29,699 INFO L87 Difference]: Start difference. First operand 4589 states and 14315 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:30,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:30,314 INFO L93 Difference]: Finished difference Result 5724 states and 17179 transitions. [2021-03-10 21:16:30,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 21:16:30,315 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:16:30,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:30,322 INFO L225 Difference]: With dead ends: 5724 [2021-03-10 21:16:30,322 INFO L226 Difference]: Without dead ends: 5718 [2021-03-10 21:16:30,322 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 487.3ms TimeCoverageRelationStatistics Valid=801, Invalid=1749, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 21:16:30,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5718 states. [2021-03-10 21:16:30,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5718 to 4609. [2021-03-10 21:16:30,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4609 states, 4608 states have (on average 3.118923611111111) internal successors, (14372), 4608 states have internal predecessors, (14372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:30,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4609 states to 4609 states and 14372 transitions. [2021-03-10 21:16:30,381 INFO L78 Accepts]: Start accepts. Automaton has 4609 states and 14372 transitions. Word has length 22 [2021-03-10 21:16:30,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:30,381 INFO L480 AbstractCegarLoop]: Abstraction has 4609 states and 14372 transitions. [2021-03-10 21:16:30,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:30,382 INFO L276 IsEmpty]: Start isEmpty. Operand 4609 states and 14372 transitions. [2021-03-10 21:16:30,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:16:30,386 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:30,386 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:30,587 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable437,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:30,587 INFO L428 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:30,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:30,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1999207541, now seen corresponding path program 257 times [2021-03-10 21:16:30,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:30,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330278107] [2021-03-10 21:16:30,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:30,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:30,629 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:30,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330278107] [2021-03-10 21:16:30,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121518458] [2021-03-10 21:16:30,629 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:30,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:16:30,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:30,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:16:30,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:30,788 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:30,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:30,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-03-10 21:16:30,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573613685] [2021-03-10 21:16:30,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:16:30,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:30,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:16:30,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:16:30,789 INFO L87 Difference]: Start difference. First operand 4609 states and 14372 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:31,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:31,390 INFO L93 Difference]: Finished difference Result 6302 states and 18942 transitions. [2021-03-10 21:16:31,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 21:16:31,399 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:16:31,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:31,408 INFO L225 Difference]: With dead ends: 6302 [2021-03-10 21:16:31,408 INFO L226 Difference]: Without dead ends: 6300 [2021-03-10 21:16:31,408 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 506.3ms TimeCoverageRelationStatistics Valid=834, Invalid=1616, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 21:16:31,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6300 states. [2021-03-10 21:16:31,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6300 to 4905. [2021-03-10 21:16:31,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4905 states, 4904 states have (on average 3.1176590538336053) internal successors, (15289), 4904 states have internal predecessors, (15289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:31,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4905 states to 4905 states and 15289 transitions. [2021-03-10 21:16:31,475 INFO L78 Accepts]: Start accepts. Automaton has 4905 states and 15289 transitions. Word has length 22 [2021-03-10 21:16:31,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:31,475 INFO L480 AbstractCegarLoop]: Abstraction has 4905 states and 15289 transitions. [2021-03-10 21:16:31,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:31,475 INFO L276 IsEmpty]: Start isEmpty. Operand 4905 states and 15289 transitions. [2021-03-10 21:16:31,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:16:31,480 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:31,480 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:31,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:31,681 INFO L428 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:31,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:31,681 INFO L82 PathProgramCache]: Analyzing trace with hash 534521227, now seen corresponding path program 258 times [2021-03-10 21:16:31,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:31,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463714492] [2021-03-10 21:16:31,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:31,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:31,719 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:31,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463714492] [2021-03-10 21:16:31,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875560014] [2021-03-10 21:16:31,719 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:31,738 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:16:31,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:31,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:16:31,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:31,868 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:31,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:31,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-03-10 21:16:31,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307884294] [2021-03-10 21:16:31,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:16:31,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:31,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:16:31,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:16:31,869 INFO L87 Difference]: Start difference. First operand 4905 states and 15289 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:32,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:32,475 INFO L93 Difference]: Finished difference Result 6307 states and 18845 transitions. [2021-03-10 21:16:32,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 21:16:32,476 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:16:32,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:32,483 INFO L225 Difference]: With dead ends: 6307 [2021-03-10 21:16:32,483 INFO L226 Difference]: Without dead ends: 6307 [2021-03-10 21:16:32,483 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 511.7ms TimeCoverageRelationStatistics Valid=966, Invalid=1686, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 21:16:32,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6307 states. [2021-03-10 21:16:32,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6307 to 5098. [2021-03-10 21:16:32,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5098 states, 5097 states have (on average 3.1271336080047085) internal successors, (15939), 5097 states have internal predecessors, (15939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:32,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5098 states to 5098 states and 15939 transitions. [2021-03-10 21:16:32,580 INFO L78 Accepts]: Start accepts. Automaton has 5098 states and 15939 transitions. Word has length 22 [2021-03-10 21:16:32,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:32,580 INFO L480 AbstractCegarLoop]: Abstraction has 5098 states and 15939 transitions. [2021-03-10 21:16:32,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:32,580 INFO L276 IsEmpty]: Start isEmpty. Operand 5098 states and 15939 transitions. [2021-03-10 21:16:32,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:16:32,588 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:32,588 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:32,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:32,789 INFO L428 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:32,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:32,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1105976033, now seen corresponding path program 259 times [2021-03-10 21:16:32,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:32,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009388665] [2021-03-10 21:16:32,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:32,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:32,831 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:32,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009388665] [2021-03-10 21:16:32,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126232697] [2021-03-10 21:16:32,832 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:32,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:32,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:16:32,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:32,996 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:32,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:32,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-03-10 21:16:32,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44981666] [2021-03-10 21:16:32,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:16:32,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:32,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:16:32,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:16:32,997 INFO L87 Difference]: Start difference. First operand 5098 states and 15939 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:33,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:33,897 INFO L93 Difference]: Finished difference Result 6203 states and 18588 transitions. [2021-03-10 21:16:33,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-03-10 21:16:33,898 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:16:33,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:33,905 INFO L225 Difference]: With dead ends: 6203 [2021-03-10 21:16:33,905 INFO L226 Difference]: Without dead ends: 6194 [2021-03-10 21:16:33,905 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 798.2ms TimeCoverageRelationStatistics Valid=1706, Invalid=3844, Unknown=0, NotChecked=0, Total=5550 [2021-03-10 21:16:33,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6194 states. [2021-03-10 21:16:33,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6194 to 5023. [2021-03-10 21:16:33,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5023 states, 5022 states have (on average 3.122859418558343) internal successors, (15683), 5022 states have internal predecessors, (15683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:33,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5023 states to 5023 states and 15683 transitions. [2021-03-10 21:16:33,966 INFO L78 Accepts]: Start accepts. Automaton has 5023 states and 15683 transitions. Word has length 22 [2021-03-10 21:16:33,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:33,966 INFO L480 AbstractCegarLoop]: Abstraction has 5023 states and 15683 transitions. [2021-03-10 21:16:33,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:33,967 INFO L276 IsEmpty]: Start isEmpty. Operand 5023 states and 15683 transitions. [2021-03-10 21:16:33,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:16:33,972 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:33,972 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:34,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:34,172 INFO L428 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:34,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:34,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1641205835, now seen corresponding path program 260 times [2021-03-10 21:16:34,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:34,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447604409] [2021-03-10 21:16:34,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:34,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:34,222 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:34,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447604409] [2021-03-10 21:16:34,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629067687] [2021-03-10 21:16:34,222 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 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 [2021-03-10 21:16:34,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:16:34,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:34,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:16:34,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:34,393 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:34,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:34,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-03-10 21:16:34,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550645088] [2021-03-10 21:16:34,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:16:34,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:34,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:16:34,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:16:34,394 INFO L87 Difference]: Start difference. First operand 5023 states and 15683 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:35,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:35,282 INFO L93 Difference]: Finished difference Result 6188 states and 18528 transitions. [2021-03-10 21:16:35,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-03-10 21:16:35,283 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:16:35,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:35,289 INFO L225 Difference]: With dead ends: 6188 [2021-03-10 21:16:35,290 INFO L226 Difference]: Without dead ends: 6176 [2021-03-10 21:16:35,290 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1459 ImplicationChecksByTransitivity, 794.4ms TimeCoverageRelationStatistics Valid=1503, Invalid=3609, Unknown=0, NotChecked=0, Total=5112 [2021-03-10 21:16:35,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6176 states. [2021-03-10 21:16:35,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6176 to 5007. [2021-03-10 21:16:35,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5007 states, 5006 states have (on average 3.1220535357570913) internal successors, (15629), 5006 states have internal predecessors, (15629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:35,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5007 states to 5007 states and 15629 transitions. [2021-03-10 21:16:35,348 INFO L78 Accepts]: Start accepts. Automaton has 5007 states and 15629 transitions. Word has length 22 [2021-03-10 21:16:35,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:35,349 INFO L480 AbstractCegarLoop]: Abstraction has 5007 states and 15629 transitions. [2021-03-10 21:16:35,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:35,349 INFO L276 IsEmpty]: Start isEmpty. Operand 5007 states and 15629 transitions. [2021-03-10 21:16:35,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:16:35,353 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:35,353 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:35,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-03-10 21:16:35,554 INFO L428 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:35,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:35,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1053460513, now seen corresponding path program 261 times [2021-03-10 21:16:35,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:35,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960085425] [2021-03-10 21:16:35,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:35,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:35,609 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:35,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960085425] [2021-03-10 21:16:35,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339163582] [2021-03-10 21:16:35,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:35,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:16:35,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:35,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:16:35,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:35,773 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:35,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:35,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-03-10 21:16:35,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816549527] [2021-03-10 21:16:35,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:16:35,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:35,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:16:35,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:16:35,774 INFO L87 Difference]: Start difference. First operand 5007 states and 15629 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) [2021-03-10 21:16:36,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:36,591 INFO L93 Difference]: Finished difference Result 6237 states and 18671 transitions. [2021-03-10 21:16:36,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-03-10 21:16:36,592 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 22 [2021-03-10 21:16:36,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:36,599 INFO L225 Difference]: With dead ends: 6237 [2021-03-10 21:16:36,599 INFO L226 Difference]: Without dead ends: 6219 [2021-03-10 21:16:36,599 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1391 ImplicationChecksByTransitivity, 731.2ms TimeCoverageRelationStatistics Valid=1373, Invalid=3457, Unknown=0, NotChecked=0, Total=4830 [2021-03-10 21:16:36,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6219 states. [2021-03-10 21:16:36,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6219 to 5025. [2021-03-10 21:16:36,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5025 states, 5024 states have (on average 3.1240047770700636) internal successors, (15695), 5024 states have internal predecessors, (15695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:36,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5025 states to 5025 states and 15695 transitions. [2021-03-10 21:16:36,673 INFO L78 Accepts]: Start accepts. Automaton has 5025 states and 15695 transitions. Word has length 22 [2021-03-10 21:16:36,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:36,673 INFO L480 AbstractCegarLoop]: Abstraction has 5025 states and 15695 transitions. [2021-03-10 21:16:36,673 INFO L481 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) [2021-03-10 21:16:36,673 INFO L276 IsEmpty]: Start isEmpty. Operand 5025 states and 15695 transitions. [2021-03-10 21:16:36,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:16:36,677 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:36,677 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:36,878 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-03-10 21:16:36,878 INFO L428 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:36,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:36,878 INFO L82 PathProgramCache]: Analyzing trace with hash 13224715, now seen corresponding path program 262 times [2021-03-10 21:16:36,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:36,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362874869] [2021-03-10 21:16:36,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:36,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:36,946 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:36,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362874869] [2021-03-10 21:16:36,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90580635] [2021-03-10 21:16:36,946 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:36,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:16:36,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:36,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:16:36,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:37,131 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:37,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:37,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-03-10 21:16:37,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854607330] [2021-03-10 21:16:37,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:16:37,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:37,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:16:37,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:16:37,132 INFO L87 Difference]: Start difference. First operand 5025 states and 15695 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:37,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:37,831 INFO L93 Difference]: Finished difference Result 6089 states and 18341 transitions. [2021-03-10 21:16:37,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-03-10 21:16:37,832 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:16:37,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:37,839 INFO L225 Difference]: With dead ends: 6089 [2021-03-10 21:16:37,839 INFO L226 Difference]: Without dead ends: 6065 [2021-03-10 21:16:37,840 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1322 ImplicationChecksByTransitivity, 679.2ms TimeCoverageRelationStatistics Valid=1314, Invalid=3378, Unknown=0, NotChecked=0, Total=4692 [2021-03-10 21:16:37,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6065 states. [2021-03-10 21:16:37,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6065 to 5048. [2021-03-10 21:16:37,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5048 states, 5047 states have (on average 3.125619179710719) internal successors, (15775), 5047 states have internal predecessors, (15775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:37,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5048 states to 5048 states and 15775 transitions. [2021-03-10 21:16:37,909 INFO L78 Accepts]: Start accepts. Automaton has 5048 states and 15775 transitions. Word has length 22 [2021-03-10 21:16:37,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:37,909 INFO L480 AbstractCegarLoop]: Abstraction has 5048 states and 15775 transitions. [2021-03-10 21:16:37,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:37,909 INFO L276 IsEmpty]: Start isEmpty. Operand 5048 states and 15775 transitions. [2021-03-10 21:16:37,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:16:37,914 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:37,914 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:38,115 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-03-10 21:16:38,115 INFO L428 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:38,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:38,115 INFO L82 PathProgramCache]: Analyzing trace with hash 51612887, now seen corresponding path program 263 times [2021-03-10 21:16:38,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:38,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428863991] [2021-03-10 21:16:38,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:38,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:38,181 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:38,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428863991] [2021-03-10 21:16:38,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842352432] [2021-03-10 21:16:38,181 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:38,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:16:38,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:38,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:16:38,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:38,353 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:38,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:38,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-03-10 21:16:38,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482745055] [2021-03-10 21:16:38,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:16:38,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:38,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:16:38,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:16:38,354 INFO L87 Difference]: Start difference. First operand 5048 states and 15775 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 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) [2021-03-10 21:16:39,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:39,108 INFO L93 Difference]: Finished difference Result 5685 states and 17310 transitions. [2021-03-10 21:16:39,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 21:16:39,108 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 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 22 [2021-03-10 21:16:39,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:39,114 INFO L225 Difference]: With dead ends: 5685 [2021-03-10 21:16:39,114 INFO L226 Difference]: Without dead ends: 5685 [2021-03-10 21:16:39,115 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 683.6ms TimeCoverageRelationStatistics Valid=1082, Invalid=2700, Unknown=0, NotChecked=0, Total=3782 [2021-03-10 21:16:39,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5685 states. [2021-03-10 21:16:39,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5685 to 5099. [2021-03-10 21:16:39,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5099 states, 5098 states have (on average 3.1196547665751275) internal successors, (15904), 5098 states have internal predecessors, (15904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:39,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5099 states to 5099 states and 15904 transitions. [2021-03-10 21:16:39,169 INFO L78 Accepts]: Start accepts. Automaton has 5099 states and 15904 transitions. Word has length 22 [2021-03-10 21:16:39,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:39,169 INFO L480 AbstractCegarLoop]: Abstraction has 5099 states and 15904 transitions. [2021-03-10 21:16:39,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 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) [2021-03-10 21:16:39,169 INFO L276 IsEmpty]: Start isEmpty. Operand 5099 states and 15904 transitions. [2021-03-10 21:16:39,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:16:39,174 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:39,174 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:39,374 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-03-10 21:16:39,374 INFO L428 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:39,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:39,374 INFO L82 PathProgramCache]: Analyzing trace with hash -550327729, now seen corresponding path program 264 times [2021-03-10 21:16:39,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:39,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571746548] [2021-03-10 21:16:39,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:39,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:39,439 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:39,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571746548] [2021-03-10 21:16:39,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297403650] [2021-03-10 21:16:39,440 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:16:39,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:16:39,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:39,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:16:39,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:39,613 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:39,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:39,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-03-10 21:16:39,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950034470] [2021-03-10 21:16:39,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:16:39,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:39,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:16:39,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:16:39,614 INFO L87 Difference]: Start difference. First operand 5099 states and 15904 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) [2021-03-10 21:16:40,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:40,283 INFO L93 Difference]: Finished difference Result 6196 states and 18689 transitions. [2021-03-10 21:16:40,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 21:16:40,284 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 22 [2021-03-10 21:16:40,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:40,292 INFO L225 Difference]: With dead ends: 6196 [2021-03-10 21:16:40,292 INFO L226 Difference]: Without dead ends: 6196 [2021-03-10 21:16:40,292 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 580.8ms TimeCoverageRelationStatistics Valid=846, Invalid=2124, Unknown=0, NotChecked=0, Total=2970 [2021-03-10 21:16:40,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6196 states. [2021-03-10 21:16:40,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6196 to 5243. [2021-03-10 21:16:40,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5243 states, 5242 states have (on average 3.119420068676078) internal successors, (16352), 5242 states have internal predecessors, (16352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:40,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5243 states to 5243 states and 16352 transitions. [2021-03-10 21:16:40,361 INFO L78 Accepts]: Start accepts. Automaton has 5243 states and 16352 transitions. Word has length 22 [2021-03-10 21:16:40,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:40,361 INFO L480 AbstractCegarLoop]: Abstraction has 5243 states and 16352 transitions. [2021-03-10 21:16:40,361 INFO L481 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) [2021-03-10 21:16:40,361 INFO L276 IsEmpty]: Start isEmpty. Operand 5243 states and 16352 transitions. [2021-03-10 21:16:40,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:16:40,367 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:40,367 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:40,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2021-03-10 21:16:40,567 INFO L428 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:40,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:40,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1401029161, now seen corresponding path program 265 times [2021-03-10 21:16:40,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:40,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360767476] [2021-03-10 21:16:40,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:40,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:40,611 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:40,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360767476] [2021-03-10 21:16:40,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674000756] [2021-03-10 21:16:40,611 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:40,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:40,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:16:40,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:40,786 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:40,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:40,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-03-10 21:16:40,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428312577] [2021-03-10 21:16:40,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:16:40,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:40,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:16:40,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:16:40,787 INFO L87 Difference]: Start difference. First operand 5243 states and 16352 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:41,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:41,458 INFO L93 Difference]: Finished difference Result 6611 states and 19949 transitions. [2021-03-10 21:16:41,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 21:16:41,459 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:16:41,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:41,467 INFO L225 Difference]: With dead ends: 6611 [2021-03-10 21:16:41,467 INFO L226 Difference]: Without dead ends: 6611 [2021-03-10 21:16:41,467 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 555.7ms TimeCoverageRelationStatistics Valid=827, Invalid=1929, Unknown=0, NotChecked=0, Total=2756 [2021-03-10 21:16:41,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6611 states. [2021-03-10 21:16:41,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6611 to 5413. [2021-03-10 21:16:41,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5413 states, 5412 states have (on average 3.1225055432372506) internal successors, (16899), 5412 states have internal predecessors, (16899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:41,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5413 states to 5413 states and 16899 transitions. [2021-03-10 21:16:41,539 INFO L78 Accepts]: Start accepts. Automaton has 5413 states and 16899 transitions. Word has length 22 [2021-03-10 21:16:41,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:41,539 INFO L480 AbstractCegarLoop]: Abstraction has 5413 states and 16899 transitions. [2021-03-10 21:16:41,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:41,539 INFO L276 IsEmpty]: Start isEmpty. Operand 5413 states and 16899 transitions. [2021-03-10 21:16:41,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:16:41,545 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:41,545 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:41,745 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable446 [2021-03-10 21:16:41,745 INFO L428 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:41,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:41,745 INFO L82 PathProgramCache]: Analyzing trace with hash 372644175, now seen corresponding path program 266 times [2021-03-10 21:16:41,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:41,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784810718] [2021-03-10 21:16:41,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:41,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:41,788 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:41,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784810718] [2021-03-10 21:16:41,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603635009] [2021-03-10 21:16:41,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:41,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:16:41,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:41,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:16:41,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:41,953 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:41,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:41,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-03-10 21:16:41,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063327864] [2021-03-10 21:16:41,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:16:41,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:41,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:16:41,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:16:41,953 INFO L87 Difference]: Start difference. First operand 5413 states and 16899 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 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) [2021-03-10 21:16:42,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:42,620 INFO L93 Difference]: Finished difference Result 7182 states and 21641 transitions. [2021-03-10 21:16:42,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 21:16:42,621 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 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 22 [2021-03-10 21:16:42,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:42,630 INFO L225 Difference]: With dead ends: 7182 [2021-03-10 21:16:42,630 INFO L226 Difference]: Without dead ends: 7182 [2021-03-10 21:16:42,630 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 556.2ms TimeCoverageRelationStatistics Valid=864, Invalid=1788, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 21:16:42,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7182 states. [2021-03-10 21:16:42,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7182 to 5709. [2021-03-10 21:16:42,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5709 states, 5708 states have (on average 3.128416257883672) internal successors, (17857), 5708 states have internal predecessors, (17857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:42,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5709 states to 5709 states and 17857 transitions. [2021-03-10 21:16:42,707 INFO L78 Accepts]: Start accepts. Automaton has 5709 states and 17857 transitions. Word has length 22 [2021-03-10 21:16:42,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:42,707 INFO L480 AbstractCegarLoop]: Abstraction has 5709 states and 17857 transitions. [2021-03-10 21:16:42,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 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) [2021-03-10 21:16:42,707 INFO L276 IsEmpty]: Start isEmpty. Operand 5709 states and 17857 transitions. [2021-03-10 21:16:42,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:16:42,713 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:42,713 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:42,915 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable447,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:42,915 INFO L428 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:42,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:42,915 INFO L82 PathProgramCache]: Analyzing trace with hash -539971881, now seen corresponding path program 267 times [2021-03-10 21:16:42,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:42,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278728907] [2021-03-10 21:16:42,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:42,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:42,950 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:42,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278728907] [2021-03-10 21:16:42,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929307700] [2021-03-10 21:16:42,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:42,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:16:42,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:42,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:16:42,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:43,114 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:43,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:43,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 19 [2021-03-10 21:16:43,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467421479] [2021-03-10 21:16:43,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:16:43,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:43,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:16:43,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:16:43,115 INFO L87 Difference]: Start difference. First operand 5709 states and 17857 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 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) [2021-03-10 21:16:43,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:43,800 INFO L93 Difference]: Finished difference Result 8455 states and 25540 transitions. [2021-03-10 21:16:43,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 21:16:43,801 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 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 22 [2021-03-10 21:16:43,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:43,810 INFO L225 Difference]: With dead ends: 8455 [2021-03-10 21:16:43,810 INFO L226 Difference]: Without dead ends: 8455 [2021-03-10 21:16:43,810 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 570.2ms TimeCoverageRelationStatistics Valid=950, Invalid=1702, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 21:16:43,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8455 states. [2021-03-10 21:16:43,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8455 to 6970. [2021-03-10 21:16:43,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6970 states, 6969 states have (on average 3.147366910604104) internal successors, (21934), 6969 states have internal predecessors, (21934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:43,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6970 states to 6970 states and 21934 transitions. [2021-03-10 21:16:43,899 INFO L78 Accepts]: Start accepts. Automaton has 6970 states and 21934 transitions. Word has length 22 [2021-03-10 21:16:43,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:43,899 INFO L480 AbstractCegarLoop]: Abstraction has 6970 states and 21934 transitions. [2021-03-10 21:16:43,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 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) [2021-03-10 21:16:43,899 INFO L276 IsEmpty]: Start isEmpty. Operand 6970 states and 21934 transitions. [2021-03-10 21:16:43,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:16:43,907 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:43,907 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:44,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable448 [2021-03-10 21:16:44,107 INFO L428 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:44,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:44,107 INFO L82 PathProgramCache]: Analyzing trace with hash 31482925, now seen corresponding path program 268 times [2021-03-10 21:16:44,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:44,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570726610] [2021-03-10 21:16:44,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:44,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:44,146 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:44,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570726610] [2021-03-10 21:16:44,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147463229] [2021-03-10 21:16:44,147 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 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 [2021-03-10 21:16:44,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:16:44,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:44,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:16:44,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:44,307 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:44,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:44,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 19 [2021-03-10 21:16:44,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657924780] [2021-03-10 21:16:44,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:16:44,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:44,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:16:44,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:16:44,308 INFO L87 Difference]: Start difference. First operand 6970 states and 21934 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 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) [2021-03-10 21:16:45,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:45,442 INFO L93 Difference]: Finished difference Result 8123 states and 24573 transitions. [2021-03-10 21:16:45,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-03-10 21:16:45,442 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 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 22 [2021-03-10 21:16:45,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:45,453 INFO L225 Difference]: With dead ends: 8123 [2021-03-10 21:16:45,453 INFO L226 Difference]: Without dead ends: 8117 [2021-03-10 21:16:45,454 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2442 ImplicationChecksByTransitivity, 958.2ms TimeCoverageRelationStatistics Valid=1939, Invalid=4703, Unknown=0, NotChecked=0, Total=6642 [2021-03-10 21:16:45,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8117 states. [2021-03-10 21:16:45,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8117 to 6930. [2021-03-10 21:16:45,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6930 states, 6929 states have (on average 3.1440323278972433) internal successors, (21785), 6929 states have internal predecessors, (21785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:45,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6930 states to 6930 states and 21785 transitions. [2021-03-10 21:16:45,568 INFO L78 Accepts]: Start accepts. Automaton has 6930 states and 21785 transitions. Word has length 22 [2021-03-10 21:16:45,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:45,568 INFO L480 AbstractCegarLoop]: Abstraction has 6930 states and 21785 transitions. [2021-03-10 21:16:45,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 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) [2021-03-10 21:16:45,568 INFO L276 IsEmpty]: Start isEmpty. Operand 6930 states and 21785 transitions. [2021-03-10 21:16:45,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:16:45,574 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:45,574 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:45,775 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:45,775 INFO L428 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:45,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:45,775 INFO L82 PathProgramCache]: Analyzing trace with hash 566712727, now seen corresponding path program 269 times [2021-03-10 21:16:45,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:45,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892277120] [2021-03-10 21:16:45,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:45,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:45,820 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:45,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892277120] [2021-03-10 21:16:45,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772628652] [2021-03-10 21:16:45,821 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 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 [2021-03-10 21:16:45,839 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:16:45,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:45,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:16:45,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:45,998 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:45,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:45,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-03-10 21:16:45,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24027903] [2021-03-10 21:16:45,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:16:45,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:45,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:16:45,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:16:45,999 INFO L87 Difference]: Start difference. First operand 6930 states and 21785 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 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) [2021-03-10 21:16:47,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:47,033 INFO L93 Difference]: Finished difference Result 8123 states and 24622 transitions. [2021-03-10 21:16:47,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-03-10 21:16:47,034 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 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 22 [2021-03-10 21:16:47,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:47,045 INFO L225 Difference]: With dead ends: 8123 [2021-03-10 21:16:47,046 INFO L226 Difference]: Without dead ends: 8111 [2021-03-10 21:16:47,046 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 900.4ms TimeCoverageRelationStatistics Valid=1649, Invalid=4203, Unknown=0, NotChecked=0, Total=5852 [2021-03-10 21:16:47,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8111 states. [2021-03-10 21:16:47,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8111 to 6927. [2021-03-10 21:16:47,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6927 states, 6926 states have (on average 3.1453941669073058) internal successors, (21785), 6926 states have internal predecessors, (21785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:47,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6927 states to 6927 states and 21785 transitions. [2021-03-10 21:16:47,163 INFO L78 Accepts]: Start accepts. Automaton has 6927 states and 21785 transitions. Word has length 22 [2021-03-10 21:16:47,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:47,163 INFO L480 AbstractCegarLoop]: Abstraction has 6927 states and 21785 transitions. [2021-03-10 21:16:47,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 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) [2021-03-10 21:16:47,163 INFO L276 IsEmpty]: Start isEmpty. Operand 6927 states and 21785 transitions. [2021-03-10 21:16:47,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:16:47,172 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:47,172 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:47,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:47,372 INFO L428 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:47,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:47,372 INFO L82 PathProgramCache]: Analyzing trace with hash -21032595, now seen corresponding path program 270 times [2021-03-10 21:16:47,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:47,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682992913] [2021-03-10 21:16:47,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:47,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:47,420 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:47,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682992913] [2021-03-10 21:16:47,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555916373] [2021-03-10 21:16:47,420 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:47,438 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:16:47,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:47,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:16:47,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:47,596 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:47,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:47,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-03-10 21:16:47,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100551350] [2021-03-10 21:16:47,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:16:47,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:47,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:16:47,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:16:47,597 INFO L87 Difference]: Start difference. First operand 6927 states and 21785 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:48,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:48,520 INFO L93 Difference]: Finished difference Result 8230 states and 24962 transitions. [2021-03-10 21:16:48,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-03-10 21:16:48,521 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:16:48,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:48,531 INFO L225 Difference]: With dead ends: 8230 [2021-03-10 21:16:48,532 INFO L226 Difference]: Without dead ends: 8212 [2021-03-10 21:16:48,532 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1783 ImplicationChecksByTransitivity, 821.1ms TimeCoverageRelationStatistics Valid=1425, Invalid=3831, Unknown=0, NotChecked=0, Total=5256 [2021-03-10 21:16:48,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8212 states. [2021-03-10 21:16:48,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8212 to 7085. [2021-03-10 21:16:48,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7085 states, 7084 states have (on average 3.148927159796725) internal successors, (22307), 7084 states have internal predecessors, (22307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:48,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7085 states to 7085 states and 22307 transitions. [2021-03-10 21:16:48,633 INFO L78 Accepts]: Start accepts. Automaton has 7085 states and 22307 transitions. Word has length 22 [2021-03-10 21:16:48,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:48,633 INFO L480 AbstractCegarLoop]: Abstraction has 7085 states and 22307 transitions. [2021-03-10 21:16:48,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:48,634 INFO L276 IsEmpty]: Start isEmpty. Operand 7085 states and 22307 transitions. [2021-03-10 21:16:48,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:16:48,641 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:48,641 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:48,842 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:48,842 INFO L428 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:48,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:48,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1061268393, now seen corresponding path program 271 times [2021-03-10 21:16:48,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:48,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575342527] [2021-03-10 21:16:48,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:48,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:48,904 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:48,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575342527] [2021-03-10 21:16:48,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327066061] [2021-03-10 21:16:48,904 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:48,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:48,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:16:48,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:49,089 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:49,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:49,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-03-10 21:16:49,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726449687] [2021-03-10 21:16:49,089 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:16:49,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:49,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:16:49,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:16:49,090 INFO L87 Difference]: Start difference. First operand 7085 states and 22307 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) [2021-03-10 21:16:49,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:49,993 INFO L93 Difference]: Finished difference Result 8473 states and 25731 transitions. [2021-03-10 21:16:49,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-03-10 21:16:49,994 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 22 [2021-03-10 21:16:49,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:50,004 INFO L225 Difference]: With dead ends: 8473 [2021-03-10 21:16:50,004 INFO L226 Difference]: Without dead ends: 8449 [2021-03-10 21:16:50,005 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1574 ImplicationChecksByTransitivity, 826.8ms TimeCoverageRelationStatistics Valid=1272, Invalid=3558, Unknown=0, NotChecked=0, Total=4830 [2021-03-10 21:16:50,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8449 states. [2021-03-10 21:16:50,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8449 to 7305. [2021-03-10 21:16:50,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7305 states, 7304 states have (on average 3.1519715224534504) internal successors, (23022), 7304 states have internal predecessors, (23022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:50,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7305 states to 7305 states and 23022 transitions. [2021-03-10 21:16:50,114 INFO L78 Accepts]: Start accepts. Automaton has 7305 states and 23022 transitions. Word has length 22 [2021-03-10 21:16:50,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:50,114 INFO L480 AbstractCegarLoop]: Abstraction has 7305 states and 23022 transitions. [2021-03-10 21:16:50,114 INFO L481 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) [2021-03-10 21:16:50,114 INFO L276 IsEmpty]: Start isEmpty. Operand 7305 states and 23022 transitions. [2021-03-10 21:16:50,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:16:50,121 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:50,121 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:50,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable452 [2021-03-10 21:16:50,322 INFO L428 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:50,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:50,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1051160237, now seen corresponding path program 272 times [2021-03-10 21:16:50,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:50,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872801977] [2021-03-10 21:16:50,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:50,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:50,392 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:50,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872801977] [2021-03-10 21:16:50,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499792762] [2021-03-10 21:16:50,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:50,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:16:50,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:50,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:16:50,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:50,588 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:50,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:50,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-03-10 21:16:50,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649502306] [2021-03-10 21:16:50,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:16:50,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:50,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:16:50,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:16:50,589 INFO L87 Difference]: Start difference. First operand 7305 states and 23022 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 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) [2021-03-10 21:16:51,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:51,319 INFO L93 Difference]: Finished difference Result 8382 states and 25614 transitions. [2021-03-10 21:16:51,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-03-10 21:16:51,320 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 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 22 [2021-03-10 21:16:51,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:51,331 INFO L225 Difference]: With dead ends: 8382 [2021-03-10 21:16:51,331 INFO L226 Difference]: Without dead ends: 8352 [2021-03-10 21:16:51,332 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1414 ImplicationChecksByTransitivity, 714.9ms TimeCoverageRelationStatistics Valid=1194, Invalid=3362, Unknown=0, NotChecked=0, Total=4556 [2021-03-10 21:16:51,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8352 states. [2021-03-10 21:16:51,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8352 to 7353. [2021-03-10 21:16:51,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7353 states, 7352 states have (on average 3.1509793253536453) internal successors, (23166), 7352 states have internal predecessors, (23166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:51,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7353 states to 7353 states and 23166 transitions. [2021-03-10 21:16:51,441 INFO L78 Accepts]: Start accepts. Automaton has 7353 states and 23166 transitions. Word has length 22 [2021-03-10 21:16:51,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:51,441 INFO L480 AbstractCegarLoop]: Abstraction has 7353 states and 23166 transitions. [2021-03-10 21:16:51,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 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) [2021-03-10 21:16:51,441 INFO L276 IsEmpty]: Start isEmpty. Operand 7353 states and 23166 transitions. [2021-03-10 21:16:51,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:16:51,450 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:51,450 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:51,650 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2021-03-10 21:16:51,650 INFO L428 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:51,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:51,650 INFO L82 PathProgramCache]: Analyzing trace with hash -943740933, now seen corresponding path program 273 times [2021-03-10 21:16:51,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:51,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861512195] [2021-03-10 21:16:51,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:51,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:51,866 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:51,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861512195] [2021-03-10 21:16:51,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889589670] [2021-03-10 21:16:51,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:51,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:16:51,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:51,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:16:51,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:52,084 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:52,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:52,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-03-10 21:16:52,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24986446] [2021-03-10 21:16:52,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:16:52,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:52,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:16:52,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:16:52,084 INFO L87 Difference]: Start difference. First operand 7353 states and 23166 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:52,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:52,776 INFO L93 Difference]: Finished difference Result 7724 states and 23857 transitions. [2021-03-10 21:16:52,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:16:52,776 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:16:52,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:52,787 INFO L225 Difference]: With dead ends: 7724 [2021-03-10 21:16:52,787 INFO L226 Difference]: Without dead ends: 7695 [2021-03-10 21:16:52,787 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 519.8ms TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:16:52,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7695 states. [2021-03-10 21:16:52,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7695 to 7410. [2021-03-10 21:16:52,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7410 states, 7409 states have (on average 3.140099878526117) internal successors, (23265), 7409 states have internal predecessors, (23265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:52,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7410 states to 7410 states and 23265 transitions. [2021-03-10 21:16:52,888 INFO L78 Accepts]: Start accepts. Automaton has 7410 states and 23265 transitions. Word has length 23 [2021-03-10 21:16:52,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:52,888 INFO L480 AbstractCegarLoop]: Abstraction has 7410 states and 23265 transitions. [2021-03-10 21:16:52,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:52,888 INFO L276 IsEmpty]: Start isEmpty. Operand 7410 states and 23265 transitions. [2021-03-10 21:16:52,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:16:52,896 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:52,896 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:53,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-03-10 21:16:53,097 INFO L428 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:53,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:53,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1733943489, now seen corresponding path program 274 times [2021-03-10 21:16:53,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:53,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246358151] [2021-03-10 21:16:53,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:53,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:53,276 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:53,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246358151] [2021-03-10 21:16:53,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965447717] [2021-03-10 21:16:53,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:53,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:16:53,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:53,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:16:53,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:53,467 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:53,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:53,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-03-10 21:16:53,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408720251] [2021-03-10 21:16:53,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:16:53,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:53,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:16:53,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:16:53,468 INFO L87 Difference]: Start difference. First operand 7410 states and 23265 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:53,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:53,927 INFO L93 Difference]: Finished difference Result 7815 states and 24110 transitions. [2021-03-10 21:16:53,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:16:53,928 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:16:53,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:53,939 INFO L225 Difference]: With dead ends: 7815 [2021-03-10 21:16:53,939 INFO L226 Difference]: Without dead ends: 7808 [2021-03-10 21:16:53,939 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 357.3ms TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:16:53,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7808 states. [2021-03-10 21:16:54,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7808 to 7508. [2021-03-10 21:16:54,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7508 states, 7507 states have (on average 3.1443985613427468) internal successors, (23605), 7507 states have internal predecessors, (23605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:54,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7508 states to 7508 states and 23605 transitions. [2021-03-10 21:16:54,057 INFO L78 Accepts]: Start accepts. Automaton has 7508 states and 23605 transitions. Word has length 23 [2021-03-10 21:16:54,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:54,058 INFO L480 AbstractCegarLoop]: Abstraction has 7508 states and 23605 transitions. [2021-03-10 21:16:54,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:54,058 INFO L276 IsEmpty]: Start isEmpty. Operand 7508 states and 23605 transitions. [2021-03-10 21:16:54,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:16:54,067 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:54,067 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:54,267 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable457 [2021-03-10 21:16:54,267 INFO L428 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:54,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:54,267 INFO L82 PathProgramCache]: Analyzing trace with hash -119240765, now seen corresponding path program 275 times [2021-03-10 21:16:54,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:54,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776933849] [2021-03-10 21:16:54,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:54,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:54,427 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:54,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776933849] [2021-03-10 21:16:54,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795482827] [2021-03-10 21:16:54,427 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:54,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:16:54,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:54,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:16:54,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:54,677 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:54,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:54,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-03-10 21:16:54,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242499197] [2021-03-10 21:16:54,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:16:54,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:54,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:16:54,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:16:54,678 INFO L87 Difference]: Start difference. First operand 7508 states and 23605 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 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) [2021-03-10 21:16:55,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:55,103 INFO L93 Difference]: Finished difference Result 7801 states and 24090 transitions. [2021-03-10 21:16:55,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:16:55,104 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 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 23 [2021-03-10 21:16:55,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:55,115 INFO L225 Difference]: With dead ends: 7801 [2021-03-10 21:16:55,115 INFO L226 Difference]: Without dead ends: 7785 [2021-03-10 21:16:55,115 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 422.2ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:16:55,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7785 states. [2021-03-10 21:16:55,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7785 to 7430. [2021-03-10 21:16:55,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7430 states, 7429 states have (on average 3.142145645443532) internal successors, (23343), 7429 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:55,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7430 states to 7430 states and 23343 transitions. [2021-03-10 21:16:55,219 INFO L78 Accepts]: Start accepts. Automaton has 7430 states and 23343 transitions. Word has length 23 [2021-03-10 21:16:55,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:55,219 INFO L480 AbstractCegarLoop]: Abstraction has 7430 states and 23343 transitions. [2021-03-10 21:16:55,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 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) [2021-03-10 21:16:55,219 INFO L276 IsEmpty]: Start isEmpty. Operand 7430 states and 23343 transitions. [2021-03-10 21:16:55,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:16:55,228 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:55,228 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:55,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:55,428 INFO L428 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:55,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:55,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1162488683, now seen corresponding path program 276 times [2021-03-10 21:16:55,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:55,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313832834] [2021-03-10 21:16:55,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:55,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:55,590 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:55,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313832834] [2021-03-10 21:16:55,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496817111] [2021-03-10 21:16:55,591 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:55,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:16:55,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:55,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:16:55,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:55,822 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:55,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:55,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-03-10 21:16:55,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97867120] [2021-03-10 21:16:55,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:16:55,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:55,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:16:55,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:16:55,823 INFO L87 Difference]: Start difference. First operand 7430 states and 23343 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:56,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:56,307 INFO L93 Difference]: Finished difference Result 7734 states and 23848 transitions. [2021-03-10 21:16:56,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:16:56,308 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:16:56,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:56,318 INFO L225 Difference]: With dead ends: 7734 [2021-03-10 21:16:56,318 INFO L226 Difference]: Without dead ends: 7727 [2021-03-10 21:16:56,319 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 388.1ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:16:56,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7727 states. [2021-03-10 21:16:56,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7727 to 7430. [2021-03-10 21:16:56,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7430 states, 7429 states have (on average 3.142145645443532) internal successors, (23343), 7429 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:56,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7430 states to 7430 states and 23343 transitions. [2021-03-10 21:16:56,419 INFO L78 Accepts]: Start accepts. Automaton has 7430 states and 23343 transitions. Word has length 23 [2021-03-10 21:16:56,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:56,419 INFO L480 AbstractCegarLoop]: Abstraction has 7430 states and 23343 transitions. [2021-03-10 21:16:56,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:56,419 INFO L276 IsEmpty]: Start isEmpty. Operand 7430 states and 23343 transitions. [2021-03-10 21:16:56,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:16:56,427 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:56,427 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:56,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable463,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:56,628 INFO L428 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:56,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:56,628 INFO L82 PathProgramCache]: Analyzing trace with hash -627258881, now seen corresponding path program 277 times [2021-03-10 21:16:56,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:56,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137305725] [2021-03-10 21:16:56,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:56,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:56,858 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:56,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137305725] [2021-03-10 21:16:56,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872515166] [2021-03-10 21:16:56,859 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:56,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:56,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:16:56,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:57,096 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:57,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:57,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-03-10 21:16:57,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323458565] [2021-03-10 21:16:57,097 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:16:57,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:57,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:16:57,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:16:57,097 INFO L87 Difference]: Start difference. First operand 7430 states and 23343 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:57,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:57,682 INFO L93 Difference]: Finished difference Result 7751 states and 23873 transitions. [2021-03-10 21:16:57,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:16:57,682 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:16:57,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:57,694 INFO L225 Difference]: With dead ends: 7751 [2021-03-10 21:16:57,694 INFO L226 Difference]: Without dead ends: 7744 [2021-03-10 21:16:57,695 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 469.5ms TimeCoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:16:57,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7744 states. [2021-03-10 21:16:57,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7744 to 7430. [2021-03-10 21:16:57,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7430 states, 7429 states have (on average 3.142145645443532) internal successors, (23343), 7429 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:57,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7430 states to 7430 states and 23343 transitions. [2021-03-10 21:16:57,808 INFO L78 Accepts]: Start accepts. Automaton has 7430 states and 23343 transitions. Word has length 23 [2021-03-10 21:16:57,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:57,808 INFO L480 AbstractCegarLoop]: Abstraction has 7430 states and 23343 transitions. [2021-03-10 21:16:57,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:57,808 INFO L276 IsEmpty]: Start isEmpty. Operand 7430 states and 23343 transitions. [2021-03-10 21:16:57,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:16:57,816 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:57,817 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:58,017 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-03-10 21:16:58,017 INFO L428 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:58,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:58,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1215004203, now seen corresponding path program 278 times [2021-03-10 21:16:58,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:58,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796468463] [2021-03-10 21:16:58,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:58,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:58,206 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:58,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796468463] [2021-03-10 21:16:58,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273564594] [2021-03-10 21:16:58,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:58,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:16:58,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:58,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:16:58,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:58,466 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:58,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:58,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-03-10 21:16:58,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055631411] [2021-03-10 21:16:58,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:16:58,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:58,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:16:58,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:16:58,467 INFO L87 Difference]: Start difference. First operand 7430 states and 23343 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:59,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:59,026 INFO L93 Difference]: Finished difference Result 7771 states and 23903 transitions. [2021-03-10 21:16:59,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:16:59,027 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:16:59,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:59,037 INFO L225 Difference]: With dead ends: 7771 [2021-03-10 21:16:59,037 INFO L226 Difference]: Without dead ends: 7764 [2021-03-10 21:16:59,037 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 495.6ms TimeCoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:16:59,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7764 states. [2021-03-10 21:16:59,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7764 to 7430. [2021-03-10 21:16:59,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7430 states, 7429 states have (on average 3.142145645443532) internal successors, (23343), 7429 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:59,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7430 states to 7430 states and 23343 transitions. [2021-03-10 21:16:59,145 INFO L78 Accepts]: Start accepts. Automaton has 7430 states and 23343 transitions. Word has length 23 [2021-03-10 21:16:59,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:59,146 INFO L480 AbstractCegarLoop]: Abstraction has 7430 states and 23343 transitions. [2021-03-10 21:16:59,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:59,146 INFO L276 IsEmpty]: Start isEmpty. Operand 7430 states and 23343 transitions. [2021-03-10 21:16:59,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:16:59,154 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:59,154 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:59,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable469,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:59,355 INFO L428 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:59,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:59,355 INFO L82 PathProgramCache]: Analyzing trace with hash 2039727295, now seen corresponding path program 279 times [2021-03-10 21:16:59,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:59,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516179051] [2021-03-10 21:16:59,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:59,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:59,576 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:59,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516179051] [2021-03-10 21:16:59,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147927365] [2021-03-10 21:16:59,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:59,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:16:59,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:59,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:16:59,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:59,800 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:59,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:59,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-03-10 21:16:59,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153247803] [2021-03-10 21:16:59,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:16:59,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:59,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:16:59,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:16:59,801 INFO L87 Difference]: Start difference. First operand 7430 states and 23343 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:00,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:00,468 INFO L93 Difference]: Finished difference Result 7671 states and 23732 transitions. [2021-03-10 21:17:00,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:17:00,469 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:17:00,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:00,479 INFO L225 Difference]: With dead ends: 7671 [2021-03-10 21:17:00,479 INFO L226 Difference]: Without dead ends: 7664 [2021-03-10 21:17:00,479 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 529.3ms TimeCoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:17:00,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7664 states. [2021-03-10 21:17:00,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7664 to 7430. [2021-03-10 21:17:00,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7430 states, 7429 states have (on average 3.142145645443532) internal successors, (23343), 7429 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:00,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7430 states to 7430 states and 23343 transitions. [2021-03-10 21:17:00,580 INFO L78 Accepts]: Start accepts. Automaton has 7430 states and 23343 transitions. Word has length 23 [2021-03-10 21:17:00,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:00,580 INFO L480 AbstractCegarLoop]: Abstraction has 7430 states and 23343 transitions. [2021-03-10 21:17:00,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:00,580 INFO L276 IsEmpty]: Start isEmpty. Operand 7430 states and 23343 transitions. [2021-03-10 21:17:00,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:17:00,589 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:00,589 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:00,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:00,789 INFO L428 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:00,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:00,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1090073861, now seen corresponding path program 280 times [2021-03-10 21:17:00,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:00,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190875003] [2021-03-10 21:17:00,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:00,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:00,977 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:00,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190875003] [2021-03-10 21:17:00,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839277858] [2021-03-10 21:17:00,977 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:00,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:17:00,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:00,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:17:00,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:01,261 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:01,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:01,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-03-10 21:17:01,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259139261] [2021-03-10 21:17:01,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:17:01,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:01,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:17:01,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:17:01,262 INFO L87 Difference]: Start difference. First operand 7430 states and 23343 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2021-03-10 21:17:01,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:01,614 INFO L93 Difference]: Finished difference Result 7746 states and 24061 transitions. [2021-03-10 21:17:01,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:17:01,615 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 23 [2021-03-10 21:17:01,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:01,624 INFO L225 Difference]: With dead ends: 7746 [2021-03-10 21:17:01,625 INFO L226 Difference]: Without dead ends: 7739 [2021-03-10 21:17:01,625 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 442.7ms TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:17:01,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7739 states. [2021-03-10 21:17:01,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7739 to 7502. [2021-03-10 21:17:01,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7502 states, 7501 states have (on average 3.1463804826023196) internal successors, (23601), 7501 states have internal predecessors, (23601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:01,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7502 states to 7502 states and 23601 transitions. [2021-03-10 21:17:01,714 INFO L78 Accepts]: Start accepts. Automaton has 7502 states and 23601 transitions. Word has length 23 [2021-03-10 21:17:01,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:01,714 INFO L480 AbstractCegarLoop]: Abstraction has 7502 states and 23601 transitions. [2021-03-10 21:17:01,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2021-03-10 21:17:01,714 INFO L276 IsEmpty]: Start isEmpty. Operand 7502 states and 23601 transitions. [2021-03-10 21:17:01,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:17:01,722 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:01,722 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:01,922 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2021-03-10 21:17:01,922 INFO L428 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:01,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:01,922 INFO L82 PathProgramCache]: Analyzing trace with hash 524628863, now seen corresponding path program 281 times [2021-03-10 21:17:01,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:01,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754769961] [2021-03-10 21:17:01,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:01,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:02,116 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:02,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754769961] [2021-03-10 21:17:02,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670794580] [2021-03-10 21:17:02,116 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:02,137 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:17:02,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:02,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:17:02,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:02,407 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:02,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:02,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-03-10 21:17:02,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391400502] [2021-03-10 21:17:02,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:17:02,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:02,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:17:02,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:17:02,408 INFO L87 Difference]: Start difference. First operand 7502 states and 23601 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:02,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:02,753 INFO L93 Difference]: Finished difference Result 7747 states and 24058 transitions. [2021-03-10 21:17:02,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:17:02,754 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:17:02,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:02,764 INFO L225 Difference]: With dead ends: 7747 [2021-03-10 21:17:02,764 INFO L226 Difference]: Without dead ends: 7738 [2021-03-10 21:17:02,764 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 447.7ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:17:02,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7738 states. [2021-03-10 21:17:02,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7738 to 7502. [2021-03-10 21:17:02,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7502 states, 7501 states have (on average 3.1457139048126916) internal successors, (23596), 7501 states have internal predecessors, (23596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:02,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7502 states to 7502 states and 23596 transitions. [2021-03-10 21:17:02,863 INFO L78 Accepts]: Start accepts. Automaton has 7502 states and 23596 transitions. Word has length 23 [2021-03-10 21:17:02,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:02,864 INFO L480 AbstractCegarLoop]: Abstraction has 7502 states and 23596 transitions. [2021-03-10 21:17:02,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:02,864 INFO L276 IsEmpty]: Start isEmpty. Operand 7502 states and 23596 transitions. [2021-03-10 21:17:02,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:17:02,872 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:02,872 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:03,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-03-10 21:17:03,073 INFO L428 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:03,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:03,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1554664965, now seen corresponding path program 282 times [2021-03-10 21:17:03,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:03,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966203083] [2021-03-10 21:17:03,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:03,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:03,262 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:03,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966203083] [2021-03-10 21:17:03,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538473504] [2021-03-10 21:17:03,262 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:03,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:17:03,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:03,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:17:03,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:03,568 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:03,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:03,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-03-10 21:17:03,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842698714] [2021-03-10 21:17:03,568 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:17:03,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:03,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:17:03,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:17:03,569 INFO L87 Difference]: Start difference. First operand 7502 states and 23596 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:03,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:03,925 INFO L93 Difference]: Finished difference Result 7686 states and 23919 transitions. [2021-03-10 21:17:03,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:17:03,926 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:17:03,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:03,936 INFO L225 Difference]: With dead ends: 7686 [2021-03-10 21:17:03,936 INFO L226 Difference]: Without dead ends: 7679 [2021-03-10 21:17:03,936 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 470.0ms TimeCoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:17:03,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7679 states. [2021-03-10 21:17:04,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7679 to 7502. [2021-03-10 21:17:04,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7502 states, 7501 states have (on average 3.1457139048126916) internal successors, (23596), 7501 states have internal predecessors, (23596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:04,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7502 states to 7502 states and 23596 transitions. [2021-03-10 21:17:04,037 INFO L78 Accepts]: Start accepts. Automaton has 7502 states and 23596 transitions. Word has length 23 [2021-03-10 21:17:04,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:04,037 INFO L480 AbstractCegarLoop]: Abstraction has 7502 states and 23596 transitions. [2021-03-10 21:17:04,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:04,038 INFO L276 IsEmpty]: Start isEmpty. Operand 7502 states and 23596 transitions. [2021-03-10 21:17:04,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:17:04,046 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:04,046 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:04,246 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:04,246 INFO L428 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:04,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:04,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1690015423, now seen corresponding path program 283 times [2021-03-10 21:17:04,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:04,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226164436] [2021-03-10 21:17:04,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:04,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:04,430 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:04,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226164436] [2021-03-10 21:17:04,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061298681] [2021-03-10 21:17:04,430 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:04,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:04,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:17:04,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:04,708 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:04,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:04,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-03-10 21:17:04,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782257011] [2021-03-10 21:17:04,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:17:04,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:04,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:17:04,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:17:04,709 INFO L87 Difference]: Start difference. First operand 7502 states and 23596 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:05,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:05,199 INFO L93 Difference]: Finished difference Result 8082 states and 25035 transitions. [2021-03-10 21:17:05,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:17:05,200 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:17:05,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:05,211 INFO L225 Difference]: With dead ends: 8082 [2021-03-10 21:17:05,211 INFO L226 Difference]: Without dead ends: 8065 [2021-03-10 21:17:05,211 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 483.0ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:17:05,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8065 states. [2021-03-10 21:17:05,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8065 to 7691. [2021-03-10 21:17:05,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7691 states, 7690 states have (on average 3.15370611183355) internal successors, (24252), 7690 states have internal predecessors, (24252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:05,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7691 states to 7691 states and 24252 transitions. [2021-03-10 21:17:05,339 INFO L78 Accepts]: Start accepts. Automaton has 7691 states and 24252 transitions. Word has length 23 [2021-03-10 21:17:05,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:05,339 INFO L480 AbstractCegarLoop]: Abstraction has 7691 states and 24252 transitions. [2021-03-10 21:17:05,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:05,340 INFO L276 IsEmpty]: Start isEmpty. Operand 7691 states and 24252 transitions. [2021-03-10 21:17:05,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:17:05,349 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:05,349 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:05,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:05,549 INFO L428 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:05,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:05,550 INFO L82 PathProgramCache]: Analyzing trace with hash -990249149, now seen corresponding path program 284 times [2021-03-10 21:17:05,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:05,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331204141] [2021-03-10 21:17:05,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:05,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:05,756 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:05,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331204141] [2021-03-10 21:17:05,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105658341] [2021-03-10 21:17:05,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:05,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:17:05,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:05,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:17:05,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:05,995 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:05,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:05,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-03-10 21:17:05,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930498408] [2021-03-10 21:17:05,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:17:05,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:05,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:17:05,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:17:05,996 INFO L87 Difference]: Start difference. First operand 7691 states and 24252 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2021-03-10 21:17:06,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:06,420 INFO L93 Difference]: Finished difference Result 8086 states and 25005 transitions. [2021-03-10 21:17:06,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:17:06,420 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 23 [2021-03-10 21:17:06,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:06,431 INFO L225 Difference]: With dead ends: 8086 [2021-03-10 21:17:06,431 INFO L226 Difference]: Without dead ends: 8068 [2021-03-10 21:17:06,432 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 466.9ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:17:06,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8068 states. [2021-03-10 21:17:06,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8068 to 7641. [2021-03-10 21:17:06,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7641 states, 7640 states have (on average 3.148167539267016) internal successors, (24052), 7640 states have internal predecessors, (24052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:06,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7641 states to 7641 states and 24052 transitions. [2021-03-10 21:17:06,539 INFO L78 Accepts]: Start accepts. Automaton has 7641 states and 24052 transitions. Word has length 23 [2021-03-10 21:17:06,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:06,539 INFO L480 AbstractCegarLoop]: Abstraction has 7641 states and 24052 transitions. [2021-03-10 21:17:06,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2021-03-10 21:17:06,539 INFO L276 IsEmpty]: Start isEmpty. Operand 7641 states and 24052 transitions. [2021-03-10 21:17:06,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:17:06,547 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:06,547 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:06,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable487 [2021-03-10 21:17:06,748 INFO L428 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:06,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:06,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1225424319, now seen corresponding path program 285 times [2021-03-10 21:17:06,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:06,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622098656] [2021-03-10 21:17:06,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:06,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:06,972 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:06,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622098656] [2021-03-10 21:17:06,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876828612] [2021-03-10 21:17:06,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:06,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:17:06,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:06,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:17:06,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:07,269 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:07,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:07,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-03-10 21:17:07,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447720012] [2021-03-10 21:17:07,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:17:07,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:07,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:17:07,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:17:07,270 INFO L87 Difference]: Start difference. First operand 7641 states and 24052 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2021-03-10 21:17:07,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:07,724 INFO L93 Difference]: Finished difference Result 7976 states and 24675 transitions. [2021-03-10 21:17:07,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:17:07,725 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 23 [2021-03-10 21:17:07,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:07,735 INFO L225 Difference]: With dead ends: 7976 [2021-03-10 21:17:07,735 INFO L226 Difference]: Without dead ends: 7954 [2021-03-10 21:17:07,735 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 528.6ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:17:07,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7954 states. [2021-03-10 21:17:07,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7954 to 7625. [2021-03-10 21:17:07,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7625 states, 7624 states have (on average 3.147560335781742) internal successors, (23997), 7624 states have internal predecessors, (23997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:07,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7625 states to 7625 states and 23997 transitions. [2021-03-10 21:17:07,837 INFO L78 Accepts]: Start accepts. Automaton has 7625 states and 23997 transitions. Word has length 23 [2021-03-10 21:17:07,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:07,837 INFO L480 AbstractCegarLoop]: Abstraction has 7625 states and 23997 transitions. [2021-03-10 21:17:07,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2021-03-10 21:17:07,837 INFO L276 IsEmpty]: Start isEmpty. Operand 7625 states and 23997 transitions. [2021-03-10 21:17:07,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:17:07,845 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:07,846 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:08,046 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:08,046 INFO L428 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:08,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:08,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1191825091, now seen corresponding path program 286 times [2021-03-10 21:17:08,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:08,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240548623] [2021-03-10 21:17:08,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:08,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:08,309 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:08,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240548623] [2021-03-10 21:17:08,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738511922] [2021-03-10 21:17:08,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:08,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:17:08,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:08,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:17:08,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:08,542 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:08,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:08,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-03-10 21:17:08,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650985256] [2021-03-10 21:17:08,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:17:08,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:08,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:17:08,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:17:08,543 INFO L87 Difference]: Start difference. First operand 7625 states and 23997 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2021-03-10 21:17:09,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:09,050 INFO L93 Difference]: Finished difference Result 7875 states and 24443 transitions. [2021-03-10 21:17:09,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:17:09,051 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 23 [2021-03-10 21:17:09,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:09,062 INFO L225 Difference]: With dead ends: 7875 [2021-03-10 21:17:09,062 INFO L226 Difference]: Without dead ends: 7868 [2021-03-10 21:17:09,063 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 512.9ms TimeCoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:17:09,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7868 states. [2021-03-10 21:17:09,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7868 to 7625. [2021-03-10 21:17:09,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7625 states, 7624 states have (on average 3.147560335781742) internal successors, (23997), 7624 states have internal predecessors, (23997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:09,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7625 states to 7625 states and 23997 transitions. [2021-03-10 21:17:09,175 INFO L78 Accepts]: Start accepts. Automaton has 7625 states and 23997 transitions. Word has length 23 [2021-03-10 21:17:09,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:09,175 INFO L480 AbstractCegarLoop]: Abstraction has 7625 states and 23997 transitions. [2021-03-10 21:17:09,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2021-03-10 21:17:09,175 INFO L276 IsEmpty]: Start isEmpty. Operand 7625 states and 23997 transitions. [2021-03-10 21:17:09,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:17:09,184 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:09,184 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:09,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable493 [2021-03-10 21:17:09,385 INFO L428 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:09,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:09,385 INFO L82 PathProgramCache]: Analyzing trace with hash -2075509483, now seen corresponding path program 287 times [2021-03-10 21:17:09,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:09,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182659587] [2021-03-10 21:17:09,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:09,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:09,538 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:09,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182659587] [2021-03-10 21:17:09,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561238745] [2021-03-10 21:17:09,538 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:09,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:17:09,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:09,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:17:09,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:09,831 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:17:09,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:09,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-03-10 21:17:09,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840877135] [2021-03-10 21:17:09,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:17:09,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:09,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:17:09,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:17:09,832 INFO L87 Difference]: Start difference. First operand 7625 states and 23997 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2021-03-10 21:17:10,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:10,227 INFO L93 Difference]: Finished difference Result 7842 states and 24373 transitions. [2021-03-10 21:17:10,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:17:10,228 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 23 [2021-03-10 21:17:10,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:10,238 INFO L225 Difference]: With dead ends: 7842 [2021-03-10 21:17:10,239 INFO L226 Difference]: Without dead ends: 7829 [2021-03-10 21:17:10,239 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 424.3ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:17:10,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7829 states. [2021-03-10 21:17:10,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7829 to 7608. [2021-03-10 21:17:10,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7608 states, 7607 states have (on average 3.1456553174707507) internal successors, (23929), 7607 states have internal predecessors, (23929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:10,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7608 states to 7608 states and 23929 transitions. [2021-03-10 21:17:10,346 INFO L78 Accepts]: Start accepts. Automaton has 7608 states and 23929 transitions. Word has length 23 [2021-03-10 21:17:10,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:10,346 INFO L480 AbstractCegarLoop]: Abstraction has 7608 states and 23929 transitions. [2021-03-10 21:17:10,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2021-03-10 21:17:10,346 INFO L276 IsEmpty]: Start isEmpty. Operand 7608 states and 23929 transitions. [2021-03-10 21:17:10,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:17:10,355 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:10,355 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:10,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-03-10 21:17:10,555 INFO L428 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:10,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:10,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1973437307, now seen corresponding path program 288 times [2021-03-10 21:17:10,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:10,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475772172] [2021-03-10 21:17:10,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:10,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:10,745 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:10,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475772172] [2021-03-10 21:17:10,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710194128] [2021-03-10 21:17:10,745 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:10,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:17:10,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:10,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:17:10,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:10,999 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:10,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:10,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-03-10 21:17:10,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244444863] [2021-03-10 21:17:11,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:17:11,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:11,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:17:11,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:17:11,000 INFO L87 Difference]: Start difference. First operand 7608 states and 23929 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:11,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:11,559 INFO L93 Difference]: Finished difference Result 8242 states and 25517 transitions. [2021-03-10 21:17:11,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:17:11,559 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:17:11,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:11,569 INFO L225 Difference]: With dead ends: 8242 [2021-03-10 21:17:11,570 INFO L226 Difference]: Without dead ends: 8225 [2021-03-10 21:17:11,570 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 471.9ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:17:11,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8225 states. [2021-03-10 21:17:11,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8225 to 7836. [2021-03-10 21:17:11,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7836 states, 7835 states have (on average 3.1537970644543716) internal successors, (24710), 7835 states have internal predecessors, (24710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:11,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7836 states to 7836 states and 24710 transitions. [2021-03-10 21:17:11,687 INFO L78 Accepts]: Start accepts. Automaton has 7836 states and 24710 transitions. Word has length 23 [2021-03-10 21:17:11,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:11,687 INFO L480 AbstractCegarLoop]: Abstraction has 7836 states and 24710 transitions. [2021-03-10 21:17:11,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:11,687 INFO L276 IsEmpty]: Start isEmpty. Operand 7836 states and 24710 transitions. [2021-03-10 21:17:11,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:17:11,695 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:11,695 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:11,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-03-10 21:17:11,896 INFO L428 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:11,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:11,896 INFO L82 PathProgramCache]: Analyzing trace with hash -706827265, now seen corresponding path program 289 times [2021-03-10 21:17:11,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:11,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28538190] [2021-03-10 21:17:11,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:11,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:12,140 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:12,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28538190] [2021-03-10 21:17:12,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77469985] [2021-03-10 21:17:12,140 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:12,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:12,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:17:12,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:12,417 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:12,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:12,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-03-10 21:17:12,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548860763] [2021-03-10 21:17:12,418 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:17:12,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:12,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:17:12,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:17:12,418 INFO L87 Difference]: Start difference. First operand 7836 states and 24710 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:12,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:12,906 INFO L93 Difference]: Finished difference Result 8244 states and 25471 transitions. [2021-03-10 21:17:12,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:17:12,907 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:17:12,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:12,919 INFO L225 Difference]: With dead ends: 8244 [2021-03-10 21:17:12,919 INFO L226 Difference]: Without dead ends: 8226 [2021-03-10 21:17:12,919 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 517.4ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:17:12,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8226 states. [2021-03-10 21:17:13,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8226 to 7776. [2021-03-10 21:17:13,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7776 states, 7775 states have (on average 3.1481672025723473) internal successors, (24477), 7775 states have internal predecessors, (24477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:13,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7776 states to 7776 states and 24477 transitions. [2021-03-10 21:17:13,030 INFO L78 Accepts]: Start accepts. Automaton has 7776 states and 24477 transitions. Word has length 23 [2021-03-10 21:17:13,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:13,030 INFO L480 AbstractCegarLoop]: Abstraction has 7776 states and 24477 transitions. [2021-03-10 21:17:13,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:13,030 INFO L276 IsEmpty]: Start isEmpty. Operand 7776 states and 24477 transitions. [2021-03-10 21:17:13,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:17:13,039 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:13,039 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:13,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable502,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:13,239 INFO L428 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:13,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:13,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1508846203, now seen corresponding path program 290 times [2021-03-10 21:17:13,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:13,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055996315] [2021-03-10 21:17:13,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:13,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:13,437 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:13,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055996315] [2021-03-10 21:17:13,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424615080] [2021-03-10 21:17:13,438 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 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 [2021-03-10 21:17:13,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:17:13,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:13,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:17:13,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:13,704 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:13,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:13,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-03-10 21:17:13,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105845110] [2021-03-10 21:17:13,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:17:13,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:13,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:17:13,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:17:13,705 INFO L87 Difference]: Start difference. First operand 7776 states and 24477 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:14,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:14,213 INFO L93 Difference]: Finished difference Result 8185 states and 25224 transitions. [2021-03-10 21:17:14,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:17:14,214 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:17:14,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:14,225 INFO L225 Difference]: With dead ends: 8185 [2021-03-10 21:17:14,225 INFO L226 Difference]: Without dead ends: 8163 [2021-03-10 21:17:14,225 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 465.8ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:17:14,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8163 states. [2021-03-10 21:17:14,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8163 to 7750. [2021-03-10 21:17:14,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7750 states, 7749 states have (on average 3.145438121047877) internal successors, (24374), 7749 states have internal predecessors, (24374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:14,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7750 states to 7750 states and 24374 transitions. [2021-03-10 21:17:14,333 INFO L78 Accepts]: Start accepts. Automaton has 7750 states and 24374 transitions. Word has length 23 [2021-03-10 21:17:14,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:14,333 INFO L480 AbstractCegarLoop]: Abstraction has 7750 states and 24374 transitions. [2021-03-10 21:17:14,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:14,334 INFO L276 IsEmpty]: Start isEmpty. Operand 7750 states and 24374 transitions. [2021-03-10 21:17:14,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:17:14,342 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:14,342 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:14,543 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:14,543 INFO L428 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:14,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:14,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1475246975, now seen corresponding path program 291 times [2021-03-10 21:17:14,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:14,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207162025] [2021-03-10 21:17:14,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:14,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:14,802 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:14,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207162025] [2021-03-10 21:17:14,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979487375] [2021-03-10 21:17:14,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:14,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:17:14,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:14,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:17:14,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:15,022 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:15,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:15,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-03-10 21:17:15,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145086505] [2021-03-10 21:17:15,022 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:17:15,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:15,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:17:15,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:17:15,023 INFO L87 Difference]: Start difference. First operand 7750 states and 24374 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:15,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:15,673 INFO L93 Difference]: Finished difference Result 8091 states and 24993 transitions. [2021-03-10 21:17:15,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:17:15,674 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:17:15,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:15,685 INFO L225 Difference]: With dead ends: 8091 [2021-03-10 21:17:15,685 INFO L226 Difference]: Without dead ends: 8065 [2021-03-10 21:17:15,685 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 557.7ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:17:15,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8065 states. [2021-03-10 21:17:15,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8065 to 7731. [2021-03-10 21:17:15,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7731 states, 7730 states have (on average 3.144890038809832) internal successors, (24310), 7730 states have internal predecessors, (24310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:15,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7731 states to 7731 states and 24310 transitions. [2021-03-10 21:17:15,791 INFO L78 Accepts]: Start accepts. Automaton has 7731 states and 24310 transitions. Word has length 23 [2021-03-10 21:17:15,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:15,792 INFO L480 AbstractCegarLoop]: Abstraction has 7731 states and 24310 transitions. [2021-03-10 21:17:15,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:15,792 INFO L276 IsEmpty]: Start isEmpty. Operand 7731 states and 24310 transitions. [2021-03-10 21:17:15,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:17:15,801 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:15,801 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:16,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:16,001 INFO L428 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:16,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:16,001 INFO L82 PathProgramCache]: Analyzing trace with hash 433670907, now seen corresponding path program 292 times [2021-03-10 21:17:16,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:16,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112421240] [2021-03-10 21:17:16,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:16,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:16,235 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:16,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112421240] [2021-03-10 21:17:16,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684251548] [2021-03-10 21:17:16,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:16,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:17:16,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:16,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:17:16,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:16,495 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:16,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:16,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-03-10 21:17:16,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967199840] [2021-03-10 21:17:16,496 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:17:16,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:16,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:17:16,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:17:16,496 INFO L87 Difference]: Start difference. First operand 7731 states and 24310 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:17,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:17,045 INFO L93 Difference]: Finished difference Result 7972 states and 24730 transitions. [2021-03-10 21:17:17,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:17:17,046 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:17:17,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:17,057 INFO L225 Difference]: With dead ends: 7972 [2021-03-10 21:17:17,057 INFO L226 Difference]: Without dead ends: 7965 [2021-03-10 21:17:17,058 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 510.8ms TimeCoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:17:17,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7965 states. [2021-03-10 21:17:17,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7965 to 7731. [2021-03-10 21:17:17,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7731 states, 7730 states have (on average 3.144890038809832) internal successors, (24310), 7730 states have internal predecessors, (24310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:17,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7731 states to 7731 states and 24310 transitions. [2021-03-10 21:17:17,169 INFO L78 Accepts]: Start accepts. Automaton has 7731 states and 24310 transitions. Word has length 23 [2021-03-10 21:17:17,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:17,169 INFO L480 AbstractCegarLoop]: Abstraction has 7731 states and 24310 transitions. [2021-03-10 21:17:17,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:17,169 INFO L276 IsEmpty]: Start isEmpty. Operand 7731 states and 24310 transitions. [2021-03-10 21:17:17,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:17:17,178 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:17,178 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:17,378 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable511 [2021-03-10 21:17:17,379 INFO L428 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:17,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:17,379 INFO L82 PathProgramCache]: Analyzing trace with hash -906289319, now seen corresponding path program 293 times [2021-03-10 21:17:17,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:17,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307214551] [2021-03-10 21:17:17,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:17,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:17,581 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:17,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307214551] [2021-03-10 21:17:17,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53985419] [2021-03-10 21:17:17,582 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:17,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:17:17,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:17,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:17:17,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:17,800 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:17:17,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:17,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-03-10 21:17:17,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124664814] [2021-03-10 21:17:17,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:17:17,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:17,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:17:17,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:17:17,801 INFO L87 Difference]: Start difference. First operand 7731 states and 24310 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2021-03-10 21:17:18,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:18,234 INFO L93 Difference]: Finished difference Result 7915 states and 24623 transitions. [2021-03-10 21:17:18,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:17:18,234 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 23 [2021-03-10 21:17:18,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:18,245 INFO L225 Difference]: With dead ends: 7915 [2021-03-10 21:17:18,245 INFO L226 Difference]: Without dead ends: 7902 [2021-03-10 21:17:18,245 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 413.8ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:17:18,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7902 states. [2021-03-10 21:17:18,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7902 to 7707. [2021-03-10 21:17:18,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7707 states, 7706 states have (on average 3.1418375291980274) internal successors, (24211), 7706 states have internal predecessors, (24211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:18,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7707 states to 7707 states and 24211 transitions. [2021-03-10 21:17:18,369 INFO L78 Accepts]: Start accepts. Automaton has 7707 states and 24211 transitions. Word has length 23 [2021-03-10 21:17:18,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:18,369 INFO L480 AbstractCegarLoop]: Abstraction has 7707 states and 24211 transitions. [2021-03-10 21:17:18,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2021-03-10 21:17:18,370 INFO L276 IsEmpty]: Start isEmpty. Operand 7707 states and 24211 transitions. [2021-03-10 21:17:18,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:17:18,378 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:18,378 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:18,578 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-03-10 21:17:18,579 INFO L428 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:18,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:18,579 INFO L82 PathProgramCache]: Analyzing trace with hash -2125386177, now seen corresponding path program 294 times [2021-03-10 21:17:18,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:18,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312583166] [2021-03-10 21:17:18,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:18,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:18,787 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:18,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312583166] [2021-03-10 21:17:18,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696280921] [2021-03-10 21:17:18,788 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:18,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:17:18,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:18,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:17:18,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:19,061 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:19,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:19,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-03-10 21:17:19,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793960462] [2021-03-10 21:17:19,062 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:17:19,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:19,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:17:19,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:17:19,062 INFO L87 Difference]: Start difference. First operand 7707 states and 24211 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:19,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:19,635 INFO L93 Difference]: Finished difference Result 8283 states and 25598 transitions. [2021-03-10 21:17:19,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:17:19,635 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:17:19,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:19,645 INFO L225 Difference]: With dead ends: 8283 [2021-03-10 21:17:19,645 INFO L226 Difference]: Without dead ends: 8266 [2021-03-10 21:17:19,645 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 485.7ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:17:19,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8266 states. [2021-03-10 21:17:19,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8266 to 7931. [2021-03-10 21:17:19,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7931 states, 7930 states have (on average 3.1479192938209333) internal successors, (24963), 7930 states have internal predecessors, (24963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:19,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7931 states to 7931 states and 24963 transitions. [2021-03-10 21:17:19,744 INFO L78 Accepts]: Start accepts. Automaton has 7931 states and 24963 transitions. Word has length 23 [2021-03-10 21:17:19,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:19,744 INFO L480 AbstractCegarLoop]: Abstraction has 7931 states and 24963 transitions. [2021-03-10 21:17:19,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:19,744 INFO L276 IsEmpty]: Start isEmpty. Operand 7931 states and 24963 transitions. [2021-03-10 21:17:19,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:17:19,754 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:19,754 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:19,954 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable517,298 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:19,954 INFO L428 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:19,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:19,954 INFO L82 PathProgramCache]: Analyzing trace with hash -510683453, now seen corresponding path program 295 times [2021-03-10 21:17:19,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:19,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510699314] [2021-03-10 21:17:19,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:19,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:20,165 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:20,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510699314] [2021-03-10 21:17:20,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432415222] [2021-03-10 21:17:20,166 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 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 [2021-03-10 21:17:20,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:20,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:17:20,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:20,413 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:20,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:20,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-03-10 21:17:20,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038763700] [2021-03-10 21:17:20,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:17:20,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:20,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:17:20,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:17:20,414 INFO L87 Difference]: Start difference. First operand 7931 states and 24963 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:20,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:20,923 INFO L93 Difference]: Finished difference Result 8281 states and 25535 transitions. [2021-03-10 21:17:20,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:17:20,924 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:17:20,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:20,935 INFO L225 Difference]: With dead ends: 8281 [2021-03-10 21:17:20,935 INFO L226 Difference]: Without dead ends: 8263 [2021-03-10 21:17:20,935 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 476.8ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:17:20,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8263 states. [2021-03-10 21:17:21,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8263 to 7865. [2021-03-10 21:17:21,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7865 states, 7864 states have (on average 3.1434384537131232) internal successors, (24720), 7864 states have internal predecessors, (24720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:21,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7865 states to 7865 states and 24720 transitions. [2021-03-10 21:17:21,049 INFO L78 Accepts]: Start accepts. Automaton has 7865 states and 24720 transitions. Word has length 23 [2021-03-10 21:17:21,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:21,049 INFO L480 AbstractCegarLoop]: Abstraction has 7865 states and 24720 transitions. [2021-03-10 21:17:21,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:21,049 INFO L276 IsEmpty]: Start isEmpty. Operand 7865 states and 24720 transitions. [2021-03-10 21:17:21,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:17:21,059 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:21,059 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:21,259 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 299 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable520 [2021-03-10 21:17:21,259 INFO L428 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:21,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:21,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1704990015, now seen corresponding path program 296 times [2021-03-10 21:17:21,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:21,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688898478] [2021-03-10 21:17:21,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:21,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:21,439 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:21,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688898478] [2021-03-10 21:17:21,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258928984] [2021-03-10 21:17:21,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:21,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:17:21,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:21,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:17:21,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:21,679 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:21,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:21,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-03-10 21:17:21,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442814372] [2021-03-10 21:17:21,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:17:21,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:21,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:17:21,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:17:21,680 INFO L87 Difference]: Start difference. First operand 7865 states and 24720 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:22,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:22,370 INFO L93 Difference]: Finished difference Result 8238 states and 25326 transitions. [2021-03-10 21:17:22,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:17:22,371 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:17:22,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:22,382 INFO L225 Difference]: With dead ends: 8238 [2021-03-10 21:17:22,382 INFO L226 Difference]: Without dead ends: 8216 [2021-03-10 21:17:22,382 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 487.4ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:17:22,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8216 states. [2021-03-10 21:17:22,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8216 to 7840. [2021-03-10 21:17:22,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7840 states, 7839 states have (on average 3.1408342900880215) internal successors, (24621), 7839 states have internal predecessors, (24621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:22,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7840 states to 7840 states and 24621 transitions. [2021-03-10 21:17:22,484 INFO L78 Accepts]: Start accepts. Automaton has 7840 states and 24621 transitions. Word has length 23 [2021-03-10 21:17:22,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:22,484 INFO L480 AbstractCegarLoop]: Abstraction has 7840 states and 24621 transitions. [2021-03-10 21:17:22,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:22,484 INFO L276 IsEmpty]: Start isEmpty. Operand 7840 states and 24621 transitions. [2021-03-10 21:17:22,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:17:22,491 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:22,491 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:22,692 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable523 [2021-03-10 21:17:22,692 INFO L428 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:22,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:22,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1671390787, now seen corresponding path program 297 times [2021-03-10 21:17:22,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:22,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606544356] [2021-03-10 21:17:22,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:22,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:22,915 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:22,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606544356] [2021-03-10 21:17:22,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3282297] [2021-03-10 21:17:22,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:22,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:17:22,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:22,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:17:22,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:23,192 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:23,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:23,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-03-10 21:17:23,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558855579] [2021-03-10 21:17:23,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:17:23,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:23,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:17:23,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:17:23,192 INFO L87 Difference]: Start difference. First operand 7840 states and 24621 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:23,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:23,888 INFO L93 Difference]: Finished difference Result 8244 states and 25274 transitions. [2021-03-10 21:17:23,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:17:23,889 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:17:23,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:23,900 INFO L225 Difference]: With dead ends: 8244 [2021-03-10 21:17:23,900 INFO L226 Difference]: Without dead ends: 8218 [2021-03-10 21:17:23,900 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 541.3ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:17:23,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8218 states. [2021-03-10 21:17:23,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8218 to 7816. [2021-03-10 21:17:23,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7816 states, 7815 states have (on average 3.1396033269353807) internal successors, (24536), 7815 states have internal predecessors, (24536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:24,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7816 states to 7816 states and 24536 transitions. [2021-03-10 21:17:24,010 INFO L78 Accepts]: Start accepts. Automaton has 7816 states and 24536 transitions. Word has length 23 [2021-03-10 21:17:24,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:24,010 INFO L480 AbstractCegarLoop]: Abstraction has 7816 states and 24536 transitions. [2021-03-10 21:17:24,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:24,010 INFO L276 IsEmpty]: Start isEmpty. Operand 7816 states and 24536 transitions. [2021-03-10 21:17:24,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:17:24,020 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:24,020 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:24,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable526,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:24,220 INFO L428 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:24,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:24,220 INFO L82 PathProgramCache]: Analyzing trace with hash 629814719, now seen corresponding path program 298 times [2021-03-10 21:17:24,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:24,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223593997] [2021-03-10 21:17:24,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:24,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:24,390 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:24,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223593997] [2021-03-10 21:17:24,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91202378] [2021-03-10 21:17:24,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:24,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:17:24,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:24,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:17:24,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:24,641 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:24,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:24,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-03-10 21:17:24,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822283613] [2021-03-10 21:17:24,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:17:24,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:24,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:17:24,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:17:24,642 INFO L87 Difference]: Start difference. First operand 7816 states and 24536 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:25,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:25,400 INFO L93 Difference]: Finished difference Result 8147 states and 25070 transitions. [2021-03-10 21:17:25,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:17:25,400 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:17:25,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:25,410 INFO L225 Difference]: With dead ends: 8147 [2021-03-10 21:17:25,410 INFO L226 Difference]: Without dead ends: 8117 [2021-03-10 21:17:25,410 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 532.8ms TimeCoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:17:25,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8117 states. [2021-03-10 21:17:25,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8117 to 7795. [2021-03-10 21:17:25,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7795 states, 7794 states have (on average 3.1395945599178856) internal successors, (24470), 7794 states have internal predecessors, (24470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:25,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7795 states to 7795 states and 24470 transitions. [2021-03-10 21:17:25,541 INFO L78 Accepts]: Start accepts. Automaton has 7795 states and 24470 transitions. Word has length 23 [2021-03-10 21:17:25,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:25,541 INFO L480 AbstractCegarLoop]: Abstraction has 7795 states and 24470 transitions. [2021-03-10 21:17:25,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:25,542 INFO L276 IsEmpty]: Start isEmpty. Operand 7795 states and 24470 transitions. [2021-03-10 21:17:25,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:17:25,550 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:25,550 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:25,750 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable529,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:25,750 INFO L428 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:25,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:25,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1594272317, now seen corresponding path program 299 times [2021-03-10 21:17:25,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:25,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824378368] [2021-03-10 21:17:25,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:25,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:26,002 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:26,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824378368] [2021-03-10 21:17:26,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628987441] [2021-03-10 21:17:26,003 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 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 [2021-03-10 21:17:26,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:17:26,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:26,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:17:26,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:26,269 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:26,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:26,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-03-10 21:17:26,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232674000] [2021-03-10 21:17:26,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:17:26,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:26,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:17:26,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:17:26,270 INFO L87 Difference]: Start difference. First operand 7795 states and 24470 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:26,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:26,934 INFO L93 Difference]: Finished difference Result 8028 states and 24837 transitions. [2021-03-10 21:17:26,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:17:26,935 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:17:26,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:26,946 INFO L225 Difference]: With dead ends: 8028 [2021-03-10 21:17:26,946 INFO L226 Difference]: Without dead ends: 8021 [2021-03-10 21:17:26,946 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 545.8ms TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:17:26,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8021 states. [2021-03-10 21:17:27,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8021 to 7797. [2021-03-10 21:17:27,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7797 states, 7796 states have (on average 3.1391739353514625) internal successors, (24473), 7796 states have internal predecessors, (24473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:27,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7797 states to 7797 states and 24473 transitions. [2021-03-10 21:17:27,067 INFO L78 Accepts]: Start accepts. Automaton has 7797 states and 24473 transitions. Word has length 23 [2021-03-10 21:17:27,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:27,067 INFO L480 AbstractCegarLoop]: Abstraction has 7797 states and 24473 transitions. [2021-03-10 21:17:27,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:27,067 INFO L276 IsEmpty]: Start isEmpty. Operand 7797 states and 24473 transitions. [2021-03-10 21:17:27,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:17:27,078 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:27,078 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:27,278 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-03-10 21:17:27,278 INFO L428 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:27,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:27,278 INFO L82 PathProgramCache]: Analyzing trace with hash 979797397, now seen corresponding path program 300 times [2021-03-10 21:17:27,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:27,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072037068] [2021-03-10 21:17:27,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:27,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:27,448 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:27,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072037068] [2021-03-10 21:17:27,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342794934] [2021-03-10 21:17:27,448 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:27,467 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:17:27,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:27,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:17:27,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:27,707 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:17:27,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:27,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-03-10 21:17:27,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030550558] [2021-03-10 21:17:27,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:17:27,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:27,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:17:27,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:17:27,707 INFO L87 Difference]: Start difference. First operand 7797 states and 24473 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2021-03-10 21:17:28,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:28,110 INFO L93 Difference]: Finished difference Result 7916 states and 24667 transitions. [2021-03-10 21:17:28,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:17:28,111 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 23 [2021-03-10 21:17:28,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:28,122 INFO L225 Difference]: With dead ends: 7916 [2021-03-10 21:17:28,123 INFO L226 Difference]: Without dead ends: 7903 [2021-03-10 21:17:28,123 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 413.5ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:17:28,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7903 states. [2021-03-10 21:17:28,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7903 to 7773. [2021-03-10 21:17:28,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7773 states, 7772 states have (on average 3.139475038600103) internal successors, (24400), 7772 states have internal predecessors, (24400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:28,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7773 states to 7773 states and 24400 transitions. [2021-03-10 21:17:28,234 INFO L78 Accepts]: Start accepts. Automaton has 7773 states and 24400 transitions. Word has length 23 [2021-03-10 21:17:28,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:28,234 INFO L480 AbstractCegarLoop]: Abstraction has 7773 states and 24400 transitions. [2021-03-10 21:17:28,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2021-03-10 21:17:28,235 INFO L276 IsEmpty]: Start isEmpty. Operand 7773 states and 24400 transitions. [2021-03-10 21:17:28,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:17:28,244 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:28,244 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:28,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable535 [2021-03-10 21:17:28,444 INFO L428 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:28,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:28,445 INFO L82 PathProgramCache]: Analyzing trace with hash -339895301, now seen corresponding path program 301 times [2021-03-10 21:17:28,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:28,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068785475] [2021-03-10 21:17:28,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:28,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:28,649 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:28,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068785475] [2021-03-10 21:17:28,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372655466] [2021-03-10 21:17:28,649 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:28,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:28,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:17:28,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:28,911 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:28,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:28,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-03-10 21:17:28,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311433467] [2021-03-10 21:17:28,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:17:28,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:28,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:17:28,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:17:28,912 INFO L87 Difference]: Start difference. First operand 7773 states and 24400 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:29,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:29,543 INFO L93 Difference]: Finished difference Result 8383 states and 25880 transitions. [2021-03-10 21:17:29,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:17:29,544 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:17:29,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:29,554 INFO L225 Difference]: With dead ends: 8383 [2021-03-10 21:17:29,554 INFO L226 Difference]: Without dead ends: 8366 [2021-03-10 21:17:29,555 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 461.1ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:17:29,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8366 states. [2021-03-10 21:17:29,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8366 to 8073. [2021-03-10 21:17:29,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8073 states, 8072 states have (on average 3.1385034687809714) internal successors, (25334), 8072 states have internal predecessors, (25334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:29,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8073 states to 8073 states and 25334 transitions. [2021-03-10 21:17:29,662 INFO L78 Accepts]: Start accepts. Automaton has 8073 states and 25334 transitions. Word has length 23 [2021-03-10 21:17:29,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:29,662 INFO L480 AbstractCegarLoop]: Abstraction has 8073 states and 25334 transitions. [2021-03-10 21:17:29,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:29,663 INFO L276 IsEmpty]: Start isEmpty. Operand 8073 states and 25334 transitions. [2021-03-10 21:17:29,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:17:29,672 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:29,672 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:29,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable538 [2021-03-10 21:17:29,872 INFO L428 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:29,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:29,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1274807423, now seen corresponding path program 302 times [2021-03-10 21:17:29,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:29,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602127428] [2021-03-10 21:17:29,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:29,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:30,106 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:30,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602127428] [2021-03-10 21:17:30,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318672155] [2021-03-10 21:17:30,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:30,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:17:30,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:30,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:17:30,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:30,341 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:30,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:30,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-03-10 21:17:30,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737901970] [2021-03-10 21:17:30,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:17:30,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:30,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:17:30,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:17:30,341 INFO L87 Difference]: Start difference. First operand 8073 states and 25334 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 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) [2021-03-10 21:17:30,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:30,891 INFO L93 Difference]: Finished difference Result 8381 states and 25825 transitions. [2021-03-10 21:17:30,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:17:30,892 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 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 23 [2021-03-10 21:17:30,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:30,904 INFO L225 Difference]: With dead ends: 8381 [2021-03-10 21:17:30,904 INFO L226 Difference]: Without dead ends: 8365 [2021-03-10 21:17:30,904 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 492.6ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:17:30,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8365 states. [2021-03-10 21:17:30,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8365 to 8044. [2021-03-10 21:17:31,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8044 states, 8043 states have (on average 3.134526917816735) internal successors, (25211), 8043 states have internal predecessors, (25211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:31,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8044 states to 8044 states and 25211 transitions. [2021-03-10 21:17:31,022 INFO L78 Accepts]: Start accepts. Automaton has 8044 states and 25211 transitions. Word has length 23 [2021-03-10 21:17:31,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:31,022 INFO L480 AbstractCegarLoop]: Abstraction has 8044 states and 25211 transitions. [2021-03-10 21:17:31,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 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) [2021-03-10 21:17:31,022 INFO L276 IsEmpty]: Start isEmpty. Operand 8044 states and 25211 transitions. [2021-03-10 21:17:31,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:17:31,032 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:31,032 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:31,232 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable541 [2021-03-10 21:17:31,232 INFO L428 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:31,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:31,232 INFO L82 PathProgramCache]: Analyzing trace with hash -804486405, now seen corresponding path program 303 times [2021-03-10 21:17:31,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:31,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594596779] [2021-03-10 21:17:31,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:31,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:31,406 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:31,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594596779] [2021-03-10 21:17:31,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268740620] [2021-03-10 21:17:31,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:31,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:17:31,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:31,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:17:31,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:31,702 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:31,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:31,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-03-10 21:17:31,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666170049] [2021-03-10 21:17:31,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:17:31,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:31,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:17:31,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:17:31,703 INFO L87 Difference]: Start difference. First operand 8044 states and 25211 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 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) [2021-03-10 21:17:32,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:32,432 INFO L93 Difference]: Finished difference Result 8378 states and 25745 transitions. [2021-03-10 21:17:32,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:17:32,434 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 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 23 [2021-03-10 21:17:32,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:32,446 INFO L225 Difference]: With dead ends: 8378 [2021-03-10 21:17:32,446 INFO L226 Difference]: Without dead ends: 8360 [2021-03-10 21:17:32,446 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 523.4ms TimeCoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:17:32,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8360 states. [2021-03-10 21:17:32,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8360 to 8008. [2021-03-10 21:17:32,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8008 states, 8007 states have (on average 3.129511677282378) internal successors, (25058), 8007 states have internal predecessors, (25058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:32,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8008 states to 8008 states and 25058 transitions. [2021-03-10 21:17:32,560 INFO L78 Accepts]: Start accepts. Automaton has 8008 states and 25058 transitions. Word has length 23 [2021-03-10 21:17:32,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:32,560 INFO L480 AbstractCegarLoop]: Abstraction has 8008 states and 25058 transitions. [2021-03-10 21:17:32,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 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) [2021-03-10 21:17:32,560 INFO L276 IsEmpty]: Start isEmpty. Operand 8008 states and 25058 transitions. [2021-03-10 21:17:32,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:17:32,568 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:32,568 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:32,769 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable544 [2021-03-10 21:17:32,769 INFO L428 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:32,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:32,769 INFO L82 PathProgramCache]: Analyzing trace with hash -838085633, now seen corresponding path program 304 times [2021-03-10 21:17:32,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:32,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776045358] [2021-03-10 21:17:32,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:32,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:33,025 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:33,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776045358] [2021-03-10 21:17:33,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693605637] [2021-03-10 21:17:33,025 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:33,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:17:33,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:33,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:17:33,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:33,333 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:33,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:33,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-03-10 21:17:33,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424598149] [2021-03-10 21:17:33,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:17:33,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:33,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:17:33,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:17:33,334 INFO L87 Difference]: Start difference. First operand 8008 states and 25058 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 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) [2021-03-10 21:17:34,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:34,015 INFO L93 Difference]: Finished difference Result 8369 states and 25633 transitions. [2021-03-10 21:17:34,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:17:34,016 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 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 23 [2021-03-10 21:17:34,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:34,028 INFO L225 Difference]: With dead ends: 8369 [2021-03-10 21:17:34,028 INFO L226 Difference]: Without dead ends: 8349 [2021-03-10 21:17:34,028 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 598.4ms TimeCoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:17:34,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8349 states. [2021-03-10 21:17:34,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8349 to 7964. [2021-03-10 21:17:34,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7964 states, 7963 states have (on average 3.126585457742057) internal successors, (24897), 7963 states have internal predecessors, (24897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:34,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7964 states to 7964 states and 24897 transitions. [2021-03-10 21:17:34,146 INFO L78 Accepts]: Start accepts. Automaton has 7964 states and 24897 transitions. Word has length 23 [2021-03-10 21:17:34,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:34,146 INFO L480 AbstractCegarLoop]: Abstraction has 7964 states and 24897 transitions. [2021-03-10 21:17:34,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 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) [2021-03-10 21:17:34,146 INFO L276 IsEmpty]: Start isEmpty. Operand 7964 states and 24897 transitions. [2021-03-10 21:17:34,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:17:34,155 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:34,155 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:34,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable547 [2021-03-10 21:17:34,356 INFO L428 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:34,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:34,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1879661701, now seen corresponding path program 305 times [2021-03-10 21:17:34,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:34,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925747278] [2021-03-10 21:17:34,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:34,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:34,589 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:34,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925747278] [2021-03-10 21:17:34,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346422819] [2021-03-10 21:17:34,589 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:34,608 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:17:34,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:34,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:17:34,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:34,817 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:34,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:34,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-03-10 21:17:34,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492722579] [2021-03-10 21:17:34,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:17:34,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:34,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:17:34,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:17:34,817 INFO L87 Difference]: Start difference. First operand 7964 states and 24897 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 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) [2021-03-10 21:17:35,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:35,662 INFO L93 Difference]: Finished difference Result 8358 states and 25520 transitions. [2021-03-10 21:17:35,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:17:35,663 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 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 23 [2021-03-10 21:17:35,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:35,673 INFO L225 Difference]: With dead ends: 8358 [2021-03-10 21:17:35,673 INFO L226 Difference]: Without dead ends: 8336 [2021-03-10 21:17:35,674 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 581.3ms TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:17:35,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8336 states. [2021-03-10 21:17:35,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8336 to 7922. [2021-03-10 21:17:35,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7922 states, 7921 states have (on average 3.1249842191642467) internal successors, (24753), 7921 states have internal predecessors, (24753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:35,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7922 states to 7922 states and 24753 transitions. [2021-03-10 21:17:35,771 INFO L78 Accepts]: Start accepts. Automaton has 7922 states and 24753 transitions. Word has length 23 [2021-03-10 21:17:35,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:35,771 INFO L480 AbstractCegarLoop]: Abstraction has 7922 states and 24753 transitions. [2021-03-10 21:17:35,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 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) [2021-03-10 21:17:35,771 INFO L276 IsEmpty]: Start isEmpty. Operand 7922 states and 24753 transitions. [2021-03-10 21:17:35,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:17:35,779 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:35,779 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:35,979 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,309 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:35,979 INFO L428 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:35,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:35,980 INFO L82 PathProgramCache]: Analyzing trace with hash 191218559, now seen corresponding path program 306 times [2021-03-10 21:17:35,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:35,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895095083] [2021-03-10 21:17:35,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:35,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:36,240 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:36,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895095083] [2021-03-10 21:17:36,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604910104] [2021-03-10 21:17:36,241 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:36,260 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:17:36,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:36,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:17:36,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:36,543 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:36,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:36,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-03-10 21:17:36,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422276547] [2021-03-10 21:17:36,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:17:36,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:36,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:17:36,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:17:36,544 INFO L87 Difference]: Start difference. First operand 7922 states and 24753 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 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) [2021-03-10 21:17:37,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:37,451 INFO L93 Difference]: Finished difference Result 8208 states and 25204 transitions. [2021-03-10 21:17:37,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:17:37,452 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 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 23 [2021-03-10 21:17:37,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:37,462 INFO L225 Difference]: With dead ends: 8208 [2021-03-10 21:17:37,463 INFO L226 Difference]: Without dead ends: 8184 [2021-03-10 21:17:37,463 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 660.7ms TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:17:37,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8184 states. [2021-03-10 21:17:37,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8184 to 7881. [2021-03-10 21:17:37,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7881 states, 7880 states have (on average 3.1266497461928933) internal successors, (24638), 7880 states have internal predecessors, (24638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:37,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7881 states to 7881 states and 24638 transitions. [2021-03-10 21:17:37,572 INFO L78 Accepts]: Start accepts. Automaton has 7881 states and 24638 transitions. Word has length 23 [2021-03-10 21:17:37,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:37,572 INFO L480 AbstractCegarLoop]: Abstraction has 7881 states and 24638 transitions. [2021-03-10 21:17:37,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 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) [2021-03-10 21:17:37,572 INFO L276 IsEmpty]: Start isEmpty. Operand 7881 states and 24638 transitions. [2021-03-10 21:17:37,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:17:37,581 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:37,581 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:37,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable553 [2021-03-10 21:17:37,782 INFO L428 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:37,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:37,782 INFO L82 PathProgramCache]: Analyzing trace with hash -36002821, now seen corresponding path program 307 times [2021-03-10 21:17:37,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:37,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424619043] [2021-03-10 21:17:37,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:37,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:37,983 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:37,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424619043] [2021-03-10 21:17:37,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544135478] [2021-03-10 21:17:37,983 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:38,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:38,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:17:38,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:38,256 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:38,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:38,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-03-10 21:17:38,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126068357] [2021-03-10 21:17:38,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:17:38,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:38,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:17:38,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:17:38,257 INFO L87 Difference]: Start difference. First operand 7881 states and 24638 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 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) [2021-03-10 21:17:39,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:39,191 INFO L93 Difference]: Finished difference Result 8087 states and 24955 transitions. [2021-03-10 21:17:39,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:17:39,193 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 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 23 [2021-03-10 21:17:39,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:39,204 INFO L225 Difference]: With dead ends: 8087 [2021-03-10 21:17:39,204 INFO L226 Difference]: Without dead ends: 8080 [2021-03-10 21:17:39,204 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 588.9ms TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:17:39,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8080 states. [2021-03-10 21:17:39,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8080 to 7893. [2021-03-10 21:17:39,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7893 states, 7892 states have (on average 3.124176381145464) internal successors, (24656), 7892 states have internal predecessors, (24656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:39,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7893 states to 7893 states and 24656 transitions. [2021-03-10 21:17:39,319 INFO L78 Accepts]: Start accepts. Automaton has 7893 states and 24656 transitions. Word has length 23 [2021-03-10 21:17:39,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:39,319 INFO L480 AbstractCegarLoop]: Abstraction has 7893 states and 24656 transitions. [2021-03-10 21:17:39,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 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) [2021-03-10 21:17:39,319 INFO L276 IsEmpty]: Start isEmpty. Operand 7893 states and 24656 transitions. [2021-03-10 21:17:39,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:17:39,328 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:39,328 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:39,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable556,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:39,529 INFO L428 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:39,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:39,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1252511357, now seen corresponding path program 308 times [2021-03-10 21:17:39,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:39,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757796593] [2021-03-10 21:17:39,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:39,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:39,738 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:39,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757796593] [2021-03-10 21:17:39,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520947375] [2021-03-10 21:17:39,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:17:39,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:17:39,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:39,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:17:39,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:40,099 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:40,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:40,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-03-10 21:17:40,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029490978] [2021-03-10 21:17:40,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:17:40,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:40,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:17:40,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:17:40,100 INFO L87 Difference]: Start difference. First operand 7893 states and 24656 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:40,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:40,588 INFO L93 Difference]: Finished difference Result 8261 states and 25496 transitions. [2021-03-10 21:17:40,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:17:40,588 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:17:40,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:40,600 INFO L225 Difference]: With dead ends: 8261 [2021-03-10 21:17:40,600 INFO L226 Difference]: Without dead ends: 8251 [2021-03-10 21:17:40,600 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 557.4ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:17:40,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8251 states. [2021-03-10 21:17:40,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8251 to 7953. [2021-03-10 21:17:40,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7953 states, 7952 states have (on average 3.1281438631790746) internal successors, (24875), 7952 states have internal predecessors, (24875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:40,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7953 states to 7953 states and 24875 transitions. [2021-03-10 21:17:40,715 INFO L78 Accepts]: Start accepts. Automaton has 7953 states and 24875 transitions. Word has length 23 [2021-03-10 21:17:40,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:40,715 INFO L480 AbstractCegarLoop]: Abstraction has 7953 states and 24875 transitions. [2021-03-10 21:17:40,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:40,715 INFO L276 IsEmpty]: Start isEmpty. Operand 7953 states and 24875 transitions. [2021-03-10 21:17:40,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:17:40,725 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:40,725 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:40,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable559 [2021-03-10 21:17:40,925 INFO L428 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:40,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:40,926 INFO L82 PathProgramCache]: Analyzing trace with hash 362191367, now seen corresponding path program 309 times [2021-03-10 21:17:40,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:40,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932851145] [2021-03-10 21:17:40,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:40,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:41,204 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:41,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932851145] [2021-03-10 21:17:41,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041989203] [2021-03-10 21:17:41,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:41,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:17:41,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:41,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:17:41,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:41,559 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:41,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:41,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-03-10 21:17:41,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463110849] [2021-03-10 21:17:41,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:17:41,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:41,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:17:41,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:17:41,560 INFO L87 Difference]: Start difference. First operand 7953 states and 24875 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2021-03-10 21:17:42,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:42,011 INFO L93 Difference]: Finished difference Result 8243 states and 25454 transitions. [2021-03-10 21:17:42,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:17:42,012 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 23 [2021-03-10 21:17:42,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:42,024 INFO L225 Difference]: With dead ends: 8243 [2021-03-10 21:17:42,024 INFO L226 Difference]: Without dead ends: 8236 [2021-03-10 21:17:42,024 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 590.3ms TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:17:42,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8236 states. [2021-03-10 21:17:42,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8236 to 7951. [2021-03-10 21:17:42,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7951 states, 7950 states have (on average 3.127924528301887) internal successors, (24867), 7950 states have internal predecessors, (24867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:42,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7951 states to 7951 states and 24867 transitions. [2021-03-10 21:17:42,141 INFO L78 Accepts]: Start accepts. Automaton has 7951 states and 24867 transitions. Word has length 23 [2021-03-10 21:17:42,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:42,141 INFO L480 AbstractCegarLoop]: Abstraction has 7951 states and 24867 transitions. [2021-03-10 21:17:42,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2021-03-10 21:17:42,141 INFO L276 IsEmpty]: Start isEmpty. Operand 7951 states and 24867 transitions. [2021-03-10 21:17:42,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:17:42,150 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:42,150 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:42,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable562 [2021-03-10 21:17:42,351 INFO L428 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:42,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:42,351 INFO L82 PathProgramCache]: Analyzing trace with hash -681056551, now seen corresponding path program 310 times [2021-03-10 21:17:42,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:42,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044980728] [2021-03-10 21:17:42,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:42,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:42,578 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:42,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044980728] [2021-03-10 21:17:42,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780678962] [2021-03-10 21:17:42,578 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:42,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:17:42,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:42,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:17:42,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:42,882 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:42,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:42,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-03-10 21:17:42,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50772936] [2021-03-10 21:17:42,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:17:42,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:42,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:17:42,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:17:42,883 INFO L87 Difference]: Start difference. First operand 7951 states and 24867 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:43,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:43,408 INFO L93 Difference]: Finished difference Result 8146 states and 25212 transitions. [2021-03-10 21:17:43,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:17:43,409 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:17:43,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:43,423 INFO L225 Difference]: With dead ends: 8146 [2021-03-10 21:17:43,423 INFO L226 Difference]: Without dead ends: 8139 [2021-03-10 21:17:43,424 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 534.1ms TimeCoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:17:43,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8139 states. [2021-03-10 21:17:43,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8139 to 7950. [2021-03-10 21:17:43,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7950 states, 7949 states have (on average 3.127940621461819) internal successors, (24864), 7949 states have internal predecessors, (24864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:43,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7950 states to 7950 states and 24864 transitions. [2021-03-10 21:17:43,543 INFO L78 Accepts]: Start accepts. Automaton has 7950 states and 24864 transitions. Word has length 23 [2021-03-10 21:17:43,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:43,543 INFO L480 AbstractCegarLoop]: Abstraction has 7950 states and 24864 transitions. [2021-03-10 21:17:43,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:43,543 INFO L276 IsEmpty]: Start isEmpty. Operand 7950 states and 24864 transitions. [2021-03-10 21:17:43,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:17:43,553 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:43,553 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:43,754 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable565 [2021-03-10 21:17:43,754 INFO L428 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:43,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:43,754 INFO L82 PathProgramCache]: Analyzing trace with hash 521161979, now seen corresponding path program 311 times [2021-03-10 21:17:43,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:43,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130408006] [2021-03-10 21:17:43,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:43,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:44,011 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:44,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130408006] [2021-03-10 21:17:44,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398314452] [2021-03-10 21:17:44,012 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:44,032 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:17:44,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:44,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:17:44,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:44,344 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:44,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:44,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-03-10 21:17:44,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98155266] [2021-03-10 21:17:44,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:17:44,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:44,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:17:44,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:17:44,345 INFO L87 Difference]: Start difference. First operand 7950 states and 24864 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:44,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:44,811 INFO L93 Difference]: Finished difference Result 8403 states and 25974 transitions. [2021-03-10 21:17:44,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:17:44,812 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:17:44,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:44,822 INFO L225 Difference]: With dead ends: 8403 [2021-03-10 21:17:44,822 INFO L226 Difference]: Without dead ends: 8393 [2021-03-10 21:17:44,822 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 554.9ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:17:44,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8393 states. [2021-03-10 21:17:44,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8393 to 8044. [2021-03-10 21:17:44,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8044 states, 8043 states have (on average 3.133034937212483) internal successors, (25199), 8043 states have internal predecessors, (25199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:44,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8044 states to 8044 states and 25199 transitions. [2021-03-10 21:17:44,944 INFO L78 Accepts]: Start accepts. Automaton has 8044 states and 25199 transitions. Word has length 23 [2021-03-10 21:17:44,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:44,944 INFO L480 AbstractCegarLoop]: Abstraction has 8044 states and 25199 transitions. [2021-03-10 21:17:44,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:44,944 INFO L276 IsEmpty]: Start isEmpty. Operand 8044 states and 25199 transitions. [2021-03-10 21:17:44,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:17:44,954 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:44,954 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:45,154 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable568,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:45,154 INFO L428 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:45,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:45,155 INFO L82 PathProgramCache]: Analyzing trace with hash 2135864703, now seen corresponding path program 312 times [2021-03-10 21:17:45,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:45,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315832705] [2021-03-10 21:17:45,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:45,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:45,402 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:45,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315832705] [2021-03-10 21:17:45,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745590163] [2021-03-10 21:17:45,402 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:45,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:17:45,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:45,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:17:45,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:45,700 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:45,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:45,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-03-10 21:17:45,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256990758] [2021-03-10 21:17:45,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:17:45,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:45,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:17:45,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:17:45,701 INFO L87 Difference]: Start difference. First operand 8044 states and 25199 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:46,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:46,105 INFO L93 Difference]: Finished difference Result 8384 states and 25924 transitions. [2021-03-10 21:17:46,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:17:46,106 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:17:46,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:46,118 INFO L225 Difference]: With dead ends: 8384 [2021-03-10 21:17:46,118 INFO L226 Difference]: Without dead ends: 8377 [2021-03-10 21:17:46,118 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 530.9ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:17:46,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8377 states. [2021-03-10 21:17:46,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8377 to 8041. [2021-03-10 21:17:46,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8041 states, 8040 states have (on average 3.1327114427860696) internal successors, (25187), 8040 states have internal predecessors, (25187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:46,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8041 states to 8041 states and 25187 transitions. [2021-03-10 21:17:46,239 INFO L78 Accepts]: Start accepts. Automaton has 8041 states and 25187 transitions. Word has length 23 [2021-03-10 21:17:46,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:46,239 INFO L480 AbstractCegarLoop]: Abstraction has 8041 states and 25187 transitions. [2021-03-10 21:17:46,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:46,239 INFO L276 IsEmpty]: Start isEmpty. Operand 8041 states and 25187 transitions. [2021-03-10 21:17:46,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:17:46,249 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:46,249 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:46,449 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable571,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:46,450 INFO L428 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:46,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:46,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1092616785, now seen corresponding path program 313 times [2021-03-10 21:17:46,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:46,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970941603] [2021-03-10 21:17:46,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:46,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:46,696 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:46,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970941603] [2021-03-10 21:17:46,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642643267] [2021-03-10 21:17:46,697 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:46,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:46,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:17:46,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:47,072 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:47,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:47,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-03-10 21:17:47,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371688731] [2021-03-10 21:17:47,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:17:47,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:47,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:17:47,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:17:47,073 INFO L87 Difference]: Start difference. First operand 8041 states and 25187 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:47,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:47,613 INFO L93 Difference]: Finished difference Result 8323 states and 25762 transitions. [2021-03-10 21:17:47,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:17:47,614 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:17:47,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:47,624 INFO L225 Difference]: With dead ends: 8323 [2021-03-10 21:17:47,624 INFO L226 Difference]: Without dead ends: 8310 [2021-03-10 21:17:47,624 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 617.0ms TimeCoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:17:47,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8310 states. [2021-03-10 21:17:47,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8310 to 8045. [2021-03-10 21:17:47,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8045 states, 8044 states have (on average 3.131775236200895) internal successors, (25192), 8044 states have internal predecessors, (25192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:47,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8045 states to 8045 states and 25192 transitions. [2021-03-10 21:17:47,723 INFO L78 Accepts]: Start accepts. Automaton has 8045 states and 25192 transitions. Word has length 23 [2021-03-10 21:17:47,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:47,723 INFO L480 AbstractCegarLoop]: Abstraction has 8045 states and 25192 transitions. [2021-03-10 21:17:47,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:47,723 INFO L276 IsEmpty]: Start isEmpty. Operand 8045 states and 25192 transitions. [2021-03-10 21:17:47,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:17:47,733 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:47,733 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:47,933 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable574 [2021-03-10 21:17:47,933 INFO L428 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:47,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:47,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1627846587, now seen corresponding path program 314 times [2021-03-10 21:17:47,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:47,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714783164] [2021-03-10 21:17:47,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:47,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:48,207 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:48,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714783164] [2021-03-10 21:17:48,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683012609] [2021-03-10 21:17:48,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:48,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:17:48,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:48,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:17:48,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:48,549 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:48,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:48,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-03-10 21:17:48,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122886011] [2021-03-10 21:17:48,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:17:48,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:48,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:17:48,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:17:48,550 INFO L87 Difference]: Start difference. First operand 8045 states and 25192 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:49,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:49,210 INFO L93 Difference]: Finished difference Result 8231 states and 25513 transitions. [2021-03-10 21:17:49,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:17:49,211 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:17:49,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:49,221 INFO L225 Difference]: With dead ends: 8231 [2021-03-10 21:17:49,221 INFO L226 Difference]: Without dead ends: 8224 [2021-03-10 21:17:49,221 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 633.4ms TimeCoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:17:49,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8224 states. [2021-03-10 21:17:49,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8224 to 8043. [2021-03-10 21:17:49,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8043 states, 8042 states have (on average 3.1318080079582193) internal successors, (25186), 8042 states have internal predecessors, (25186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:49,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8043 states to 8043 states and 25186 transitions. [2021-03-10 21:17:49,324 INFO L78 Accepts]: Start accepts. Automaton has 8043 states and 25186 transitions. Word has length 23 [2021-03-10 21:17:49,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:49,324 INFO L480 AbstractCegarLoop]: Abstraction has 8043 states and 25186 transitions. [2021-03-10 21:17:49,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:49,324 INFO L276 IsEmpty]: Start isEmpty. Operand 8043 states and 25186 transitions. [2021-03-10 21:17:49,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:17:49,332 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:49,332 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:49,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable577,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:49,532 INFO L428 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:49,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:49,533 INFO L82 PathProgramCache]: Analyzing trace with hash -108653125, now seen corresponding path program 315 times [2021-03-10 21:17:49,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:49,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015275327] [2021-03-10 21:17:49,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:49,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:49,797 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:49,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015275327] [2021-03-10 21:17:49,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373029689] [2021-03-10 21:17:49,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:49,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:17:49,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:49,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:17:49,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:50,170 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:17:50,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:50,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-03-10 21:17:50,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077268050] [2021-03-10 21:17:50,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:17:50,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:50,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:17:50,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:17:50,171 INFO L87 Difference]: Start difference. First operand 8043 states and 25186 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:50,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:50,738 INFO L93 Difference]: Finished difference Result 8179 states and 25417 transitions. [2021-03-10 21:17:50,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:17:50,740 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:17:50,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:50,752 INFO L225 Difference]: With dead ends: 8179 [2021-03-10 21:17:50,753 INFO L226 Difference]: Without dead ends: 8163 [2021-03-10 21:17:50,753 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 649.4ms TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:17:50,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8163 states. [2021-03-10 21:17:50,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8163 to 8022. [2021-03-10 21:17:50,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8022 states, 8021 states have (on average 3.132153098117442) internal successors, (25123), 8021 states have internal predecessors, (25123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:50,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8022 states to 8022 states and 25123 transitions. [2021-03-10 21:17:50,877 INFO L78 Accepts]: Start accepts. Automaton has 8022 states and 25123 transitions. Word has length 23 [2021-03-10 21:17:50,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:50,877 INFO L480 AbstractCegarLoop]: Abstraction has 8022 states and 25123 transitions. [2021-03-10 21:17:50,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:50,877 INFO L276 IsEmpty]: Start isEmpty. Operand 8022 states and 25123 transitions. [2021-03-10 21:17:50,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:17:50,888 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:50,888 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:51,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,319 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:51,088 INFO L428 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:51,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:51,089 INFO L82 PathProgramCache]: Analyzing trace with hash -329539453, now seen corresponding path program 316 times [2021-03-10 21:17:51,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:51,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551026737] [2021-03-10 21:17:51,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:51,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:51,300 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:51,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551026737] [2021-03-10 21:17:51,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105968136] [2021-03-10 21:17:51,300 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 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 [2021-03-10 21:17:51,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:17:51,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:51,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:17:51,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:51,616 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:51,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:51,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-03-10 21:17:51,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444144742] [2021-03-10 21:17:51,617 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:17:51,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:51,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:17:51,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:17:51,617 INFO L87 Difference]: Start difference. First operand 8022 states and 25123 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:52,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:52,206 INFO L93 Difference]: Finished difference Result 8489 states and 26222 transitions. [2021-03-10 21:17:52,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:17:52,208 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:17:52,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:52,219 INFO L225 Difference]: With dead ends: 8489 [2021-03-10 21:17:52,220 INFO L226 Difference]: Without dead ends: 8479 [2021-03-10 21:17:52,220 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 515.2ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:17:52,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8479 states. [2021-03-10 21:17:52,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8479 to 8124. [2021-03-10 21:17:52,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8124 states, 8123 states have (on average 3.1368952357503384) internal successors, (25481), 8123 states have internal predecessors, (25481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:52,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8124 states to 8124 states and 25481 transitions. [2021-03-10 21:17:52,321 INFO L78 Accepts]: Start accepts. Automaton has 8124 states and 25481 transitions. Word has length 23 [2021-03-10 21:17:52,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:52,321 INFO L480 AbstractCegarLoop]: Abstraction has 8124 states and 25481 transitions. [2021-03-10 21:17:52,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:52,321 INFO L276 IsEmpty]: Start isEmpty. Operand 8124 states and 25481 transitions. [2021-03-10 21:17:52,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:17:52,329 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:52,329 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:52,530 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable583,320 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:52,530 INFO L428 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:52,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:52,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1285163271, now seen corresponding path program 317 times [2021-03-10 21:17:52,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:52,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798332858] [2021-03-10 21:17:52,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:52,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:52,783 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:52,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798332858] [2021-03-10 21:17:52,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084167726] [2021-03-10 21:17:52,784 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:52,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:17:52,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:52,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:17:52,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:53,095 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:53,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:53,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-03-10 21:17:53,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711007104] [2021-03-10 21:17:53,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:17:53,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:53,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:17:53,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:17:53,096 INFO L87 Difference]: Start difference. First operand 8124 states and 25481 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:53,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:53,519 INFO L93 Difference]: Finished difference Result 8470 states and 26170 transitions. [2021-03-10 21:17:53,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:17:53,520 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:17:53,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:53,532 INFO L225 Difference]: With dead ends: 8470 [2021-03-10 21:17:53,533 INFO L226 Difference]: Without dead ends: 8463 [2021-03-10 21:17:53,533 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 512.8ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:17:53,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8463 states. [2021-03-10 21:17:53,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8463 to 8120. [2021-03-10 21:17:53,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8120 states, 8119 states have (on average 3.1364700086217514) internal successors, (25465), 8119 states have internal predecessors, (25465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:53,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8120 states to 8120 states and 25465 transitions. [2021-03-10 21:17:53,647 INFO L78 Accepts]: Start accepts. Automaton has 8120 states and 25465 transitions. Word has length 23 [2021-03-10 21:17:53,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:53,647 INFO L480 AbstractCegarLoop]: Abstraction has 8120 states and 25465 transitions. [2021-03-10 21:17:53,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:53,648 INFO L276 IsEmpty]: Start isEmpty. Operand 8120 states and 25465 transitions. [2021-03-10 21:17:53,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:17:53,657 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:53,657 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:53,857 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 321 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2021-03-10 21:17:53,857 INFO L428 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:53,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:53,858 INFO L82 PathProgramCache]: Analyzing trace with hash 241915353, now seen corresponding path program 318 times [2021-03-10 21:17:53,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:53,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293885078] [2021-03-10 21:17:53,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:53,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:54,115 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:54,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293885078] [2021-03-10 21:17:54,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568063332] [2021-03-10 21:17:54,116 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:54,136 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:17:54,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:54,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:17:54,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:54,464 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:54,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:54,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-03-10 21:17:54,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530598834] [2021-03-10 21:17:54,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:17:54,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:54,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:17:54,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:17:54,465 INFO L87 Difference]: Start difference. First operand 8120 states and 25465 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:54,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:54,993 INFO L93 Difference]: Finished difference Result 8466 states and 26134 transitions. [2021-03-10 21:17:54,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:17:54,994 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:17:54,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:55,007 INFO L225 Difference]: With dead ends: 8466 [2021-03-10 21:17:55,007 INFO L226 Difference]: Without dead ends: 8453 [2021-03-10 21:17:55,007 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 589.4ms TimeCoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:17:55,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8453 states. [2021-03-10 21:17:55,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8453 to 8117. [2021-03-10 21:17:55,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8117 states, 8116 states have (on average 3.13590438639724) internal successors, (25451), 8116 states have internal predecessors, (25451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:55,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8117 states to 8117 states and 25451 transitions. [2021-03-10 21:17:55,129 INFO L78 Accepts]: Start accepts. Automaton has 8117 states and 25451 transitions. Word has length 23 [2021-03-10 21:17:55,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:55,129 INFO L480 AbstractCegarLoop]: Abstraction has 8117 states and 25451 transitions. [2021-03-10 21:17:55,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:55,129 INFO L276 IsEmpty]: Start isEmpty. Operand 8117 states and 25451 transitions. [2021-03-10 21:17:55,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:17:55,139 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:55,139 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:55,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable589 [2021-03-10 21:17:55,339 INFO L428 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:55,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:55,340 INFO L82 PathProgramCache]: Analyzing trace with hash 777145155, now seen corresponding path program 319 times [2021-03-10 21:17:55,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:55,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066152311] [2021-03-10 21:17:55,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:55,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:55,592 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:55,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066152311] [2021-03-10 21:17:55,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879583349] [2021-03-10 21:17:55,592 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:55,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:55,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:17:55,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:55,805 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:55,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:55,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-03-10 21:17:55,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745804267] [2021-03-10 21:17:55,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:17:55,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:55,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:17:55,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:17:55,806 INFO L87 Difference]: Start difference. First operand 8117 states and 25451 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:56,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:56,590 INFO L93 Difference]: Finished difference Result 8405 states and 25973 transitions. [2021-03-10 21:17:56,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:17:56,591 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:17:56,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:56,603 INFO L225 Difference]: With dead ends: 8405 [2021-03-10 21:17:56,603 INFO L226 Difference]: Without dead ends: 8389 [2021-03-10 21:17:56,604 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 546.1ms TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:17:56,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8389 states. [2021-03-10 21:17:56,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8389 to 8120. [2021-03-10 21:17:56,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8120 states, 8119 states have (on average 3.134745658332307) internal successors, (25451), 8119 states have internal predecessors, (25451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:56,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8120 states to 8120 states and 25451 transitions. [2021-03-10 21:17:56,722 INFO L78 Accepts]: Start accepts. Automaton has 8120 states and 25451 transitions. Word has length 23 [2021-03-10 21:17:56,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:56,722 INFO L480 AbstractCegarLoop]: Abstraction has 8120 states and 25451 transitions. [2021-03-10 21:17:56,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:56,722 INFO L276 IsEmpty]: Start isEmpty. Operand 8120 states and 25451 transitions. [2021-03-10 21:17:56,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:17:56,731 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:56,731 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:56,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:56,932 INFO L428 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:56,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:56,932 INFO L82 PathProgramCache]: Analyzing trace with hash 189399833, now seen corresponding path program 320 times [2021-03-10 21:17:56,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:56,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776290736] [2021-03-10 21:17:56,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:56,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:57,229 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:57,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776290736] [2021-03-10 21:17:57,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92796575] [2021-03-10 21:17:57,230 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 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 [2021-03-10 21:17:57,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:17:57,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:57,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:17:57,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:57,498 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:57,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:57,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-03-10 21:17:57,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431608641] [2021-03-10 21:17:57,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:17:57,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:57,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:17:57,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:17:57,499 INFO L87 Difference]: Start difference. First operand 8120 states and 25451 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:58,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:58,222 INFO L93 Difference]: Finished difference Result 8334 states and 25817 transitions. [2021-03-10 21:17:58,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:17:58,223 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:17:58,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:58,235 INFO L225 Difference]: With dead ends: 8334 [2021-03-10 21:17:58,236 INFO L226 Difference]: Without dead ends: 8327 [2021-03-10 21:17:58,236 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 634.8ms TimeCoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:17:58,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8327 states. [2021-03-10 21:17:58,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8327 to 8117. [2021-03-10 21:17:58,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8117 states, 8116 states have (on average 3.1347954657466732) internal successors, (25442), 8116 states have internal predecessors, (25442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:58,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8117 states to 8117 states and 25442 transitions. [2021-03-10 21:17:58,351 INFO L78 Accepts]: Start accepts. Automaton has 8117 states and 25442 transitions. Word has length 23 [2021-03-10 21:17:58,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:58,352 INFO L480 AbstractCegarLoop]: Abstraction has 8117 states and 25442 transitions. [2021-03-10 21:17:58,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:58,352 INFO L276 IsEmpty]: Start isEmpty. Operand 8117 states and 25442 transitions. [2021-03-10 21:17:58,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:17:58,361 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:58,361 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:58,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable595 [2021-03-10 21:17:58,562 INFO L428 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:58,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:58,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1894430651, now seen corresponding path program 321 times [2021-03-10 21:17:58,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:58,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657382070] [2021-03-10 21:17:58,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:58,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:58,809 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:58,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657382070] [2021-03-10 21:17:58,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291178519] [2021-03-10 21:17:58,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:58,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:17:58,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:58,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:17:58,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:59,188 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:17:59,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:59,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-03-10 21:17:59,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627646165] [2021-03-10 21:17:59,188 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:17:59,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:59,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:17:59,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:17:59,189 INFO L87 Difference]: Start difference. First operand 8117 states and 25442 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:59,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:59,810 INFO L93 Difference]: Finished difference Result 8376 states and 25895 transitions. [2021-03-10 21:17:59,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:17:59,810 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:17:59,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:59,821 INFO L225 Difference]: With dead ends: 8376 [2021-03-10 21:17:59,821 INFO L226 Difference]: Without dead ends: 8360 [2021-03-10 21:17:59,821 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 642.3ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:17:59,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8360 states. [2021-03-10 21:17:59,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8360 to 8101. [2021-03-10 21:17:59,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8101 states, 8100 states have (on average 3.1339506172839506) internal successors, (25385), 8100 states have internal predecessors, (25385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:59,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8101 states to 8101 states and 25385 transitions. [2021-03-10 21:17:59,917 INFO L78 Accepts]: Start accepts. Automaton has 8101 states and 25385 transitions. Word has length 23 [2021-03-10 21:17:59,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:59,917 INFO L480 AbstractCegarLoop]: Abstraction has 8101 states and 25385 transitions. [2021-03-10 21:17:59,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:59,917 INFO L276 IsEmpty]: Start isEmpty. Operand 8101 states and 25385 transitions. [2021-03-10 21:17:59,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:17:59,925 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:59,925 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:00,126 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-03-10 21:18:00,126 INFO L428 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:00,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:00,126 INFO L82 PathProgramCache]: Analyzing trace with hash -2102483687, now seen corresponding path program 322 times [2021-03-10 21:18:00,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:00,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096066603] [2021-03-10 21:18:00,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:00,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:00,450 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:00,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096066603] [2021-03-10 21:18:00,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583497047] [2021-03-10 21:18:00,451 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:00,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:18:00,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:00,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:18:00,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:00,838 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:18:00,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:00,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-03-10 21:18:00,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416527269] [2021-03-10 21:18:00,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:18:00,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:00,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:18:00,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:18:00,839 INFO L87 Difference]: Start difference. First operand 8101 states and 25385 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:01,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:01,517 INFO L93 Difference]: Finished difference Result 8270 states and 25679 transitions. [2021-03-10 21:18:01,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:18:01,518 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:18:01,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:01,531 INFO L225 Difference]: With dead ends: 8270 [2021-03-10 21:18:01,531 INFO L226 Difference]: Without dead ends: 8251 [2021-03-10 21:18:01,531 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 723.3ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:18:01,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8251 states. [2021-03-10 21:18:01,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8251 to 8085. [2021-03-10 21:18:01,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8085 states, 8084 states have (on average 3.13421573478476) internal successors, (25337), 8084 states have internal predecessors, (25337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:01,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8085 states to 8085 states and 25337 transitions. [2021-03-10 21:18:01,671 INFO L78 Accepts]: Start accepts. Automaton has 8085 states and 25337 transitions. Word has length 23 [2021-03-10 21:18:01,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:01,671 INFO L480 AbstractCegarLoop]: Abstraction has 8085 states and 25337 transitions. [2021-03-10 21:18:01,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:01,672 INFO L276 IsEmpty]: Start isEmpty. Operand 8085 states and 25337 transitions. [2021-03-10 21:18:01,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:18:01,681 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:01,681 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:01,881 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable601 [2021-03-10 21:18:01,882 INFO L428 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:01,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:01,882 INFO L82 PathProgramCache]: Analyzing trace with hash -931480069, now seen corresponding path program 323 times [2021-03-10 21:18:01,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:01,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130478941] [2021-03-10 21:18:01,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:01,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:02,162 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:02,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130478941] [2021-03-10 21:18:02,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802982078] [2021-03-10 21:18:02,162 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:18:02,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:18:02,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:02,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:18:02,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:02,376 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:02,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:02,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-03-10 21:18:02,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736865841] [2021-03-10 21:18:02,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:18:02,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:02,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:18:02,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:18:02,377 INFO L87 Difference]: Start difference. First operand 8085 states and 25337 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 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) [2021-03-10 21:18:02,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:02,934 INFO L93 Difference]: Finished difference Result 8595 states and 26485 transitions. [2021-03-10 21:18:02,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:18:02,935 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 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 23 [2021-03-10 21:18:02,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:02,947 INFO L225 Difference]: With dead ends: 8595 [2021-03-10 21:18:02,948 INFO L226 Difference]: Without dead ends: 8585 [2021-03-10 21:18:02,948 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 502.1ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:18:02,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8585 states. [2021-03-10 21:18:03,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8585 to 8181. [2021-03-10 21:18:03,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8181 states, 8180 states have (on average 3.1383863080684598) internal successors, (25672), 8180 states have internal predecessors, (25672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:03,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8181 states to 8181 states and 25672 transitions. [2021-03-10 21:18:03,077 INFO L78 Accepts]: Start accepts. Automaton has 8181 states and 25672 transitions. Word has length 23 [2021-03-10 21:18:03,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:03,077 INFO L480 AbstractCegarLoop]: Abstraction has 8181 states and 25672 transitions. [2021-03-10 21:18:03,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 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) [2021-03-10 21:18:03,077 INFO L276 IsEmpty]: Start isEmpty. Operand 8181 states and 25672 transitions. [2021-03-10 21:18:03,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:18:03,087 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:03,087 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:03,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable604,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:03,287 INFO L428 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:03,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:03,288 INFO L82 PathProgramCache]: Analyzing trace with hash 683222655, now seen corresponding path program 324 times [2021-03-10 21:18:03,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:03,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555526] [2021-03-10 21:18:03,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:03,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:03,491 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:03,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555526] [2021-03-10 21:18:03,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503046922] [2021-03-10 21:18:03,491 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:03,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:18:03,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:03,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:18:03,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:03,800 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:03,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:03,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-03-10 21:18:03,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944252701] [2021-03-10 21:18:03,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:18:03,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:03,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:18:03,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:18:03,801 INFO L87 Difference]: Start difference. First operand 8181 states and 25672 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:04,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:04,390 INFO L93 Difference]: Finished difference Result 8579 states and 26445 transitions. [2021-03-10 21:18:04,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:18:04,391 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:18:04,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:04,401 INFO L225 Difference]: With dead ends: 8579 [2021-03-10 21:18:04,402 INFO L226 Difference]: Without dead ends: 8572 [2021-03-10 21:18:04,402 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 508.0ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:18:04,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8572 states. [2021-03-10 21:18:04,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8572 to 8170. [2021-03-10 21:18:04,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8170 states, 8169 states have (on average 3.138082996694822) internal successors, (25635), 8169 states have internal predecessors, (25635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:04,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8170 states to 8170 states and 25635 transitions. [2021-03-10 21:18:04,499 INFO L78 Accepts]: Start accepts. Automaton has 8170 states and 25635 transitions. Word has length 23 [2021-03-10 21:18:04,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:04,499 INFO L480 AbstractCegarLoop]: Abstraction has 8170 states and 25635 transitions. [2021-03-10 21:18:04,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:04,499 INFO L276 IsEmpty]: Start isEmpty. Operand 8170 states and 25635 transitions. [2021-03-10 21:18:04,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:18:04,507 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:04,507 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:04,707 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable607,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:04,708 INFO L428 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:04,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:04,708 INFO L82 PathProgramCache]: Analyzing trace with hash -360025263, now seen corresponding path program 325 times [2021-03-10 21:18:04,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:04,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106709390] [2021-03-10 21:18:04,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:04,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:04,971 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:04,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106709390] [2021-03-10 21:18:04,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922184257] [2021-03-10 21:18:04,972 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:18:04,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:04,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:18:04,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:05,327 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:05,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:05,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-03-10 21:18:05,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105620436] [2021-03-10 21:18:05,328 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:18:05,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:05,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:18:05,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:18:05,328 INFO L87 Difference]: Start difference. First operand 8170 states and 25635 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 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) [2021-03-10 21:18:05,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:05,878 INFO L93 Difference]: Finished difference Result 8583 states and 26428 transitions. [2021-03-10 21:18:05,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:18:05,879 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 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 23 [2021-03-10 21:18:05,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:05,891 INFO L225 Difference]: With dead ends: 8583 [2021-03-10 21:18:05,891 INFO L226 Difference]: Without dead ends: 8570 [2021-03-10 21:18:05,892 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 611.5ms TimeCoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:18:05,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8570 states. [2021-03-10 21:18:05,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8570 to 8166. [2021-03-10 21:18:05,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8166 states, 8165 states have (on average 3.1375382731169625) internal successors, (25618), 8165 states have internal predecessors, (25618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:06,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8166 states to 8166 states and 25618 transitions. [2021-03-10 21:18:06,015 INFO L78 Accepts]: Start accepts. Automaton has 8166 states and 25618 transitions. Word has length 23 [2021-03-10 21:18:06,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:06,015 INFO L480 AbstractCegarLoop]: Abstraction has 8166 states and 25618 transitions. [2021-03-10 21:18:06,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 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) [2021-03-10 21:18:06,015 INFO L276 IsEmpty]: Start isEmpty. Operand 8166 states and 25618 transitions. [2021-03-10 21:18:06,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:18:06,025 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:06,025 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:06,225 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable610 [2021-03-10 21:18:06,225 INFO L428 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:06,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:06,226 INFO L82 PathProgramCache]: Analyzing trace with hash 175204539, now seen corresponding path program 326 times [2021-03-10 21:18:06,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:06,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978232939] [2021-03-10 21:18:06,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:06,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:06,475 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:06,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978232939] [2021-03-10 21:18:06,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215989936] [2021-03-10 21:18:06,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:06,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:18:06,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:06,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:18:06,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:06,714 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:06,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:06,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-03-10 21:18:06,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601870035] [2021-03-10 21:18:06,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:18:06,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:06,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:18:06,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:18:06,714 INFO L87 Difference]: Start difference. First operand 8166 states and 25618 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 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) [2021-03-10 21:18:07,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:07,502 INFO L93 Difference]: Finished difference Result 8591 states and 26411 transitions. [2021-03-10 21:18:07,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:18:07,503 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 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 23 [2021-03-10 21:18:07,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:07,516 INFO L225 Difference]: With dead ends: 8591 [2021-03-10 21:18:07,516 INFO L226 Difference]: Without dead ends: 8575 [2021-03-10 21:18:07,516 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 557.1ms TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:18:07,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8575 states. [2021-03-10 21:18:07,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8575 to 8162. [2021-03-10 21:18:07,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8162 states, 8161 states have (on average 3.1371155495650043) internal successors, (25602), 8161 states have internal predecessors, (25602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:07,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8162 states to 8162 states and 25602 transitions. [2021-03-10 21:18:07,639 INFO L78 Accepts]: Start accepts. Automaton has 8162 states and 25602 transitions. Word has length 23 [2021-03-10 21:18:07,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:07,640 INFO L480 AbstractCegarLoop]: Abstraction has 8162 states and 25602 transitions. [2021-03-10 21:18:07,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 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) [2021-03-10 21:18:07,640 INFO L276 IsEmpty]: Start isEmpty. Operand 8162 states and 25602 transitions. [2021-03-10 21:18:07,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:18:07,650 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:07,650 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:07,850 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable613 [2021-03-10 21:18:07,850 INFO L428 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:07,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:07,850 INFO L82 PathProgramCache]: Analyzing trace with hash -412540783, now seen corresponding path program 327 times [2021-03-10 21:18:07,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:07,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290156951] [2021-03-10 21:18:07,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:07,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:08,134 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:08,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290156951] [2021-03-10 21:18:08,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673743690] [2021-03-10 21:18:08,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:08,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:18:08,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:08,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:18:08,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:08,469 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:08,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:08,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-03-10 21:18:08,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635393790] [2021-03-10 21:18:08,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:18:08,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:08,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:18:08,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:18:08,469 INFO L87 Difference]: Start difference. First operand 8162 states and 25602 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 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) [2021-03-10 21:18:09,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:09,285 INFO L93 Difference]: Finished difference Result 8522 states and 26260 transitions. [2021-03-10 21:18:09,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:18:09,286 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 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 23 [2021-03-10 21:18:09,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:09,298 INFO L225 Difference]: With dead ends: 8522 [2021-03-10 21:18:09,298 INFO L226 Difference]: Without dead ends: 8503 [2021-03-10 21:18:09,298 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 698.0ms TimeCoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:18:09,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8503 states. [2021-03-10 21:18:09,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8503 to 8158. [2021-03-10 21:18:09,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8158 states, 8157 states have (on average 3.136815005516734) internal successors, (25587), 8157 states have internal predecessors, (25587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:09,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8158 states to 8158 states and 25587 transitions. [2021-03-10 21:18:09,421 INFO L78 Accepts]: Start accepts. Automaton has 8158 states and 25587 transitions. Word has length 23 [2021-03-10 21:18:09,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:09,421 INFO L480 AbstractCegarLoop]: Abstraction has 8158 states and 25587 transitions. [2021-03-10 21:18:09,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 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) [2021-03-10 21:18:09,421 INFO L276 IsEmpty]: Start isEmpty. Operand 8158 states and 25587 transitions. [2021-03-10 21:18:09,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:18:09,431 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:09,431 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:09,631 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable616 [2021-03-10 21:18:09,632 INFO L428 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:09,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:09,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1452776581, now seen corresponding path program 328 times [2021-03-10 21:18:09,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:09,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435254192] [2021-03-10 21:18:09,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:09,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:09,987 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:09,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435254192] [2021-03-10 21:18:09,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341938708] [2021-03-10 21:18:09,987 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 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 [2021-03-10 21:18:10,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:18:10,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:10,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 21:18:10,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:10,215 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:10,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:10,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-03-10 21:18:10,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377615196] [2021-03-10 21:18:10,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:18:10,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:10,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:18:10,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:18:10,216 INFO L87 Difference]: Start difference. First operand 8158 states and 25587 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 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) [2021-03-10 21:18:11,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:11,117 INFO L93 Difference]: Finished difference Result 8435 states and 26072 transitions. [2021-03-10 21:18:11,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:18:11,118 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 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 23 [2021-03-10 21:18:11,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:11,132 INFO L225 Difference]: With dead ends: 8435 [2021-03-10 21:18:11,132 INFO L226 Difference]: Without dead ends: 8428 [2021-03-10 21:18:11,132 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 711.0ms TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:18:11,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8428 states. [2021-03-10 21:18:11,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8428 to 8154. [2021-03-10 21:18:11,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8154 states, 8153 states have (on average 3.1368821292775664) internal successors, (25575), 8153 states have internal predecessors, (25575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:11,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8154 states to 8154 states and 25575 transitions. [2021-03-10 21:18:11,254 INFO L78 Accepts]: Start accepts. Automaton has 8154 states and 25575 transitions. Word has length 23 [2021-03-10 21:18:11,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:11,254 INFO L480 AbstractCegarLoop]: Abstraction has 8154 states and 25575 transitions. [2021-03-10 21:18:11,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 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) [2021-03-10 21:18:11,255 INFO L276 IsEmpty]: Start isEmpty. Operand 8154 states and 25575 transitions. [2021-03-10 21:18:11,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:18:11,264 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:11,264 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:11,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable619,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:11,464 INFO L428 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:11,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:11,464 INFO L82 PathProgramCache]: Analyzing trace with hash 835429403, now seen corresponding path program 329 times [2021-03-10 21:18:11,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:11,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945475055] [2021-03-10 21:18:11,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:11,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:11,610 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:11,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945475055] [2021-03-10 21:18:11,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281006569] [2021-03-10 21:18:11,611 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:11,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:18:11,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:11,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:18:11,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:11,862 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:11,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:11,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-03-10 21:18:11,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955837419] [2021-03-10 21:18:11,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:18:11,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:11,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:18:11,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:18:11,863 INFO L87 Difference]: Start difference. First operand 8154 states and 25575 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 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) [2021-03-10 21:18:12,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:12,194 INFO L93 Difference]: Finished difference Result 11007 states and 33833 transitions. [2021-03-10 21:18:12,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:18:12,195 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 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 24 [2021-03-10 21:18:12,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:12,211 INFO L225 Difference]: With dead ends: 11007 [2021-03-10 21:18:12,212 INFO L226 Difference]: Without dead ends: 10984 [2021-03-10 21:18:12,212 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 457.4ms TimeCoverageRelationStatistics Valid=300, Invalid=890, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:18:12,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10984 states. [2021-03-10 21:18:12,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10984 to 8149. [2021-03-10 21:18:12,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8149 states, 8148 states have (on average 3.1375797741777123) internal successors, (25565), 8148 states have internal predecessors, (25565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:12,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8149 states to 8149 states and 25565 transitions. [2021-03-10 21:18:12,349 INFO L78 Accepts]: Start accepts. Automaton has 8149 states and 25565 transitions. Word has length 24 [2021-03-10 21:18:12,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:12,349 INFO L480 AbstractCegarLoop]: Abstraction has 8149 states and 25565 transitions. [2021-03-10 21:18:12,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 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) [2021-03-10 21:18:12,349 INFO L276 IsEmpty]: Start isEmpty. Operand 8149 states and 25565 transitions. [2021-03-10 21:18:12,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:18:12,359 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:12,359 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:12,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable622 [2021-03-10 21:18:12,560 INFO L428 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:12,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:12,560 INFO L82 PathProgramCache]: Analyzing trace with hash 2031355403, now seen corresponding path program 330 times [2021-03-10 21:18:12,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:12,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781111490] [2021-03-10 21:18:12,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:12,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:12,658 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:12,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781111490] [2021-03-10 21:18:12,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52797103] [2021-03-10 21:18:12,659 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:12,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:18:12,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:12,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:18:12,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:12,893 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:12,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:12,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-03-10 21:18:12,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114552164] [2021-03-10 21:18:12,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:18:12,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:12,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:18:12,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:18:12,894 INFO L87 Difference]: Start difference. First operand 8149 states and 25565 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 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) [2021-03-10 21:18:13,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:13,187 INFO L93 Difference]: Finished difference Result 11150 states and 34266 transitions. [2021-03-10 21:18:13,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:18:13,188 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 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 24 [2021-03-10 21:18:13,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:13,205 INFO L225 Difference]: With dead ends: 11150 [2021-03-10 21:18:13,205 INFO L226 Difference]: Without dead ends: 11150 [2021-03-10 21:18:13,206 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 292.4ms TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:18:13,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11150 states. [2021-03-10 21:18:13,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11150 to 8243. [2021-03-10 21:18:13,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8243 states, 8242 states have (on average 3.1360106770201406) internal successors, (25847), 8242 states have internal predecessors, (25847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:13,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8243 states to 8243 states and 25847 transitions. [2021-03-10 21:18:13,389 INFO L78 Accepts]: Start accepts. Automaton has 8243 states and 25847 transitions. Word has length 24 [2021-03-10 21:18:13,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:13,389 INFO L480 AbstractCegarLoop]: Abstraction has 8243 states and 25847 transitions. [2021-03-10 21:18:13,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 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) [2021-03-10 21:18:13,389 INFO L276 IsEmpty]: Start isEmpty. Operand 8243 states and 25847 transitions. [2021-03-10 21:18:13,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:18:13,399 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:13,400 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:13,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable623,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:13,600 INFO L428 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:13,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:13,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1049828081, now seen corresponding path program 331 times [2021-03-10 21:18:13,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:13,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825960824] [2021-03-10 21:18:13,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:13,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:13,719 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:13,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825960824] [2021-03-10 21:18:13,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852366419] [2021-03-10 21:18:13,719 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:13,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:13,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:18:13,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:13,891 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:13,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:13,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-03-10 21:18:13,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765418308] [2021-03-10 21:18:13,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:18:13,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:13,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:18:13,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:18:13,892 INFO L87 Difference]: Start difference. First operand 8243 states and 25847 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:15,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:15,325 INFO L93 Difference]: Finished difference Result 12726 states and 38747 transitions. [2021-03-10 21:18:15,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-03-10 21:18:15,326 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:18:15,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:15,348 INFO L225 Difference]: With dead ends: 12726 [2021-03-10 21:18:15,348 INFO L226 Difference]: Without dead ends: 12716 [2021-03-10 21:18:15,348 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1234 ImplicationChecksByTransitivity, 1204.5ms TimeCoverageRelationStatistics Valid=1502, Invalid=3190, Unknown=0, NotChecked=0, Total=4692 [2021-03-10 21:18:15,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12716 states. [2021-03-10 21:18:15,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12716 to 9550. [2021-03-10 21:18:15,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9550 states, 9549 states have (on average 3.163472614933501) internal successors, (30208), 9549 states have internal predecessors, (30208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:15,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9550 states to 9550 states and 30208 transitions. [2021-03-10 21:18:15,524 INFO L78 Accepts]: Start accepts. Automaton has 9550 states and 30208 transitions. Word has length 24 [2021-03-10 21:18:15,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:15,524 INFO L480 AbstractCegarLoop]: Abstraction has 9550 states and 30208 transitions. [2021-03-10 21:18:15,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:15,524 INFO L276 IsEmpty]: Start isEmpty. Operand 9550 states and 30208 transitions. [2021-03-10 21:18:15,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:18:15,536 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:15,537 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:15,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable624 [2021-03-10 21:18:15,737 INFO L428 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:15,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:15,737 INFO L82 PathProgramCache]: Analyzing trace with hash -478373275, now seen corresponding path program 332 times [2021-03-10 21:18:15,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:15,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855285723] [2021-03-10 21:18:15,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:15,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:15,870 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:15,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855285723] [2021-03-10 21:18:15,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554382184] [2021-03-10 21:18:15,871 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 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 [2021-03-10 21:18:15,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:18:15,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:15,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:18:15,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:16,158 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:16,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:16,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-03-10 21:18:16,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016726796] [2021-03-10 21:18:16,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:18:16,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:16,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:18:16,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:18:16,159 INFO L87 Difference]: Start difference. First operand 9550 states and 30208 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:17,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:17,674 INFO L93 Difference]: Finished difference Result 12601 states and 38222 transitions. [2021-03-10 21:18:17,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-03-10 21:18:17,676 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:18:17,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:17,697 INFO L225 Difference]: With dead ends: 12601 [2021-03-10 21:18:17,697 INFO L226 Difference]: Without dead ends: 12595 [2021-03-10 21:18:17,698 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1712 ImplicationChecksByTransitivity, 1276.5ms TimeCoverageRelationStatistics Valid=1386, Invalid=4314, Unknown=0, NotChecked=0, Total=5700 [2021-03-10 21:18:17,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12595 states. [2021-03-10 21:18:17,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12595 to 9022. [2021-03-10 21:18:17,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9022 states, 9021 states have (on average 3.1354617004766654) internal successors, (28285), 9021 states have internal predecessors, (28285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:17,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9022 states to 9022 states and 28285 transitions. [2021-03-10 21:18:17,885 INFO L78 Accepts]: Start accepts. Automaton has 9022 states and 28285 transitions. Word has length 24 [2021-03-10 21:18:17,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:17,885 INFO L480 AbstractCegarLoop]: Abstraction has 9022 states and 28285 transitions. [2021-03-10 21:18:17,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:17,886 INFO L276 IsEmpty]: Start isEmpty. Operand 9022 states and 28285 transitions. [2021-03-10 21:18:17,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:18:17,897 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:17,897 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:18,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable625,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:18,097 INFO L428 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:18,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:18,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1885022475, now seen corresponding path program 333 times [2021-03-10 21:18:18,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:18,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063537007] [2021-03-10 21:18:18,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:18,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:18,221 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:18,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063537007] [2021-03-10 21:18:18,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661128067] [2021-03-10 21:18:18,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:18,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:18:18,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:18,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:18:18,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:18,425 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:18,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:18,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-03-10 21:18:18,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622919199] [2021-03-10 21:18:18,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:18:18,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:18,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:18:18,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:18:18,425 INFO L87 Difference]: Start difference. First operand 9022 states and 28285 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:20,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:20,281 INFO L93 Difference]: Finished difference Result 11076 states and 33757 transitions. [2021-03-10 21:18:20,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-03-10 21:18:20,283 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:18:20,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:20,300 INFO L225 Difference]: With dead ends: 11076 [2021-03-10 21:18:20,300 INFO L226 Difference]: Without dead ends: 11076 [2021-03-10 21:18:20,301 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 1565.6ms TimeCoverageRelationStatistics Valid=2135, Invalid=3871, Unknown=0, NotChecked=0, Total=6006 [2021-03-10 21:18:20,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11076 states. [2021-03-10 21:18:20,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11076 to 9541. [2021-03-10 21:18:20,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9541 states, 9540 states have (on average 3.1517819706498953) internal successors, (30068), 9540 states have internal predecessors, (30068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:20,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9541 states to 9541 states and 30068 transitions. [2021-03-10 21:18:20,461 INFO L78 Accepts]: Start accepts. Automaton has 9541 states and 30068 transitions. Word has length 24 [2021-03-10 21:18:20,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:20,462 INFO L480 AbstractCegarLoop]: Abstraction has 9541 states and 30068 transitions. [2021-03-10 21:18:20,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:20,462 INFO L276 IsEmpty]: Start isEmpty. Operand 9541 states and 30068 transitions. [2021-03-10 21:18:20,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:18:20,471 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:20,471 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:20,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable626,337 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:20,672 INFO L428 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:20,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:20,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1420431371, now seen corresponding path program 334 times [2021-03-10 21:18:20,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:20,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53848465] [2021-03-10 21:18:20,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:20,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:20,846 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:20,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53848465] [2021-03-10 21:18:20,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990906004] [2021-03-10 21:18:20,846 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:20,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:18:20,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:20,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:18:20,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:21,128 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:21,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:21,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-03-10 21:18:21,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636455780] [2021-03-10 21:18:21,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:18:21,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:21,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:18:21,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=312, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:18:21,129 INFO L87 Difference]: Start difference. First operand 9541 states and 30068 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) [2021-03-10 21:18:22,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:22,891 INFO L93 Difference]: Finished difference Result 10620 states and 32666 transitions. [2021-03-10 21:18:22,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-03-10 21:18:22,892 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 24 [2021-03-10 21:18:22,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:22,909 INFO L225 Difference]: With dead ends: 10620 [2021-03-10 21:18:22,909 INFO L226 Difference]: Without dead ends: 10616 [2021-03-10 21:18:22,910 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1908 ImplicationChecksByTransitivity, 1643.8ms TimeCoverageRelationStatistics Valid=2587, Invalid=4895, Unknown=0, NotChecked=0, Total=7482 [2021-03-10 21:18:22,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10616 states. [2021-03-10 21:18:23,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10616 to 8587. [2021-03-10 21:18:23,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8587 states, 8586 states have (on average 3.1179827626368506) internal successors, (26771), 8586 states have internal predecessors, (26771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:23,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8587 states to 8587 states and 26771 transitions. [2021-03-10 21:18:23,043 INFO L78 Accepts]: Start accepts. Automaton has 8587 states and 26771 transitions. Word has length 24 [2021-03-10 21:18:23,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:23,043 INFO L480 AbstractCegarLoop]: Abstraction has 8587 states and 26771 transitions. [2021-03-10 21:18:23,043 INFO L481 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) [2021-03-10 21:18:23,044 INFO L276 IsEmpty]: Start isEmpty. Operand 8587 states and 26771 transitions. [2021-03-10 21:18:23,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:18:23,052 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:23,052 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:23,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable627 [2021-03-10 21:18:23,253 INFO L428 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:23,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:23,253 INFO L82 PathProgramCache]: Analyzing trace with hash 56856527, now seen corresponding path program 335 times [2021-03-10 21:18:23,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:23,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623128572] [2021-03-10 21:18:23,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:23,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:23,394 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:23,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623128572] [2021-03-10 21:18:23,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69747664] [2021-03-10 21:18:23,394 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:23,414 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:18:23,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:23,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:18:23,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:23,690 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:23,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:23,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-03-10 21:18:23,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712334293] [2021-03-10 21:18:23,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:18:23,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:23,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:18:23,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:18:23,691 INFO L87 Difference]: Start difference. First operand 8587 states and 26771 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:25,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:25,180 INFO L93 Difference]: Finished difference Result 11811 states and 35428 transitions. [2021-03-10 21:18:25,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-03-10 21:18:25,182 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:18:25,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:25,200 INFO L225 Difference]: With dead ends: 11811 [2021-03-10 21:18:25,200 INFO L226 Difference]: Without dead ends: 11802 [2021-03-10 21:18:25,201 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1545 ImplicationChecksByTransitivity, 1291.7ms TimeCoverageRelationStatistics Valid=1185, Invalid=3927, Unknown=0, NotChecked=0, Total=5112 [2021-03-10 21:18:25,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11802 states. [2021-03-10 21:18:25,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11802 to 8719. [2021-03-10 21:18:25,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8719 states, 8718 states have (on average 3.118261069052535) internal successors, (27185), 8718 states have internal predecessors, (27185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:25,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8719 states to 8719 states and 27185 transitions. [2021-03-10 21:18:25,355 INFO L78 Accepts]: Start accepts. Automaton has 8719 states and 27185 transitions. Word has length 24 [2021-03-10 21:18:25,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:25,355 INFO L480 AbstractCegarLoop]: Abstraction has 8719 states and 27185 transitions. [2021-03-10 21:18:25,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:25,355 INFO L276 IsEmpty]: Start isEmpty. Operand 8719 states and 27185 transitions. [2021-03-10 21:18:25,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:18:25,366 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:25,366 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:25,566 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable628,339 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:25,567 INFO L428 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:25,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:25,567 INFO L82 PathProgramCache]: Analyzing trace with hash -530888795, now seen corresponding path program 336 times [2021-03-10 21:18:25,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:25,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876773628] [2021-03-10 21:18:25,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:25,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:25,649 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:25,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876773628] [2021-03-10 21:18:25,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911159651] [2021-03-10 21:18:25,649 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:25,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:18:25,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:25,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:18:25,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:25,906 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:25,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:25,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-03-10 21:18:25,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689383186] [2021-03-10 21:18:25,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:18:25,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:25,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:18:25,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:18:25,907 INFO L87 Difference]: Start difference. First operand 8719 states and 27185 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:27,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:27,230 INFO L93 Difference]: Finished difference Result 11970 states and 35970 transitions. [2021-03-10 21:18:27,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-03-10 21:18:27,232 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:18:27,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:27,251 INFO L225 Difference]: With dead ends: 11970 [2021-03-10 21:18:27,251 INFO L226 Difference]: Without dead ends: 11958 [2021-03-10 21:18:27,251 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 1116.3ms TimeCoverageRelationStatistics Valid=1016, Invalid=3540, Unknown=0, NotChecked=0, Total=4556 [2021-03-10 21:18:27,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11958 states. [2021-03-10 21:18:27,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11958 to 8793. [2021-03-10 21:18:27,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8793 states, 8792 states have (on average 3.1199954504094634) internal successors, (27431), 8792 states have internal predecessors, (27431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:27,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8793 states to 8793 states and 27431 transitions. [2021-03-10 21:18:27,415 INFO L78 Accepts]: Start accepts. Automaton has 8793 states and 27431 transitions. Word has length 24 [2021-03-10 21:18:27,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:27,415 INFO L480 AbstractCegarLoop]: Abstraction has 8793 states and 27431 transitions. [2021-03-10 21:18:27,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:27,415 INFO L276 IsEmpty]: Start isEmpty. Operand 8793 states and 27431 transitions. [2021-03-10 21:18:27,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:18:27,427 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:27,427 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:27,627 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable629,340 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:27,627 INFO L428 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:27,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:27,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1571124593, now seen corresponding path program 337 times [2021-03-10 21:18:27,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:27,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607394154] [2021-03-10 21:18:27,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:27,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:27,779 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:27,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607394154] [2021-03-10 21:18:27,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492591487] [2021-03-10 21:18:27,779 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:27,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:27,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:18:27,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:28,085 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:28,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:28,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-03-10 21:18:28,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585669707] [2021-03-10 21:18:28,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:18:28,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:28,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:18:28,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:18:28,085 INFO L87 Difference]: Start difference. First operand 8793 states and 27431 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:29,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:29,320 INFO L93 Difference]: Finished difference Result 12336 states and 37268 transitions. [2021-03-10 21:18:29,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-03-10 21:18:29,322 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:18:29,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:29,343 INFO L225 Difference]: With dead ends: 12336 [2021-03-10 21:18:29,343 INFO L226 Difference]: Without dead ends: 12321 [2021-03-10 21:18:29,344 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 1142.3ms TimeCoverageRelationStatistics Valid=880, Invalid=3152, Unknown=0, NotChecked=0, Total=4032 [2021-03-10 21:18:29,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12321 states. [2021-03-10 21:18:29,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12321 to 8832. [2021-03-10 21:18:29,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8832 states, 8831 states have (on average 3.1192390442758464) internal successors, (27546), 8831 states have internal predecessors, (27546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:29,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8832 states to 8832 states and 27546 transitions. [2021-03-10 21:18:29,517 INFO L78 Accepts]: Start accepts. Automaton has 8832 states and 27546 transitions. Word has length 24 [2021-03-10 21:18:29,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:29,517 INFO L480 AbstractCegarLoop]: Abstraction has 8832 states and 27546 transitions. [2021-03-10 21:18:29,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:29,517 INFO L276 IsEmpty]: Start isEmpty. Operand 8832 states and 27546 transitions. [2021-03-10 21:18:29,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:18:29,530 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:29,530 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:29,730 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable630 [2021-03-10 21:18:29,730 INFO L428 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:29,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:29,731 INFO L82 PathProgramCache]: Analyzing trace with hash 541304037, now seen corresponding path program 338 times [2021-03-10 21:18:29,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:29,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128864118] [2021-03-10 21:18:29,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:29,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:29,866 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:29,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128864118] [2021-03-10 21:18:29,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069450880] [2021-03-10 21:18:29,867 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 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 [2021-03-10 21:18:29,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:18:29,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:29,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:18:29,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:30,179 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:30,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:30,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-03-10 21:18:30,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116107395] [2021-03-10 21:18:30,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:18:30,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:30,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:18:30,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:18:30,180 INFO L87 Difference]: Start difference. First operand 8832 states and 27546 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:31,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:31,348 INFO L93 Difference]: Finished difference Result 12564 states and 38035 transitions. [2021-03-10 21:18:31,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-10 21:18:31,349 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:18:31,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:31,365 INFO L225 Difference]: With dead ends: 12564 [2021-03-10 21:18:31,365 INFO L226 Difference]: Without dead ends: 12546 [2021-03-10 21:18:31,365 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 1158.3ms TimeCoverageRelationStatistics Valid=778, Invalid=2762, Unknown=0, NotChecked=0, Total=3540 [2021-03-10 21:18:31,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12546 states. [2021-03-10 21:18:31,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12546 to 8863. [2021-03-10 21:18:31,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8863 states, 8862 states have (on average 3.116339426765967) internal successors, (27617), 8862 states have internal predecessors, (27617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:31,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8863 states to 8863 states and 27617 transitions. [2021-03-10 21:18:31,509 INFO L78 Accepts]: Start accepts. Automaton has 8863 states and 27617 transitions. Word has length 24 [2021-03-10 21:18:31,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:31,509 INFO L480 AbstractCegarLoop]: Abstraction has 8863 states and 27617 transitions. [2021-03-10 21:18:31,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:31,509 INFO L276 IsEmpty]: Start isEmpty. Operand 8863 states and 27617 transitions. [2021-03-10 21:18:31,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:18:31,520 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:31,520 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:31,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 342 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2021-03-10 21:18:31,721 INFO L428 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:31,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:31,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1602082127, now seen corresponding path program 339 times [2021-03-10 21:18:31,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:31,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347701023] [2021-03-10 21:18:31,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:31,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:31,874 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:31,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347701023] [2021-03-10 21:18:31,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402300144] [2021-03-10 21:18:31,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:31,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:18:31,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:31,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:18:31,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:32,199 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:32,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:32,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-03-10 21:18:32,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749053796] [2021-03-10 21:18:32,199 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:18:32,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:32,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:18:32,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:18:32,200 INFO L87 Difference]: Start difference. First operand 8863 states and 27617 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:32,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:32,934 INFO L93 Difference]: Finished difference Result 11519 states and 34816 transitions. [2021-03-10 21:18:32,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 21:18:32,936 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:18:32,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:32,954 INFO L225 Difference]: With dead ends: 11519 [2021-03-10 21:18:32,955 INFO L226 Difference]: Without dead ends: 11501 [2021-03-10 21:18:32,955 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 830.8ms TimeCoverageRelationStatistics Valid=591, Invalid=1959, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 21:18:32,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11501 states. [2021-03-10 21:18:33,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11501 to 8863. [2021-03-10 21:18:33,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8863 states, 8862 states have (on average 3.115662378695554) internal successors, (27611), 8862 states have internal predecessors, (27611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:33,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8863 states to 8863 states and 27611 transitions. [2021-03-10 21:18:33,116 INFO L78 Accepts]: Start accepts. Automaton has 8863 states and 27611 transitions. Word has length 24 [2021-03-10 21:18:33,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:33,116 INFO L480 AbstractCegarLoop]: Abstraction has 8863 states and 27611 transitions. [2021-03-10 21:18:33,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:33,116 INFO L276 IsEmpty]: Start isEmpty. Operand 8863 states and 27611 transitions. [2021-03-10 21:18:33,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:18:33,128 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:33,128 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:33,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable632 [2021-03-10 21:18:33,328 INFO L428 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:33,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:33,329 INFO L82 PathProgramCache]: Analyzing trace with hash 370144463, now seen corresponding path program 340 times [2021-03-10 21:18:33,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:33,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060497044] [2021-03-10 21:18:33,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:33,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:33,469 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:33,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060497044] [2021-03-10 21:18:33,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224904299] [2021-03-10 21:18:33,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:33,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:18:33,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:33,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:18:33,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:33,783 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:33,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:33,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-03-10 21:18:33,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710512294] [2021-03-10 21:18:33,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:18:33,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:33,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:18:33,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:18:33,783 INFO L87 Difference]: Start difference. First operand 8863 states and 27611 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:35,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:35,691 INFO L93 Difference]: Finished difference Result 10540 states and 31822 transitions. [2021-03-10 21:18:35,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-03-10 21:18:35,692 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:18:35,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:35,705 INFO L225 Difference]: With dead ends: 10540 [2021-03-10 21:18:35,705 INFO L226 Difference]: Without dead ends: 10528 [2021-03-10 21:18:35,705 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1401 ImplicationChecksByTransitivity, 1652.4ms TimeCoverageRelationStatistics Valid=2017, Invalid=3683, Unknown=0, NotChecked=0, Total=5700 [2021-03-10 21:18:35,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10528 states. [2021-03-10 21:18:35,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10528 to 9379. [2021-03-10 21:18:35,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9379 states, 9378 states have (on average 3.1330774152271275) internal successors, (29382), 9378 states have internal predecessors, (29382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:35,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9379 states to 9379 states and 29382 transitions. [2021-03-10 21:18:35,838 INFO L78 Accepts]: Start accepts. Automaton has 9379 states and 29382 transitions. Word has length 24 [2021-03-10 21:18:35,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:35,838 INFO L480 AbstractCegarLoop]: Abstraction has 9379 states and 29382 transitions. [2021-03-10 21:18:35,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:35,838 INFO L276 IsEmpty]: Start isEmpty. Operand 9379 states and 29382 transitions. [2021-03-10 21:18:35,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:18:35,849 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:35,849 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:36,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable633,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:36,059 INFO L428 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:36,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:36,059 INFO L82 PathProgramCache]: Analyzing trace with hash -94446641, now seen corresponding path program 341 times [2021-03-10 21:18:36,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:36,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405230874] [2021-03-10 21:18:36,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:36,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:36,206 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:18:36,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405230874] [2021-03-10 21:18:36,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547418558] [2021-03-10 21:18:36,207 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:36,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:18:36,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:36,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:18:36,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:36,514 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:36,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:36,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-03-10 21:18:36,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464681235] [2021-03-10 21:18:36,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:18:36,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:36,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:18:36,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:18:36,515 INFO L87 Difference]: Start difference. First operand 9379 states and 29382 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:38,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:38,705 INFO L93 Difference]: Finished difference Result 10146 states and 30795 transitions. [2021-03-10 21:18:38,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-03-10 21:18:38,706 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:18:38,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:38,718 INFO L225 Difference]: With dead ends: 10146 [2021-03-10 21:18:38,718 INFO L226 Difference]: Without dead ends: 10136 [2021-03-10 21:18:38,719 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1977 ImplicationChecksByTransitivity, 1896.7ms TimeCoverageRelationStatistics Valid=2525, Invalid=5131, Unknown=0, NotChecked=0, Total=7656 [2021-03-10 21:18:38,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10136 states. [2021-03-10 21:18:38,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10136 to 8546. [2021-03-10 21:18:38,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8546 states, 8545 states have (on average 3.1049736688121707) internal successors, (26532), 8545 states have internal predecessors, (26532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:38,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8546 states to 8546 states and 26532 transitions. [2021-03-10 21:18:38,830 INFO L78 Accepts]: Start accepts. Automaton has 8546 states and 26532 transitions. Word has length 24 [2021-03-10 21:18:38,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:38,830 INFO L480 AbstractCegarLoop]: Abstraction has 8546 states and 26532 transitions. [2021-03-10 21:18:38,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:38,830 INFO L276 IsEmpty]: Start isEmpty. Operand 8546 states and 26532 transitions. [2021-03-10 21:18:38,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:18:38,839 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:38,839 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:39,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable634 [2021-03-10 21:18:39,039 INFO L428 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:39,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:39,039 INFO L82 PathProgramCache]: Analyzing trace with hash -128045869, now seen corresponding path program 342 times [2021-03-10 21:18:39,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:39,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617901249] [2021-03-10 21:18:39,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:39,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:39,194 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:39,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617901249] [2021-03-10 21:18:39,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847298579] [2021-03-10 21:18:39,195 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:39,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:18:39,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:39,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:18:39,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:39,515 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:39,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:39,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-03-10 21:18:39,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633399492] [2021-03-10 21:18:39,516 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:18:39,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:39,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:18:39,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:18:39,516 INFO L87 Difference]: Start difference. First operand 8546 states and 26532 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:41,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:41,551 INFO L93 Difference]: Finished difference Result 9224 states and 27859 transitions. [2021-03-10 21:18:41,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-03-10 21:18:41,553 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:18:41,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:41,568 INFO L225 Difference]: With dead ends: 9224 [2021-03-10 21:18:41,568 INFO L226 Difference]: Without dead ends: 9216 [2021-03-10 21:18:41,569 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2128 ImplicationChecksByTransitivity, 1769.4ms TimeCoverageRelationStatistics Valid=2548, Invalid=5284, Unknown=0, NotChecked=0, Total=7832 [2021-03-10 21:18:41,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9216 states. [2021-03-10 21:18:41,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9216 to 8570. [2021-03-10 21:18:41,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8570 states, 8569 states have (on average 3.104212860310421) internal successors, (26600), 8569 states have internal predecessors, (26600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:41,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8570 states to 8570 states and 26600 transitions. [2021-03-10 21:18:41,712 INFO L78 Accepts]: Start accepts. Automaton has 8570 states and 26600 transitions. Word has length 24 [2021-03-10 21:18:41,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:41,712 INFO L480 AbstractCegarLoop]: Abstraction has 8570 states and 26600 transitions. [2021-03-10 21:18:41,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:41,712 INFO L276 IsEmpty]: Start isEmpty. Operand 8570 states and 26600 transitions. [2021-03-10 21:18:41,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:18:41,724 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:41,724 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:41,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable635 [2021-03-10 21:18:41,924 INFO L428 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:41,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:41,924 INFO L82 PathProgramCache]: Analyzing trace with hash 653566347, now seen corresponding path program 343 times [2021-03-10 21:18:41,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:41,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135475019] [2021-03-10 21:18:41,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:41,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:41,998 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:41,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135475019] [2021-03-10 21:18:41,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069465893] [2021-03-10 21:18:41,998 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 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 [2021-03-10 21:18:42,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:42,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:18:42,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:42,326 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:42,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:42,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-03-10 21:18:42,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457820070] [2021-03-10 21:18:42,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:18:42,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:42,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:18:42,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:18:42,327 INFO L87 Difference]: Start difference. First operand 8570 states and 26600 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 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) [2021-03-10 21:18:44,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:44,190 INFO L93 Difference]: Finished difference Result 10464 states and 31357 transitions. [2021-03-10 21:18:44,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-03-10 21:18:44,192 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 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 24 [2021-03-10 21:18:44,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:44,208 INFO L225 Difference]: With dead ends: 10464 [2021-03-10 21:18:44,208 INFO L226 Difference]: Without dead ends: 10443 [2021-03-10 21:18:44,208 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1301 ImplicationChecksByTransitivity, 1544.2ms TimeCoverageRelationStatistics Valid=1915, Invalid=3487, Unknown=0, NotChecked=0, Total=5402 [2021-03-10 21:18:44,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10443 states. [2021-03-10 21:18:44,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10443 to 9099. [2021-03-10 21:18:44,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9099 states, 9098 states have (on average 3.1227742360958453) internal successors, (28411), 9098 states have internal predecessors, (28411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:44,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9099 states to 9099 states and 28411 transitions. [2021-03-10 21:18:44,361 INFO L78 Accepts]: Start accepts. Automaton has 9099 states and 28411 transitions. Word has length 24 [2021-03-10 21:18:44,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:44,361 INFO L480 AbstractCegarLoop]: Abstraction has 9099 states and 28411 transitions. [2021-03-10 21:18:44,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 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) [2021-03-10 21:18:44,361 INFO L276 IsEmpty]: Start isEmpty. Operand 9099 states and 28411 transitions. [2021-03-10 21:18:44,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:18:44,414 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:44,414 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:44,614 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable636,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:44,614 INFO L428 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:44,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:44,615 INFO L82 PathProgramCache]: Analyzing trace with hash 188975243, now seen corresponding path program 344 times [2021-03-10 21:18:44,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:44,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309214002] [2021-03-10 21:18:44,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:44,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:44,731 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:18:44,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309214002] [2021-03-10 21:18:44,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45763405] [2021-03-10 21:18:44,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:18:44,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:18:44,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:44,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:18:44,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:44,951 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:44,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:44,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-03-10 21:18:44,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699063646] [2021-03-10 21:18:44,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:18:44,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:44,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:18:44,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:18:44,952 INFO L87 Difference]: Start difference. First operand 9099 states and 28411 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:47,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:47,276 INFO L93 Difference]: Finished difference Result 9961 states and 30084 transitions. [2021-03-10 21:18:47,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-03-10 21:18:47,277 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:18:47,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:47,293 INFO L225 Difference]: With dead ends: 9961 [2021-03-10 21:18:47,293 INFO L226 Difference]: Without dead ends: 9953 [2021-03-10 21:18:47,294 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2214 ImplicationChecksByTransitivity, 1953.2ms TimeCoverageRelationStatistics Valid=2592, Invalid=5598, Unknown=0, NotChecked=0, Total=8190 [2021-03-10 21:18:47,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9953 states. [2021-03-10 21:18:47,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9953 to 8603. [2021-03-10 21:18:47,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8603 states, 8602 states have (on average 3.106370611485701) internal successors, (26721), 8602 states have internal predecessors, (26721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:47,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8603 states to 8603 states and 26721 transitions. [2021-03-10 21:18:47,443 INFO L78 Accepts]: Start accepts. Automaton has 8603 states and 26721 transitions. Word has length 24 [2021-03-10 21:18:47,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:47,443 INFO L480 AbstractCegarLoop]: Abstraction has 8603 states and 26721 transitions. [2021-03-10 21:18:47,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:47,443 INFO L276 IsEmpty]: Start isEmpty. Operand 8603 states and 26721 transitions. [2021-03-10 21:18:47,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:18:47,454 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:47,455 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:47,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable637,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:47,655 INFO L428 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:47,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:47,655 INFO L82 PathProgramCache]: Analyzing trace with hash 155376015, now seen corresponding path program 345 times [2021-03-10 21:18:47,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:47,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058920995] [2021-03-10 21:18:47,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:47,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:47,814 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:18:47,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058920995] [2021-03-10 21:18:47,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760086159] [2021-03-10 21:18:47,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:47,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:18:47,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:47,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:18:47,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:48,176 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:48,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:48,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-03-10 21:18:48,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479964433] [2021-03-10 21:18:48,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:18:48,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:48,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:18:48,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:18:48,177 INFO L87 Difference]: Start difference. First operand 8603 states and 26721 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:50,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:50,377 INFO L93 Difference]: Finished difference Result 9572 states and 28782 transitions. [2021-03-10 21:18:50,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-03-10 21:18:50,378 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:18:50,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:50,392 INFO L225 Difference]: With dead ends: 9572 [2021-03-10 21:18:50,392 INFO L226 Difference]: Without dead ends: 9556 [2021-03-10 21:18:50,393 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2244 ImplicationChecksByTransitivity, 2035.8ms TimeCoverageRelationStatistics Valid=2475, Invalid=5535, Unknown=0, NotChecked=0, Total=8010 [2021-03-10 21:18:50,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9556 states. [2021-03-10 21:18:50,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9556 to 8460. [2021-03-10 21:18:50,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8460 states, 8459 states have (on average 3.1066319895968793) internal successors, (26279), 8459 states have internal predecessors, (26279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:50,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8460 states to 8460 states and 26279 transitions. [2021-03-10 21:18:50,497 INFO L78 Accepts]: Start accepts. Automaton has 8460 states and 26279 transitions. Word has length 24 [2021-03-10 21:18:50,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:50,497 INFO L480 AbstractCegarLoop]: Abstraction has 8460 states and 26279 transitions. [2021-03-10 21:18:50,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:50,498 INFO L276 IsEmpty]: Start isEmpty. Operand 8460 states and 26279 transitions. [2021-03-10 21:18:50,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:18:50,506 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:50,506 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:50,706 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable638,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:50,706 INFO L428 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:50,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:50,707 INFO L82 PathProgramCache]: Analyzing trace with hash -886200053, now seen corresponding path program 346 times [2021-03-10 21:18:50,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:50,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502002074] [2021-03-10 21:18:50,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:50,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:50,864 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:50,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502002074] [2021-03-10 21:18:50,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506068415] [2021-03-10 21:18:50,864 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 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 [2021-03-10 21:18:50,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:18:50,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:50,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:18:50,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:51,245 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:51,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:51,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-03-10 21:18:51,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990400849] [2021-03-10 21:18:51,246 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:18:51,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:51,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:18:51,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:18:51,246 INFO L87 Difference]: Start difference. First operand 8460 states and 26279 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:53,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:53,281 INFO L93 Difference]: Finished difference Result 9239 states and 27893 transitions. [2021-03-10 21:18:53,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-03-10 21:18:53,282 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:18:53,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:53,297 INFO L225 Difference]: With dead ends: 9239 [2021-03-10 21:18:53,297 INFO L226 Difference]: Without dead ends: 9227 [2021-03-10 21:18:53,298 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2306 ImplicationChecksByTransitivity, 1887.1ms TimeCoverageRelationStatistics Valid=2455, Invalid=5555, Unknown=0, NotChecked=0, Total=8010 [2021-03-10 21:18:53,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9227 states. [2021-03-10 21:18:53,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9227 to 8490. [2021-03-10 21:18:53,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8490 states, 8489 states have (on average 3.107197549770291) internal successors, (26377), 8489 states have internal predecessors, (26377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:53,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8490 states to 8490 states and 26377 transitions. [2021-03-10 21:18:53,425 INFO L78 Accepts]: Start accepts. Automaton has 8490 states and 26377 transitions. Word has length 24 [2021-03-10 21:18:53,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:53,425 INFO L480 AbstractCegarLoop]: Abstraction has 8490 states and 26377 transitions. [2021-03-10 21:18:53,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:53,425 INFO L276 IsEmpty]: Start isEmpty. Operand 8490 states and 26377 transitions. [2021-03-10 21:18:53,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:18:53,433 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:53,433 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:53,634 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable639 [2021-03-10 21:18:53,634 INFO L428 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:53,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:53,634 INFO L82 PathProgramCache]: Analyzing trace with hash 849710159, now seen corresponding path program 347 times [2021-03-10 21:18:53,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:53,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355191284] [2021-03-10 21:18:53,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:53,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:53,752 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:53,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355191284] [2021-03-10 21:18:53,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940477928] [2021-03-10 21:18:53,752 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:18:53,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:18:53,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:53,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:18:53,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:54,102 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:54,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:54,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 22 [2021-03-10 21:18:54,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943891209] [2021-03-10 21:18:54,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:18:54,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:54,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:18:54,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:18:54,103 INFO L87 Difference]: Start difference. First operand 8490 states and 26377 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:55,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:55,928 INFO L93 Difference]: Finished difference Result 10604 states and 31742 transitions. [2021-03-10 21:18:55,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-03-10 21:18:55,930 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:18:55,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:55,946 INFO L225 Difference]: With dead ends: 10604 [2021-03-10 21:18:55,947 INFO L226 Difference]: Without dead ends: 10586 [2021-03-10 21:18:55,947 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 1594.8ms TimeCoverageRelationStatistics Valid=1821, Invalid=3291, Unknown=0, NotChecked=0, Total=5112 [2021-03-10 21:18:55,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10586 states. [2021-03-10 21:18:56,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10586 to 8963. [2021-03-10 21:18:56,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8963 states, 8962 states have (on average 3.121513055121625) internal successors, (27975), 8962 states have internal predecessors, (27975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:56,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8963 states to 8963 states and 27975 transitions. [2021-03-10 21:18:56,099 INFO L78 Accepts]: Start accepts. Automaton has 8963 states and 27975 transitions. Word has length 24 [2021-03-10 21:18:56,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:56,099 INFO L480 AbstractCegarLoop]: Abstraction has 8963 states and 27975 transitions. [2021-03-10 21:18:56,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:56,099 INFO L276 IsEmpty]: Start isEmpty. Operand 8963 states and 27975 transitions. [2021-03-10 21:18:56,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:18:56,111 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:56,111 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:56,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable640 [2021-03-10 21:18:56,312 INFO L428 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:56,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:56,312 INFO L82 PathProgramCache]: Analyzing trace with hash 385119055, now seen corresponding path program 348 times [2021-03-10 21:18:56,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:56,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610726513] [2021-03-10 21:18:56,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:56,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:56,437 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:18:56,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610726513] [2021-03-10 21:18:56,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256682841] [2021-03-10 21:18:56,438 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:56,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:18:56,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:56,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:18:56,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:56,773 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:56,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:56,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 22 [2021-03-10 21:18:56,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309297879] [2021-03-10 21:18:56,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:18:56,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:56,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:18:56,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:18:56,774 INFO L87 Difference]: Start difference. First operand 8963 states and 27975 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:59,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:59,144 INFO L93 Difference]: Finished difference Result 9967 states and 30031 transitions. [2021-03-10 21:18:59,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-03-10 21:18:59,146 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:18:59,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:59,162 INFO L225 Difference]: With dead ends: 9967 [2021-03-10 21:18:59,162 INFO L226 Difference]: Without dead ends: 9961 [2021-03-10 21:18:59,163 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2668 ImplicationChecksByTransitivity, 2165.9ms TimeCoverageRelationStatistics Valid=2787, Invalid=6333, Unknown=0, NotChecked=0, Total=9120 [2021-03-10 21:18:59,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9961 states. [2021-03-10 21:18:59,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9961 to 8724. [2021-03-10 21:18:59,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8724 states, 8723 states have (on average 3.112690588100424) internal successors, (27152), 8723 states have internal predecessors, (27152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:59,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8724 states to 8724 states and 27152 transitions. [2021-03-10 21:18:59,305 INFO L78 Accepts]: Start accepts. Automaton has 8724 states and 27152 transitions. Word has length 24 [2021-03-10 21:18:59,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:59,305 INFO L480 AbstractCegarLoop]: Abstraction has 8724 states and 27152 transitions. [2021-03-10 21:18:59,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:59,306 INFO L276 IsEmpty]: Start isEmpty. Operand 8724 states and 27152 transitions. [2021-03-10 21:18:59,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:18:59,314 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:59,315 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:59,515 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable641,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:59,515 INFO L428 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:59,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:59,515 INFO L82 PathProgramCache]: Analyzing trace with hash 351519827, now seen corresponding path program 349 times [2021-03-10 21:18:59,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:59,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795506313] [2021-03-10 21:18:59,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:59,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:59,602 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:18:59,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795506313] [2021-03-10 21:18:59,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840357419] [2021-03-10 21:18:59,602 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:59,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:59,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:18:59,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:00,036 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:00,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:00,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 23 [2021-03-10 21:19:00,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866307543] [2021-03-10 21:19:00,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:19:00,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:00,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:19:00,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:19:00,037 INFO L87 Difference]: Start difference. First operand 8724 states and 27152 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:02,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:02,482 INFO L93 Difference]: Finished difference Result 9884 states and 29758 transitions. [2021-03-10 21:19:02,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-03-10 21:19:02,484 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:19:02,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:02,500 INFO L225 Difference]: With dead ends: 9884 [2021-03-10 21:19:02,500 INFO L226 Difference]: Without dead ends: 9874 [2021-03-10 21:19:02,501 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2512 ImplicationChecksByTransitivity, 2269.4ms TimeCoverageRelationStatistics Valid=2529, Invalid=6027, Unknown=0, NotChecked=0, Total=8556 [2021-03-10 21:19:02,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9874 states. [2021-03-10 21:19:02,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9874 to 8701. [2021-03-10 21:19:02,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8701 states, 8700 states have (on average 3.1133333333333333) internal successors, (27086), 8700 states have internal predecessors, (27086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:02,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8701 states to 8701 states and 27086 transitions. [2021-03-10 21:19:02,649 INFO L78 Accepts]: Start accepts. Automaton has 8701 states and 27086 transitions. Word has length 24 [2021-03-10 21:19:02,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:02,649 INFO L480 AbstractCegarLoop]: Abstraction has 8701 states and 27086 transitions. [2021-03-10 21:19:02,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:02,650 INFO L276 IsEmpty]: Start isEmpty. Operand 8701 states and 27086 transitions. [2021-03-10 21:19:02,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:19:02,658 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:02,658 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:02,858 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable642 [2021-03-10 21:19:02,859 INFO L428 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:02,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:02,859 INFO L82 PathProgramCache]: Analyzing trace with hash -690056241, now seen corresponding path program 350 times [2021-03-10 21:19:02,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:02,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467153990] [2021-03-10 21:19:02,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:02,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:03,019 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:19:03,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467153990] [2021-03-10 21:19:03,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814715246] [2021-03-10 21:19:03,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:03,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:19:03,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:03,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:19:03,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:03,424 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:03,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:03,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2021-03-10 21:19:03,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45028374] [2021-03-10 21:19:03,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:19:03,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:03,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:19:03,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:19:03,425 INFO L87 Difference]: Start difference. First operand 8701 states and 27086 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:05,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:05,744 INFO L93 Difference]: Finished difference Result 9922 states and 29903 transitions. [2021-03-10 21:19:05,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-03-10 21:19:05,746 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:19:05,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:05,762 INFO L225 Difference]: With dead ends: 9922 [2021-03-10 21:19:05,762 INFO L226 Difference]: Without dead ends: 9904 [2021-03-10 21:19:05,763 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2457 ImplicationChecksByTransitivity, 2218.1ms TimeCoverageRelationStatistics Valid=2373, Invalid=5817, Unknown=0, NotChecked=0, Total=8190 [2021-03-10 21:19:05,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9904 states. [2021-03-10 21:19:05,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9904 to 8685. [2021-03-10 21:19:05,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8685 states, 8684 states have (on average 3.1182634730538923) internal successors, (27079), 8684 states have internal predecessors, (27079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:05,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8685 states to 8685 states and 27079 transitions. [2021-03-10 21:19:05,927 INFO L78 Accepts]: Start accepts. Automaton has 8685 states and 27079 transitions. Word has length 24 [2021-03-10 21:19:05,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:05,927 INFO L480 AbstractCegarLoop]: Abstraction has 8685 states and 27079 transitions. [2021-03-10 21:19:05,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:05,927 INFO L276 IsEmpty]: Start isEmpty. Operand 8685 states and 27079 transitions. [2021-03-10 21:19:05,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:19:05,939 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:05,939 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:06,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable643,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:06,140 INFO L428 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:06,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:06,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1380824019, now seen corresponding path program 351 times [2021-03-10 21:19:06,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:06,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608031393] [2021-03-10 21:19:06,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:06,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:06,315 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:06,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608031393] [2021-03-10 21:19:06,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066709914] [2021-03-10 21:19:06,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:06,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:19:06,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:06,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:19:06,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:06,769 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:06,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:06,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-03-10 21:19:06,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446656028] [2021-03-10 21:19:06,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:19:06,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:06,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:19:06,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:19:06,770 INFO L87 Difference]: Start difference. First operand 8685 states and 27079 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) [2021-03-10 21:19:08,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:08,876 INFO L93 Difference]: Finished difference Result 9621 states and 29138 transitions. [2021-03-10 21:19:08,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-03-10 21:19:08,878 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 24 [2021-03-10 21:19:08,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:08,896 INFO L225 Difference]: With dead ends: 9621 [2021-03-10 21:19:08,896 INFO L226 Difference]: Without dead ends: 9605 [2021-03-10 21:19:08,897 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2392 ImplicationChecksByTransitivity, 2040.9ms TimeCoverageRelationStatistics Valid=2313, Invalid=5697, Unknown=0, NotChecked=0, Total=8010 [2021-03-10 21:19:08,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9605 states. [2021-03-10 21:19:09,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9605 to 8716. [2021-03-10 21:19:09,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8716 states, 8715 states have (on average 3.119219736087206) internal successors, (27184), 8715 states have internal predecessors, (27184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:09,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8716 states to 8716 states and 27184 transitions. [2021-03-10 21:19:09,051 INFO L78 Accepts]: Start accepts. Automaton has 8716 states and 27184 transitions. Word has length 24 [2021-03-10 21:19:09,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:09,051 INFO L480 AbstractCegarLoop]: Abstraction has 8716 states and 27184 transitions. [2021-03-10 21:19:09,052 INFO L481 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) [2021-03-10 21:19:09,052 INFO L276 IsEmpty]: Start isEmpty. Operand 8716 states and 27184 transitions. [2021-03-10 21:19:09,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:19:09,064 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:09,064 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:09,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable644 [2021-03-10 21:19:09,265 INFO L428 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:09,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:09,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1659766261, now seen corresponding path program 352 times [2021-03-10 21:19:09,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:09,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025938986] [2021-03-10 21:19:09,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:09,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:09,383 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:09,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025938986] [2021-03-10 21:19:09,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185797184] [2021-03-10 21:19:09,383 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:09,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:19:09,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:09,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:19:09,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:09,829 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:09,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:09,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 22 [2021-03-10 21:19:09,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780825075] [2021-03-10 21:19:09,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:19:09,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:09,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:19:09,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:19:09,830 INFO L87 Difference]: Start difference. First operand 8716 states and 27184 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:11,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:11,795 INFO L93 Difference]: Finished difference Result 11348 states and 34100 transitions. [2021-03-10 21:19:11,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-03-10 21:19:11,797 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:19:11,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:11,816 INFO L225 Difference]: With dead ends: 11348 [2021-03-10 21:19:11,816 INFO L226 Difference]: Without dead ends: 11333 [2021-03-10 21:19:11,817 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1178 ImplicationChecksByTransitivity, 1762.0ms TimeCoverageRelationStatistics Valid=1717, Invalid=3113, Unknown=0, NotChecked=0, Total=4830 [2021-03-10 21:19:11,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11333 states. [2021-03-10 21:19:11,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11333 to 9625. [2021-03-10 21:19:11,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9625 states, 9624 states have (on average 3.1397547797173733) internal successors, (30217), 9624 states have internal predecessors, (30217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:11,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9625 states to 9625 states and 30217 transitions. [2021-03-10 21:19:11,988 INFO L78 Accepts]: Start accepts. Automaton has 9625 states and 30217 transitions. Word has length 24 [2021-03-10 21:19:11,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:11,988 INFO L480 AbstractCegarLoop]: Abstraction has 9625 states and 30217 transitions. [2021-03-10 21:19:11,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:11,988 INFO L276 IsEmpty]: Start isEmpty. Operand 9625 states and 30217 transitions. [2021-03-10 21:19:12,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:19:12,000 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:12,001 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:12,201 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable645,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:12,201 INFO L428 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:12,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:12,201 INFO L82 PathProgramCache]: Analyzing trace with hash -2124357365, now seen corresponding path program 353 times [2021-03-10 21:19:12,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:12,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532967188] [2021-03-10 21:19:12,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:12,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:12,310 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:19:12,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532967188] [2021-03-10 21:19:12,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131007269] [2021-03-10 21:19:12,311 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:12,331 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:19:12,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:12,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:19:12,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:12,722 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:12,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:12,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 22 [2021-03-10 21:19:12,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702793607] [2021-03-10 21:19:12,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:19:12,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:12,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:19:12,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:19:12,723 INFO L87 Difference]: Start difference. First operand 9625 states and 30217 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 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) [2021-03-10 21:19:15,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:15,671 INFO L93 Difference]: Finished difference Result 10893 states and 32965 transitions. [2021-03-10 21:19:15,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-03-10 21:19:15,673 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 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 24 [2021-03-10 21:19:15,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:15,692 INFO L225 Difference]: With dead ends: 10893 [2021-03-10 21:19:15,692 INFO L226 Difference]: Without dead ends: 10887 [2021-03-10 21:19:15,693 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3384 ImplicationChecksByTransitivity, 2618.3ms TimeCoverageRelationStatistics Valid=3090, Invalid=7416, Unknown=0, NotChecked=0, Total=10506 [2021-03-10 21:19:15,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10887 states. [2021-03-10 21:19:15,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10887 to 9443. [2021-03-10 21:19:15,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9443 states, 9442 states have (on average 3.133869942808727) internal successors, (29590), 9442 states have internal predecessors, (29590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:15,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9443 states to 9443 states and 29590 transitions. [2021-03-10 21:19:15,862 INFO L78 Accepts]: Start accepts. Automaton has 9443 states and 29590 transitions. Word has length 24 [2021-03-10 21:19:15,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:15,862 INFO L480 AbstractCegarLoop]: Abstraction has 9443 states and 29590 transitions. [2021-03-10 21:19:15,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 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) [2021-03-10 21:19:15,862 INFO L276 IsEmpty]: Start isEmpty. Operand 9443 states and 29590 transitions. [2021-03-10 21:19:15,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:19:15,875 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:15,875 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:16,075 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable646 [2021-03-10 21:19:16,075 INFO L428 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:16,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:16,076 INFO L82 PathProgramCache]: Analyzing trace with hash 2137010703, now seen corresponding path program 354 times [2021-03-10 21:19:16,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:16,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058778332] [2021-03-10 21:19:16,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:16,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:16,197 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:19:16,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058778332] [2021-03-10 21:19:16,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955969502] [2021-03-10 21:19:16,198 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:16,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:19:16,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:16,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:19:16,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:16,749 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:16,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:16,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 23 [2021-03-10 21:19:16,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347363664] [2021-03-10 21:19:16,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:19:16,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:16,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:19:16,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:19:16,750 INFO L87 Difference]: Start difference. First operand 9443 states and 29590 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 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) [2021-03-10 21:19:19,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:19,647 INFO L93 Difference]: Finished difference Result 10963 states and 33243 transitions. [2021-03-10 21:19:19,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-03-10 21:19:19,649 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 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 24 [2021-03-10 21:19:19,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:19,669 INFO L225 Difference]: With dead ends: 10963 [2021-03-10 21:19:19,669 INFO L226 Difference]: Without dead ends: 10955 [2021-03-10 21:19:19,670 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3015 ImplicationChecksByTransitivity, 2707.3ms TimeCoverageRelationStatistics Valid=2700, Invalid=6806, Unknown=0, NotChecked=0, Total=9506 [2021-03-10 21:19:19,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10955 states. [2021-03-10 21:19:19,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10955 to 9488. [2021-03-10 21:19:19,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9488 states, 9487 states have (on average 3.1347106566880996) internal successors, (29739), 9487 states have internal predecessors, (29739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:19,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9488 states to 9488 states and 29739 transitions. [2021-03-10 21:19:19,843 INFO L78 Accepts]: Start accepts. Automaton has 9488 states and 29739 transitions. Word has length 24 [2021-03-10 21:19:19,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:19,843 INFO L480 AbstractCegarLoop]: Abstraction has 9488 states and 29739 transitions. [2021-03-10 21:19:19,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 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) [2021-03-10 21:19:19,843 INFO L276 IsEmpty]: Start isEmpty. Operand 9488 states and 29739 transitions. [2021-03-10 21:19:19,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:19:19,855 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:19,855 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:20,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable647,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:20,056 INFO L428 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:20,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:20,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1095434635, now seen corresponding path program 355 times [2021-03-10 21:19:20,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:20,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041736480] [2021-03-10 21:19:20,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:20,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:20,207 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:19:20,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041736480] [2021-03-10 21:19:20,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816899360] [2021-03-10 21:19:20,208 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:20,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:20,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:19:20,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:20,676 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:20,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:20,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 24 [2021-03-10 21:19:20,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132820996] [2021-03-10 21:19:20,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:19:20,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:20,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:19:20,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:19:20,677 INFO L87 Difference]: Start difference. First operand 9488 states and 29739 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 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) [2021-03-10 21:19:23,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:23,448 INFO L93 Difference]: Finished difference Result 11074 states and 33620 transitions. [2021-03-10 21:19:23,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-03-10 21:19:23,451 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 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 24 [2021-03-10 21:19:23,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:23,469 INFO L225 Difference]: With dead ends: 11074 [2021-03-10 21:19:23,469 INFO L226 Difference]: Without dead ends: 11062 [2021-03-10 21:19:23,469 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2753 ImplicationChecksByTransitivity, 2565.2ms TimeCoverageRelationStatistics Valid=2410, Invalid=6332, Unknown=0, NotChecked=0, Total=8742 [2021-03-10 21:19:23,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11062 states. [2021-03-10 21:19:23,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11062 to 9716. [2021-03-10 21:19:23,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9716 states, 9715 states have (on average 3.138548636129696) internal successors, (30491), 9715 states have internal predecessors, (30491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:23,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9716 states to 9716 states and 30491 transitions. [2021-03-10 21:19:23,634 INFO L78 Accepts]: Start accepts. Automaton has 9716 states and 30491 transitions. Word has length 24 [2021-03-10 21:19:23,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:23,635 INFO L480 AbstractCegarLoop]: Abstraction has 9716 states and 30491 transitions. [2021-03-10 21:19:23,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 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) [2021-03-10 21:19:23,635 INFO L276 IsEmpty]: Start isEmpty. Operand 9716 states and 30491 transitions. [2021-03-10 21:19:23,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:19:23,648 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:23,648 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:23,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable648 [2021-03-10 21:19:23,849 INFO L428 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:23,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:23,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1128652401, now seen corresponding path program 356 times [2021-03-10 21:19:23,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:23,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683755392] [2021-03-10 21:19:23,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:23,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:24,019 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:19:24,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683755392] [2021-03-10 21:19:24,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116988624] [2021-03-10 21:19:24,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:24,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:19:24,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:24,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:19:24,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:24,288 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:24,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:24,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 25 [2021-03-10 21:19:24,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606992461] [2021-03-10 21:19:24,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:19:24,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:24,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:19:24,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:19:24,289 INFO L87 Difference]: Start difference. First operand 9716 states and 30491 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 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) [2021-03-10 21:19:26,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:26,764 INFO L93 Difference]: Finished difference Result 11386 states and 34650 transitions. [2021-03-10 21:19:26,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-03-10 21:19:26,767 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 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 24 [2021-03-10 21:19:26,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:26,786 INFO L225 Difference]: With dead ends: 11386 [2021-03-10 21:19:26,786 INFO L226 Difference]: Without dead ends: 11370 [2021-03-10 21:19:26,787 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2580 ImplicationChecksByTransitivity, 2246.1ms TimeCoverageRelationStatistics Valid=2220, Invalid=5970, Unknown=0, NotChecked=0, Total=8190 [2021-03-10 21:19:26,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11370 states. [2021-03-10 21:19:26,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11370 to 9979. [2021-03-10 21:19:26,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9979 states, 9978 states have (on average 3.1449188214070958) internal successors, (31380), 9978 states have internal predecessors, (31380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:26,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9979 states to 9979 states and 31380 transitions. [2021-03-10 21:19:26,952 INFO L78 Accepts]: Start accepts. Automaton has 9979 states and 31380 transitions. Word has length 24 [2021-03-10 21:19:26,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:26,952 INFO L480 AbstractCegarLoop]: Abstraction has 9979 states and 31380 transitions. [2021-03-10 21:19:26,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 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) [2021-03-10 21:19:26,952 INFO L276 IsEmpty]: Start isEmpty. Operand 9979 states and 31380 transitions. [2021-03-10 21:19:26,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:19:26,965 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:26,965 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:27,165 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable649,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:27,165 INFO L428 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:27,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:27,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1355873781, now seen corresponding path program 357 times [2021-03-10 21:19:27,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:27,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337152777] [2021-03-10 21:19:27,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:27,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:27,288 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:27,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337152777] [2021-03-10 21:19:27,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502648052] [2021-03-10 21:19:27,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:27,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:19:27,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:27,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:19:27,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:27,773 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:27,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:27,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2021-03-10 21:19:27,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680295268] [2021-03-10 21:19:27,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 21:19:27,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:27,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 21:19:27,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:19:27,774 INFO L87 Difference]: Start difference. First operand 9979 states and 31380 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) [2021-03-10 21:19:29,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:29,923 INFO L93 Difference]: Finished difference Result 11190 states and 34200 transitions. [2021-03-10 21:19:29,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-03-10 21:19:29,924 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 24 [2021-03-10 21:19:29,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:29,944 INFO L225 Difference]: With dead ends: 11190 [2021-03-10 21:19:29,944 INFO L226 Difference]: Without dead ends: 11170 [2021-03-10 21:19:29,945 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2376 ImplicationChecksByTransitivity, 2082.2ms TimeCoverageRelationStatistics Valid=2129, Invalid=5703, Unknown=0, NotChecked=0, Total=7832 [2021-03-10 21:19:29,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11170 states. [2021-03-10 21:19:30,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11170 to 10023. [2021-03-10 21:19:30,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10023 states, 10022 states have (on average 3.1446817002594294) internal successors, (31516), 10022 states have internal predecessors, (31516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:30,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10023 states to 10023 states and 31516 transitions. [2021-03-10 21:19:30,122 INFO L78 Accepts]: Start accepts. Automaton has 10023 states and 31516 transitions. Word has length 24 [2021-03-10 21:19:30,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:30,122 INFO L480 AbstractCegarLoop]: Abstraction has 10023 states and 31516 transitions. [2021-03-10 21:19:30,122 INFO L481 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) [2021-03-10 21:19:30,122 INFO L276 IsEmpty]: Start isEmpty. Operand 10023 states and 31516 transitions. [2021-03-10 21:19:30,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:19:30,136 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:30,136 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:30,337 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable650 [2021-03-10 21:19:30,337 INFO L428 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:30,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:30,337 INFO L82 PathProgramCache]: Analyzing trace with hash -2144123953, now seen corresponding path program 358 times [2021-03-10 21:19:30,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:30,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367642014] [2021-03-10 21:19:30,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:30,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:30,392 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:30,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367642014] [2021-03-10 21:19:30,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908403100] [2021-03-10 21:19:30,392 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:19:30,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:19:30,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:30,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:19:30,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:30,716 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:30,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:30,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 22 [2021-03-10 21:19:30,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680219458] [2021-03-10 21:19:30,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:19:30,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:30,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:19:30,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:19:30,717 INFO L87 Difference]: Start difference. First operand 10023 states and 31516 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:32,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:32,891 INFO L93 Difference]: Finished difference Result 14250 states and 43629 transitions. [2021-03-10 21:19:32,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-03-10 21:19:32,894 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:19:32,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:32,920 INFO L225 Difference]: With dead ends: 14250 [2021-03-10 21:19:32,920 INFO L226 Difference]: Without dead ends: 14238 [2021-03-10 21:19:32,921 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1555 ImplicationChecksByTransitivity, 1757.9ms TimeCoverageRelationStatistics Valid=1679, Invalid=3151, Unknown=0, NotChecked=0, Total=4830 [2021-03-10 21:19:32,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14238 states. [2021-03-10 21:19:33,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14238 to 11906. [2021-03-10 21:19:33,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11906 states, 11905 states have (on average 3.1850482990340194) internal successors, (37918), 11905 states have internal predecessors, (37918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:33,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11906 states to 11906 states and 37918 transitions. [2021-03-10 21:19:33,179 INFO L78 Accepts]: Start accepts. Automaton has 11906 states and 37918 transitions. Word has length 24 [2021-03-10 21:19:33,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:33,179 INFO L480 AbstractCegarLoop]: Abstraction has 11906 states and 37918 transitions. [2021-03-10 21:19:33,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:33,179 INFO L276 IsEmpty]: Start isEmpty. Operand 11906 states and 37918 transitions. [2021-03-10 21:19:33,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:19:33,195 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:33,195 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:33,395 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable651,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:33,395 INFO L428 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:33,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:33,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1686252239, now seen corresponding path program 359 times [2021-03-10 21:19:33,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:33,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741087969] [2021-03-10 21:19:33,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:33,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:33,501 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:19:33,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741087969] [2021-03-10 21:19:33,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179401899] [2021-03-10 21:19:33,501 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:19:33,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:19:33,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:33,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:19:33,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:33,947 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:33,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:33,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 22 [2021-03-10 21:19:33,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517282263] [2021-03-10 21:19:33,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:19:33,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:33,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:19:33,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:19:33,948 INFO L87 Difference]: Start difference. First operand 11906 states and 37918 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:37,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:37,543 INFO L93 Difference]: Finished difference Result 13468 states and 41406 transitions. [2021-03-10 21:19:37,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-03-10 21:19:37,545 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:19:37,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:37,571 INFO L225 Difference]: With dead ends: 13468 [2021-03-10 21:19:37,571 INFO L226 Difference]: Without dead ends: 13464 [2021-03-10 21:19:37,572 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4938 ImplicationChecksByTransitivity, 3202.4ms TimeCoverageRelationStatistics Valid=3452, Invalid=8980, Unknown=0, NotChecked=0, Total=12432 [2021-03-10 21:19:37,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13464 states. [2021-03-10 21:19:37,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13464 to 11668. [2021-03-10 21:19:37,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11668 states, 11667 states have (on average 3.1784520442273076) internal successors, (37083), 11667 states have internal predecessors, (37083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:37,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11668 states to 11668 states and 37083 transitions. [2021-03-10 21:19:37,791 INFO L78 Accepts]: Start accepts. Automaton has 11668 states and 37083 transitions. Word has length 24 [2021-03-10 21:19:37,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:37,792 INFO L480 AbstractCegarLoop]: Abstraction has 11668 states and 37083 transitions. [2021-03-10 21:19:37,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:37,792 INFO L276 IsEmpty]: Start isEmpty. Operand 11668 states and 37083 transitions. [2021-03-10 21:19:37,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:19:37,809 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:37,809 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:38,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable652 [2021-03-10 21:19:38,009 INFO L428 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:38,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:38,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1652653011, now seen corresponding path program 360 times [2021-03-10 21:19:38,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:38,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795670940] [2021-03-10 21:19:38,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:38,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:38,139 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:19:38,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795670940] [2021-03-10 21:19:38,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484459527] [2021-03-10 21:19:38,139 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:38,159 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:19:38,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:38,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:19:38,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:38,600 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:38,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:38,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 23 [2021-03-10 21:19:38,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168300249] [2021-03-10 21:19:38,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:19:38,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:38,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:19:38,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:19:38,601 INFO L87 Difference]: Start difference. First operand 11668 states and 37083 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:41,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:41,986 INFO L93 Difference]: Finished difference Result 13667 states and 42198 transitions. [2021-03-10 21:19:41,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-03-10 21:19:41,988 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:19:41,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:42,007 INFO L225 Difference]: With dead ends: 13667 [2021-03-10 21:19:42,008 INFO L226 Difference]: Without dead ends: 13659 [2021-03-10 21:19:42,009 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4206 ImplicationChecksByTransitivity, 3126.5ms TimeCoverageRelationStatistics Valid=2955, Invalid=7965, Unknown=0, NotChecked=0, Total=10920 [2021-03-10 21:19:42,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13659 states. [2021-03-10 21:19:42,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13659 to 11875. [2021-03-10 21:19:42,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11875 states, 11874 states have (on average 3.1847734546067037) internal successors, (37816), 11874 states have internal predecessors, (37816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:42,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11875 states to 11875 states and 37816 transitions. [2021-03-10 21:19:42,181 INFO L78 Accepts]: Start accepts. Automaton has 11875 states and 37816 transitions. Word has length 24 [2021-03-10 21:19:42,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:42,181 INFO L480 AbstractCegarLoop]: Abstraction has 11875 states and 37816 transitions. [2021-03-10 21:19:42,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:42,181 INFO L276 IsEmpty]: Start isEmpty. Operand 11875 states and 37816 transitions. [2021-03-10 21:19:42,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:19:42,195 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:42,195 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:42,395 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable653 [2021-03-10 21:19:42,395 INFO L428 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:42,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:42,395 INFO L82 PathProgramCache]: Analyzing trace with hash 611076943, now seen corresponding path program 361 times [2021-03-10 21:19:42,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:42,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888125867] [2021-03-10 21:19:42,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:42,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:42,542 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:19:42,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888125867] [2021-03-10 21:19:42,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258272070] [2021-03-10 21:19:42,542 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:42,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:42,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:19:42,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:43,034 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:43,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:43,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 24 [2021-03-10 21:19:43,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938979357] [2021-03-10 21:19:43,035 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:19:43,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:43,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:19:43,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:19:43,035 INFO L87 Difference]: Start difference. First operand 11875 states and 37816 transitions. Second operand has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:46,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:46,293 INFO L93 Difference]: Finished difference Result 14012 states and 43421 transitions. [2021-03-10 21:19:46,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-03-10 21:19:46,296 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:19:46,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:46,322 INFO L225 Difference]: With dead ends: 14012 [2021-03-10 21:19:46,323 INFO L226 Difference]: Without dead ends: 14000 [2021-03-10 21:19:46,323 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3606 ImplicationChecksByTransitivity, 2930.5ms TimeCoverageRelationStatistics Valid=2546, Invalid=7156, Unknown=0, NotChecked=0, Total=9702 [2021-03-10 21:19:46,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14000 states. [2021-03-10 21:19:46,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14000 to 12230. [2021-03-10 21:19:46,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12230 states, 12229 states have (on average 3.1900400686891817) internal successors, (39011), 12229 states have internal predecessors, (39011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:46,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12230 states to 12230 states and 39011 transitions. [2021-03-10 21:19:46,559 INFO L78 Accepts]: Start accepts. Automaton has 12230 states and 39011 transitions. Word has length 24 [2021-03-10 21:19:46,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:46,559 INFO L480 AbstractCegarLoop]: Abstraction has 12230 states and 39011 transitions. [2021-03-10 21:19:46,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:46,559 INFO L276 IsEmpty]: Start isEmpty. Operand 12230 states and 39011 transitions. [2021-03-10 21:19:46,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:19:46,578 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:46,578 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:46,778 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable654,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:46,778 INFO L428 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:46,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:46,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1613010093, now seen corresponding path program 362 times [2021-03-10 21:19:46,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:46,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37445312] [2021-03-10 21:19:46,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:46,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:46,874 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:19:46,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37445312] [2021-03-10 21:19:46,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795491651] [2021-03-10 21:19:46,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:19:46,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:19:46,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:46,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:19:46,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:47,453 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:47,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:47,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 25 [2021-03-10 21:19:47,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014995207] [2021-03-10 21:19:47,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:19:47,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:47,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:19:47,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:19:47,454 INFO L87 Difference]: Start difference. First operand 12230 states and 39011 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:50,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:50,489 INFO L93 Difference]: Finished difference Result 14528 states and 45137 transitions. [2021-03-10 21:19:50,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-03-10 21:19:50,492 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:19:50,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:50,521 INFO L225 Difference]: With dead ends: 14528 [2021-03-10 21:19:50,521 INFO L226 Difference]: Without dead ends: 14512 [2021-03-10 21:19:50,522 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3124 ImplicationChecksByTransitivity, 2711.4ms TimeCoverageRelationStatistics Valid=2232, Invalid=6510, Unknown=0, NotChecked=0, Total=8742 [2021-03-10 21:19:50,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14512 states. [2021-03-10 21:19:50,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14512 to 13019. [2021-03-10 21:19:50,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13019 states, 13018 states have (on average 3.197649408511292) internal successors, (41627), 13018 states have internal predecessors, (41627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:50,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13019 states to 13019 states and 41627 transitions. [2021-03-10 21:19:50,809 INFO L78 Accepts]: Start accepts. Automaton has 13019 states and 41627 transitions. Word has length 24 [2021-03-10 21:19:50,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:50,810 INFO L480 AbstractCegarLoop]: Abstraction has 13019 states and 41627 transitions. [2021-03-10 21:19:50,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:50,810 INFO L276 IsEmpty]: Start isEmpty. Operand 13019 states and 41627 transitions. [2021-03-10 21:19:50,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:19:50,831 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:50,831 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:51,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable655 [2021-03-10 21:19:51,031 INFO L428 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:51,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:51,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1840231473, now seen corresponding path program 363 times [2021-03-10 21:19:51,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:51,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626727777] [2021-03-10 21:19:51,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:51,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:51,222 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:19:51,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626727777] [2021-03-10 21:19:51,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484806352] [2021-03-10 21:19:51,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:51,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:19:51,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:51,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:19:51,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:51,816 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:51,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:51,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2021-03-10 21:19:51,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457069270] [2021-03-10 21:19:51,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 21:19:51,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:51,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 21:19:51,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:19:51,817 INFO L87 Difference]: Start difference. First operand 13019 states and 41627 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:54,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:54,537 INFO L93 Difference]: Finished difference Result 15354 states and 47888 transitions. [2021-03-10 21:19:54,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-03-10 21:19:54,540 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:19:54,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:54,569 INFO L225 Difference]: With dead ends: 15354 [2021-03-10 21:19:54,569 INFO L226 Difference]: Without dead ends: 15334 [2021-03-10 21:19:54,570 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2762 ImplicationChecksByTransitivity, 2619.8ms TimeCoverageRelationStatistics Valid=2019, Invalid=5991, Unknown=0, NotChecked=0, Total=8010 [2021-03-10 21:19:54,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15334 states. [2021-03-10 21:19:54,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15334 to 13814. [2021-03-10 21:19:54,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13814 states, 13813 states have (on average 3.2055310215014843) internal successors, (44278), 13813 states have internal predecessors, (44278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:54,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13814 states to 13814 states and 44278 transitions. [2021-03-10 21:19:54,777 INFO L78 Accepts]: Start accepts. Automaton has 13814 states and 44278 transitions. Word has length 24 [2021-03-10 21:19:54,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:54,777 INFO L480 AbstractCegarLoop]: Abstraction has 13814 states and 44278 transitions. [2021-03-10 21:19:54,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:54,777 INFO L276 IsEmpty]: Start isEmpty. Operand 13814 states and 44278 transitions. [2021-03-10 21:19:54,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:19:54,793 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:54,793 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:54,993 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable656,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:54,993 INFO L428 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:54,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:54,994 INFO L82 PathProgramCache]: Analyzing trace with hash -294159661, now seen corresponding path program 364 times [2021-03-10 21:19:54,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:54,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063322486] [2021-03-10 21:19:54,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:54,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:55,213 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:55,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063322486] [2021-03-10 21:19:55,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976211843] [2021-03-10 21:19:55,214 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 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 [2021-03-10 21:19:55,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:19:55,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:55,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:19:55,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:55,687 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:55,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:55,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-03-10 21:19:55,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833995056] [2021-03-10 21:19:55,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 21:19:55,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:55,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 21:19:55,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:19:55,688 INFO L87 Difference]: Start difference. First operand 13814 states and 44278 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:58,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:58,135 INFO L93 Difference]: Finished difference Result 15273 states and 47830 transitions. [2021-03-10 21:19:58,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-03-10 21:19:58,138 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:19:58,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:58,169 INFO L225 Difference]: With dead ends: 15273 [2021-03-10 21:19:58,170 INFO L226 Difference]: Without dead ends: 15249 [2021-03-10 21:19:58,170 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2434 ImplicationChecksByTransitivity, 2262.6ms TimeCoverageRelationStatistics Valid=1912, Invalid=5570, Unknown=0, NotChecked=0, Total=7482 [2021-03-10 21:19:58,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15249 states. [2021-03-10 21:19:58,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15249 to 13872. [2021-03-10 21:19:58,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13872 states, 13871 states have (on average 3.205248359887535) internal successors, (44460), 13871 states have internal predecessors, (44460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:58,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13872 states to 13872 states and 44460 transitions. [2021-03-10 21:19:58,402 INFO L78 Accepts]: Start accepts. Automaton has 13872 states and 44460 transitions. Word has length 24 [2021-03-10 21:19:58,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:58,402 INFO L480 AbstractCegarLoop]: Abstraction has 13872 states and 44460 transitions. [2021-03-10 21:19:58,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:58,402 INFO L276 IsEmpty]: Start isEmpty. Operand 13872 states and 44460 transitions. [2021-03-10 21:19:58,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:19:58,425 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:58,425 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:58,625 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable657 [2021-03-10 21:19:58,625 INFO L428 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:58,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:58,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1105251501, now seen corresponding path program 365 times [2021-03-10 21:19:58,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:58,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712184333] [2021-03-10 21:19:58,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:58,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:58,841 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:58,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712184333] [2021-03-10 21:19:58,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074837767] [2021-03-10 21:19:58,842 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:58,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:19:58,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:58,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:19:58,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:59,220 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:59,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:59,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-03-10 21:19:59,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705691615] [2021-03-10 21:19:59,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:19:59,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:59,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:19:59,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:19:59,221 INFO L87 Difference]: Start difference. First operand 13872 states and 44460 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 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) [2021-03-10 21:19:59,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:59,558 INFO L93 Difference]: Finished difference Result 16092 states and 50859 transitions. [2021-03-10 21:19:59,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:19:59,559 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 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 24 [2021-03-10 21:19:59,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:59,587 INFO L225 Difference]: With dead ends: 16092 [2021-03-10 21:19:59,587 INFO L226 Difference]: Without dead ends: 16092 [2021-03-10 21:19:59,587 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 476.2ms TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:19:59,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16092 states. [2021-03-10 21:19:59,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16092 to 13964. [2021-03-10 21:19:59,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13964 states, 13963 states have (on average 3.2041108644274154) internal successors, (44739), 13963 states have internal predecessors, (44739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:59,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13964 states to 13964 states and 44739 transitions. [2021-03-10 21:19:59,854 INFO L78 Accepts]: Start accepts. Automaton has 13964 states and 44739 transitions. Word has length 24 [2021-03-10 21:19:59,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:59,854 INFO L480 AbstractCegarLoop]: Abstraction has 13964 states and 44739 transitions. [2021-03-10 21:19:59,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 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) [2021-03-10 21:19:59,854 INFO L276 IsEmpty]: Start isEmpty. Operand 13964 states and 44739 transitions. [2021-03-10 21:19:59,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:19:59,876 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:59,876 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:20:00,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable658,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:00,076 INFO L428 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:20:00,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:20:00,076 INFO L82 PathProgramCache]: Analyzing trace with hash -299012217, now seen corresponding path program 366 times [2021-03-10 21:20:00,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:20:00,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029149257] [2021-03-10 21:20:00,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:20:00,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:00,362 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:00,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029149257] [2021-03-10 21:20:00,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130973957] [2021-03-10 21:20:00,362 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:00,383 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:20:00,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:20:00,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:20:00,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:20:00,776 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:00,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:20:00,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-03-10 21:20:00,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683725761] [2021-03-10 21:20:00,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:20:00,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:20:00,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:20:00,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:20:00,776 INFO L87 Difference]: Start difference. First operand 13964 states and 44739 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:01,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:20:01,424 INFO L93 Difference]: Finished difference Result 14987 states and 47521 transitions. [2021-03-10 21:20:01,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:20:01,425 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:20:01,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:20:01,454 INFO L225 Difference]: With dead ends: 14987 [2021-03-10 21:20:01,454 INFO L226 Difference]: Without dead ends: 14987 [2021-03-10 21:20:01,454 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 772.4ms TimeCoverageRelationStatistics Valid=418, Invalid=842, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 21:20:01,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14987 states. [2021-03-10 21:20:01,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14987 to 14007. [2021-03-10 21:20:01,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14007 states, 14006 states have (on average 3.203484221048122) internal successors, (44868), 14006 states have internal predecessors, (44868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:01,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14007 states to 14007 states and 44868 transitions. [2021-03-10 21:20:01,736 INFO L78 Accepts]: Start accepts. Automaton has 14007 states and 44868 transitions. Word has length 24 [2021-03-10 21:20:01,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:20:01,736 INFO L480 AbstractCegarLoop]: Abstraction has 14007 states and 44868 transitions. [2021-03-10 21:20:01,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:01,736 INFO L276 IsEmpty]: Start isEmpty. Operand 14007 states and 44868 transitions. [2021-03-10 21:20:01,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:20:01,760 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:20:01,761 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:20:01,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable659,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:01,975 INFO L428 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:20:01,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:20:01,975 INFO L82 PathProgramCache]: Analyzing trace with hash 549610255, now seen corresponding path program 367 times [2021-03-10 21:20:01,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:20:01,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780449315] [2021-03-10 21:20:01,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:20:01,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:02,255 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:02,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780449315] [2021-03-10 21:20:02,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439078046] [2021-03-10 21:20:02,256 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:02,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:02,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:20:02,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:20:02,730 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:02,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:20:02,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-03-10 21:20:02,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981450552] [2021-03-10 21:20:02,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:20:02,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:20:02,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:20:02,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:20:02,731 INFO L87 Difference]: Start difference. First operand 14007 states and 44868 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:04,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:20:04,116 INFO L93 Difference]: Finished difference Result 15501 states and 48982 transitions. [2021-03-10 21:20:04,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 21:20:04,118 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:20:04,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:20:04,150 INFO L225 Difference]: With dead ends: 15501 [2021-03-10 21:20:04,150 INFO L226 Difference]: Without dead ends: 15501 [2021-03-10 21:20:04,150 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 1064.6ms TimeCoverageRelationStatistics Valid=677, Invalid=1393, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 21:20:04,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15501 states. [2021-03-10 21:20:04,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15501 to 14056. [2021-03-10 21:20:04,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14056 states, 14055 states have (on average 3.2027748132337246) internal successors, (45015), 14055 states have internal predecessors, (45015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:04,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14056 states to 14056 states and 45015 transitions. [2021-03-10 21:20:04,508 INFO L78 Accepts]: Start accepts. Automaton has 14056 states and 45015 transitions. Word has length 24 [2021-03-10 21:20:04,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:20:04,509 INFO L480 AbstractCegarLoop]: Abstraction has 14056 states and 45015 transitions. [2021-03-10 21:20:04,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:04,509 INFO L276 IsEmpty]: Start isEmpty. Operand 14056 states and 45015 transitions. [2021-03-10 21:20:04,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:20:04,531 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:20:04,531 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:20:04,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable660 [2021-03-10 21:20:04,732 INFO L428 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:20:04,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:20:04,732 INFO L82 PathProgramCache]: Analyzing trace with hash -2055414137, now seen corresponding path program 368 times [2021-03-10 21:20:04,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:20:04,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726161084] [2021-03-10 21:20:04,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:20:04,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:04,962 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:04,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726161084] [2021-03-10 21:20:04,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847885458] [2021-03-10 21:20:04,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:04,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:20:04,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:20:04,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:20:04,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:20:05,383 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:05,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:20:05,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-03-10 21:20:05,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420322190] [2021-03-10 21:20:05,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:20:05,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:20:05,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:20:05,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:20:05,384 INFO L87 Difference]: Start difference. First operand 14056 states and 45015 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:07,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:20:07,335 INFO L93 Difference]: Finished difference Result 15602 states and 49176 transitions. [2021-03-10 21:20:07,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-03-10 21:20:07,337 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:20:07,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:20:07,370 INFO L225 Difference]: With dead ends: 15602 [2021-03-10 21:20:07,370 INFO L226 Difference]: Without dead ends: 15602 [2021-03-10 21:20:07,370 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 1591.6ms TimeCoverageRelationStatistics Valid=1179, Invalid=2361, Unknown=0, NotChecked=0, Total=3540 [2021-03-10 21:20:07,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15602 states. [2021-03-10 21:20:07,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15602 to 14172. [2021-03-10 21:20:07,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14172 states, 14171 states have (on average 3.2011149530731777) internal successors, (45363), 14171 states have internal predecessors, (45363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:07,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14172 states to 14172 states and 45363 transitions. [2021-03-10 21:20:07,634 INFO L78 Accepts]: Start accepts. Automaton has 14172 states and 45363 transitions. Word has length 24 [2021-03-10 21:20:07,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:20:07,635 INFO L480 AbstractCegarLoop]: Abstraction has 14172 states and 45363 transitions. [2021-03-10 21:20:07,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:07,635 INFO L276 IsEmpty]: Start isEmpty. Operand 14172 states and 45363 transitions. [2021-03-10 21:20:07,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:20:07,658 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:20:07,658 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:20:07,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 372 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable661 [2021-03-10 21:20:07,863 INFO L428 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:20:07,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:20:07,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1169615857, now seen corresponding path program 369 times [2021-03-10 21:20:07,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:20:07,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204274893] [2021-03-10 21:20:07,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:20:07,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:07,966 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:07,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204274893] [2021-03-10 21:20:07,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366010855] [2021-03-10 21:20:07,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:07,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:20:07,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:20:07,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:20:07,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:20:08,344 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:08,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:20:08,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-03-10 21:20:08,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066784628] [2021-03-10 21:20:08,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:20:08,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:20:08,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:20:08,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:20:08,345 INFO L87 Difference]: Start difference. First operand 14172 states and 45363 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:11,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:20:11,079 INFO L93 Difference]: Finished difference Result 15707 states and 49378 transitions. [2021-03-10 21:20:11,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-03-10 21:20:11,081 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:20:11,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:20:11,114 INFO L225 Difference]: With dead ends: 15707 [2021-03-10 21:20:11,115 INFO L226 Difference]: Without dead ends: 15707 [2021-03-10 21:20:11,115 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1396 ImplicationChecksByTransitivity, 2116.8ms TimeCoverageRelationStatistics Valid=1756, Invalid=3500, Unknown=0, NotChecked=0, Total=5256 [2021-03-10 21:20:11,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15707 states. [2021-03-10 21:20:11,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15707 to 14281. [2021-03-10 21:20:11,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14281 states, 14280 states have (on average 3.1997198879551823) internal successors, (45692), 14280 states have internal predecessors, (45692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:11,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14281 states to 14281 states and 45692 transitions. [2021-03-10 21:20:11,396 INFO L78 Accepts]: Start accepts. Automaton has 14281 states and 45692 transitions. Word has length 24 [2021-03-10 21:20:11,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:20:11,396 INFO L480 AbstractCegarLoop]: Abstraction has 14281 states and 45692 transitions. [2021-03-10 21:20:11,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:11,396 INFO L276 IsEmpty]: Start isEmpty. Operand 14281 states and 45692 transitions. [2021-03-10 21:20:11,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:20:11,421 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:20:11,421 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:20:11,621 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable662 [2021-03-10 21:20:11,622 INFO L428 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:20:11,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:20:11,626 INFO L82 PathProgramCache]: Analyzing trace with hash 937168263, now seen corresponding path program 370 times [2021-03-10 21:20:11,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:20:11,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233388384] [2021-03-10 21:20:11,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:20:11,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:11,869 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:11,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233388384] [2021-03-10 21:20:11,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521631669] [2021-03-10 21:20:11,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:20:11,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:20:11,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:20:11,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:20:11,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:12,364 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:12,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:20:12,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-03-10 21:20:12,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736762950] [2021-03-10 21:20:12,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:20:12,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:20:12,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:20:12,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:20:12,365 INFO L87 Difference]: Start difference. First operand 14281 states and 45692 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:15,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:20:15,383 INFO L93 Difference]: Finished difference Result 15913 states and 49910 transitions. [2021-03-10 21:20:15,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-03-10 21:20:15,386 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:20:15,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:20:15,420 INFO L225 Difference]: With dead ends: 15913 [2021-03-10 21:20:15,420 INFO L226 Difference]: Without dead ends: 15913 [2021-03-10 21:20:15,421 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1658 ImplicationChecksByTransitivity, 2471.8ms TimeCoverageRelationStatistics Valid=2091, Invalid=4071, Unknown=0, NotChecked=0, Total=6162 [2021-03-10 21:20:15,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15913 states. [2021-03-10 21:20:15,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15913 to 14413. [2021-03-10 21:20:15,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14413 states, 14412 states have (on average 3.1991396058839854) internal successors, (46106), 14412 states have internal predecessors, (46106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:15,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14413 states to 14413 states and 46106 transitions. [2021-03-10 21:20:15,744 INFO L78 Accepts]: Start accepts. Automaton has 14413 states and 46106 transitions. Word has length 24 [2021-03-10 21:20:15,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:20:15,744 INFO L480 AbstractCegarLoop]: Abstraction has 14413 states and 46106 transitions. [2021-03-10 21:20:15,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:15,745 INFO L276 IsEmpty]: Start isEmpty. Operand 14413 states and 46106 transitions. [2021-03-10 21:20:15,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:20:15,768 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:20:15,768 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:20:15,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable663 [2021-03-10 21:20:15,968 INFO L428 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:20:15,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:20:15,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1211628273, now seen corresponding path program 371 times [2021-03-10 21:20:15,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:20:15,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690363495] [2021-03-10 21:20:15,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:20:15,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:16,197 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:16,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690363495] [2021-03-10 21:20:16,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690242167] [2021-03-10 21:20:16,197 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 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 [2021-03-10 21:20:16,221 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:20:16,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:20:16,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:20:16,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:20:16,645 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:16,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:20:16,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-03-10 21:20:16,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9114804] [2021-03-10 21:20:16,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:20:16,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:20:16,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:20:16,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:20:16,646 INFO L87 Difference]: Start difference. First operand 14413 states and 46106 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:19,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:20:19,516 INFO L93 Difference]: Finished difference Result 16226 states and 50863 transitions. [2021-03-10 21:20:19,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-03-10 21:20:19,518 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:20:19,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:20:19,552 INFO L225 Difference]: With dead ends: 16226 [2021-03-10 21:20:19,552 INFO L226 Difference]: Without dead ends: 16226 [2021-03-10 21:20:19,553 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 2391.2ms TimeCoverageRelationStatistics Valid=2135, Invalid=3871, Unknown=0, NotChecked=0, Total=6006 [2021-03-10 21:20:19,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16226 states. [2021-03-10 21:20:19,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16226 to 14455. [2021-03-10 21:20:19,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14455 states, 14454 states have (on average 3.204649232046492) internal successors, (46320), 14454 states have internal predecessors, (46320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:19,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14455 states to 14455 states and 46320 transitions. [2021-03-10 21:20:19,788 INFO L78 Accepts]: Start accepts. Automaton has 14455 states and 46320 transitions. Word has length 24 [2021-03-10 21:20:19,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:20:19,789 INFO L480 AbstractCegarLoop]: Abstraction has 14455 states and 46320 transitions. [2021-03-10 21:20:19,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:19,789 INFO L276 IsEmpty]: Start isEmpty. Operand 14455 states and 46320 transitions. [2021-03-10 21:20:19,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:20:19,812 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:20:19,812 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:20:20,013 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 375 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable664 [2021-03-10 21:20:20,013 INFO L428 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:20:20,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:20:20,013 INFO L82 PathProgramCache]: Analyzing trace with hash -640173467, now seen corresponding path program 372 times [2021-03-10 21:20:20,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:20:20,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013160816] [2021-03-10 21:20:20,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:20:20,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:20,234 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:20,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013160816] [2021-03-10 21:20:20,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111964140] [2021-03-10 21:20:20,235 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:20,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:20:20,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:20:20,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:20:20,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:20:20,703 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:20,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:20:20,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-03-10 21:20:20,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288110971] [2021-03-10 21:20:20,703 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:20:20,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:20:20,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:20:20,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=312, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:20:20,704 INFO L87 Difference]: Start difference. First operand 14455 states and 46320 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:23,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:20:23,521 INFO L93 Difference]: Finished difference Result 15474 states and 48762 transitions. [2021-03-10 21:20:23,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-03-10 21:20:23,523 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:20:23,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:20:23,555 INFO L225 Difference]: With dead ends: 15474 [2021-03-10 21:20:23,555 INFO L226 Difference]: Without dead ends: 15468 [2021-03-10 21:20:23,556 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1945 ImplicationChecksByTransitivity, 2544.4ms TimeCoverageRelationStatistics Valid=2587, Invalid=4895, Unknown=0, NotChecked=0, Total=7482 [2021-03-10 21:20:23,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15468 states. [2021-03-10 21:20:23,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15468 to 13787. [2021-03-10 21:20:23,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13787 states, 13786 states have (on average 3.198752357464094) internal successors, (44098), 13786 states have internal predecessors, (44098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:23,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13787 states to 13787 states and 44098 transitions. [2021-03-10 21:20:23,805 INFO L78 Accepts]: Start accepts. Automaton has 13787 states and 44098 transitions. Word has length 24 [2021-03-10 21:20:23,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:20:23,805 INFO L480 AbstractCegarLoop]: Abstraction has 13787 states and 44098 transitions. [2021-03-10 21:20:23,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:23,805 INFO L276 IsEmpty]: Start isEmpty. Operand 13787 states and 44098 transitions. [2021-03-10 21:20:23,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:20:23,822 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:20:23,822 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:20:24,022 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable665 [2021-03-10 21:20:24,022 INFO L428 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:20:24,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:20:24,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1723222283, now seen corresponding path program 373 times [2021-03-10 21:20:24,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:20:24,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733700900] [2021-03-10 21:20:24,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:20:24,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:24,232 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:24,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733700900] [2021-03-10 21:20:24,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936022540] [2021-03-10 21:20:24,232 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:24,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:24,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:20:24,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:20:24,724 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:24,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:20:24,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-03-10 21:20:24,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955390915] [2021-03-10 21:20:24,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:20:24,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:20:24,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:20:24,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:20:24,725 INFO L87 Difference]: Start difference. First operand 13787 states and 44098 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:27,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:20:27,142 INFO L93 Difference]: Finished difference Result 17863 states and 56145 transitions. [2021-03-10 21:20:27,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-03-10 21:20:27,144 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:20:27,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:20:27,169 INFO L225 Difference]: With dead ends: 17863 [2021-03-10 21:20:27,170 INFO L226 Difference]: Without dead ends: 17848 [2021-03-10 21:20:27,170 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 2100.2ms TimeCoverageRelationStatistics Valid=1502, Invalid=3190, Unknown=0, NotChecked=0, Total=4692 [2021-03-10 21:20:27,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17848 states. [2021-03-10 21:20:27,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17848 to 15969. [2021-03-10 21:20:27,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15969 states, 15968 states have (on average 3.2116107214428857) internal successors, (51283), 15968 states have internal predecessors, (51283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:27,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15969 states to 15969 states and 51283 transitions. [2021-03-10 21:20:27,454 INFO L78 Accepts]: Start accepts. Automaton has 15969 states and 51283 transitions. Word has length 24 [2021-03-10 21:20:27,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:20:27,454 INFO L480 AbstractCegarLoop]: Abstraction has 15969 states and 51283 transitions. [2021-03-10 21:20:27,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:27,455 INFO L276 IsEmpty]: Start isEmpty. Operand 15969 states and 51283 transitions. [2021-03-10 21:20:27,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:20:27,474 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:20:27,474 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:20:27,674 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 377 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable666 [2021-03-10 21:20:27,674 INFO L428 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:20:27,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:20:27,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1258631179, now seen corresponding path program 374 times [2021-03-10 21:20:27,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:20:27,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906430753] [2021-03-10 21:20:27,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:20:27,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:27,791 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:27,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906430753] [2021-03-10 21:20:27,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114141] [2021-03-10 21:20:27,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:27,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:20:27,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:20:27,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:20:27,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:20:28,035 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:28,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:20:28,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-03-10 21:20:28,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285474430] [2021-03-10 21:20:28,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:20:28,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:20:28,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:20:28,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:20:28,036 INFO L87 Difference]: Start difference. First operand 15969 states and 51283 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) [2021-03-10 21:20:30,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:20:30,666 INFO L93 Difference]: Finished difference Result 17633 states and 55417 transitions. [2021-03-10 21:20:30,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-03-10 21:20:30,669 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 24 [2021-03-10 21:20:30,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:20:30,706 INFO L225 Difference]: With dead ends: 17633 [2021-03-10 21:20:30,706 INFO L226 Difference]: Without dead ends: 17629 [2021-03-10 21:20:30,707 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1707 ImplicationChecksByTransitivity, 2018.8ms TimeCoverageRelationStatistics Valid=1386, Invalid=4314, Unknown=0, NotChecked=0, Total=5700 [2021-03-10 21:20:30,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17629 states. [2021-03-10 21:20:30,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17629 to 15243. [2021-03-10 21:20:30,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15243 states, 15242 states have (on average 3.1953811835717096) internal successors, (48704), 15242 states have internal predecessors, (48704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:31,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15243 states to 15243 states and 48704 transitions. [2021-03-10 21:20:31,012 INFO L78 Accepts]: Start accepts. Automaton has 15243 states and 48704 transitions. Word has length 24 [2021-03-10 21:20:31,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:20:31,012 INFO L480 AbstractCegarLoop]: Abstraction has 15243 states and 48704 transitions. [2021-03-10 21:20:31,012 INFO L481 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) [2021-03-10 21:20:31,012 INFO L276 IsEmpty]: Start isEmpty. Operand 15243 states and 48704 transitions. [2021-03-10 21:20:31,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:20:31,037 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:20:31,037 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:20:31,237 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable667 [2021-03-10 21:20:31,238 INFO L428 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:20:31,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:20:31,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1225031951, now seen corresponding path program 375 times [2021-03-10 21:20:31,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:20:31,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504815811] [2021-03-10 21:20:31,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:20:31,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:31,451 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:31,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504815811] [2021-03-10 21:20:31,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529127104] [2021-03-10 21:20:31,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:31,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:20:31,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:20:31,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:20:31,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:20:32,071 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:32,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:20:32,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-03-10 21:20:32,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204932315] [2021-03-10 21:20:32,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:20:32,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:20:32,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:20:32,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:20:32,072 INFO L87 Difference]: Start difference. First operand 15243 states and 48704 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) [2021-03-10 21:20:34,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:20:34,373 INFO L93 Difference]: Finished difference Result 17307 states and 54169 transitions. [2021-03-10 21:20:34,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-03-10 21:20:34,376 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 24 [2021-03-10 21:20:34,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:20:34,412 INFO L225 Difference]: With dead ends: 17307 [2021-03-10 21:20:34,412 INFO L226 Difference]: Without dead ends: 17299 [2021-03-10 21:20:34,413 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1538 ImplicationChecksByTransitivity, 2084.9ms TimeCoverageRelationStatistics Valid=1185, Invalid=3927, Unknown=0, NotChecked=0, Total=5112 [2021-03-10 21:20:34,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17299 states. [2021-03-10 21:20:34,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17299 to 15525. [2021-03-10 21:20:34,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15525 states, 15524 states have (on average 3.1944730739500127) internal successors, (49591), 15524 states have internal predecessors, (49591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:34,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15525 states to 15525 states and 49591 transitions. [2021-03-10 21:20:34,719 INFO L78 Accepts]: Start accepts. Automaton has 15525 states and 49591 transitions. Word has length 24 [2021-03-10 21:20:34,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:20:34,719 INFO L480 AbstractCegarLoop]: Abstraction has 15525 states and 49591 transitions. [2021-03-10 21:20:34,719 INFO L481 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) [2021-03-10 21:20:34,720 INFO L276 IsEmpty]: Start isEmpty. Operand 15525 states and 49591 transitions. [2021-03-10 21:20:34,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:20:34,745 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:20:34,745 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:20:34,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable668,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:34,945 INFO L428 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:20:34,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:20:34,945 INFO L82 PathProgramCache]: Analyzing trace with hash 183455883, now seen corresponding path program 376 times [2021-03-10 21:20:34,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:20:34,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849341645] [2021-03-10 21:20:34,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:20:34,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:35,165 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:35,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849341645] [2021-03-10 21:20:35,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727529683] [2021-03-10 21:20:35,165 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:20:35,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:20:35,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:20:35,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:20:35,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:20:35,643 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:35,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:20:35,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-03-10 21:20:35,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569261214] [2021-03-10 21:20:35,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:20:35,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:20:35,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:20:35,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:20:35,644 INFO L87 Difference]: Start difference. First operand 15525 states and 49591 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) [2021-03-10 21:20:37,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:20:37,716 INFO L93 Difference]: Finished difference Result 17843 states and 55959 transitions. [2021-03-10 21:20:37,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-03-10 21:20:37,719 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 24 [2021-03-10 21:20:37,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:20:37,743 INFO L225 Difference]: With dead ends: 17843 [2021-03-10 21:20:37,743 INFO L226 Difference]: Without dead ends: 17831 [2021-03-10 21:20:37,744 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 1901.6ms TimeCoverageRelationStatistics Valid=1016, Invalid=3540, Unknown=0, NotChecked=0, Total=4556 [2021-03-10 21:20:37,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17831 states. [2021-03-10 21:20:37,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17831 to 15785. [2021-03-10 21:20:37,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15785 states, 15784 states have (on average 3.192663456664977) internal successors, (50393), 15784 states have internal predecessors, (50393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:38,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15785 states to 15785 states and 50393 transitions. [2021-03-10 21:20:38,011 INFO L78 Accepts]: Start accepts. Automaton has 15785 states and 50393 transitions. Word has length 24 [2021-03-10 21:20:38,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:20:38,011 INFO L480 AbstractCegarLoop]: Abstraction has 15785 states and 50393 transitions. [2021-03-10 21:20:38,011 INFO L481 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) [2021-03-10 21:20:38,011 INFO L276 IsEmpty]: Start isEmpty. Operand 15785 states and 50393 transitions. [2021-03-10 21:20:38,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:20:38,036 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:20:38,036 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:20:38,237 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable669,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:38,237 INFO L428 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:20:38,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:20:38,237 INFO L82 PathProgramCache]: Analyzing trace with hash -2040631153, now seen corresponding path program 377 times [2021-03-10 21:20:38,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:20:38,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688194884] [2021-03-10 21:20:38,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:20:38,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:38,459 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:38,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688194884] [2021-03-10 21:20:38,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522830712] [2021-03-10 21:20:38,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:38,480 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:20:38,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:20:38,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:20:38,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:20:38,963 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:38,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:20:38,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-03-10 21:20:38,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010203255] [2021-03-10 21:20:38,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:20:38,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:20:38,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:20:38,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:20:38,964 INFO L87 Difference]: Start difference. First operand 15785 states and 50393 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) [2021-03-10 21:20:40,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:20:40,926 INFO L93 Difference]: Finished difference Result 18546 states and 58331 transitions. [2021-03-10 21:20:40,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-03-10 21:20:40,929 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 24 [2021-03-10 21:20:40,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:20:40,970 INFO L225 Difference]: With dead ends: 18546 [2021-03-10 21:20:40,970 INFO L226 Difference]: Without dead ends: 18530 [2021-03-10 21:20:40,970 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 1819.1ms TimeCoverageRelationStatistics Valid=880, Invalid=3152, Unknown=0, NotChecked=0, Total=4032 [2021-03-10 21:20:40,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18530 states. [2021-03-10 21:20:41,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18530 to 15941. [2021-03-10 21:20:41,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15941 states, 15940 states have (on average 3.1888331242158094) internal successors, (50830), 15940 states have internal predecessors, (50830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:41,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15941 states to 15941 states and 50830 transitions. [2021-03-10 21:20:41,259 INFO L78 Accepts]: Start accepts. Automaton has 15941 states and 50830 transitions. Word has length 24 [2021-03-10 21:20:41,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:20:41,259 INFO L480 AbstractCegarLoop]: Abstraction has 15941 states and 50830 transitions. [2021-03-10 21:20:41,259 INFO L481 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) [2021-03-10 21:20:41,259 INFO L276 IsEmpty]: Start isEmpty. Operand 15941 states and 50830 transitions. [2021-03-10 21:20:41,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:20:41,278 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:20:41,278 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:20:41,478 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable670,381 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:41,479 INFO L428 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:20:41,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:20:41,479 INFO L82 PathProgramCache]: Analyzing trace with hash 2027114763, now seen corresponding path program 378 times [2021-03-10 21:20:41,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:20:41,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918517866] [2021-03-10 21:20:41,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:20:41,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:41,667 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:41,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918517866] [2021-03-10 21:20:41,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749151166] [2021-03-10 21:20:41,668 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:41,688 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:20:41,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:20:41,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:20:41,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:20:41,916 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:41,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:20:41,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-03-10 21:20:41,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713242773] [2021-03-10 21:20:41,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:20:41,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:20:41,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:20:41,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:20:41,917 INFO L87 Difference]: Start difference. First operand 15941 states and 50830 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) [2021-03-10 21:20:43,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:20:43,649 INFO L93 Difference]: Finished difference Result 18841 states and 59191 transitions. [2021-03-10 21:20:43,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-10 21:20:43,652 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 24 [2021-03-10 21:20:43,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:20:43,693 INFO L225 Difference]: With dead ends: 18841 [2021-03-10 21:20:43,693 INFO L226 Difference]: Without dead ends: 18821 [2021-03-10 21:20:43,693 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 1560.2ms TimeCoverageRelationStatistics Valid=778, Invalid=2762, Unknown=0, NotChecked=0, Total=3540 [2021-03-10 21:20:43,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18821 states. [2021-03-10 21:20:43,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18821 to 15970. [2021-03-10 21:20:43,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15970 states, 15969 states have (on average 3.1873003945143714) internal successors, (50898), 15969 states have internal predecessors, (50898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:44,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15970 states to 15970 states and 50898 transitions. [2021-03-10 21:20:44,004 INFO L78 Accepts]: Start accepts. Automaton has 15970 states and 50898 transitions. Word has length 24 [2021-03-10 21:20:44,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:20:44,004 INFO L480 AbstractCegarLoop]: Abstraction has 15970 states and 50898 transitions. [2021-03-10 21:20:44,004 INFO L481 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) [2021-03-10 21:20:44,005 INFO L276 IsEmpty]: Start isEmpty. Operand 15970 states and 50898 transitions. [2021-03-10 21:20:44,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:20:44,023 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:20:44,024 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:20:44,224 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable671,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:44,224 INFO L428 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:20:44,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:20:44,224 INFO L82 PathProgramCache]: Analyzing trace with hash -721780721, now seen corresponding path program 379 times [2021-03-10 21:20:44,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:20:44,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105317207] [2021-03-10 21:20:44,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:20:44,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:44,462 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:44,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105317207] [2021-03-10 21:20:44,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526909767] [2021-03-10 21:20:44,462 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:44,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:44,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:20:44,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:20:44,952 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:44,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:20:44,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-03-10 21:20:44,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283101167] [2021-03-10 21:20:44,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:20:44,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:20:44,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:20:44,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:20:44,953 INFO L87 Difference]: Start difference. First operand 15970 states and 50898 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) [2021-03-10 21:20:46,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:20:46,446 INFO L93 Difference]: Finished difference Result 17288 states and 54299 transitions. [2021-03-10 21:20:46,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 21:20:46,449 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 24 [2021-03-10 21:20:46,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:20:46,486 INFO L225 Difference]: With dead ends: 17288 [2021-03-10 21:20:46,486 INFO L226 Difference]: Without dead ends: 17276 [2021-03-10 21:20:46,487 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 1518.1ms TimeCoverageRelationStatistics Valid=591, Invalid=1959, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 21:20:46,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17276 states. [2021-03-10 21:20:46,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17276 to 15970. [2021-03-10 21:20:46,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15970 states, 15969 states have (on average 3.186924666541424) internal successors, (50892), 15969 states have internal predecessors, (50892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:46,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15970 states to 15970 states and 50892 transitions. [2021-03-10 21:20:46,839 INFO L78 Accepts]: Start accepts. Automaton has 15970 states and 50892 transitions. Word has length 24 [2021-03-10 21:20:46,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:20:46,839 INFO L480 AbstractCegarLoop]: Abstraction has 15970 states and 50892 transitions. [2021-03-10 21:20:46,839 INFO L481 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) [2021-03-10 21:20:46,840 INFO L276 IsEmpty]: Start isEmpty. Operand 15970 states and 50892 transitions. [2021-03-10 21:20:46,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:20:46,865 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:20:46,865 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:20:47,067 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable672 [2021-03-10 21:20:47,067 INFO L428 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:20:47,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:20:47,067 INFO L82 PathProgramCache]: Analyzing trace with hash -731252469, now seen corresponding path program 380 times [2021-03-10 21:20:47,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:20:47,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440979440] [2021-03-10 21:20:47,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:20:47,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:47,218 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:47,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440979440] [2021-03-10 21:20:47,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047090734] [2021-03-10 21:20:47,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:47,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:20:47,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:20:47,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:20:47,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:20:47,670 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:47,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:20:47,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-03-10 21:20:47,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869499363] [2021-03-10 21:20:47,671 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:20:47,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:20:47,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:20:47,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:20:47,671 INFO L87 Difference]: Start difference. First operand 15970 states and 50892 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 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) [2021-03-10 21:20:48,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:20:48,206 INFO L93 Difference]: Finished difference Result 17070 states and 53913 transitions. [2021-03-10 21:20:48,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:20:48,209 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 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 24 [2021-03-10 21:20:48,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:20:48,245 INFO L225 Difference]: With dead ends: 17070 [2021-03-10 21:20:48,245 INFO L226 Difference]: Without dead ends: 17056 [2021-03-10 21:20:48,245 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 693.7ms TimeCoverageRelationStatistics Valid=287, Invalid=835, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:20:48,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17056 states. [2021-03-10 21:20:48,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17056 to 15970. [2021-03-10 21:20:48,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15970 states, 15969 states have (on average 3.1868620452125995) internal successors, (50891), 15969 states have internal predecessors, (50891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:48,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15970 states to 15970 states and 50891 transitions. [2021-03-10 21:20:48,548 INFO L78 Accepts]: Start accepts. Automaton has 15970 states and 50891 transitions. Word has length 24 [2021-03-10 21:20:48,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:20:48,548 INFO L480 AbstractCegarLoop]: Abstraction has 15970 states and 50891 transitions. [2021-03-10 21:20:48,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 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) [2021-03-10 21:20:48,548 INFO L276 IsEmpty]: Start isEmpty. Operand 15970 states and 50891 transitions. [2021-03-10 21:20:48,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:20:48,573 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:20:48,573 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:20:48,774 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable673 [2021-03-10 21:20:48,774 INFO L428 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:20:48,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:20:48,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1075398189, now seen corresponding path program 381 times [2021-03-10 21:20:48,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:20:48,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761966850] [2021-03-10 21:20:48,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:20:48,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:48,894 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:48,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761966850] [2021-03-10 21:20:48,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295811438] [2021-03-10 21:20:48,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:20:48,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:20:48,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:20:48,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:20:48,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:20:49,391 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:49,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:20:49,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-03-10 21:20:49,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419644026] [2021-03-10 21:20:49,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:20:49,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:20:49,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:20:49,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:20:49,392 INFO L87 Difference]: Start difference. First operand 15970 states and 50891 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 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) [2021-03-10 21:20:51,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:20:51,049 INFO L93 Difference]: Finished difference Result 17305 states and 54554 transitions. [2021-03-10 21:20:51,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-03-10 21:20:51,051 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 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 24 [2021-03-10 21:20:51,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:20:51,082 INFO L225 Difference]: With dead ends: 17305 [2021-03-10 21:20:51,083 INFO L226 Difference]: Without dead ends: 17305 [2021-03-10 21:20:51,083 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 1349.1ms TimeCoverageRelationStatistics Valid=1224, Invalid=2558, Unknown=0, NotChecked=0, Total=3782 [2021-03-10 21:20:51,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17305 states. [2021-03-10 21:20:51,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17305 to 16020. [2021-03-10 21:20:51,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16020 states, 16019 states have (on average 3.1862787939322055) internal successors, (51041), 16019 states have internal predecessors, (51041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:51,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16020 states to 16020 states and 51041 transitions. [2021-03-10 21:20:51,329 INFO L78 Accepts]: Start accepts. Automaton has 16020 states and 51041 transitions. Word has length 24 [2021-03-10 21:20:51,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:20:51,329 INFO L480 AbstractCegarLoop]: Abstraction has 16020 states and 51041 transitions. [2021-03-10 21:20:51,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 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) [2021-03-10 21:20:51,329 INFO L276 IsEmpty]: Start isEmpty. Operand 16020 states and 51041 transitions. [2021-03-10 21:20:51,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:20:51,348 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:20:51,348 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:20:51,551 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable674,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:51,551 INFO L428 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:20:51,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:20:51,551 INFO L82 PathProgramCache]: Analyzing trace with hash 310717139, now seen corresponding path program 382 times [2021-03-10 21:20:51,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:20:51,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001375863] [2021-03-10 21:20:51,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:20:51,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:51,668 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:51,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001375863] [2021-03-10 21:20:51,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035284574] [2021-03-10 21:20:51,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:20:51,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:20:51,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:20:51,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:20:51,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:20:51,913 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:51,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:20:51,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-03-10 21:20:51,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577253259] [2021-03-10 21:20:51,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:20:51,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:20:51,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:20:51,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:20:51,914 INFO L87 Difference]: Start difference. First operand 16020 states and 51041 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) [2021-03-10 21:20:52,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:20:52,926 INFO L93 Difference]: Finished difference Result 17722 states and 55602 transitions. [2021-03-10 21:20:52,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 21:20:52,928 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 24 [2021-03-10 21:20:52,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:20:52,954 INFO L225 Difference]: With dead ends: 17722 [2021-03-10 21:20:52,954 INFO L226 Difference]: Without dead ends: 17708 [2021-03-10 21:20:52,954 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 872.7ms TimeCoverageRelationStatistics Valid=944, Invalid=2026, Unknown=0, NotChecked=0, Total=2970 [2021-03-10 21:20:52,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17708 states. [2021-03-10 21:20:53,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17708 to 16053. [2021-03-10 21:20:53,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16053 states, 16052 states have (on average 3.185771243458759) internal successors, (51138), 16052 states have internal predecessors, (51138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:53,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16053 states to 16053 states and 51138 transitions. [2021-03-10 21:20:53,208 INFO L78 Accepts]: Start accepts. Automaton has 16053 states and 51138 transitions. Word has length 24 [2021-03-10 21:20:53,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:20:53,208 INFO L480 AbstractCegarLoop]: Abstraction has 16053 states and 51138 transitions. [2021-03-10 21:20:53,208 INFO L481 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) [2021-03-10 21:20:53,208 INFO L276 IsEmpty]: Start isEmpty. Operand 16053 states and 51138 transitions. [2021-03-10 21:20:53,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:20:53,227 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:20:53,227 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:20:53,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable675 [2021-03-10 21:20:53,428 INFO L428 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:20:53,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:20:53,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1445684781, now seen corresponding path program 383 times [2021-03-10 21:20:53,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:20:53,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918781635] [2021-03-10 21:20:53,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:20:53,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:53,543 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:53,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918781635] [2021-03-10 21:20:53,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776432785] [2021-03-10 21:20:53,544 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:53,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:20:53,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:20:53,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:20:53,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:20:53,869 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:53,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:20:53,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-03-10 21:20:53,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675217156] [2021-03-10 21:20:53,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:20:53,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:20:53,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:20:53,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:20:53,870 INFO L87 Difference]: Start difference. First operand 16053 states and 51138 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) [2021-03-10 21:20:54,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:20:54,895 INFO L93 Difference]: Finished difference Result 17524 states and 54984 transitions. [2021-03-10 21:20:54,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 21:20:54,896 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 24 [2021-03-10 21:20:54,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:20:54,924 INFO L225 Difference]: With dead ends: 17524 [2021-03-10 21:20:54,924 INFO L226 Difference]: Without dead ends: 17506 [2021-03-10 21:20:54,924 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 847.2ms TimeCoverageRelationStatistics Valid=862, Invalid=1894, Unknown=0, NotChecked=0, Total=2756 [2021-03-10 21:20:54,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17506 states. [2021-03-10 21:20:55,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17506 to 16094. [2021-03-10 21:20:55,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16094 states, 16093 states have (on average 3.1848008450879264) internal successors, (51253), 16093 states have internal predecessors, (51253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:55,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16094 states to 16094 states and 51253 transitions. [2021-03-10 21:20:55,178 INFO L78 Accepts]: Start accepts. Automaton has 16094 states and 51253 transitions. Word has length 24 [2021-03-10 21:20:55,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:20:55,178 INFO L480 AbstractCegarLoop]: Abstraction has 16094 states and 51253 transitions. [2021-03-10 21:20:55,178 INFO L481 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) [2021-03-10 21:20:55,178 INFO L276 IsEmpty]: Start isEmpty. Operand 16094 states and 51253 transitions. [2021-03-10 21:20:55,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:20:55,197 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:20:55,197 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:20:55,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable676,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:55,398 INFO L428 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:20:55,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:20:55,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1130056403, now seen corresponding path program 384 times [2021-03-10 21:20:55,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:20:55,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233570653] [2021-03-10 21:20:55,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:20:55,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:55,505 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:55,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233570653] [2021-03-10 21:20:55,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716498229] [2021-03-10 21:20:55,506 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:55,525 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:20:55,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:20:55,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:20:55,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:20:55,760 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:55,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:20:55,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-03-10 21:20:55,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430828829] [2021-03-10 21:20:55,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:20:55,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:20:55,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:20:55,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:20:55,761 INFO L87 Difference]: Start difference. First operand 16094 states and 51253 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) [2021-03-10 21:20:57,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:20:57,347 INFO L93 Difference]: Finished difference Result 17741 states and 55478 transitions. [2021-03-10 21:20:57,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-03-10 21:20:57,349 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 24 [2021-03-10 21:20:57,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:20:57,371 INFO L225 Difference]: With dead ends: 17741 [2021-03-10 21:20:57,371 INFO L226 Difference]: Without dead ends: 17731 [2021-03-10 21:20:57,372 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 1164.7ms TimeCoverageRelationStatistics Valid=1433, Invalid=2989, Unknown=0, NotChecked=0, Total=4422 [2021-03-10 21:20:57,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17731 states. [2021-03-10 21:20:57,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17731 to 16203. [2021-03-10 21:20:57,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16203 states, 16202 states have (on average 3.1827552154055057) internal successors, (51567), 16202 states have internal predecessors, (51567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:57,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16203 states to 16203 states and 51567 transitions. [2021-03-10 21:20:57,597 INFO L78 Accepts]: Start accepts. Automaton has 16203 states and 51567 transitions. Word has length 24 [2021-03-10 21:20:57,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:20:57,597 INFO L480 AbstractCegarLoop]: Abstraction has 16203 states and 51567 transitions. [2021-03-10 21:20:57,598 INFO L481 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) [2021-03-10 21:20:57,598 INFO L276 IsEmpty]: Start isEmpty. Operand 16203 states and 51567 transitions. [2021-03-10 21:20:57,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:20:57,617 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:20:57,617 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:20:57,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable677 [2021-03-10 21:20:57,818 INFO L428 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:20:57,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:20:57,818 INFO L82 PathProgramCache]: Analyzing trace with hash -172328493, now seen corresponding path program 385 times [2021-03-10 21:20:57,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:20:57,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9742084] [2021-03-10 21:20:57,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:20:57,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:57,923 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:57,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9742084] [2021-03-10 21:20:57,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688583453] [2021-03-10 21:20:57,923 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:57,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:57,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:20:57,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:20:58,162 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:58,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:20:58,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-03-10 21:20:58,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699912095] [2021-03-10 21:20:58,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:20:58,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:20:58,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:20:58,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:20:58,163 INFO L87 Difference]: Start difference. First operand 16203 states and 51567 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) [2021-03-10 21:20:59,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:20:59,804 INFO L93 Difference]: Finished difference Result 18351 states and 57209 transitions. [2021-03-10 21:20:59,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-03-10 21:20:59,806 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 24 [2021-03-10 21:20:59,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:20:59,831 INFO L225 Difference]: With dead ends: 18351 [2021-03-10 21:20:59,831 INFO L226 Difference]: Without dead ends: 18347 [2021-03-10 21:20:59,832 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1426 ImplicationChecksByTransitivity, 1307.3ms TimeCoverageRelationStatistics Valid=1920, Invalid=3780, Unknown=0, NotChecked=0, Total=5700 [2021-03-10 21:20:59,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18347 states. [2021-03-10 21:21:00,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18347 to 16270. [2021-03-10 21:21:00,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16270 states, 16269 states have (on average 3.1803429835884196) internal successors, (51741), 16269 states have internal predecessors, (51741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:00,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16270 states to 16270 states and 51741 transitions. [2021-03-10 21:21:00,132 INFO L78 Accepts]: Start accepts. Automaton has 16270 states and 51741 transitions. Word has length 24 [2021-03-10 21:21:00,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:00,132 INFO L480 AbstractCegarLoop]: Abstraction has 16270 states and 51741 transitions. [2021-03-10 21:21:00,132 INFO L481 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) [2021-03-10 21:21:00,132 INFO L276 IsEmpty]: Start isEmpty. Operand 16270 states and 51741 transitions. [2021-03-10 21:21:00,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:21:00,152 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:00,153 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:00,353 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable678,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:00,353 INFO L428 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:00,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:00,353 INFO L82 PathProgramCache]: Analyzing trace with hash -214340909, now seen corresponding path program 386 times [2021-03-10 21:21:00,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:00,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368864077] [2021-03-10 21:21:00,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:00,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:00,456 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:00,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368864077] [2021-03-10 21:21:00,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115616425] [2021-03-10 21:21:00,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:21:00,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:21:00,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:00,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:21:00,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:00,698 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:00,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:00,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-03-10 21:21:00,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824317652] [2021-03-10 21:21:00,698 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:21:00,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:00,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:21:00,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:21:00,699 INFO L87 Difference]: Start difference. First operand 16270 states and 51741 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) [2021-03-10 21:21:02,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:02,379 INFO L93 Difference]: Finished difference Result 18812 states and 58615 transitions. [2021-03-10 21:21:02,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-03-10 21:21:02,381 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 24 [2021-03-10 21:21:02,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:02,409 INFO L225 Difference]: With dead ends: 18812 [2021-03-10 21:21:02,409 INFO L226 Difference]: Without dead ends: 18812 [2021-03-10 21:21:02,410 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 1360.3ms TimeCoverageRelationStatistics Valid=2017, Invalid=3683, Unknown=0, NotChecked=0, Total=5700 [2021-03-10 21:21:02,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18812 states. [2021-03-10 21:21:02,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18812 to 16419. [2021-03-10 21:21:02,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16419 states, 16418 states have (on average 3.188451699354367) internal successors, (52348), 16418 states have internal predecessors, (52348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:02,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16419 states to 16419 states and 52348 transitions. [2021-03-10 21:21:02,674 INFO L78 Accepts]: Start accepts. Automaton has 16419 states and 52348 transitions. Word has length 24 [2021-03-10 21:21:02,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:02,674 INFO L480 AbstractCegarLoop]: Abstraction has 16419 states and 52348 transitions. [2021-03-10 21:21:02,674 INFO L481 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) [2021-03-10 21:21:02,674 INFO L276 IsEmpty]: Start isEmpty. Operand 16419 states and 52348 transitions. [2021-03-10 21:21:02,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:21:02,694 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:02,694 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:02,894 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable679 [2021-03-10 21:21:02,894 INFO L428 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:02,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:02,894 INFO L82 PathProgramCache]: Analyzing trace with hash 357113897, now seen corresponding path program 387 times [2021-03-10 21:21:02,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:02,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345158511] [2021-03-10 21:21:02,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:02,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:03,003 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:21:03,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345158511] [2021-03-10 21:21:03,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561325425] [2021-03-10 21:21:03,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:03,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:21:03,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:03,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:21:03,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:03,265 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:03,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:03,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-03-10 21:21:03,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745141132] [2021-03-10 21:21:03,265 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:21:03,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:03,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:21:03,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:21:03,266 INFO L87 Difference]: Start difference. First operand 16419 states and 52348 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) [2021-03-10 21:21:05,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:05,223 INFO L93 Difference]: Finished difference Result 17894 states and 55882 transitions. [2021-03-10 21:21:05,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-03-10 21:21:05,225 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 24 [2021-03-10 21:21:05,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:05,250 INFO L225 Difference]: With dead ends: 17894 [2021-03-10 21:21:05,251 INFO L226 Difference]: Without dead ends: 17879 [2021-03-10 21:21:05,251 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1989 ImplicationChecksByTransitivity, 1671.2ms TimeCoverageRelationStatistics Valid=2525, Invalid=5131, Unknown=0, NotChecked=0, Total=7656 [2021-03-10 21:21:05,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17879 states. [2021-03-10 21:21:05,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17879 to 15868. [2021-03-10 21:21:05,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15868 states, 15867 states have (on average 3.1803743618831537) internal successors, (50463), 15867 states have internal predecessors, (50463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:05,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15868 states to 15868 states and 50463 transitions. [2021-03-10 21:21:05,501 INFO L78 Accepts]: Start accepts. Automaton has 15868 states and 50463 transitions. Word has length 24 [2021-03-10 21:21:05,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:05,501 INFO L480 AbstractCegarLoop]: Abstraction has 15868 states and 50463 transitions. [2021-03-10 21:21:05,501 INFO L481 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) [2021-03-10 21:21:05,501 INFO L276 IsEmpty]: Start isEmpty. Operand 15868 states and 50463 transitions. [2021-03-10 21:21:05,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:21:05,521 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:05,521 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:05,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable680,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:05,721 INFO L428 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:05,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:05,722 INFO L82 PathProgramCache]: Analyzing trace with hash 892343699, now seen corresponding path program 388 times [2021-03-10 21:21:05,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:05,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781358010] [2021-03-10 21:21:05,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:05,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:05,859 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:05,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781358010] [2021-03-10 21:21:05,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708158677] [2021-03-10 21:21:05,859 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:21:05,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:21:05,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:05,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:21:05,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:06,144 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:06,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:06,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-03-10 21:21:06,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343788718] [2021-03-10 21:21:06,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:21:06,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:06,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:21:06,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:21:06,145 INFO L87 Difference]: Start difference. First operand 15868 states and 50463 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 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) [2021-03-10 21:21:07,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:07,867 INFO L93 Difference]: Finished difference Result 17262 states and 53968 transitions. [2021-03-10 21:21:07,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-03-10 21:21:07,869 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 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 24 [2021-03-10 21:21:07,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:07,895 INFO L225 Difference]: With dead ends: 17262 [2021-03-10 21:21:07,895 INFO L226 Difference]: Without dead ends: 17250 [2021-03-10 21:21:07,896 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2152 ImplicationChecksByTransitivity, 1500.5ms TimeCoverageRelationStatistics Valid=2548, Invalid=5284, Unknown=0, NotChecked=0, Total=7832 [2021-03-10 21:21:07,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17250 states. [2021-03-10 21:21:08,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17250 to 15928. [2021-03-10 21:21:08,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15928 states, 15927 states have (on average 3.1800087901048535) internal successors, (50648), 15927 states have internal predecessors, (50648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:08,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15928 states to 15928 states and 50648 transitions. [2021-03-10 21:21:08,177 INFO L78 Accepts]: Start accepts. Automaton has 15928 states and 50648 transitions. Word has length 24 [2021-03-10 21:21:08,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:08,177 INFO L480 AbstractCegarLoop]: Abstraction has 15928 states and 50648 transitions. [2021-03-10 21:21:08,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 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) [2021-03-10 21:21:08,177 INFO L276 IsEmpty]: Start isEmpty. Operand 15928 states and 50648 transitions. [2021-03-10 21:21:08,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:21:08,197 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:08,197 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:08,397 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable681,392 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:08,397 INFO L428 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:08,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:08,397 INFO L82 PathProgramCache]: Analyzing trace with hash 626440455, now seen corresponding path program 389 times [2021-03-10 21:21:08,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:08,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085649193] [2021-03-10 21:21:08,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:08,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:08,513 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:08,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085649193] [2021-03-10 21:21:08,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662919374] [2021-03-10 21:21:08,513 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:08,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:21:08,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:08,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:21:08,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:08,811 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:08,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:08,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-03-10 21:21:08,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16959226] [2021-03-10 21:21:08,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:21:08,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:08,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:21:08,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:21:08,812 INFO L87 Difference]: Start difference. First operand 15928 states and 50648 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:10,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:10,251 INFO L93 Difference]: Finished difference Result 17178 states and 53993 transitions. [2021-03-10 21:21:10,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-10 21:21:10,253 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:21:10,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:10,279 INFO L225 Difference]: With dead ends: 17178 [2021-03-10 21:21:10,279 INFO L226 Difference]: Without dead ends: 17178 [2021-03-10 21:21:10,280 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1337 ImplicationChecksByTransitivity, 1147.8ms TimeCoverageRelationStatistics Valid=1411, Invalid=3145, Unknown=0, NotChecked=0, Total=4556 [2021-03-10 21:21:10,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17178 states. [2021-03-10 21:21:10,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17178 to 15887. [2021-03-10 21:21:10,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15887 states, 15886 states have (on average 3.1804733727810652) internal successors, (50525), 15886 states have internal predecessors, (50525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:10,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15887 states to 15887 states and 50525 transitions. [2021-03-10 21:21:10,530 INFO L78 Accepts]: Start accepts. Automaton has 15887 states and 50525 transitions. Word has length 24 [2021-03-10 21:21:10,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:10,530 INFO L480 AbstractCegarLoop]: Abstraction has 15887 states and 50525 transitions. [2021-03-10 21:21:10,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:10,530 INFO L276 IsEmpty]: Start isEmpty. Operand 15887 states and 50525 transitions. [2021-03-10 21:21:10,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:21:10,549 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:10,549 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:10,750 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable682,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:10,750 INFO L428 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:10,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:10,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1494965135, now seen corresponding path program 390 times [2021-03-10 21:21:10,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:10,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629566381] [2021-03-10 21:21:10,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:10,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:10,861 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:10,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629566381] [2021-03-10 21:21:10,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906056166] [2021-03-10 21:21:10,861 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 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 [2021-03-10 21:21:10,881 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:21:10,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:10,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:21:10,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:11,145 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:11,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:11,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-03-10 21:21:11,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396944599] [2021-03-10 21:21:11,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:21:11,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:11,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:21:11,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:21:11,146 INFO L87 Difference]: Start difference. First operand 15887 states and 50525 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:12,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:12,377 INFO L93 Difference]: Finished difference Result 17298 states and 54207 transitions. [2021-03-10 21:21:12,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-10 21:21:12,379 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:21:12,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:12,457 INFO L225 Difference]: With dead ends: 17298 [2021-03-10 21:21:12,457 INFO L226 Difference]: Without dead ends: 17284 [2021-03-10 21:21:12,458 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 1039.6ms TimeCoverageRelationStatistics Valid=1112, Invalid=2548, Unknown=0, NotChecked=0, Total=3660 [2021-03-10 21:21:12,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17284 states. [2021-03-10 21:21:12,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17284 to 15888. [2021-03-10 21:21:12,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15888 states, 15887 states have (on average 3.180147290237301) internal successors, (50523), 15887 states have internal predecessors, (50523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:12,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15888 states to 15888 states and 50523 transitions. [2021-03-10 21:21:12,677 INFO L78 Accepts]: Start accepts. Automaton has 15888 states and 50523 transitions. Word has length 24 [2021-03-10 21:21:12,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:12,677 INFO L480 AbstractCegarLoop]: Abstraction has 15888 states and 50523 transitions. [2021-03-10 21:21:12,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:12,678 INFO L276 IsEmpty]: Start isEmpty. Operand 15888 states and 50523 transitions. [2021-03-10 21:21:12,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:21:12,697 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:12,697 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:12,897 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable683 [2021-03-10 21:21:12,897 INFO L428 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:12,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:12,898 INFO L82 PathProgramCache]: Analyzing trace with hash 276056071, now seen corresponding path program 391 times [2021-03-10 21:21:12,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:12,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514744043] [2021-03-10 21:21:12,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:12,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:12,989 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:12,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514744043] [2021-03-10 21:21:12,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496361052] [2021-03-10 21:21:12,989 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:13,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:13,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:21:13,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:13,260 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:13,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:13,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-03-10 21:21:13,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624936931] [2021-03-10 21:21:13,260 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:21:13,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:13,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:21:13,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:21:13,261 INFO L87 Difference]: Start difference. First operand 15888 states and 50523 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:14,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:14,631 INFO L93 Difference]: Finished difference Result 17783 states and 55482 transitions. [2021-03-10 21:21:14,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-03-10 21:21:14,633 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:21:14,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:14,659 INFO L225 Difference]: With dead ends: 17783 [2021-03-10 21:21:14,659 INFO L226 Difference]: Without dead ends: 17773 [2021-03-10 21:21:14,660 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 1036.3ms TimeCoverageRelationStatistics Valid=1178, Invalid=2604, Unknown=0, NotChecked=0, Total=3782 [2021-03-10 21:21:14,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17773 states. [2021-03-10 21:21:14,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17773 to 16003. [2021-03-10 21:21:14,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16003 states, 16002 states have (on average 3.1781652293463316) internal successors, (50857), 16002 states have internal predecessors, (50857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:14,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16003 states to 16003 states and 50857 transitions. [2021-03-10 21:21:14,907 INFO L78 Accepts]: Start accepts. Automaton has 16003 states and 50857 transitions. Word has length 24 [2021-03-10 21:21:14,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:14,907 INFO L480 AbstractCegarLoop]: Abstraction has 16003 states and 50857 transitions. [2021-03-10 21:21:14,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:14,907 INFO L276 IsEmpty]: Start isEmpty. Operand 16003 states and 50857 transitions. [2021-03-10 21:21:14,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:21:14,925 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:14,925 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:15,126 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable684,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:15,126 INFO L428 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:15,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:15,126 INFO L82 PathProgramCache]: Analyzing trace with hash -594547569, now seen corresponding path program 392 times [2021-03-10 21:21:15,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:15,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257312336] [2021-03-10 21:21:15,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:15,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:15,224 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:15,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257312336] [2021-03-10 21:21:15,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587501479] [2021-03-10 21:21:15,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:15,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:21:15,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:15,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:21:15,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:15,499 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:15,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:15,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-03-10 21:21:15,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238642353] [2021-03-10 21:21:15,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:21:15,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:15,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:21:15,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:21:15,500 INFO L87 Difference]: Start difference. First operand 16003 states and 50857 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:16,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:16,865 INFO L93 Difference]: Finished difference Result 17914 states and 55910 transitions. [2021-03-10 21:21:16,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-03-10 21:21:16,867 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:21:16,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:16,894 INFO L225 Difference]: With dead ends: 17914 [2021-03-10 21:21:16,894 INFO L226 Difference]: Without dead ends: 17904 [2021-03-10 21:21:16,895 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1143.2ms TimeCoverageRelationStatistics Valid=1233, Invalid=2549, Unknown=0, NotChecked=0, Total=3782 [2021-03-10 21:21:16,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17904 states. [2021-03-10 21:21:17,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17904 to 16144. [2021-03-10 21:21:17,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16144 states, 16143 states have (on average 3.1767329492659355) internal successors, (51282), 16143 states have internal predecessors, (51282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:17,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16144 states to 16144 states and 51282 transitions. [2021-03-10 21:21:17,150 INFO L78 Accepts]: Start accepts. Automaton has 16144 states and 51282 transitions. Word has length 24 [2021-03-10 21:21:17,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:17,150 INFO L480 AbstractCegarLoop]: Abstraction has 16144 states and 51282 transitions. [2021-03-10 21:21:17,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:17,150 INFO L276 IsEmpty]: Start isEmpty. Operand 16144 states and 51282 transitions. [2021-03-10 21:21:17,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:21:17,170 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:17,170 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:17,370 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 396 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable685 [2021-03-10 21:21:17,371 INFO L428 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:17,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:17,371 INFO L82 PathProgramCache]: Analyzing trace with hash -206989561, now seen corresponding path program 393 times [2021-03-10 21:21:17,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:17,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586573358] [2021-03-10 21:21:17,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:17,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:17,468 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:17,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586573358] [2021-03-10 21:21:17,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40632869] [2021-03-10 21:21:17,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:17,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:21:17,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:17,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:21:17,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:17,742 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:17,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:17,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-03-10 21:21:17,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190095926] [2021-03-10 21:21:17,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:21:17,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:17,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:21:17,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:21:17,742 INFO L87 Difference]: Start difference. First operand 16144 states and 51282 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:19,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:19,387 INFO L93 Difference]: Finished difference Result 18800 states and 58404 transitions. [2021-03-10 21:21:19,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-03-10 21:21:19,389 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:21:19,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:19,418 INFO L225 Difference]: With dead ends: 18800 [2021-03-10 21:21:19,418 INFO L226 Difference]: Without dead ends: 18796 [2021-03-10 21:21:19,419 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 1315.5ms TimeCoverageRelationStatistics Valid=1723, Invalid=3389, Unknown=0, NotChecked=0, Total=5112 [2021-03-10 21:21:19,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18796 states. [2021-03-10 21:21:19,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18796 to 16306. [2021-03-10 21:21:19,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16306 states, 16305 states have (on average 3.176448942042318) internal successors, (51792), 16305 states have internal predecessors, (51792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:19,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16306 states to 16306 states and 51792 transitions. [2021-03-10 21:21:19,686 INFO L78 Accepts]: Start accepts. Automaton has 16306 states and 51792 transitions. Word has length 24 [2021-03-10 21:21:19,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:19,686 INFO L480 AbstractCegarLoop]: Abstraction has 16306 states and 51792 transitions. [2021-03-10 21:21:19,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:19,686 INFO L276 IsEmpty]: Start isEmpty. Operand 16306 states and 51792 transitions. [2021-03-10 21:21:19,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:21:19,707 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:19,707 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:19,907 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable686 [2021-03-10 21:21:19,907 INFO L428 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:19,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:19,907 INFO L82 PathProgramCache]: Analyzing trace with hash 636796303, now seen corresponding path program 394 times [2021-03-10 21:21:19,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:19,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701670368] [2021-03-10 21:21:19,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:19,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:20,013 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:20,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701670368] [2021-03-10 21:21:20,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241683194] [2021-03-10 21:21:20,013 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:20,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:21:20,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:20,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:21:20,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:20,382 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:20,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:20,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-03-10 21:21:20,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059552765] [2021-03-10 21:21:20,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:21:20,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:20,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:21:20,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:21:20,383 INFO L87 Difference]: Start difference. First operand 16306 states and 51792 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:22,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:22,134 INFO L93 Difference]: Finished difference Result 19224 states and 59687 transitions. [2021-03-10 21:21:22,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-03-10 21:21:22,136 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:21:22,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:22,166 INFO L225 Difference]: With dead ends: 19224 [2021-03-10 21:21:22,166 INFO L226 Difference]: Without dead ends: 19224 [2021-03-10 21:21:22,167 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1323 ImplicationChecksByTransitivity, 1444.5ms TimeCoverageRelationStatistics Valid=1915, Invalid=3487, Unknown=0, NotChecked=0, Total=5402 [2021-03-10 21:21:22,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19224 states. [2021-03-10 21:21:22,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19224 to 16395. [2021-03-10 21:21:22,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16395 states, 16394 states have (on average 3.1835427595461754) internal successors, (52191), 16394 states have internal predecessors, (52191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:22,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16395 states to 16395 states and 52191 transitions. [2021-03-10 21:21:22,439 INFO L78 Accepts]: Start accepts. Automaton has 16395 states and 52191 transitions. Word has length 24 [2021-03-10 21:21:22,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:22,439 INFO L480 AbstractCegarLoop]: Abstraction has 16395 states and 52191 transitions. [2021-03-10 21:21:22,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:22,439 INFO L276 IsEmpty]: Start isEmpty. Operand 16395 states and 52191 transitions. [2021-03-10 21:21:22,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:21:22,459 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:22,459 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:22,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable687,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:22,660 INFO L428 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:22,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:22,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1208251109, now seen corresponding path program 395 times [2021-03-10 21:21:22,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:22,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129830943] [2021-03-10 21:21:22,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:22,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:22,766 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:21:22,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129830943] [2021-03-10 21:21:22,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738140829] [2021-03-10 21:21:22,766 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:22,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:21:22,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:22,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:21:22,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:23,058 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:23,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:23,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-03-10 21:21:23,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571646486] [2021-03-10 21:21:23,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:21:23,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:23,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:21:23,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:21:23,059 INFO L87 Difference]: Start difference. First operand 16395 states and 52191 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:25,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:25,100 INFO L93 Difference]: Finished difference Result 18347 states and 57068 transitions. [2021-03-10 21:21:25,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-03-10 21:21:25,102 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:21:25,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:25,130 INFO L225 Difference]: With dead ends: 18347 [2021-03-10 21:21:25,130 INFO L226 Difference]: Without dead ends: 18335 [2021-03-10 21:21:25,131 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2217 ImplicationChecksByTransitivity, 1742.4ms TimeCoverageRelationStatistics Valid=2592, Invalid=5598, Unknown=0, NotChecked=0, Total=8190 [2021-03-10 21:21:25,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18335 states. [2021-03-10 21:21:25,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18335 to 16091. [2021-03-10 21:21:25,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16091 states, 16090 states have (on average 3.1781852082038533) internal successors, (51137), 16090 states have internal predecessors, (51137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:25,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16091 states to 16091 states and 51137 transitions. [2021-03-10 21:21:25,419 INFO L78 Accepts]: Start accepts. Automaton has 16091 states and 51137 transitions. Word has length 24 [2021-03-10 21:21:25,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:25,419 INFO L480 AbstractCegarLoop]: Abstraction has 16091 states and 51137 transitions. [2021-03-10 21:21:25,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:25,419 INFO L276 IsEmpty]: Start isEmpty. Operand 16091 states and 51137 transitions. [2021-03-10 21:21:25,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:21:25,438 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:25,438 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:25,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable688 [2021-03-10 21:21:25,643 INFO L428 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:25,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:25,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1743480911, now seen corresponding path program 396 times [2021-03-10 21:21:25,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:25,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194730339] [2021-03-10 21:21:25,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:25,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:25,759 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:21:25,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194730339] [2021-03-10 21:21:25,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583928555] [2021-03-10 21:21:25,760 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:25,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:21:25,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:25,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:21:25,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:26,058 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:26,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:26,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-03-10 21:21:26,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455488848] [2021-03-10 21:21:26,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:21:26,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:26,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:21:26,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:21:26,058 INFO L87 Difference]: Start difference. First operand 16091 states and 51137 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:28,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:28,073 INFO L93 Difference]: Finished difference Result 18125 states and 56330 transitions. [2021-03-10 21:21:28,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-03-10 21:21:28,075 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:21:28,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:28,102 INFO L225 Difference]: With dead ends: 18125 [2021-03-10 21:21:28,102 INFO L226 Difference]: Without dead ends: 18101 [2021-03-10 21:21:28,103 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2250 ImplicationChecksByTransitivity, 1736.7ms TimeCoverageRelationStatistics Valid=2475, Invalid=5535, Unknown=0, NotChecked=0, Total=8010 [2021-03-10 21:21:28,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18101 states. [2021-03-10 21:21:28,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18101 to 15884. [2021-03-10 21:21:28,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15884 states, 15883 states have (on average 3.1798148964301456) internal successors, (50505), 15883 states have internal predecessors, (50505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:28,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15884 states to 15884 states and 50505 transitions. [2021-03-10 21:21:28,358 INFO L78 Accepts]: Start accepts. Automaton has 15884 states and 50505 transitions. Word has length 24 [2021-03-10 21:21:28,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:28,358 INFO L480 AbstractCegarLoop]: Abstraction has 15884 states and 50505 transitions. [2021-03-10 21:21:28,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:28,358 INFO L276 IsEmpty]: Start isEmpty. Operand 15884 states and 50505 transitions. [2021-03-10 21:21:28,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:21:28,378 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:28,378 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:28,578 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable689 [2021-03-10 21:21:28,578 INFO L428 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:28,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:28,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1155735589, now seen corresponding path program 397 times [2021-03-10 21:21:28,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:28,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112065446] [2021-03-10 21:21:28,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:28,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:28,712 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:28,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112065446] [2021-03-10 21:21:28,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744480894] [2021-03-10 21:21:28,712 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:28,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:28,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:21:28,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:29,035 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:29,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:29,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-03-10 21:21:29,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409025094] [2021-03-10 21:21:29,035 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:21:29,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:29,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:21:29,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:21:29,035 INFO L87 Difference]: Start difference. First operand 15884 states and 50505 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:30,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:30,926 INFO L93 Difference]: Finished difference Result 17742 states and 55315 transitions. [2021-03-10 21:21:30,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-03-10 21:21:30,928 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:21:30,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:30,957 INFO L225 Difference]: With dead ends: 17742 [2021-03-10 21:21:30,957 INFO L226 Difference]: Without dead ends: 17724 [2021-03-10 21:21:30,958 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2321 ImplicationChecksByTransitivity, 1602.1ms TimeCoverageRelationStatistics Valid=2455, Invalid=5555, Unknown=0, NotChecked=0, Total=8010 [2021-03-10 21:21:30,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17724 states. [2021-03-10 21:21:31,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17724 to 15928. [2021-03-10 21:21:31,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15928 states, 15927 states have (on average 3.180322722421046) internal successors, (50653), 15927 states have internal predecessors, (50653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:31,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15928 states to 15928 states and 50653 transitions. [2021-03-10 21:21:31,199 INFO L78 Accepts]: Start accepts. Automaton has 15928 states and 50653 transitions. Word has length 24 [2021-03-10 21:21:31,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:31,199 INFO L480 AbstractCegarLoop]: Abstraction has 15928 states and 50653 transitions. [2021-03-10 21:21:31,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:31,199 INFO L276 IsEmpty]: Start isEmpty. Operand 15928 states and 50653 transitions. [2021-03-10 21:21:31,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:21:31,218 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:31,218 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:31,419 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable690,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:31,419 INFO L428 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:31,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:31,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1843830867, now seen corresponding path program 398 times [2021-03-10 21:21:31,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:31,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427684466] [2021-03-10 21:21:31,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:31,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:31,584 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:31,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427684466] [2021-03-10 21:21:31,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907007227] [2021-03-10 21:21:31,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:31,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:21:31,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:31,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:21:31,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:31,942 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:31,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:31,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-03-10 21:21:31,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762119485] [2021-03-10 21:21:31,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:21:31,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:31,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:21:31,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:21:31,943 INFO L87 Difference]: Start difference. First operand 15928 states and 50653 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:33,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:33,593 INFO L93 Difference]: Finished difference Result 16795 states and 52835 transitions. [2021-03-10 21:21:33,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-03-10 21:21:33,595 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:21:33,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:33,619 INFO L225 Difference]: With dead ends: 16795 [2021-03-10 21:21:33,619 INFO L226 Difference]: Without dead ends: 16795 [2021-03-10 21:21:33,620 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1602 ImplicationChecksByTransitivity, 1433.9ms TimeCoverageRelationStatistics Valid=1571, Invalid=3685, Unknown=0, NotChecked=0, Total=5256 [2021-03-10 21:21:33,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16795 states. [2021-03-10 21:21:33,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16795 to 15853. [2021-03-10 21:21:33,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15853 states, 15852 states have (on average 3.181049709815796) internal successors, (50426), 15852 states have internal predecessors, (50426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:33,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15853 states to 15853 states and 50426 transitions. [2021-03-10 21:21:33,911 INFO L78 Accepts]: Start accepts. Automaton has 15853 states and 50426 transitions. Word has length 24 [2021-03-10 21:21:33,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:33,911 INFO L480 AbstractCegarLoop]: Abstraction has 15853 states and 50426 transitions. [2021-03-10 21:21:33,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:33,911 INFO L276 IsEmpty]: Start isEmpty. Operand 15853 states and 50426 transitions. [2021-03-10 21:21:33,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:21:33,930 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:33,930 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:34,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable691,402 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:34,131 INFO L428 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:34,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:34,131 INFO L82 PathProgramCache]: Analyzing trace with hash -448052653, now seen corresponding path program 399 times [2021-03-10 21:21:34,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:34,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575186727] [2021-03-10 21:21:34,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:34,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:34,246 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:34,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575186727] [2021-03-10 21:21:34,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924695746] [2021-03-10 21:21:34,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:34,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:21:34,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:34,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:21:34,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:34,560 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:34,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:34,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2021-03-10 21:21:34,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490933211] [2021-03-10 21:21:34,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:21:34,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:34,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:21:34,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:21:34,561 INFO L87 Difference]: Start difference. First operand 15853 states and 50426 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:35,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:35,998 INFO L93 Difference]: Finished difference Result 16783 states and 52633 transitions. [2021-03-10 21:21:36,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-03-10 21:21:36,000 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:21:36,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:36,026 INFO L225 Difference]: With dead ends: 16783 [2021-03-10 21:21:36,026 INFO L226 Difference]: Without dead ends: 16769 [2021-03-10 21:21:36,026 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1182 ImplicationChecksByTransitivity, 1236.7ms TimeCoverageRelationStatistics Valid=1254, Invalid=3036, Unknown=0, NotChecked=0, Total=4290 [2021-03-10 21:21:36,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16769 states. [2021-03-10 21:21:36,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16769 to 15761. [2021-03-10 21:21:36,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15761 states, 15760 states have (on average 3.1805837563451775) internal successors, (50126), 15760 states have internal predecessors, (50126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:36,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15761 states to 15761 states and 50126 transitions. [2021-03-10 21:21:36,273 INFO L78 Accepts]: Start accepts. Automaton has 15761 states and 50126 transitions. Word has length 24 [2021-03-10 21:21:36,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:36,273 INFO L480 AbstractCegarLoop]: Abstraction has 15761 states and 50126 transitions. [2021-03-10 21:21:36,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:36,273 INFO L276 IsEmpty]: Start isEmpty. Operand 15761 states and 50126 transitions. [2021-03-10 21:21:36,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:21:36,292 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:36,293 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:36,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable692,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:36,493 INFO L428 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:36,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:36,493 INFO L82 PathProgramCache]: Analyzing trace with hash 2110414931, now seen corresponding path program 400 times [2021-03-10 21:21:36,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:36,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326221182] [2021-03-10 21:21:36,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:36,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:36,591 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:36,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326221182] [2021-03-10 21:21:36,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938574369] [2021-03-10 21:21:36,591 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:36,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:21:36,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:36,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:21:36,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:36,889 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:36,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:36,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 23 [2021-03-10 21:21:36,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045854203] [2021-03-10 21:21:36,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:21:36,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:36,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:21:36,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:21:36,890 INFO L87 Difference]: Start difference. First operand 15761 states and 50126 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:38,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:38,380 INFO L93 Difference]: Finished difference Result 17488 states and 54534 transitions. [2021-03-10 21:21:38,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-10 21:21:38,382 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:21:38,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:38,408 INFO L225 Difference]: With dead ends: 17488 [2021-03-10 21:21:38,408 INFO L226 Difference]: Without dead ends: 17478 [2021-03-10 21:21:38,409 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1140 ImplicationChecksByTransitivity, 1227.1ms TimeCoverageRelationStatistics Valid=1312, Invalid=2978, Unknown=0, NotChecked=0, Total=4290 [2021-03-10 21:21:38,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17478 states. [2021-03-10 21:21:38,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17478 to 15724. [2021-03-10 21:21:38,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15724 states, 15723 states have (on average 3.179800292565032) internal successors, (49996), 15723 states have internal predecessors, (49996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:38,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15724 states to 15724 states and 49996 transitions. [2021-03-10 21:21:38,697 INFO L78 Accepts]: Start accepts. Automaton has 15724 states and 49996 transitions. Word has length 24 [2021-03-10 21:21:38,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:38,697 INFO L480 AbstractCegarLoop]: Abstraction has 15724 states and 49996 transitions. [2021-03-10 21:21:38,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:38,697 INFO L276 IsEmpty]: Start isEmpty. Operand 15724 states and 49996 transitions. [2021-03-10 21:21:38,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:21:38,717 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:38,717 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:38,917 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable693,404 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:38,917 INFO L428 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:38,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:38,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1777304147, now seen corresponding path program 401 times [2021-03-10 21:21:38,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:38,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298744296] [2021-03-10 21:21:38,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:38,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:39,016 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:39,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298744296] [2021-03-10 21:21:39,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742516765] [2021-03-10 21:21:39,017 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:39,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:21:39,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:39,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:21:39,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:39,340 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:39,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:39,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 22 [2021-03-10 21:21:39,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698576123] [2021-03-10 21:21:39,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:21:39,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:39,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:21:39,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:21:39,341 INFO L87 Difference]: Start difference. First operand 15724 states and 49996 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:40,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:40,809 INFO L93 Difference]: Finished difference Result 19027 states and 59058 transitions. [2021-03-10 21:21:40,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-03-10 21:21:40,811 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:21:40,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:40,841 INFO L225 Difference]: With dead ends: 19027 [2021-03-10 21:21:40,841 INFO L226 Difference]: Without dead ends: 19021 [2021-03-10 21:21:40,842 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 1245.7ms TimeCoverageRelationStatistics Valid=1353, Invalid=2807, Unknown=0, NotChecked=0, Total=4160 [2021-03-10 21:21:40,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19021 states. [2021-03-10 21:21:41,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19021 to 16139. [2021-03-10 21:21:41,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16139 states, 16138 states have (on average 3.178584706902962) internal successors, (51296), 16138 states have internal predecessors, (51296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:41,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16139 states to 16139 states and 51296 transitions. [2021-03-10 21:21:41,087 INFO L78 Accepts]: Start accepts. Automaton has 16139 states and 51296 transitions. Word has length 24 [2021-03-10 21:21:41,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:41,087 INFO L480 AbstractCegarLoop]: Abstraction has 16139 states and 51296 transitions. [2021-03-10 21:21:41,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:41,087 INFO L276 IsEmpty]: Start isEmpty. Operand 16139 states and 51296 transitions. [2021-03-10 21:21:41,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:21:41,108 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:41,108 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:41,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable694 [2021-03-10 21:21:41,308 INFO L428 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:41,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:41,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1281482669, now seen corresponding path program 402 times [2021-03-10 21:21:41,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:41,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511979939] [2021-03-10 21:21:41,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:41,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:41,410 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:41,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511979939] [2021-03-10 21:21:41,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29350791] [2021-03-10 21:21:41,411 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:41,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:21:41,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:41,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:21:41,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:41,738 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:41,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:41,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 22 [2021-03-10 21:21:41,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47501565] [2021-03-10 21:21:41,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:21:41,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:41,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:21:41,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:21:41,739 INFO L87 Difference]: Start difference. First operand 16139 states and 51296 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:43,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:43,410 INFO L93 Difference]: Finished difference Result 18678 states and 58104 transitions. [2021-03-10 21:21:43,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-03-10 21:21:43,412 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:21:43,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:43,441 INFO L225 Difference]: With dead ends: 18678 [2021-03-10 21:21:43,441 INFO L226 Difference]: Without dead ends: 18674 [2021-03-10 21:21:43,441 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1415.5ms TimeCoverageRelationStatistics Valid=1546, Invalid=3010, Unknown=0, NotChecked=0, Total=4556 [2021-03-10 21:21:43,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18674 states. [2021-03-10 21:21:43,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18674 to 16227. [2021-03-10 21:21:43,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16227 states, 16226 states have (on average 3.1787255022802907) internal successors, (51578), 16226 states have internal predecessors, (51578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:43,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16227 states to 16227 states and 51578 transitions. [2021-03-10 21:21:43,703 INFO L78 Accepts]: Start accepts. Automaton has 16227 states and 51578 transitions. Word has length 24 [2021-03-10 21:21:43,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:43,703 INFO L480 AbstractCegarLoop]: Abstraction has 16227 states and 51578 transitions. [2021-03-10 21:21:43,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:43,703 INFO L276 IsEmpty]: Start isEmpty. Operand 16227 states and 51578 transitions. [2021-03-10 21:21:43,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:21:43,723 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:43,723 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:43,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable695 [2021-03-10 21:21:43,923 INFO L428 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:43,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:43,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1252246099, now seen corresponding path program 403 times [2021-03-10 21:21:43,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:43,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938372311] [2021-03-10 21:21:43,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:43,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:44,023 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:44,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938372311] [2021-03-10 21:21:44,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000000763] [2021-03-10 21:21:44,023 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:44,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:44,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:21:44,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:44,315 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:44,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:44,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 22 [2021-03-10 21:21:44,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001004012] [2021-03-10 21:21:44,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:21:44,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:44,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:21:44,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:21:44,315 INFO L87 Difference]: Start difference. First operand 16227 states and 51578 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:46,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:46,093 INFO L93 Difference]: Finished difference Result 19416 states and 60144 transitions. [2021-03-10 21:21:46,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-03-10 21:21:46,096 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:21:46,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:46,127 INFO L225 Difference]: With dead ends: 19416 [2021-03-10 21:21:46,127 INFO L226 Difference]: Without dead ends: 19416 [2021-03-10 21:21:46,128 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1258 ImplicationChecksByTransitivity, 1415.9ms TimeCoverageRelationStatistics Valid=1821, Invalid=3291, Unknown=0, NotChecked=0, Total=5112 [2021-03-10 21:21:46,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19416 states. [2021-03-10 21:21:46,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19416 to 16138. [2021-03-10 21:21:46,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16138 states, 16137 states have (on average 3.1851645287228108) internal successors, (51399), 16137 states have internal predecessors, (51399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:46,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16138 states to 16138 states and 51399 transitions. [2021-03-10 21:21:46,403 INFO L78 Accepts]: Start accepts. Automaton has 16138 states and 51399 transitions. Word has length 24 [2021-03-10 21:21:46,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:46,403 INFO L480 AbstractCegarLoop]: Abstraction has 16138 states and 51399 transitions. [2021-03-10 21:21:46,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:46,403 INFO L276 IsEmpty]: Start isEmpty. Operand 16138 states and 51399 transitions. [2021-03-10 21:21:46,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:21:46,423 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:46,423 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:46,623 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable696 [2021-03-10 21:21:46,623 INFO L428 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:46,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:46,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1823700905, now seen corresponding path program 404 times [2021-03-10 21:21:46,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:46,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608751779] [2021-03-10 21:21:46,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:46,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:46,713 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:21:46,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608751779] [2021-03-10 21:21:46,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935931988] [2021-03-10 21:21:46,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:46,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:21:46,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:46,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:21:46,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:47,102 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:47,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:47,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 22 [2021-03-10 21:21:47,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893706521] [2021-03-10 21:21:47,102 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:21:47,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:47,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:21:47,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:21:47,102 INFO L87 Difference]: Start difference. First operand 16138 states and 51399 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:49,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:49,368 INFO L93 Difference]: Finished difference Result 18584 states and 57665 transitions. [2021-03-10 21:21:49,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-03-10 21:21:49,370 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:21:49,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:49,399 INFO L225 Difference]: With dead ends: 18584 [2021-03-10 21:21:49,400 INFO L226 Difference]: Without dead ends: 18575 [2021-03-10 21:21:49,401 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2672 ImplicationChecksByTransitivity, 1990.8ms TimeCoverageRelationStatistics Valid=2787, Invalid=6333, Unknown=0, NotChecked=0, Total=9120 [2021-03-10 21:21:49,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18575 states. [2021-03-10 21:21:49,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18575 to 16009. [2021-03-10 21:21:49,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16009 states, 16008 states have (on average 3.182408795602199) internal successors, (50944), 16008 states have internal predecessors, (50944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:49,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16009 states to 16009 states and 50944 transitions. [2021-03-10 21:21:49,670 INFO L78 Accepts]: Start accepts. Automaton has 16009 states and 50944 transitions. Word has length 24 [2021-03-10 21:21:49,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:49,670 INFO L480 AbstractCegarLoop]: Abstraction has 16009 states and 50944 transitions. [2021-03-10 21:21:49,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:49,670 INFO L276 IsEmpty]: Start isEmpty. Operand 16009 states and 50944 transitions. [2021-03-10 21:21:49,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:21:49,690 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:49,690 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:49,890 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 408 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable697 [2021-03-10 21:21:49,890 INFO L428 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:49,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:49,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1936036589, now seen corresponding path program 405 times [2021-03-10 21:21:49,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:49,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955159355] [2021-03-10 21:21:49,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:49,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:50,009 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:21:50,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955159355] [2021-03-10 21:21:50,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973703711] [2021-03-10 21:21:50,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:50,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:21:50,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:50,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:21:50,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:50,336 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:50,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:50,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 23 [2021-03-10 21:21:50,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846569914] [2021-03-10 21:21:50,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:21:50,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:50,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:21:50,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:21:50,337 INFO L87 Difference]: Start difference. First operand 16009 states and 50944 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:52,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:52,648 INFO L93 Difference]: Finished difference Result 18529 states and 57461 transitions. [2021-03-10 21:21:52,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-03-10 21:21:52,650 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:21:52,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:52,676 INFO L225 Difference]: With dead ends: 18529 [2021-03-10 21:21:52,676 INFO L226 Difference]: Without dead ends: 18514 [2021-03-10 21:21:52,676 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2513 ImplicationChecksByTransitivity, 1948.3ms TimeCoverageRelationStatistics Valid=2529, Invalid=6027, Unknown=0, NotChecked=0, Total=8556 [2021-03-10 21:21:52,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18514 states. [2021-03-10 21:21:52,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18514 to 15897. [2021-03-10 21:21:52,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15897 states, 15896 states have (on average 3.1817438349270257) internal successors, (50577), 15896 states have internal predecessors, (50577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:52,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15897 states to 15897 states and 50577 transitions. [2021-03-10 21:21:52,924 INFO L78 Accepts]: Start accepts. Automaton has 15897 states and 50577 transitions. Word has length 24 [2021-03-10 21:21:52,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:52,924 INFO L480 AbstractCegarLoop]: Abstraction has 15897 states and 50577 transitions. [2021-03-10 21:21:52,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:52,924 INFO L276 IsEmpty]: Start isEmpty. Operand 15897 states and 50577 transitions. [2021-03-10 21:21:52,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:21:52,943 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:52,943 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:53,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable698 [2021-03-10 21:21:53,144 INFO L428 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:53,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:53,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1771185385, now seen corresponding path program 406 times [2021-03-10 21:21:53,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:53,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254613976] [2021-03-10 21:21:53,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:53,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:53,269 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:21:53,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254613976] [2021-03-10 21:21:53,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635774825] [2021-03-10 21:21:53,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:53,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:21:53,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:53,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:21:53,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:53,616 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:53,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:53,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2021-03-10 21:21:53,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594419685] [2021-03-10 21:21:53,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:21:53,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:53,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:21:53,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:21:53,617 INFO L87 Difference]: Start difference. First operand 15897 states and 50577 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:55,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:55,670 INFO L93 Difference]: Finished difference Result 18517 states and 57409 transitions. [2021-03-10 21:21:55,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-03-10 21:21:55,672 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:21:55,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:55,697 INFO L225 Difference]: With dead ends: 18517 [2021-03-10 21:21:55,698 INFO L226 Difference]: Without dead ends: 18490 [2021-03-10 21:21:55,698 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2460 ImplicationChecksByTransitivity, 1827.8ms TimeCoverageRelationStatistics Valid=2373, Invalid=5817, Unknown=0, NotChecked=0, Total=8190 [2021-03-10 21:21:55,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18490 states. [2021-03-10 21:21:55,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18490 to 15779. [2021-03-10 21:21:55,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15779 states, 15778 states have (on average 3.1827227785524146) internal successors, (50217), 15778 states have internal predecessors, (50217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:55,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15779 states to 15779 states and 50217 transitions. [2021-03-10 21:21:55,944 INFO L78 Accepts]: Start accepts. Automaton has 15779 states and 50217 transitions. Word has length 24 [2021-03-10 21:21:55,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:55,944 INFO L480 AbstractCegarLoop]: Abstraction has 15779 states and 50217 transitions. [2021-03-10 21:21:55,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:55,944 INFO L276 IsEmpty]: Start isEmpty. Operand 15779 states and 50217 transitions. [2021-03-10 21:21:55,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:21:55,963 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:55,963 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:56,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable699 [2021-03-10 21:21:56,164 INFO L428 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:56,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:56,164 INFO L82 PathProgramCache]: Analyzing trace with hash 730949587, now seen corresponding path program 407 times [2021-03-10 21:21:56,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:56,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843256018] [2021-03-10 21:21:56,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:56,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:56,305 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:56,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843256018] [2021-03-10 21:21:56,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860926347] [2021-03-10 21:21:56,305 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:56,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:21:56,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:56,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:21:56,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:56,736 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:56,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:56,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-03-10 21:21:56,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775889798] [2021-03-10 21:21:56,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:21:56,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:56,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:21:56,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:21:56,737 INFO L87 Difference]: Start difference. First operand 15779 states and 50217 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:58,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:58,544 INFO L93 Difference]: Finished difference Result 18160 states and 56473 transitions. [2021-03-10 21:21:58,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-03-10 21:21:58,546 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:21:58,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:58,572 INFO L225 Difference]: With dead ends: 18160 [2021-03-10 21:21:58,572 INFO L226 Difference]: Without dead ends: 18136 [2021-03-10 21:21:58,573 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2410 ImplicationChecksByTransitivity, 1704.8ms TimeCoverageRelationStatistics Valid=2313, Invalid=5697, Unknown=0, NotChecked=0, Total=8010 [2021-03-10 21:21:58,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18136 states. [2021-03-10 21:21:58,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18136 to 15810. [2021-03-10 21:21:58,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15810 states, 15809 states have (on average 3.183123537225631) internal successors, (50322), 15809 states have internal predecessors, (50322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:58,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15810 states to 15810 states and 50322 transitions. [2021-03-10 21:21:58,820 INFO L78 Accepts]: Start accepts. Automaton has 15810 states and 50322 transitions. Word has length 24 [2021-03-10 21:21:58,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:58,820 INFO L480 AbstractCegarLoop]: Abstraction has 15810 states and 50322 transitions. [2021-03-10 21:21:58,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:58,820 INFO L276 IsEmpty]: Start isEmpty. Operand 15810 states and 50322 transitions. [2021-03-10 21:21:58,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:21:58,839 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:58,839 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:59,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable700,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:59,040 INFO L428 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:59,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:59,040 INFO L82 PathProgramCache]: Analyzing trace with hash 928227975, now seen corresponding path program 408 times [2021-03-10 21:21:59,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:59,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016362528] [2021-03-10 21:21:59,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:59,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:59,183 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:59,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016362528] [2021-03-10 21:21:59,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830624660] [2021-03-10 21:21:59,183 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 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 [2021-03-10 21:21:59,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:21:59,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:59,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:21:59,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:59,582 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:59,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:59,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2021-03-10 21:21:59,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429871814] [2021-03-10 21:21:59,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 21:21:59,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:59,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 21:21:59,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:21:59,583 INFO L87 Difference]: Start difference. First operand 15810 states and 50322 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:01,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:01,459 INFO L93 Difference]: Finished difference Result 16413 states and 51718 transitions. [2021-03-10 21:22:01,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-03-10 21:22:01,461 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:22:01,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:01,486 INFO L225 Difference]: With dead ends: 16413 [2021-03-10 21:22:01,486 INFO L226 Difference]: Without dead ends: 16413 [2021-03-10 21:22:01,486 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1834 ImplicationChecksByTransitivity, 1659.6ms TimeCoverageRelationStatistics Valid=1699, Invalid=4153, Unknown=0, NotChecked=0, Total=5852 [2021-03-10 21:22:01,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16413 states. [2021-03-10 21:22:01,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16413 to 15703. [2021-03-10 21:22:01,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15703 states, 15702 states have (on average 3.1823971468602728) internal successors, (49970), 15702 states have internal predecessors, (49970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:01,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15703 states to 15703 states and 49970 transitions. [2021-03-10 21:22:01,745 INFO L78 Accepts]: Start accepts. Automaton has 15703 states and 49970 transitions. Word has length 24 [2021-03-10 21:22:01,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:01,745 INFO L480 AbstractCegarLoop]: Abstraction has 15703 states and 49970 transitions. [2021-03-10 21:22:01,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:01,745 INFO L276 IsEmpty]: Start isEmpty. Operand 15703 states and 49970 transitions. [2021-03-10 21:22:01,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:22:01,763 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:01,763 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:01,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable701 [2021-03-10 21:22:01,963 INFO L428 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:01,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:01,964 INFO L82 PathProgramCache]: Analyzing trace with hash -552061937, now seen corresponding path program 409 times [2021-03-10 21:22:01,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:01,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517735074] [2021-03-10 21:22:01,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:01,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:02,086 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:02,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517735074] [2021-03-10 21:22:02,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441382331] [2021-03-10 21:22:02,087 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:22:02,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:02,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:22:02,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:22:02,475 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:02,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:22:02,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 25 [2021-03-10 21:22:02,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821090366] [2021-03-10 21:22:02,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:22:02,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:02,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:22:02,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:22:02,476 INFO L87 Difference]: Start difference. First operand 15703 states and 49970 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) [2021-03-10 21:22:04,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:04,236 INFO L93 Difference]: Finished difference Result 16653 states and 52172 transitions. [2021-03-10 21:22:04,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-10 21:22:04,238 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 24 [2021-03-10 21:22:04,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:04,261 INFO L225 Difference]: With dead ends: 16653 [2021-03-10 21:22:04,261 INFO L226 Difference]: Without dead ends: 16639 [2021-03-10 21:22:04,262 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1337 ImplicationChecksByTransitivity, 1460.6ms TimeCoverageRelationStatistics Valid=1371, Invalid=3459, Unknown=0, NotChecked=0, Total=4830 [2021-03-10 21:22:04,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16639 states. [2021-03-10 21:22:04,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16639 to 15440. [2021-03-10 21:22:04,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15440 states, 15439 states have (on average 3.1834315694021633) internal successors, (49149), 15439 states have internal predecessors, (49149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:04,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15440 states to 15440 states and 49149 transitions. [2021-03-10 21:22:04,480 INFO L78 Accepts]: Start accepts. Automaton has 15440 states and 49149 transitions. Word has length 24 [2021-03-10 21:22:04,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:04,480 INFO L480 AbstractCegarLoop]: Abstraction has 15440 states and 49149 transitions. [2021-03-10 21:22:04,480 INFO L481 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) [2021-03-10 21:22:04,480 INFO L276 IsEmpty]: Start isEmpty. Operand 15440 states and 49149 transitions. [2021-03-10 21:22:04,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:22:04,498 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:04,498 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:04,698 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable702,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:22:04,699 INFO L428 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:04,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:04,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1154002553, now seen corresponding path program 410 times [2021-03-10 21:22:04,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:04,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967452871] [2021-03-10 21:22:04,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:04,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:04,807 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:04,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967452871] [2021-03-10 21:22:04,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078880036] [2021-03-10 21:22:04,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:22:04,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:22:04,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:22:04,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:22:04,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:22:05,178 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:05,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:22:05,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 24 [2021-03-10 21:22:05,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352592585] [2021-03-10 21:22:05,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:22:05,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:05,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:22:05,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:22:05,179 INFO L87 Difference]: Start difference. First operand 15440 states and 49149 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:06,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:06,886 INFO L93 Difference]: Finished difference Result 17145 states and 53340 transitions. [2021-03-10 21:22:06,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-03-10 21:22:06,888 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:22:06,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:06,911 INFO L225 Difference]: With dead ends: 17145 [2021-03-10 21:22:06,911 INFO L226 Difference]: Without dead ends: 17135 [2021-03-10 21:22:06,911 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1254 ImplicationChecksByTransitivity, 1398.3ms TimeCoverageRelationStatistics Valid=1349, Invalid=3207, Unknown=0, NotChecked=0, Total=4556 [2021-03-10 21:22:06,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17135 states. [2021-03-10 21:22:07,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17135 to 15065. [2021-03-10 21:22:07,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15065 states, 15064 states have (on average 3.1838157195963888) internal successors, (47961), 15064 states have internal predecessors, (47961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:07,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15065 states to 15065 states and 47961 transitions. [2021-03-10 21:22:07,139 INFO L78 Accepts]: Start accepts. Automaton has 15065 states and 47961 transitions. Word has length 24 [2021-03-10 21:22:07,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:07,139 INFO L480 AbstractCegarLoop]: Abstraction has 15065 states and 47961 transitions. [2021-03-10 21:22:07,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:07,139 INFO L276 IsEmpty]: Start isEmpty. Operand 15065 states and 47961 transitions. [2021-03-10 21:22:07,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:22:07,157 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:07,158 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:07,358 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable703 [2021-03-10 21:22:07,358 INFO L428 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:07,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:07,358 INFO L82 PathProgramCache]: Analyzing trace with hash -2004703985, now seen corresponding path program 411 times [2021-03-10 21:22:07,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:07,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282162596] [2021-03-10 21:22:07,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:07,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:07,457 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:07,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282162596] [2021-03-10 21:22:07,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575398340] [2021-03-10 21:22:07,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:22:07,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:22:07,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:22:07,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:22:07,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:22:07,821 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:07,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:22:07,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 23 [2021-03-10 21:22:07,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421388660] [2021-03-10 21:22:07,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:22:07,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:07,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:22:07,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:22:07,822 INFO L87 Difference]: Start difference. First operand 15065 states and 47961 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:09,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:09,441 INFO L93 Difference]: Finished difference Result 18361 states and 56965 transitions. [2021-03-10 21:22:09,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-03-10 21:22:09,443 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:22:09,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:09,468 INFO L225 Difference]: With dead ends: 18361 [2021-03-10 21:22:09,468 INFO L226 Difference]: Without dead ends: 18355 [2021-03-10 21:22:09,469 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1140 ImplicationChecksByTransitivity, 1339.7ms TimeCoverageRelationStatistics Valid=1388, Invalid=3034, Unknown=0, NotChecked=0, Total=4422 [2021-03-10 21:22:09,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18355 states. [2021-03-10 21:22:09,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18355 to 15150. [2021-03-10 21:22:09,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15150 states, 15149 states have (on average 3.1832464189055383) internal successors, (48223), 15149 states have internal predecessors, (48223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:09,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15150 states to 15150 states and 48223 transitions. [2021-03-10 21:22:09,705 INFO L78 Accepts]: Start accepts. Automaton has 15150 states and 48223 transitions. Word has length 24 [2021-03-10 21:22:09,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:09,705 INFO L480 AbstractCegarLoop]: Abstraction has 15150 states and 48223 transitions. [2021-03-10 21:22:09,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:09,705 INFO L276 IsEmpty]: Start isEmpty. Operand 15150 states and 48223 transitions. [2021-03-10 21:22:09,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:22:09,724 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:09,724 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:09,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable704 [2021-03-10 21:22:09,924 INFO L428 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:09,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:09,924 INFO L82 PathProgramCache]: Analyzing trace with hash -231030649, now seen corresponding path program 412 times [2021-03-10 21:22:09,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:09,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335807262] [2021-03-10 21:22:09,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:09,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:10,017 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:10,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335807262] [2021-03-10 21:22:10,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753123930] [2021-03-10 21:22:10,017 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 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 [2021-03-10 21:22:10,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:22:10,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:22:10,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:22:10,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:22:10,368 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:10,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:22:10,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 22 [2021-03-10 21:22:10,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184692648] [2021-03-10 21:22:10,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:22:10,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:10,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:22:10,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:22:10,369 INFO L87 Difference]: Start difference. First operand 15150 states and 48223 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:12,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:12,271 INFO L93 Difference]: Finished difference Result 20262 states and 62769 transitions. [2021-03-10 21:22:12,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-03-10 21:22:12,273 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:22:12,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:12,300 INFO L225 Difference]: With dead ends: 20262 [2021-03-10 21:22:12,300 INFO L226 Difference]: Without dead ends: 20260 [2021-03-10 21:22:12,301 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1169 ImplicationChecksByTransitivity, 1514.4ms TimeCoverageRelationStatistics Valid=1573, Invalid=3119, Unknown=0, NotChecked=0, Total=4692 [2021-03-10 21:22:12,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20260 states. [2021-03-10 21:22:12,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20260 to 16488. [2021-03-10 21:22:12,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16488 states, 16487 states have (on average 3.178746891490265) internal successors, (52408), 16487 states have internal predecessors, (52408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:12,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16488 states to 16488 states and 52408 transitions. [2021-03-10 21:22:12,555 INFO L78 Accepts]: Start accepts. Automaton has 16488 states and 52408 transitions. Word has length 24 [2021-03-10 21:22:12,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:12,555 INFO L480 AbstractCegarLoop]: Abstraction has 16488 states and 52408 transitions. [2021-03-10 21:22:12,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:12,555 INFO L276 IsEmpty]: Start isEmpty. Operand 16488 states and 52408 transitions. [2021-03-10 21:22:12,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:22:12,573 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:12,573 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:12,774 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable705,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:22:12,774 INFO L428 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:12,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:12,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1143646705, now seen corresponding path program 413 times [2021-03-10 21:22:12,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:12,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240940186] [2021-03-10 21:22:12,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:12,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:12,861 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:12,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240940186] [2021-03-10 21:22:12,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814782376] [2021-03-10 21:22:12,862 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:22:12,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:22:12,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:22:12,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:22:12,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:22:13,199 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:13,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:22:13,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 22 [2021-03-10 21:22:13,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275872712] [2021-03-10 21:22:13,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:22:13,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:13,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:22:13,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:22:13,200 INFO L87 Difference]: Start difference. First operand 16488 states and 52408 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:14,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:14,962 INFO L93 Difference]: Finished difference Result 19932 states and 61591 transitions. [2021-03-10 21:22:14,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-03-10 21:22:14,964 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:22:14,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:14,991 INFO L225 Difference]: With dead ends: 19932 [2021-03-10 21:22:14,992 INFO L226 Difference]: Without dead ends: 19932 [2021-03-10 21:22:14,992 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1227 ImplicationChecksByTransitivity, 1494.5ms TimeCoverageRelationStatistics Valid=1717, Invalid=3113, Unknown=0, NotChecked=0, Total=4830 [2021-03-10 21:22:15,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19932 states. [2021-03-10 21:22:15,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19932 to 16990. [2021-03-10 21:22:15,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16990 states, 16989 states have (on average 3.183648242980752) internal successors, (54087), 16989 states have internal predecessors, (54087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:15,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16990 states to 16990 states and 54087 transitions. [2021-03-10 21:22:15,329 INFO L78 Accepts]: Start accepts. Automaton has 16990 states and 54087 transitions. Word has length 24 [2021-03-10 21:22:15,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:15,329 INFO L480 AbstractCegarLoop]: Abstraction has 16990 states and 54087 transitions. [2021-03-10 21:22:15,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:15,329 INFO L276 IsEmpty]: Start isEmpty. Operand 16990 states and 54087 transitions. [2021-03-10 21:22:15,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:22:15,348 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:15,348 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:15,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable706,417 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:22:15,548 INFO L428 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:15,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:15,548 INFO L82 PathProgramCache]: Analyzing trace with hash -572191899, now seen corresponding path program 414 times [2021-03-10 21:22:15,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:15,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822733906] [2021-03-10 21:22:15,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:15,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:15,634 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:22:15,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822733906] [2021-03-10 21:22:15,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717412252] [2021-03-10 21:22:15,635 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:22:15,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:22:15,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:22:15,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:22:15,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:22:15,961 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:15,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:22:15,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 22 [2021-03-10 21:22:15,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095907760] [2021-03-10 21:22:15,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:22:15,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:15,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:22:15,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:22:15,961 INFO L87 Difference]: Start difference. First operand 16990 states and 54087 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:18,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:18,698 INFO L93 Difference]: Finished difference Result 19753 states and 61171 transitions. [2021-03-10 21:22:18,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-03-10 21:22:18,700 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:22:18,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:18,727 INFO L225 Difference]: With dead ends: 19753 [2021-03-10 21:22:18,727 INFO L226 Difference]: Without dead ends: 19744 [2021-03-10 21:22:18,728 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3393 ImplicationChecksByTransitivity, 2367.3ms TimeCoverageRelationStatistics Valid=3090, Invalid=7416, Unknown=0, NotChecked=0, Total=10506 [2021-03-10 21:22:18,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19744 states. [2021-03-10 21:22:18,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19744 to 16867. [2021-03-10 21:22:18,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16867 states, 16866 states have (on average 3.1820230048618523) internal successors, (53668), 16866 states have internal predecessors, (53668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:18,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16867 states to 16867 states and 53668 transitions. [2021-03-10 21:22:18,979 INFO L78 Accepts]: Start accepts. Automaton has 16867 states and 53668 transitions. Word has length 24 [2021-03-10 21:22:18,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:18,979 INFO L480 AbstractCegarLoop]: Abstraction has 16867 states and 53668 transitions. [2021-03-10 21:22:18,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:18,979 INFO L276 IsEmpty]: Start isEmpty. Operand 16867 states and 53668 transitions. [2021-03-10 21:22:18,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:22:18,998 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:18,998 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:19,199 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable707,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:22:19,199 INFO L428 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:19,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:19,199 INFO L82 PathProgramCache]: Analyzing trace with hash -36962097, now seen corresponding path program 415 times [2021-03-10 21:22:19,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:19,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328949531] [2021-03-10 21:22:19,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:19,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:19,300 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:22:19,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328949531] [2021-03-10 21:22:19,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593167265] [2021-03-10 21:22:19,300 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:22:19,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:19,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:22:19,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:22:19,644 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:19,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:22:19,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 23 [2021-03-10 21:22:19,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842829260] [2021-03-10 21:22:19,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:22:19,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:19,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:22:19,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:22:19,645 INFO L87 Difference]: Start difference. First operand 16867 states and 53668 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:22,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:22,199 INFO L93 Difference]: Finished difference Result 19710 states and 61049 transitions. [2021-03-10 21:22:22,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-03-10 21:22:22,202 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:22:22,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:22,228 INFO L225 Difference]: With dead ends: 19710 [2021-03-10 21:22:22,229 INFO L226 Difference]: Without dead ends: 19698 [2021-03-10 21:22:22,229 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3019 ImplicationChecksByTransitivity, 2286.1ms TimeCoverageRelationStatistics Valid=2700, Invalid=6806, Unknown=0, NotChecked=0, Total=9506 [2021-03-10 21:22:22,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19698 states. [2021-03-10 21:22:22,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19698 to 16758. [2021-03-10 21:22:22,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16758 states, 16757 states have (on average 3.181476397923256) internal successors, (53312), 16757 states have internal predecessors, (53312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:22,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16758 states to 16758 states and 53312 transitions. [2021-03-10 21:22:22,485 INFO L78 Accepts]: Start accepts. Automaton has 16758 states and 53312 transitions. Word has length 24 [2021-03-10 21:22:22,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:22,485 INFO L480 AbstractCegarLoop]: Abstraction has 16758 states and 53312 transitions. [2021-03-10 21:22:22,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:22,485 INFO L276 IsEmpty]: Start isEmpty. Operand 16758 states and 53312 transitions. [2021-03-10 21:22:22,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:22:22,505 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:22,505 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:22,705 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable708 [2021-03-10 21:22:22,705 INFO L428 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:22,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:22,705 INFO L82 PathProgramCache]: Analyzing trace with hash -624707419, now seen corresponding path program 416 times [2021-03-10 21:22:22,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:22,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784169506] [2021-03-10 21:22:22,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:22,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:22,818 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:22:22,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784169506] [2021-03-10 21:22:22,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483414371] [2021-03-10 21:22:22,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:22:22,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:22:22,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:22:22,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:22:22,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:22:23,180 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:23,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:22:23,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 24 [2021-03-10 21:22:23,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859648386] [2021-03-10 21:22:23,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:22:23,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:23,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:22:23,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:22:23,181 INFO L87 Difference]: Start difference. First operand 16758 states and 53312 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:25,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:25,557 INFO L93 Difference]: Finished difference Result 19755 states and 61167 transitions. [2021-03-10 21:22:25,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-03-10 21:22:25,559 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:22:25,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:25,586 INFO L225 Difference]: With dead ends: 19755 [2021-03-10 21:22:25,586 INFO L226 Difference]: Without dead ends: 19737 [2021-03-10 21:22:25,587 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2755 ImplicationChecksByTransitivity, 2141.6ms TimeCoverageRelationStatistics Valid=2410, Invalid=6332, Unknown=0, NotChecked=0, Total=8742 [2021-03-10 21:22:25,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19737 states. [2021-03-10 21:22:25,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19737 to 16856. [2021-03-10 21:22:25,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16856 states, 16855 states have (on average 3.18119252447345) internal successors, (53619), 16855 states have internal predecessors, (53619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:25,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16856 states to 16856 states and 53619 transitions. [2021-03-10 21:22:25,881 INFO L78 Accepts]: Start accepts. Automaton has 16856 states and 53619 transitions. Word has length 24 [2021-03-10 21:22:25,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:25,881 INFO L480 AbstractCegarLoop]: Abstraction has 16856 states and 53619 transitions. [2021-03-10 21:22:25,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:25,881 INFO L276 IsEmpty]: Start isEmpty. Operand 16856 states and 53619 transitions. [2021-03-10 21:22:25,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:22:25,900 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:25,900 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:26,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable709,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:22:26,100 INFO L428 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:26,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:26,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1664943217, now seen corresponding path program 417 times [2021-03-10 21:22:26,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:26,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803709827] [2021-03-10 21:22:26,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:26,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:26,238 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:22:26,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803709827] [2021-03-10 21:22:26,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034787819] [2021-03-10 21:22:26,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:22:26,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:22:26,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:22:26,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:22:26,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:22:26,652 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:26,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:22:26,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 25 [2021-03-10 21:22:26,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941213370] [2021-03-10 21:22:26,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:22:26,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:26,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:22:26,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:22:26,653 INFO L87 Difference]: Start difference. First operand 16856 states and 53619 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) [2021-03-10 21:22:28,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:28,847 INFO L93 Difference]: Finished difference Result 20000 states and 61915 transitions. [2021-03-10 21:22:28,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-03-10 21:22:28,849 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 24 [2021-03-10 21:22:28,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:28,879 INFO L225 Difference]: With dead ends: 20000 [2021-03-10 21:22:28,879 INFO L226 Difference]: Without dead ends: 19976 [2021-03-10 21:22:28,880 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2584 ImplicationChecksByTransitivity, 2072.6ms TimeCoverageRelationStatistics Valid=2220, Invalid=5970, Unknown=0, NotChecked=0, Total=8190 [2021-03-10 21:22:28,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19976 states. [2021-03-10 21:22:29,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19976 to 17037. [2021-03-10 21:22:29,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17037 states, 17036 states have (on average 3.181908898802536) internal successors, (54207), 17036 states have internal predecessors, (54207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:29,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17037 states to 17037 states and 54207 transitions. [2021-03-10 21:22:29,158 INFO L78 Accepts]: Start accepts. Automaton has 17037 states and 54207 transitions. Word has length 24 [2021-03-10 21:22:29,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:29,158 INFO L480 AbstractCegarLoop]: Abstraction has 17037 states and 54207 transitions. [2021-03-10 21:22:29,158 INFO L481 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) [2021-03-10 21:22:29,158 INFO L276 IsEmpty]: Start isEmpty. Operand 17037 states and 54207 transitions. [2021-03-10 21:22:29,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:22:29,179 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:29,179 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:29,379 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable710 [2021-03-10 21:22:29,380 INFO L428 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:29,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:29,380 INFO L82 PathProgramCache]: Analyzing trace with hash 447485413, now seen corresponding path program 418 times [2021-03-10 21:22:29,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:29,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328933049] [2021-03-10 21:22:29,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:29,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:29,537 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:29,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328933049] [2021-03-10 21:22:29,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134501002] [2021-03-10 21:22:29,538 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:22:29,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:22:29,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:22:29,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:22:29,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:22:29,933 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:29,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:22:29,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2021-03-10 21:22:29,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847118532] [2021-03-10 21:22:29,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 21:22:29,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:29,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 21:22:29,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:22:29,933 INFO L87 Difference]: Start difference. First operand 17037 states and 54207 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:31,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:31,850 INFO L93 Difference]: Finished difference Result 19762 states and 61367 transitions. [2021-03-10 21:22:31,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-03-10 21:22:31,852 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:22:31,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:31,881 INFO L225 Difference]: With dead ends: 19762 [2021-03-10 21:22:31,881 INFO L226 Difference]: Without dead ends: 19732 [2021-03-10 21:22:31,882 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2409 ImplicationChecksByTransitivity, 1827.1ms TimeCoverageRelationStatistics Valid=2129, Invalid=5703, Unknown=0, NotChecked=0, Total=7832 [2021-03-10 21:22:31,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19732 states. [2021-03-10 21:22:32,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19732 to 17071. [2021-03-10 21:22:32,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17071 states, 17070 states have (on average 3.1825424721734037) internal successors, (54326), 17070 states have internal predecessors, (54326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:32,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17071 states to 17071 states and 54326 transitions. [2021-03-10 21:22:32,160 INFO L78 Accepts]: Start accepts. Automaton has 17071 states and 54326 transitions. Word has length 24 [2021-03-10 21:22:32,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:32,160 INFO L480 AbstractCegarLoop]: Abstraction has 17071 states and 54326 transitions. [2021-03-10 21:22:32,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:32,160 INFO L276 IsEmpty]: Start isEmpty. Operand 17071 states and 54326 transitions. [2021-03-10 21:22:32,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:22:32,180 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:32,180 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:32,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable711,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:22:32,381 INFO L428 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:32,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:32,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1685657901, now seen corresponding path program 419 times [2021-03-10 21:22:32,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:32,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766772381] [2021-03-10 21:22:32,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:32,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:32,551 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:32,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766772381] [2021-03-10 21:22:32,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864231552] [2021-03-10 21:22:32,551 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:22:32,571 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:22:32,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:22:32,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:22:32,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:22:33,041 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:33,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:22:33,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-03-10 21:22:33,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660573842] [2021-03-10 21:22:33,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 21:22:33,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:33,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 21:22:33,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:22:33,042 INFO L87 Difference]: Start difference. First operand 17071 states and 54326 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 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) [2021-03-10 21:22:35,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:35,143 INFO L93 Difference]: Finished difference Result 18326 states and 57555 transitions. [2021-03-10 21:22:35,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-03-10 21:22:35,145 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 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 24 [2021-03-10 21:22:35,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:35,171 INFO L225 Difference]: With dead ends: 18326 [2021-03-10 21:22:35,171 INFO L226 Difference]: Without dead ends: 18326 [2021-03-10 21:22:35,172 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1972 ImplicationChecksByTransitivity, 1899.0ms TimeCoverageRelationStatistics Valid=1794, Invalid=4526, Unknown=0, NotChecked=0, Total=6320 [2021-03-10 21:22:35,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18326 states. [2021-03-10 21:22:35,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18326 to 17148. [2021-03-10 21:22:35,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17148 states, 17147 states have (on average 3.1787484691199626) internal successors, (54506), 17147 states have internal predecessors, (54506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:35,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17148 states to 17148 states and 54506 transitions. [2021-03-10 21:22:35,455 INFO L78 Accepts]: Start accepts. Automaton has 17148 states and 54506 transitions. Word has length 24 [2021-03-10 21:22:35,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:35,455 INFO L480 AbstractCegarLoop]: Abstraction has 17148 states and 54506 transitions. [2021-03-10 21:22:35,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 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) [2021-03-10 21:22:35,455 INFO L276 IsEmpty]: Start isEmpty. Operand 17148 states and 54506 transitions. [2021-03-10 21:22:35,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:22:35,474 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:35,474 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:35,674 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable712 [2021-03-10 21:22:35,674 INFO L428 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:35,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:35,675 INFO L82 PathProgramCache]: Analyzing trace with hash 518617555, now seen corresponding path program 420 times [2021-03-10 21:22:35,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:35,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080044325] [2021-03-10 21:22:35,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:35,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:35,804 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:35,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080044325] [2021-03-10 21:22:35,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30141997] [2021-03-10 21:22:35,804 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 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 [2021-03-10 21:22:35,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:22:35,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:22:35,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:22:35,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:22:36,256 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:36,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:22:36,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2021-03-10 21:22:36,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479013409] [2021-03-10 21:22:36,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 21:22:36,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:36,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 21:22:36,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:22:36,257 INFO L87 Difference]: Start difference. First operand 17148 states and 54506 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) [2021-03-10 21:22:38,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:38,200 INFO L93 Difference]: Finished difference Result 19278 states and 60184 transitions. [2021-03-10 21:22:38,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-03-10 21:22:38,202 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 24 [2021-03-10 21:22:38,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:38,228 INFO L225 Difference]: With dead ends: 19278 [2021-03-10 21:22:38,228 INFO L226 Difference]: Without dead ends: 19278 [2021-03-10 21:22:38,229 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1491 ImplicationChecksByTransitivity, 1680.4ms TimeCoverageRelationStatistics Valid=1413, Invalid=3699, Unknown=0, NotChecked=0, Total=5112 [2021-03-10 21:22:38,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19278 states. [2021-03-10 21:22:38,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19278 to 17371. [2021-03-10 21:22:38,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17371 states, 17370 states have (on average 3.1773172135866434) internal successors, (55190), 17370 states have internal predecessors, (55190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:38,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17371 states to 17371 states and 55190 transitions. [2021-03-10 21:22:38,478 INFO L78 Accepts]: Start accepts. Automaton has 17371 states and 55190 transitions. Word has length 24 [2021-03-10 21:22:38,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:38,478 INFO L480 AbstractCegarLoop]: Abstraction has 17371 states and 55190 transitions. [2021-03-10 21:22:38,478 INFO L481 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) [2021-03-10 21:22:38,478 INFO L276 IsEmpty]: Start isEmpty. Operand 17371 states and 55190 transitions. [2021-03-10 21:22:38,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:22:38,498 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:38,498 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:38,698 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable713,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:22:38,699 INFO L428 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:38,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:38,699 INFO L82 PathProgramCache]: Analyzing trace with hash 728270547, now seen corresponding path program 421 times [2021-03-10 21:22:38,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:38,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990356961] [2021-03-10 21:22:38,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:38,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:38,812 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:38,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990356961] [2021-03-10 21:22:38,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449213692] [2021-03-10 21:22:38,813 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:22:38,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:38,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:22:38,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:22:39,234 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:39,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:22:39,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 25 [2021-03-10 21:22:39,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847903730] [2021-03-10 21:22:39,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:22:39,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:39,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:22:39,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:22:39,235 INFO L87 Difference]: Start difference. First operand 17371 states and 55190 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 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) [2021-03-10 21:22:41,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:41,214 INFO L93 Difference]: Finished difference Result 20178 states and 62903 transitions. [2021-03-10 21:22:41,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-03-10 21:22:41,217 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 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 24 [2021-03-10 21:22:41,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:41,246 INFO L225 Difference]: With dead ends: 20178 [2021-03-10 21:22:41,246 INFO L226 Difference]: Without dead ends: 20178 [2021-03-10 21:22:41,246 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1416 ImplicationChecksByTransitivity, 1660.4ms TimeCoverageRelationStatistics Valid=1369, Invalid=3461, Unknown=0, NotChecked=0, Total=4830 [2021-03-10 21:22:41,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20178 states. [2021-03-10 21:22:41,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20178 to 17685. [2021-03-10 21:22:41,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17685 states, 17684 states have (on average 3.17852295860665) internal successors, (56209), 17684 states have internal predecessors, (56209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:41,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17685 states to 17685 states and 56209 transitions. [2021-03-10 21:22:41,520 INFO L78 Accepts]: Start accepts. Automaton has 17685 states and 56209 transitions. Word has length 24 [2021-03-10 21:22:41,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:41,520 INFO L480 AbstractCegarLoop]: Abstraction has 17685 states and 56209 transitions. [2021-03-10 21:22:41,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 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) [2021-03-10 21:22:41,520 INFO L276 IsEmpty]: Start isEmpty. Operand 17685 states and 56209 transitions. [2021-03-10 21:22:41,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:22:41,540 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:41,540 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:41,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable714,425 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:22:41,740 INFO L428 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:41,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:41,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1012128211, now seen corresponding path program 422 times [2021-03-10 21:22:41,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:41,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028750880] [2021-03-10 21:22:41,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:41,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:41,840 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:41,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028750880] [2021-03-10 21:22:41,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319418951] [2021-03-10 21:22:41,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:22:41,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:22:41,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:22:41,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:22:41,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:22:42,227 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:42,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:22:42,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 24 [2021-03-10 21:22:42,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548998093] [2021-03-10 21:22:42,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:22:42,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:42,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:22:42,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=420, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:22:42,228 INFO L87 Difference]: Start difference. First operand 17685 states and 56209 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 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) [2021-03-10 21:22:44,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:44,208 INFO L93 Difference]: Finished difference Result 21110 states and 65699 transitions. [2021-03-10 21:22:44,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-03-10 21:22:44,211 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 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 24 [2021-03-10 21:22:44,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:44,241 INFO L225 Difference]: With dead ends: 21110 [2021-03-10 21:22:44,241 INFO L226 Difference]: Without dead ends: 21110 [2021-03-10 21:22:44,242 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1410 ImplicationChecksByTransitivity, 1562.0ms TimeCoverageRelationStatistics Valid=1403, Invalid=3289, Unknown=0, NotChecked=0, Total=4692 [2021-03-10 21:22:44,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21110 states. [2021-03-10 21:22:44,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21110 to 18003. [2021-03-10 21:22:44,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18003 states, 18002 states have (on average 3.180702144206199) internal successors, (57259), 18002 states have internal predecessors, (57259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:44,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18003 states to 18003 states and 57259 transitions. [2021-03-10 21:22:44,532 INFO L78 Accepts]: Start accepts. Automaton has 18003 states and 57259 transitions. Word has length 24 [2021-03-10 21:22:44,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:44,532 INFO L480 AbstractCegarLoop]: Abstraction has 18003 states and 57259 transitions. [2021-03-10 21:22:44,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 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) [2021-03-10 21:22:44,532 INFO L276 IsEmpty]: Start isEmpty. Operand 18003 states and 57259 transitions. [2021-03-10 21:22:44,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:22:44,630 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:44,630 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:44,830 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable715,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:22:44,831 INFO L428 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:44,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:44,831 INFO L82 PathProgramCache]: Analyzing trace with hash -2026756397, now seen corresponding path program 423 times [2021-03-10 21:22:44,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:44,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827619479] [2021-03-10 21:22:44,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:44,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:44,929 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:44,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827619479] [2021-03-10 21:22:44,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449465938] [2021-03-10 21:22:44,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:22:44,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:22:44,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:22:44,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:22:44,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:22:45,334 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:45,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:22:45,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 23 [2021-03-10 21:22:45,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898932055] [2021-03-10 21:22:45,334 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:22:45,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:45,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:22:45,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:22:45,335 INFO L87 Difference]: Start difference. First operand 18003 states and 57259 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 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) [2021-03-10 21:22:47,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:47,344 INFO L93 Difference]: Finished difference Result 22604 states and 70090 transitions. [2021-03-10 21:22:47,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-03-10 21:22:47,346 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 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 24 [2021-03-10 21:22:47,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:47,377 INFO L225 Difference]: With dead ends: 22604 [2021-03-10 21:22:47,378 INFO L226 Difference]: Without dead ends: 22604 [2021-03-10 21:22:47,378 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1593 ImplicationChecksByTransitivity, 1700.3ms TimeCoverageRelationStatistics Valid=1595, Invalid=3375, Unknown=0, NotChecked=0, Total=4970 [2021-03-10 21:22:47,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22604 states. [2021-03-10 21:22:47,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22604 to 18724. [2021-03-10 21:22:47,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18724 states, 18723 states have (on average 3.182395983549645) internal successors, (59584), 18723 states have internal predecessors, (59584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:47,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18724 states to 18724 states and 59584 transitions. [2021-03-10 21:22:47,667 INFO L78 Accepts]: Start accepts. Automaton has 18724 states and 59584 transitions. Word has length 24 [2021-03-10 21:22:47,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:47,667 INFO L480 AbstractCegarLoop]: Abstraction has 18724 states and 59584 transitions. [2021-03-10 21:22:47,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 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) [2021-03-10 21:22:47,667 INFO L276 IsEmpty]: Start isEmpty. Operand 18724 states and 59584 transitions. [2021-03-10 21:22:47,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:22:47,689 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:47,689 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:47,889 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 427 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable716 [2021-03-10 21:22:47,889 INFO L428 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:47,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:47,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1893087699, now seen corresponding path program 424 times [2021-03-10 21:22:47,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:47,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813104314] [2021-03-10 21:22:47,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:47,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:47,976 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:47,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813104314] [2021-03-10 21:22:47,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228406383] [2021-03-10 21:22:47,977 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:22:47,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:22:47,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:22:47,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:22:47,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:22:48,342 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:48,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:22:48,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 22 [2021-03-10 21:22:48,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130168598] [2021-03-10 21:22:48,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:22:48,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:48,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:22:48,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:22:48,343 INFO L87 Difference]: Start difference. First operand 18724 states and 59584 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 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) [2021-03-10 21:22:50,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:50,490 INFO L93 Difference]: Finished difference Result 26877 states and 83547 transitions. [2021-03-10 21:22:50,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-03-10 21:22:50,493 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 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 24 [2021-03-10 21:22:50,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:50,531 INFO L225 Difference]: With dead ends: 26877 [2021-03-10 21:22:50,531 INFO L226 Difference]: Without dead ends: 26877 [2021-03-10 21:22:50,532 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1645 ImplicationChecksByTransitivity, 1666.7ms TimeCoverageRelationStatistics Valid=1679, Invalid=3151, Unknown=0, NotChecked=0, Total=4830 [2021-03-10 21:22:50,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26877 states. [2021-03-10 21:22:50,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26877 to 23210. [2021-03-10 21:22:50,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23210 states, 23209 states have (on average 3.1894092808824164) internal successors, (74023), 23209 states have internal predecessors, (74023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:50,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23210 states to 23210 states and 74023 transitions. [2021-03-10 21:22:50,918 INFO L78 Accepts]: Start accepts. Automaton has 23210 states and 74023 transitions. Word has length 24 [2021-03-10 21:22:50,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:50,918 INFO L480 AbstractCegarLoop]: Abstraction has 23210 states and 74023 transitions. [2021-03-10 21:22:50,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 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) [2021-03-10 21:22:50,918 INFO L276 IsEmpty]: Start isEmpty. Operand 23210 states and 74023 transitions. [2021-03-10 21:22:50,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:22:50,943 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:50,943 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:51,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable717,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:22:51,144 INFO L428 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:51,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:51,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1830424791, now seen corresponding path program 425 times [2021-03-10 21:22:51,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:51,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959775904] [2021-03-10 21:22:51,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:51,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:51,240 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:22:51,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959775904] [2021-03-10 21:22:51,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817354839] [2021-03-10 21:22:51,240 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:22:51,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:22:51,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:22:51,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:22:51,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:22:51,600 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:51,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:22:51,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 22 [2021-03-10 21:22:51,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999534032] [2021-03-10 21:22:51,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:22:51,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:51,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:22:51,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:22:51,601 INFO L87 Difference]: Start difference. First operand 23210 states and 74023 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 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) [2021-03-10 21:22:54,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:54,903 INFO L93 Difference]: Finished difference Result 25835 states and 80460 transitions. [2021-03-10 21:22:54,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-03-10 21:22:54,905 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 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 24 [2021-03-10 21:22:54,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:54,943 INFO L225 Difference]: With dead ends: 25835 [2021-03-10 21:22:54,943 INFO L226 Difference]: Without dead ends: 25829 [2021-03-10 21:22:54,944 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4960 ImplicationChecksByTransitivity, 2903.3ms TimeCoverageRelationStatistics Valid=3452, Invalid=8980, Unknown=0, NotChecked=0, Total=12432 [2021-03-10 21:22:54,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25829 states. [2021-03-10 21:22:55,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25829 to 23125. [2021-03-10 21:22:55,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23125 states, 23124 states have (on average 3.187900017298045) internal successors, (73717), 23124 states have internal predecessors, (73717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:55,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23125 states to 23125 states and 73717 transitions. [2021-03-10 21:22:55,370 INFO L78 Accepts]: Start accepts. Automaton has 23125 states and 73717 transitions. Word has length 24 [2021-03-10 21:22:55,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:55,370 INFO L480 AbstractCegarLoop]: Abstraction has 23125 states and 73717 transitions. [2021-03-10 21:22:55,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 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) [2021-03-10 21:22:55,370 INFO L276 IsEmpty]: Start isEmpty. Operand 23125 states and 73717 transitions. [2021-03-10 21:22:55,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:22:55,395 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:55,395 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:55,595 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable718,429 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:22:55,595 INFO L428 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:55,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:55,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1295194989, now seen corresponding path program 426 times [2021-03-10 21:22:55,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:55,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678360173] [2021-03-10 21:22:55,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:55,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:55,701 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:22:55,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678360173] [2021-03-10 21:22:55,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494237496] [2021-03-10 21:22:55,701 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:22:55,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:22:55,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:22:55,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:22:55,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:22:56,089 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:56,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:22:56,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 23 [2021-03-10 21:22:56,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003802444] [2021-03-10 21:22:56,089 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:22:56,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:56,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:22:56,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:22:56,090 INFO L87 Difference]: Start difference. First operand 23125 states and 73717 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 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) [2021-03-10 21:22:59,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:59,087 INFO L93 Difference]: Finished difference Result 25817 states and 80521 transitions. [2021-03-10 21:22:59,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-03-10 21:22:59,089 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 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 24 [2021-03-10 21:22:59,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:59,127 INFO L225 Difference]: With dead ends: 25817 [2021-03-10 21:22:59,127 INFO L226 Difference]: Without dead ends: 25805 [2021-03-10 21:22:59,128 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4219 ImplicationChecksByTransitivity, 2689.2ms TimeCoverageRelationStatistics Valid=2955, Invalid=7965, Unknown=0, NotChecked=0, Total=10920 [2021-03-10 21:22:59,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25805 states. [2021-03-10 21:22:59,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25805 to 23100. [2021-03-10 21:22:59,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23100 states, 23099 states have (on average 3.188536300272739) internal successors, (73652), 23099 states have internal predecessors, (73652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:59,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23100 states to 23100 states and 73652 transitions. [2021-03-10 21:22:59,554 INFO L78 Accepts]: Start accepts. Automaton has 23100 states and 73652 transitions. Word has length 24 [2021-03-10 21:22:59,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:59,554 INFO L480 AbstractCegarLoop]: Abstraction has 23100 states and 73652 transitions. [2021-03-10 21:22:59,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 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) [2021-03-10 21:22:59,554 INFO L276 IsEmpty]: Start isEmpty. Operand 23100 states and 73652 transitions. [2021-03-10 21:22:59,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:22:59,580 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:59,580 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:59,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable719,430 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:22:59,780 INFO L428 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:59,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:59,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1882940311, now seen corresponding path program 427 times [2021-03-10 21:22:59,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:59,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631811035] [2021-03-10 21:22:59,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:59,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:59,893 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:22:59,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631811035] [2021-03-10 21:22:59,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014864012] [2021-03-10 21:22:59,893 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:22:59,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:59,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:22:59,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:00,327 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:00,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:00,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 24 [2021-03-10 21:23:00,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423675097] [2021-03-10 21:23:00,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:23:00,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:00,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:23:00,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:23:00,328 INFO L87 Difference]: Start difference. First operand 23100 states and 73652 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 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) [2021-03-10 21:23:03,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:03,244 INFO L93 Difference]: Finished difference Result 25937 states and 80963 transitions. [2021-03-10 21:23:03,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-03-10 21:23:03,246 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 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 24 [2021-03-10 21:23:03,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:03,287 INFO L225 Difference]: With dead ends: 25937 [2021-03-10 21:23:03,287 INFO L226 Difference]: Without dead ends: 25919 [2021-03-10 21:23:03,288 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3615 ImplicationChecksByTransitivity, 2544.8ms TimeCoverageRelationStatistics Valid=2546, Invalid=7156, Unknown=0, NotChecked=0, Total=9702 [2021-03-10 21:23:03,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25919 states. [2021-03-10 21:23:03,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25919 to 23155. [2021-03-10 21:23:03,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23155 states, 23154 states have (on average 3.18916817828453) internal successors, (73842), 23154 states have internal predecessors, (73842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:03,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23155 states to 23155 states and 73842 transitions. [2021-03-10 21:23:03,770 INFO L78 Accepts]: Start accepts. Automaton has 23155 states and 73842 transitions. Word has length 24 [2021-03-10 21:23:03,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:03,770 INFO L480 AbstractCegarLoop]: Abstraction has 23155 states and 73842 transitions. [2021-03-10 21:23:03,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 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) [2021-03-10 21:23:03,770 INFO L276 IsEmpty]: Start isEmpty. Operand 23155 states and 73842 transitions. [2021-03-10 21:23:03,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:23:03,797 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:03,797 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:03,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable720 [2021-03-10 21:23:03,997 INFO L428 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:03,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:03,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1371791187, now seen corresponding path program 428 times [2021-03-10 21:23:03,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:03,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673142244] [2021-03-10 21:23:03,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:04,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:04,156 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:04,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673142244] [2021-03-10 21:23:04,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804065904] [2021-03-10 21:23:04,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:04,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:23:04,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:04,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:23:04,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:04,611 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:04,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:04,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 25 [2021-03-10 21:23:04,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748235635] [2021-03-10 21:23:04,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:23:04,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:04,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:23:04,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:23:04,612 INFO L87 Difference]: Start difference. First operand 23155 states and 73842 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 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) [2021-03-10 21:23:07,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:07,363 INFO L93 Difference]: Finished difference Result 26264 states and 82006 transitions. [2021-03-10 21:23:07,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-03-10 21:23:07,366 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 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 24 [2021-03-10 21:23:07,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:07,406 INFO L225 Difference]: With dead ends: 26264 [2021-03-10 21:23:07,406 INFO L226 Difference]: Without dead ends: 26240 [2021-03-10 21:23:07,407 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3134 ImplicationChecksByTransitivity, 2417.7ms TimeCoverageRelationStatistics Valid=2232, Invalid=6510, Unknown=0, NotChecked=0, Total=8742 [2021-03-10 21:23:07,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26240 states. [2021-03-10 21:23:07,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26240 to 23691. [2021-03-10 21:23:07,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23691 states, 23690 states have (on average 3.1908400168847617) internal successors, (75591), 23690 states have internal predecessors, (75591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:07,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23691 states to 23691 states and 75591 transitions. [2021-03-10 21:23:07,806 INFO L78 Accepts]: Start accepts. Automaton has 23691 states and 75591 transitions. Word has length 24 [2021-03-10 21:23:07,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:07,806 INFO L480 AbstractCegarLoop]: Abstraction has 23691 states and 75591 transitions. [2021-03-10 21:23:07,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 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) [2021-03-10 21:23:07,806 INFO L276 IsEmpty]: Start isEmpty. Operand 23691 states and 75591 transitions. [2021-03-10 21:23:07,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:23:07,832 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:07,832 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:08,033 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 432 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable721 [2021-03-10 21:23:08,033 INFO L428 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:08,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:08,033 INFO L82 PathProgramCache]: Analyzing trace with hash -810747479, now seen corresponding path program 429 times [2021-03-10 21:23:08,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:08,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961396272] [2021-03-10 21:23:08,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:08,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:08,197 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:08,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961396272] [2021-03-10 21:23:08,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192170797] [2021-03-10 21:23:08,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:08,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:23:08,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:08,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:23:08,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:08,669 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:08,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:08,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2021-03-10 21:23:08,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168448744] [2021-03-10 21:23:08,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 21:23:08,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:08,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 21:23:08,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:23:08,670 INFO L87 Difference]: Start difference. First operand 23691 states and 75591 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) [2021-03-10 21:23:11,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:11,100 INFO L93 Difference]: Finished difference Result 26956 states and 84218 transitions. [2021-03-10 21:23:11,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-03-10 21:23:11,103 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 24 [2021-03-10 21:23:11,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:11,145 INFO L225 Difference]: With dead ends: 26956 [2021-03-10 21:23:11,145 INFO L226 Difference]: Without dead ends: 26926 [2021-03-10 21:23:11,146 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2777 ImplicationChecksByTransitivity, 2277.5ms TimeCoverageRelationStatistics Valid=2019, Invalid=5991, Unknown=0, NotChecked=0, Total=8010 [2021-03-10 21:23:11,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26926 states. [2021-03-10 21:23:11,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26926 to 24343. [2021-03-10 21:23:11,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24343 states, 24342 states have (on average 3.1921370470791226) internal successors, (77703), 24342 states have internal predecessors, (77703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:11,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24343 states to 24343 states and 77703 transitions. [2021-03-10 21:23:11,572 INFO L78 Accepts]: Start accepts. Automaton has 24343 states and 77703 transitions. Word has length 24 [2021-03-10 21:23:11,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:11,573 INFO L480 AbstractCegarLoop]: Abstraction has 24343 states and 77703 transitions. [2021-03-10 21:23:11,573 INFO L481 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) [2021-03-10 21:23:11,573 INFO L276 IsEmpty]: Start isEmpty. Operand 24343 states and 77703 transitions. [2021-03-10 21:23:11,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:23:11,601 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:11,601 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:11,801 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable722 [2021-03-10 21:23:11,802 INFO L428 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:11,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:11,802 INFO L82 PathProgramCache]: Analyzing trace with hash 250030611, now seen corresponding path program 430 times [2021-03-10 21:23:11,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:11,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418795822] [2021-03-10 21:23:11,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:11,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:11,986 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:11,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418795822] [2021-03-10 21:23:11,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456518372] [2021-03-10 21:23:11,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:12,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:23:12,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:12,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:23:12,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:12,548 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:12,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:12,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-03-10 21:23:12,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387183455] [2021-03-10 21:23:12,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 21:23:12,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:12,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 21:23:12,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:23:12,549 INFO L87 Difference]: Start difference. First operand 24343 states and 77703 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 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) [2021-03-10 21:23:14,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:14,629 INFO L93 Difference]: Finished difference Result 26813 states and 84024 transitions. [2021-03-10 21:23:14,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-03-10 21:23:14,631 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 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 24 [2021-03-10 21:23:14,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:14,673 INFO L225 Difference]: With dead ends: 26813 [2021-03-10 21:23:14,673 INFO L226 Difference]: Without dead ends: 26777 [2021-03-10 21:23:14,674 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2479 ImplicationChecksByTransitivity, 2068.5ms TimeCoverageRelationStatistics Valid=1912, Invalid=5570, Unknown=0, NotChecked=0, Total=7482 [2021-03-10 21:23:14,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26777 states. [2021-03-10 21:23:15,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26777 to 24407. [2021-03-10 21:23:15,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24407 states, 24406 states have (on average 3.1917561255428994) internal successors, (77898), 24406 states have internal predecessors, (77898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:15,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24407 states to 24407 states and 77898 transitions. [2021-03-10 21:23:15,130 INFO L78 Accepts]: Start accepts. Automaton has 24407 states and 77898 transitions. Word has length 24 [2021-03-10 21:23:15,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:15,130 INFO L480 AbstractCegarLoop]: Abstraction has 24407 states and 77898 transitions. [2021-03-10 21:23:15,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 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) [2021-03-10 21:23:15,130 INFO L276 IsEmpty]: Start isEmpty. Operand 24407 states and 77898 transitions. [2021-03-10 21:23:15,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:23:15,157 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:15,157 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:15,358 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable723,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:15,358 INFO L428 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:15,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:15,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1425864693, now seen corresponding path program 431 times [2021-03-10 21:23:15,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:15,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188421760] [2021-03-10 21:23:15,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:15,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:15,860 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:15,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188421760] [2021-03-10 21:23:15,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390015589] [2021-03-10 21:23:15,860 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:15,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:23:15,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:15,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:23:15,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:16,393 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:16,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:16,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-03-10 21:23:16,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464052038] [2021-03-10 21:23:16,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:23:16,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:16,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:23:16,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:23:16,394 INFO L87 Difference]: Start difference. First operand 24407 states and 77898 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:18,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:18,250 INFO L93 Difference]: Finished difference Result 24899 states and 78823 transitions. [2021-03-10 21:23:18,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:23:18,252 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:23:18,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:18,289 INFO L225 Difference]: With dead ends: 24899 [2021-03-10 21:23:18,289 INFO L226 Difference]: Without dead ends: 24867 [2021-03-10 21:23:18,289 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1378.6ms TimeCoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:23:18,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24867 states. [2021-03-10 21:23:18,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24867 to 24479. [2021-03-10 21:23:18,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24479 states, 24478 states have (on average 3.185145845248795) internal successors, (77966), 24478 states have internal predecessors, (77966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:18,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24479 states to 24479 states and 77966 transitions. [2021-03-10 21:23:18,655 INFO L78 Accepts]: Start accepts. Automaton has 24479 states and 77966 transitions. Word has length 25 [2021-03-10 21:23:18,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:18,655 INFO L480 AbstractCegarLoop]: Abstraction has 24479 states and 77966 transitions. [2021-03-10 21:23:18,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:18,655 INFO L276 IsEmpty]: Start isEmpty. Operand 24479 states and 77966 transitions. [2021-03-10 21:23:18,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:23:18,682 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:18,682 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:18,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable724,435 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:18,883 INFO L428 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:18,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:18,883 INFO L82 PathProgramCache]: Analyzing trace with hash 983845119, now seen corresponding path program 432 times [2021-03-10 21:23:18,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:18,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469351679] [2021-03-10 21:23:18,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:18,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:19,369 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:19,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469351679] [2021-03-10 21:23:19,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813534193] [2021-03-10 21:23:19,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:19,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:23:19,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:19,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:23:19,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:19,932 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:19,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:19,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2021-03-10 21:23:19,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248399968] [2021-03-10 21:23:19,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:23:19,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:19,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:23:19,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:23:19,933 INFO L87 Difference]: Start difference. First operand 24479 states and 77966 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 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) [2021-03-10 21:23:21,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:21,276 INFO L93 Difference]: Finished difference Result 25039 states and 79187 transitions. [2021-03-10 21:23:21,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:23:21,278 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 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 25 [2021-03-10 21:23:21,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:21,318 INFO L225 Difference]: With dead ends: 25039 [2021-03-10 21:23:21,318 INFO L226 Difference]: Without dead ends: 25032 [2021-03-10 21:23:21,319 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1056.9ms TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:23:21,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25032 states. [2021-03-10 21:23:21,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25032 to 24640. [2021-03-10 21:23:21,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24640 states, 24639 states have (on average 3.186979991071066) internal successors, (78524), 24639 states have internal predecessors, (78524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:21,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24640 states to 24640 states and 78524 transitions. [2021-03-10 21:23:21,767 INFO L78 Accepts]: Start accepts. Automaton has 24640 states and 78524 transitions. Word has length 25 [2021-03-10 21:23:21,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:21,767 INFO L480 AbstractCegarLoop]: Abstraction has 24640 states and 78524 transitions. [2021-03-10 21:23:21,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 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) [2021-03-10 21:23:21,767 INFO L276 IsEmpty]: Start isEmpty. Operand 24640 states and 78524 transitions. [2021-03-10 21:23:21,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:23:21,794 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:21,794 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:21,994 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable727,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:21,994 INFO L428 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:21,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:21,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1696419453, now seen corresponding path program 433 times [2021-03-10 21:23:21,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:21,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097447924] [2021-03-10 21:23:21,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:21,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:22,495 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:22,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097447924] [2021-03-10 21:23:22,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621969437] [2021-03-10 21:23:22,495 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 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 [2021-03-10 21:23:22,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:22,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:23:22,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:23,062 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:23,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:23,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2021-03-10 21:23:23,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929771185] [2021-03-10 21:23:23,062 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:23:23,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:23,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:23:23,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:23:23,062 INFO L87 Difference]: Start difference. First operand 24640 states and 78524 transitions. Second operand has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:24,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:24,435 INFO L93 Difference]: Finished difference Result 25025 states and 79167 transitions. [2021-03-10 21:23:24,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:23:24,437 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:23:24,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:24,473 INFO L225 Difference]: With dead ends: 25025 [2021-03-10 21:23:24,473 INFO L226 Difference]: Without dead ends: 25009 [2021-03-10 21:23:24,473 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1142.0ms TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:23:24,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25009 states. [2021-03-10 21:23:24,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25009 to 24488. [2021-03-10 21:23:24,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24488 states, 24487 states have (on average 3.1845469024380284) internal successors, (77980), 24487 states have internal predecessors, (77980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:24,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24488 states to 24488 states and 77980 transitions. [2021-03-10 21:23:24,835 INFO L78 Accepts]: Start accepts. Automaton has 24488 states and 77980 transitions. Word has length 25 [2021-03-10 21:23:24,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:24,835 INFO L480 AbstractCegarLoop]: Abstraction has 24488 states and 77980 transitions. [2021-03-10 21:23:24,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:24,835 INFO L276 IsEmpty]: Start isEmpty. Operand 24488 states and 77980 transitions. [2021-03-10 21:23:24,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:23:24,861 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:24,861 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:25,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 437 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable730 [2021-03-10 21:23:25,061 INFO L428 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:25,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:25,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1555299925, now seen corresponding path program 434 times [2021-03-10 21:23:25,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:25,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914669183] [2021-03-10 21:23:25,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:25,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:25,509 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:25,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914669183] [2021-03-10 21:23:25,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802228749] [2021-03-10 21:23:25,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:25,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:23:25,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:25,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:23:25,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:26,113 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:26,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:26,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-03-10 21:23:26,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414756887] [2021-03-10 21:23:26,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:23:26,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:26,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:23:26,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:23:26,114 INFO L87 Difference]: Start difference. First operand 24488 states and 77980 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:27,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:27,418 INFO L93 Difference]: Finished difference Result 24884 states and 78643 transitions. [2021-03-10 21:23:27,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:23:27,420 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:23:27,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:27,457 INFO L225 Difference]: With dead ends: 24884 [2021-03-10 21:23:27,457 INFO L226 Difference]: Without dead ends: 24877 [2021-03-10 21:23:27,457 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1095.2ms TimeCoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:23:27,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24877 states. [2021-03-10 21:23:27,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24877 to 24488. [2021-03-10 21:23:27,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24488 states, 24487 states have (on average 3.1845469024380284) internal successors, (77980), 24487 states have internal predecessors, (77980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:27,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24488 states to 24488 states and 77980 transitions. [2021-03-10 21:23:27,824 INFO L78 Accepts]: Start accepts. Automaton has 24488 states and 77980 transitions. Word has length 25 [2021-03-10 21:23:27,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:27,825 INFO L480 AbstractCegarLoop]: Abstraction has 24488 states and 77980 transitions. [2021-03-10 21:23:27,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:27,825 INFO L276 IsEmpty]: Start isEmpty. Operand 24488 states and 77980 transitions. [2021-03-10 21:23:27,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:23:27,851 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:27,851 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:28,051 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable733 [2021-03-10 21:23:28,052 INFO L428 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:28,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:28,052 INFO L82 PathProgramCache]: Analyzing trace with hash 2090529727, now seen corresponding path program 435 times [2021-03-10 21:23:28,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:28,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035819789] [2021-03-10 21:23:28,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:28,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:28,526 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:28,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035819789] [2021-03-10 21:23:28,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854716469] [2021-03-10 21:23:28,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:28,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:23:28,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:28,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:23:28,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:29,126 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:29,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:29,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-03-10 21:23:29,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529656051] [2021-03-10 21:23:29,127 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:23:29,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:29,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:23:29,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:23:29,127 INFO L87 Difference]: Start difference. First operand 24488 states and 77980 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:30,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:30,502 INFO L93 Difference]: Finished difference Result 24901 states and 78668 transitions. [2021-03-10 21:23:30,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:23:30,503 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:23:30,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:30,539 INFO L225 Difference]: With dead ends: 24901 [2021-03-10 21:23:30,540 INFO L226 Difference]: Without dead ends: 24894 [2021-03-10 21:23:30,540 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1138.3ms TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:23:30,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24894 states. [2021-03-10 21:23:30,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24894 to 24488. [2021-03-10 21:23:30,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24488 states, 24487 states have (on average 3.1845469024380284) internal successors, (77980), 24487 states have internal predecessors, (77980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:30,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24488 states to 24488 states and 77980 transitions. [2021-03-10 21:23:30,917 INFO L78 Accepts]: Start accepts. Automaton has 24488 states and 77980 transitions. Word has length 25 [2021-03-10 21:23:30,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:30,917 INFO L480 AbstractCegarLoop]: Abstraction has 24488 states and 77980 transitions. [2021-03-10 21:23:30,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:30,917 INFO L276 IsEmpty]: Start isEmpty. Operand 24488 states and 77980 transitions. [2021-03-10 21:23:31,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:23:31,066 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:31,066 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:31,266 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable736,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:31,266 INFO L428 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:31,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:31,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1502784405, now seen corresponding path program 436 times [2021-03-10 21:23:31,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:31,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600814979] [2021-03-10 21:23:31,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:31,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:31,825 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:31,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600814979] [2021-03-10 21:23:31,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896353706] [2021-03-10 21:23:31,825 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:31,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:23:31,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:31,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:23:31,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:32,495 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:32,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:32,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-03-10 21:23:32,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340664839] [2021-03-10 21:23:32,496 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:23:32,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:32,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:23:32,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:23:32,496 INFO L87 Difference]: Start difference. First operand 24488 states and 77980 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:34,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:34,027 INFO L93 Difference]: Finished difference Result 24921 states and 78698 transitions. [2021-03-10 21:23:34,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:23:34,029 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:23:34,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:34,066 INFO L225 Difference]: With dead ends: 24921 [2021-03-10 21:23:34,066 INFO L226 Difference]: Without dead ends: 24914 [2021-03-10 21:23:34,066 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1325.3ms TimeCoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:23:34,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24914 states. [2021-03-10 21:23:34,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24914 to 24488. [2021-03-10 21:23:34,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24488 states, 24487 states have (on average 3.1845469024380284) internal successors, (77980), 24487 states have internal predecessors, (77980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:34,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24488 states to 24488 states and 77980 transitions. [2021-03-10 21:23:34,429 INFO L78 Accepts]: Start accepts. Automaton has 24488 states and 77980 transitions. Word has length 25 [2021-03-10 21:23:34,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:34,429 INFO L480 AbstractCegarLoop]: Abstraction has 24488 states and 77980 transitions. [2021-03-10 21:23:34,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:34,429 INFO L276 IsEmpty]: Start isEmpty. Operand 24488 states and 77980 transitions. [2021-03-10 21:23:34,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:23:34,455 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:34,455 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:34,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable739,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:34,655 INFO L428 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:34,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:34,655 INFO L82 PathProgramCache]: Analyzing trace with hash 462548607, now seen corresponding path program 437 times [2021-03-10 21:23:34,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:34,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204655041] [2021-03-10 21:23:34,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:34,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:35,171 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:35,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204655041] [2021-03-10 21:23:35,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276073272] [2021-03-10 21:23:35,171 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:35,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:23:35,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:35,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:23:35,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:35,720 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:35,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:35,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-03-10 21:23:35,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370296343] [2021-03-10 21:23:35,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:23:35,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:35,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:23:35,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:23:35,721 INFO L87 Difference]: Start difference. First operand 24488 states and 77980 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:37,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:37,566 INFO L93 Difference]: Finished difference Result 24944 states and 78733 transitions. [2021-03-10 21:23:37,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:23:37,568 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:23:37,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:37,606 INFO L225 Difference]: With dead ends: 24944 [2021-03-10 21:23:37,606 INFO L226 Difference]: Without dead ends: 24937 [2021-03-10 21:23:37,606 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1286.8ms TimeCoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:23:37,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24937 states. [2021-03-10 21:23:37,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24937 to 24488. [2021-03-10 21:23:37,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24488 states, 24487 states have (on average 3.1845469024380284) internal successors, (77980), 24487 states have internal predecessors, (77980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:38,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24488 states to 24488 states and 77980 transitions. [2021-03-10 21:23:38,031 INFO L78 Accepts]: Start accepts. Automaton has 24488 states and 77980 transitions. Word has length 25 [2021-03-10 21:23:38,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:38,031 INFO L480 AbstractCegarLoop]: Abstraction has 24488 states and 77980 transitions. [2021-03-10 21:23:38,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:38,031 INFO L276 IsEmpty]: Start isEmpty. Operand 24488 states and 77980 transitions. [2021-03-10 21:23:38,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:23:38,058 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:38,058 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:38,258 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable742 [2021-03-10 21:23:38,259 INFO L428 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:38,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:38,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1719990059, now seen corresponding path program 438 times [2021-03-10 21:23:38,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:38,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488537669] [2021-03-10 21:23:38,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:38,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:38,786 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:38,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488537669] [2021-03-10 21:23:38,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648341118] [2021-03-10 21:23:38,786 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:23:38,807 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:23:38,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:38,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:23:38,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:39,396 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:39,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:39,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-03-10 21:23:39,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575826520] [2021-03-10 21:23:39,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:23:39,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:39,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:23:39,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:23:39,397 INFO L87 Difference]: Start difference. First operand 24488 states and 77980 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:41,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:41,188 INFO L93 Difference]: Finished difference Result 24802 states and 78491 transitions. [2021-03-10 21:23:41,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:23:41,190 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:23:41,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:41,231 INFO L225 Difference]: With dead ends: 24802 [2021-03-10 21:23:41,231 INFO L226 Difference]: Without dead ends: 24795 [2021-03-10 21:23:41,231 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1382.1ms TimeCoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:23:41,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24795 states. [2021-03-10 21:23:41,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24795 to 24488. [2021-03-10 21:23:41,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24488 states, 24487 states have (on average 3.1845469024380284) internal successors, (77980), 24487 states have internal predecessors, (77980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:41,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24488 states to 24488 states and 77980 transitions. [2021-03-10 21:23:41,633 INFO L78 Accepts]: Start accepts. Automaton has 24488 states and 77980 transitions. Word has length 25 [2021-03-10 21:23:41,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:41,633 INFO L480 AbstractCegarLoop]: Abstraction has 24488 states and 77980 transitions. [2021-03-10 21:23:41,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:41,634 INFO L276 IsEmpty]: Start isEmpty. Operand 24488 states and 77980 transitions. [2021-03-10 21:23:41,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:23:41,662 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:41,662 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:41,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable745,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:41,863 INFO L428 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:41,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:41,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1617763643, now seen corresponding path program 439 times [2021-03-10 21:23:41,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:41,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997014300] [2021-03-10 21:23:41,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:41,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:42,416 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:42,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997014300] [2021-03-10 21:23:42,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771954741] [2021-03-10 21:23:42,416 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:23:42,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:42,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:23:42,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:43,201 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:43,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:43,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 23 [2021-03-10 21:23:43,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471223949] [2021-03-10 21:23:43,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:23:43,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:43,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:23:43,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:23:43,202 INFO L87 Difference]: Start difference. First operand 24488 states and 77980 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:43,994 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-03-10 21:23:44,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:44,219 INFO L93 Difference]: Finished difference Result 25074 states and 79435 transitions. [2021-03-10 21:23:44,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:23:44,221 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:23:44,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:44,257 INFO L225 Difference]: With dead ends: 25074 [2021-03-10 21:23:44,257 INFO L226 Difference]: Without dead ends: 25067 [2021-03-10 21:23:44,257 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1336.2ms TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:23:44,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25067 states. [2021-03-10 21:23:44,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25067 to 24661. [2021-03-10 21:23:44,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24661 states, 24660 states have (on average 3.1872668288726684) internal successors, (78598), 24660 states have internal predecessors, (78598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:44,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24661 states to 24661 states and 78598 transitions. [2021-03-10 21:23:44,637 INFO L78 Accepts]: Start accepts. Automaton has 24661 states and 78598 transitions. Word has length 25 [2021-03-10 21:23:44,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:44,638 INFO L480 AbstractCegarLoop]: Abstraction has 24661 states and 78598 transitions. [2021-03-10 21:23:44,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:44,638 INFO L276 IsEmpty]: Start isEmpty. Operand 24661 states and 78598 transitions. [2021-03-10 21:23:44,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:23:44,664 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:44,664 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:44,864 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable748,443 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:44,864 INFO L428 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:44,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:44,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1062500929, now seen corresponding path program 440 times [2021-03-10 21:23:44,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:44,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947989227] [2021-03-10 21:23:44,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:44,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:45,389 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:45,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947989227] [2021-03-10 21:23:45,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134950501] [2021-03-10 21:23:45,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:45,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:23:45,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:45,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:23:45,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:46,232 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:46,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:46,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 23 [2021-03-10 21:23:46,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401305896] [2021-03-10 21:23:46,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:23:46,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:46,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:23:46,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:23:46,233 INFO L87 Difference]: Start difference. First operand 24661 states and 78598 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:47,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:47,314 INFO L93 Difference]: Finished difference Result 25075 states and 79432 transitions. [2021-03-10 21:23:47,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:23:47,316 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:23:47,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:47,352 INFO L225 Difference]: With dead ends: 25075 [2021-03-10 21:23:47,352 INFO L226 Difference]: Without dead ends: 25066 [2021-03-10 21:23:47,352 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1335.3ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:23:47,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25066 states. [2021-03-10 21:23:47,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25066 to 24661. [2021-03-10 21:23:47,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24661 states, 24660 states have (on average 3.1870235198702352) internal successors, (78592), 24660 states have internal predecessors, (78592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:47,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24661 states to 24661 states and 78592 transitions. [2021-03-10 21:23:47,726 INFO L78 Accepts]: Start accepts. Automaton has 24661 states and 78592 transitions. Word has length 25 [2021-03-10 21:23:47,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:47,726 INFO L480 AbstractCegarLoop]: Abstraction has 24661 states and 78592 transitions. [2021-03-10 21:23:47,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:47,726 INFO L276 IsEmpty]: Start isEmpty. Operand 24661 states and 78592 transitions. [2021-03-10 21:23:47,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:23:47,752 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:47,752 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:47,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 444 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable751 [2021-03-10 21:23:47,952 INFO L428 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:47,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:47,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1153172539, now seen corresponding path program 441 times [2021-03-10 21:23:47,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:47,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153342276] [2021-03-10 21:23:47,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:47,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:48,441 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:48,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153342276] [2021-03-10 21:23:48,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765948116] [2021-03-10 21:23:48,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:23:48,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:23:48,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:48,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:23:48,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:49,388 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:49,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:49,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2021-03-10 21:23:49,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403029674] [2021-03-10 21:23:49,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:23:49,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:49,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:23:49,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:23:49,389 INFO L87 Difference]: Start difference. First operand 24661 states and 78592 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:50,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:50,473 INFO L93 Difference]: Finished difference Result 24947 states and 79111 transitions. [2021-03-10 21:23:50,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:23:50,475 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:23:50,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:50,511 INFO L225 Difference]: With dead ends: 24947 [2021-03-10 21:23:50,511 INFO L226 Difference]: Without dead ends: 24940 [2021-03-10 21:23:50,512 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1399.1ms TimeCoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:23:50,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24940 states. [2021-03-10 21:23:50,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24940 to 24661. [2021-03-10 21:23:50,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24661 states, 24660 states have (on average 3.1870235198702352) internal successors, (78592), 24660 states have internal predecessors, (78592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:50,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24661 states to 24661 states and 78592 transitions. [2021-03-10 21:23:50,882 INFO L78 Accepts]: Start accepts. Automaton has 24661 states and 78592 transitions. Word has length 25 [2021-03-10 21:23:50,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:50,882 INFO L480 AbstractCegarLoop]: Abstraction has 24661 states and 78592 transitions. [2021-03-10 21:23:50,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:50,882 INFO L276 IsEmpty]: Start isEmpty. Operand 24661 states and 78592 transitions. [2021-03-10 21:23:50,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:23:50,909 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:50,909 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:51,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable754 [2021-03-10 21:23:51,110 INFO L428 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:51,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:51,110 INFO L82 PathProgramCache]: Analyzing trace with hash -205598593, now seen corresponding path program 442 times [2021-03-10 21:23:51,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:51,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125617408] [2021-03-10 21:23:51,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:51,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:51,666 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:51,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125617408] [2021-03-10 21:23:51,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108454560] [2021-03-10 21:23:51,667 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:23:51,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:23:51,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:51,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:23:51,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:52,371 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:52,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:52,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 23 [2021-03-10 21:23:52,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350897490] [2021-03-10 21:23:52,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:23:52,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:52,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:23:52,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:23:52,371 INFO L87 Difference]: Start difference. First operand 24661 states and 78592 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:53,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:53,537 INFO L93 Difference]: Finished difference Result 25694 states and 81409 transitions. [2021-03-10 21:23:53,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:23:53,539 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:23:53,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:53,576 INFO L225 Difference]: With dead ends: 25694 [2021-03-10 21:23:53,576 INFO L226 Difference]: Without dead ends: 25677 [2021-03-10 21:23:53,576 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1308.7ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:23:53,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25677 states. [2021-03-10 21:23:53,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25677 to 25073. [2021-03-10 21:23:53,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25073 states, 25072 states have (on average 3.1924058710912573) internal successors, (80040), 25072 states have internal predecessors, (80040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:54,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25073 states to 25073 states and 80040 transitions. [2021-03-10 21:23:54,039 INFO L78 Accepts]: Start accepts. Automaton has 25073 states and 80040 transitions. Word has length 25 [2021-03-10 21:23:54,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:54,039 INFO L480 AbstractCegarLoop]: Abstraction has 25073 states and 80040 transitions. [2021-03-10 21:23:54,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:54,039 INFO L276 IsEmpty]: Start isEmpty. Operand 25073 states and 80040 transitions. [2021-03-10 21:23:54,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:23:54,066 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:54,066 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:54,266 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable757,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:54,266 INFO L428 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:54,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:54,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1409104131, now seen corresponding path program 443 times [2021-03-10 21:23:54,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:54,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224831736] [2021-03-10 21:23:54,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:54,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:54,782 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:54,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224831736] [2021-03-10 21:23:54,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583167513] [2021-03-10 21:23:54,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:54,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:23:54,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:54,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:23:54,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:55,413 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:55,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:55,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 23 [2021-03-10 21:23:55,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821767887] [2021-03-10 21:23:55,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:23:55,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:55,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:23:55,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:23:55,414 INFO L87 Difference]: Start difference. First operand 25073 states and 80040 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:56,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:56,767 INFO L93 Difference]: Finished difference Result 25700 states and 81360 transitions. [2021-03-10 21:23:56,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:23:56,769 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:23:56,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:56,809 INFO L225 Difference]: With dead ends: 25700 [2021-03-10 21:23:56,809 INFO L226 Difference]: Without dead ends: 25682 [2021-03-10 21:23:56,809 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1221.9ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:23:56,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25682 states. [2021-03-10 21:23:57,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25682 to 24970. [2021-03-10 21:23:57,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24970 states, 24969 states have (on average 3.1887140053666547) internal successors, (79619), 24969 states have internal predecessors, (79619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:57,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24970 states to 24970 states and 79619 transitions. [2021-03-10 21:23:57,231 INFO L78 Accepts]: Start accepts. Automaton has 24970 states and 79619 transitions. Word has length 25 [2021-03-10 21:23:57,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:57,231 INFO L480 AbstractCegarLoop]: Abstraction has 24970 states and 79619 transitions. [2021-03-10 21:23:57,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:57,231 INFO L276 IsEmpty]: Start isEmpty. Operand 24970 states and 79619 transitions. [2021-03-10 21:23:57,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:23:57,258 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:57,258 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:57,458 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable760 [2021-03-10 21:23:57,458 INFO L428 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:57,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:57,458 INFO L82 PathProgramCache]: Analyzing trace with hash -670189697, now seen corresponding path program 444 times [2021-03-10 21:23:57,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:57,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343700969] [2021-03-10 21:23:57,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:57,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:57,929 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:57,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343700969] [2021-03-10 21:23:57,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569861216] [2021-03-10 21:23:57,930 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:23:57,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:23:57,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:57,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:23:57,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:58,681 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:58,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:58,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 22 [2021-03-10 21:23:58,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766269889] [2021-03-10 21:23:58,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:23:58,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:58,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:23:58,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:23:58,682 INFO L87 Difference]: Start difference. First operand 24970 states and 79619 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:00,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:00,137 INFO L93 Difference]: Finished difference Result 25480 states and 80657 transitions. [2021-03-10 21:24:00,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:24:00,139 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:24:00,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:00,178 INFO L225 Difference]: With dead ends: 25480 [2021-03-10 21:24:00,178 INFO L226 Difference]: Without dead ends: 25458 [2021-03-10 21:24:00,178 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1340.1ms TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:24:00,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25458 states. [2021-03-10 21:24:00,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25458 to 24939. [2021-03-10 21:24:00,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24939 states, 24938 states have (on average 3.1885876974897744) internal successors, (79517), 24938 states have internal predecessors, (79517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:00,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24939 states to 24939 states and 79517 transitions. [2021-03-10 21:24:00,630 INFO L78 Accepts]: Start accepts. Automaton has 24939 states and 79517 transitions. Word has length 25 [2021-03-10 21:24:00,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:00,630 INFO L480 AbstractCegarLoop]: Abstraction has 24939 states and 79517 transitions. [2021-03-10 21:24:00,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:00,630 INFO L276 IsEmpty]: Start isEmpty. Operand 24939 states and 79517 transitions. [2021-03-10 21:24:00,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:24:00,658 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:00,658 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:00,858 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 448 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable763 [2021-03-10 21:24:00,858 INFO L428 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:00,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:00,858 INFO L82 PathProgramCache]: Analyzing trace with hash -703788925, now seen corresponding path program 445 times [2021-03-10 21:24:00,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:00,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687386353] [2021-03-10 21:24:00,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:00,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:01,383 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:01,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687386353] [2021-03-10 21:24:01,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350849596] [2021-03-10 21:24:01,384 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:01,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:01,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:24:01,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:02,217 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:02,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:02,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 22 [2021-03-10 21:24:02,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562740] [2021-03-10 21:24:02,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:24:02,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:02,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:24:02,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:24:02,218 INFO L87 Difference]: Start difference. First operand 24939 states and 79517 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:03,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:03,643 INFO L93 Difference]: Finished difference Result 25309 states and 80217 transitions. [2021-03-10 21:24:03,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:24:03,645 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:24:03,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:03,683 INFO L225 Difference]: With dead ends: 25309 [2021-03-10 21:24:03,683 INFO L226 Difference]: Without dead ends: 25302 [2021-03-10 21:24:03,683 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1373.4ms TimeCoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:24:03,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25302 states. [2021-03-10 21:24:03,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25302 to 24939. [2021-03-10 21:24:04,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24939 states, 24938 states have (on average 3.1885876974897744) internal successors, (79517), 24938 states have internal predecessors, (79517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:04,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24939 states to 24939 states and 79517 transitions. [2021-03-10 21:24:04,065 INFO L78 Accepts]: Start accepts. Automaton has 24939 states and 79517 transitions. Word has length 25 [2021-03-10 21:24:04,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:04,065 INFO L480 AbstractCegarLoop]: Abstraction has 24939 states and 79517 transitions. [2021-03-10 21:24:04,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:04,066 INFO L276 IsEmpty]: Start isEmpty. Operand 24939 states and 79517 transitions. [2021-03-10 21:24:04,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:24:04,092 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:04,093 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:04,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable766,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:04,293 INFO L428 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:04,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:04,293 INFO L82 PathProgramCache]: Analyzing trace with hash 323843797, now seen corresponding path program 446 times [2021-03-10 21:24:04,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:04,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037274299] [2021-03-10 21:24:04,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:04,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:04,770 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:04,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037274299] [2021-03-10 21:24:04,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509564011] [2021-03-10 21:24:04,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:04,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:24:04,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:04,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:24:04,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:05,604 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:05,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:05,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2021-03-10 21:24:05,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691098317] [2021-03-10 21:24:05,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:24:05,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:05,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:24:05,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:24:05,605 INFO L87 Difference]: Start difference. First operand 24939 states and 79517 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:06,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:06,630 INFO L93 Difference]: Finished difference Result 25226 states and 80018 transitions. [2021-03-10 21:24:06,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:24:06,633 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:24:06,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:06,673 INFO L225 Difference]: With dead ends: 25226 [2021-03-10 21:24:06,673 INFO L226 Difference]: Without dead ends: 25213 [2021-03-10 21:24:06,673 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1189.3ms TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:24:06,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25213 states. [2021-03-10 21:24:07,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25213 to 24914. [2021-03-10 21:24:07,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24914 states, 24913 states have (on average 3.1877333119255007) internal successors, (79416), 24913 states have internal predecessors, (79416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:07,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24914 states to 24914 states and 79416 transitions. [2021-03-10 21:24:07,084 INFO L78 Accepts]: Start accepts. Automaton has 24914 states and 79416 transitions. Word has length 25 [2021-03-10 21:24:07,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:07,084 INFO L480 AbstractCegarLoop]: Abstraction has 24914 states and 79416 transitions. [2021-03-10 21:24:07,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:07,084 INFO L276 IsEmpty]: Start isEmpty. Operand 24914 states and 79416 transitions. [2021-03-10 21:24:07,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:24:07,112 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:07,112 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:07,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable769,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:07,312 INFO L428 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:07,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:07,312 INFO L82 PathProgramCache]: Analyzing trace with hash -895253061, now seen corresponding path program 447 times [2021-03-10 21:24:07,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:07,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227896780] [2021-03-10 21:24:07,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:07,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:07,871 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:07,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227896780] [2021-03-10 21:24:07,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15394010] [2021-03-10 21:24:07,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:07,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:24:07,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:07,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:24:07,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:08,523 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:08,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:08,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 23 [2021-03-10 21:24:08,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018835127] [2021-03-10 21:24:08,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:24:08,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:08,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:24:08,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:24:08,524 INFO L87 Difference]: Start difference. First operand 24914 states and 79416 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:09,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:09,861 INFO L93 Difference]: Finished difference Result 26019 states and 82469 transitions. [2021-03-10 21:24:09,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:24:09,863 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:24:09,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:09,902 INFO L225 Difference]: With dead ends: 26019 [2021-03-10 21:24:09,902 INFO L226 Difference]: Without dead ends: 26002 [2021-03-10 21:24:09,902 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1274.2ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:24:09,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26002 states. [2021-03-10 21:24:10,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26002 to 25397. [2021-03-10 21:24:10,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25397 states, 25396 states have (on average 3.193416286029296) internal successors, (81100), 25396 states have internal predecessors, (81100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:10,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25397 states to 25397 states and 81100 transitions. [2021-03-10 21:24:10,404 INFO L78 Accepts]: Start accepts. Automaton has 25397 states and 81100 transitions. Word has length 25 [2021-03-10 21:24:10,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:10,404 INFO L480 AbstractCegarLoop]: Abstraction has 25397 states and 81100 transitions. [2021-03-10 21:24:10,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:10,404 INFO L276 IsEmpty]: Start isEmpty. Operand 25397 states and 81100 transitions. [2021-03-10 21:24:10,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:24:10,431 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:10,431 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:10,631 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 451 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable772 [2021-03-10 21:24:10,631 INFO L428 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:10,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:10,631 INFO L82 PathProgramCache]: Analyzing trace with hash 719449663, now seen corresponding path program 448 times [2021-03-10 21:24:10,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:10,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25380959] [2021-03-10 21:24:10,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:10,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:11,168 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:11,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25380959] [2021-03-10 21:24:11,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115269915] [2021-03-10 21:24:11,168 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:11,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:24:11,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:11,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:24:11,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:11,897 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:11,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:11,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 23 [2021-03-10 21:24:11,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626438662] [2021-03-10 21:24:11,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:24:11,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:11,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:24:11,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:24:11,897 INFO L87 Difference]: Start difference. First operand 25397 states and 81100 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:13,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:13,551 INFO L93 Difference]: Finished difference Result 26023 states and 82394 transitions. [2021-03-10 21:24:13,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:24:13,554 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:24:13,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:13,593 INFO L225 Difference]: With dead ends: 26023 [2021-03-10 21:24:13,594 INFO L226 Difference]: Without dead ends: 26005 [2021-03-10 21:24:13,594 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1314.0ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:24:13,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26005 states. [2021-03-10 21:24:13,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26005 to 25282. [2021-03-10 21:24:13,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25282 states, 25281 states have (on average 3.189628574819034) internal successors, (80637), 25281 states have internal predecessors, (80637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:13,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25282 states to 25282 states and 80637 transitions. [2021-03-10 21:24:14,000 INFO L78 Accepts]: Start accepts. Automaton has 25282 states and 80637 transitions. Word has length 25 [2021-03-10 21:24:14,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:14,000 INFO L480 AbstractCegarLoop]: Abstraction has 25282 states and 80637 transitions. [2021-03-10 21:24:14,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:14,000 INFO L276 IsEmpty]: Start isEmpty. Operand 25282 states and 80637 transitions. [2021-03-10 21:24:14,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:24:14,026 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:14,026 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:14,226 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable775 [2021-03-10 21:24:14,226 INFO L428 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:14,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:14,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1359844165, now seen corresponding path program 449 times [2021-03-10 21:24:14,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:14,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874261130] [2021-03-10 21:24:14,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:14,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:14,707 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:14,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874261130] [2021-03-10 21:24:14,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414943679] [2021-03-10 21:24:14,707 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:14,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:24:14,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:14,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:24:14,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:15,414 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:15,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:15,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 22 [2021-03-10 21:24:15,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127314300] [2021-03-10 21:24:15,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:24:15,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:15,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:24:15,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:24:15,415 INFO L87 Difference]: Start difference. First operand 25282 states and 80637 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:16,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:16,917 INFO L93 Difference]: Finished difference Result 25873 states and 81826 transitions. [2021-03-10 21:24:16,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:24:16,919 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:24:16,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:16,960 INFO L225 Difference]: With dead ends: 25873 [2021-03-10 21:24:16,960 INFO L226 Difference]: Without dead ends: 25851 [2021-03-10 21:24:16,960 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1308.6ms TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:24:16,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25851 states. [2021-03-10 21:24:17,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25851 to 25224. [2021-03-10 21:24:17,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25224 states, 25223 states have (on average 3.1875669032232485) internal successors, (80400), 25223 states have internal predecessors, (80400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:17,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25224 states to 25224 states and 80400 transitions. [2021-03-10 21:24:17,523 INFO L78 Accepts]: Start accepts. Automaton has 25224 states and 80400 transitions. Word has length 25 [2021-03-10 21:24:17,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:17,523 INFO L480 AbstractCegarLoop]: Abstraction has 25224 states and 80400 transitions. [2021-03-10 21:24:17,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:17,524 INFO L276 IsEmpty]: Start isEmpty. Operand 25224 states and 80400 transitions. [2021-03-10 21:24:17,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:24:17,554 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:17,554 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:17,754 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 453 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable778 [2021-03-10 21:24:17,754 INFO L428 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:17,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:17,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1393443393, now seen corresponding path program 450 times [2021-03-10 21:24:17,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:17,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497749403] [2021-03-10 21:24:17,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:17,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:18,289 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:18,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497749403] [2021-03-10 21:24:18,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462913274] [2021-03-10 21:24:18,289 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:18,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:24:18,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:18,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:24:18,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:18,994 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:18,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:18,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 22 [2021-03-10 21:24:18,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816357236] [2021-03-10 21:24:18,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:24:18,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:18,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:24:18,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:24:18,995 INFO L87 Difference]: Start difference. First operand 25224 states and 80400 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:20,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:20,723 INFO L93 Difference]: Finished difference Result 25707 states and 81351 transitions. [2021-03-10 21:24:20,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:24:20,726 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:24:20,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:20,764 INFO L225 Difference]: With dead ends: 25707 [2021-03-10 21:24:20,764 INFO L226 Difference]: Without dead ends: 25681 [2021-03-10 21:24:20,765 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1401.3ms TimeCoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:24:20,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25681 states. [2021-03-10 21:24:21,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25681 to 25191. [2021-03-10 21:24:21,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25191 states, 25190 states have (on average 3.1873362445414846) internal successors, (80289), 25190 states have internal predecessors, (80289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:21,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25191 states to 25191 states and 80289 transitions. [2021-03-10 21:24:21,168 INFO L78 Accepts]: Start accepts. Automaton has 25191 states and 80289 transitions. Word has length 25 [2021-03-10 21:24:21,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:21,168 INFO L480 AbstractCegarLoop]: Abstraction has 25191 states and 80289 transitions. [2021-03-10 21:24:21,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:21,168 INFO L276 IsEmpty]: Start isEmpty. Operand 25191 states and 80289 transitions. [2021-03-10 21:24:21,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:24:21,196 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:21,196 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:21,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable781,454 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:21,397 INFO L428 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:21,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:21,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1859947835, now seen corresponding path program 451 times [2021-03-10 21:24:21,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:21,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234577306] [2021-03-10 21:24:21,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:21,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:21,967 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:21,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234577306] [2021-03-10 21:24:21,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755786103] [2021-03-10 21:24:21,967 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:21,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:21,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:24:21,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:22,630 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:22,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:22,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 22 [2021-03-10 21:24:22,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401710975] [2021-03-10 21:24:22,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:24:22,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:22,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:24:22,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:24:22,631 INFO L87 Difference]: Start difference. First operand 25191 states and 80289 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:24,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:24,326 INFO L93 Difference]: Finished difference Result 25528 states and 80917 transitions. [2021-03-10 21:24:24,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:24:24,328 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:24:24,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:24,366 INFO L225 Difference]: With dead ends: 25528 [2021-03-10 21:24:24,366 INFO L226 Difference]: Without dead ends: 25521 [2021-03-10 21:24:24,366 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1301.9ms TimeCoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:24:24,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25521 states. [2021-03-10 21:24:24,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25521 to 25191. [2021-03-10 21:24:24,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25191 states, 25190 states have (on average 3.1873362445414846) internal successors, (80289), 25190 states have internal predecessors, (80289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:24,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25191 states to 25191 states and 80289 transitions. [2021-03-10 21:24:24,804 INFO L78 Accepts]: Start accepts. Automaton has 25191 states and 80289 transitions. Word has length 25 [2021-03-10 21:24:24,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:24,804 INFO L480 AbstractCegarLoop]: Abstraction has 25191 states and 80289 transitions. [2021-03-10 21:24:24,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:24,804 INFO L276 IsEmpty]: Start isEmpty. Operand 25191 states and 80289 transitions. [2021-03-10 21:24:24,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:24:24,831 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:24,831 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:25,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable784 [2021-03-10 21:24:25,032 INFO L428 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:25,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:25,032 INFO L82 PathProgramCache]: Analyzing trace with hash 519987609, now seen corresponding path program 452 times [2021-03-10 21:24:25,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:25,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116261570] [2021-03-10 21:24:25,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:25,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:25,564 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:25,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116261570] [2021-03-10 21:24:25,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585566181] [2021-03-10 21:24:25,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:25,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:24:25,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:25,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:24:25,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:26,334 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:26,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:26,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2021-03-10 21:24:26,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905810295] [2021-03-10 21:24:26,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:24:26,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:26,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:24:26,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:24:26,335 INFO L87 Difference]: Start difference. First operand 25191 states and 80289 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:27,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:27,324 INFO L93 Difference]: Finished difference Result 25433 states and 80707 transitions. [2021-03-10 21:24:27,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:24:27,327 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:24:27,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:27,368 INFO L225 Difference]: With dead ends: 25433 [2021-03-10 21:24:27,368 INFO L226 Difference]: Without dead ends: 25420 [2021-03-10 21:24:27,368 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1277.3ms TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:24:27,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25420 states. [2021-03-10 21:24:27,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25420 to 25149. [2021-03-10 21:24:27,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25149 states, 25148 states have (on average 3.185819945920153) internal successors, (80117), 25148 states have internal predecessors, (80117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:27,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25149 states to 25149 states and 80117 transitions. [2021-03-10 21:24:27,794 INFO L78 Accepts]: Start accepts. Automaton has 25149 states and 80117 transitions. Word has length 25 [2021-03-10 21:24:27,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:27,794 INFO L480 AbstractCegarLoop]: Abstraction has 25149 states and 80117 transitions. [2021-03-10 21:24:27,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:27,794 INFO L276 IsEmpty]: Start isEmpty. Operand 25149 states and 80117 transitions. [2021-03-10 21:24:27,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:24:27,824 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:27,824 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:28,025 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable787,456 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:28,025 INFO L428 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:28,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:28,025 INFO L82 PathProgramCache]: Analyzing trace with hash -799705089, now seen corresponding path program 453 times [2021-03-10 21:24:28,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:28,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156030169] [2021-03-10 21:24:28,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:28,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:28,559 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:28,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156030169] [2021-03-10 21:24:28,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546239197] [2021-03-10 21:24:28,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:28,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:24:28,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:28,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:24:28,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:29,227 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:29,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:29,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 23 [2021-03-10 21:24:29,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244425822] [2021-03-10 21:24:29,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:24:29,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:29,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:24:29,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:24:29,228 INFO L87 Difference]: Start difference. First operand 25149 states and 80117 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:30,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:30,889 INFO L93 Difference]: Finished difference Result 26300 states and 83236 transitions. [2021-03-10 21:24:30,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:24:30,892 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:24:30,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:30,932 INFO L225 Difference]: With dead ends: 26300 [2021-03-10 21:24:30,933 INFO L226 Difference]: Without dead ends: 26283 [2021-03-10 21:24:30,933 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1317.0ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:24:30,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26283 states. [2021-03-10 21:24:31,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26283 to 25645. [2021-03-10 21:24:31,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25645 states, 25644 states have (on average 3.1899469661519264) internal successors, (81803), 25644 states have internal predecessors, (81803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:31,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25645 states to 25645 states and 81803 transitions. [2021-03-10 21:24:31,422 INFO L78 Accepts]: Start accepts. Automaton has 25645 states and 81803 transitions. Word has length 25 [2021-03-10 21:24:31,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:31,422 INFO L480 AbstractCegarLoop]: Abstraction has 25645 states and 81803 transitions. [2021-03-10 21:24:31,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:31,422 INFO L276 IsEmpty]: Start isEmpty. Operand 25645 states and 81803 transitions. [2021-03-10 21:24:31,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:24:31,455 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:31,455 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:31,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable790,457 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:31,656 INFO L428 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:31,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:31,656 INFO L82 PathProgramCache]: Analyzing trace with hash 814997635, now seen corresponding path program 454 times [2021-03-10 21:24:31,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:31,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894160816] [2021-03-10 21:24:31,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:31,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:32,234 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:32,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894160816] [2021-03-10 21:24:32,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951316908] [2021-03-10 21:24:32,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:32,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:24:32,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:32,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:24:32,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:32,955 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:32,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:32,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 23 [2021-03-10 21:24:32,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429650478] [2021-03-10 21:24:32,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:24:32,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:32,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:24:32,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:24:32,955 INFO L87 Difference]: Start difference. First operand 25645 states and 81803 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:34,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:34,594 INFO L93 Difference]: Finished difference Result 26302 states and 83129 transitions. [2021-03-10 21:24:34,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:24:34,596 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:24:34,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:34,637 INFO L225 Difference]: With dead ends: 26302 [2021-03-10 21:24:34,637 INFO L226 Difference]: Without dead ends: 26284 [2021-03-10 21:24:34,637 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1365.6ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:24:34,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26284 states. [2021-03-10 21:24:34,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26284 to 25519. [2021-03-10 21:24:34,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25519 states, 25518 states have (on average 3.186966063171095) internal successors, (81325), 25518 states have internal predecessors, (81325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:35,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25519 states to 25519 states and 81325 transitions. [2021-03-10 21:24:35,038 INFO L78 Accepts]: Start accepts. Automaton has 25519 states and 81325 transitions. Word has length 25 [2021-03-10 21:24:35,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:35,038 INFO L480 AbstractCegarLoop]: Abstraction has 25519 states and 81325 transitions. [2021-03-10 21:24:35,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:35,038 INFO L276 IsEmpty]: Start isEmpty. Operand 25519 states and 81325 transitions. [2021-03-10 21:24:35,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:24:35,069 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:35,069 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:35,270 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 458 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable793 [2021-03-10 21:24:35,270 INFO L428 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:35,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:35,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1264296193, now seen corresponding path program 455 times [2021-03-10 21:24:35,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:35,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811399608] [2021-03-10 21:24:35,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:35,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:35,763 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:35,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811399608] [2021-03-10 21:24:35,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874850388] [2021-03-10 21:24:35,764 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:35,784 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:24:35,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:35,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:24:35,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:36,434 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:36,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:36,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 22 [2021-03-10 21:24:36,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207192481] [2021-03-10 21:24:36,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:24:36,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:36,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:24:36,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:24:36,435 INFO L87 Difference]: Start difference. First operand 25519 states and 81325 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:38,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:38,106 INFO L93 Difference]: Finished difference Result 26169 states and 82620 transitions. [2021-03-10 21:24:38,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:24:38,109 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:24:38,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:38,151 INFO L225 Difference]: With dead ends: 26169 [2021-03-10 21:24:38,151 INFO L226 Difference]: Without dead ends: 26147 [2021-03-10 21:24:38,151 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1280.3ms TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:24:38,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26147 states. [2021-03-10 21:24:38,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26147 to 25469. [2021-03-10 21:24:38,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25469 states, 25468 states have (on average 3.1853698759227265) internal successors, (81125), 25468 states have internal predecessors, (81125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:38,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25469 states to 25469 states and 81125 transitions. [2021-03-10 21:24:38,648 INFO L78 Accepts]: Start accepts. Automaton has 25469 states and 81125 transitions. Word has length 25 [2021-03-10 21:24:38,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:38,649 INFO L480 AbstractCegarLoop]: Abstraction has 25469 states and 81125 transitions. [2021-03-10 21:24:38,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:38,649 INFO L276 IsEmpty]: Start isEmpty. Operand 25469 states and 81125 transitions. [2021-03-10 21:24:38,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:24:38,678 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:38,678 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:38,878 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable796,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:38,878 INFO L428 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:38,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:38,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1297895421, now seen corresponding path program 456 times [2021-03-10 21:24:38,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:38,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823677351] [2021-03-10 21:24:38,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:38,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:39,462 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:39,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823677351] [2021-03-10 21:24:39,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776477371] [2021-03-10 21:24:39,462 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:39,483 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:24:39,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:39,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:24:39,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:40,173 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:40,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:40,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 22 [2021-03-10 21:24:40,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816932177] [2021-03-10 21:24:40,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:24:40,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:40,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:24:40,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:24:40,174 INFO L87 Difference]: Start difference. First operand 25469 states and 81125 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:41,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:41,992 INFO L93 Difference]: Finished difference Result 26109 states and 82367 transitions. [2021-03-10 21:24:41,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:24:41,994 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:24:41,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:42,037 INFO L225 Difference]: With dead ends: 26109 [2021-03-10 21:24:42,037 INFO L226 Difference]: Without dead ends: 26083 [2021-03-10 21:24:42,037 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1484.2ms TimeCoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:24:42,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26083 states. [2021-03-10 21:24:42,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26083 to 25423. [2021-03-10 21:24:42,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25423 states, 25422 states have (on average 3.1845645503894264) internal successors, (80958), 25422 states have internal predecessors, (80958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:42,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25423 states to 25423 states and 80958 transitions. [2021-03-10 21:24:42,472 INFO L78 Accepts]: Start accepts. Automaton has 25423 states and 80958 transitions. Word has length 25 [2021-03-10 21:24:42,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:42,473 INFO L480 AbstractCegarLoop]: Abstraction has 25423 states and 80958 transitions. [2021-03-10 21:24:42,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:42,473 INFO L276 IsEmpty]: Start isEmpty. Operand 25423 states and 80958 transitions. [2021-03-10 21:24:42,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:24:42,500 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:42,500 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:42,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable799,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:42,701 INFO L428 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:42,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:42,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1955495807, now seen corresponding path program 457 times [2021-03-10 21:24:42,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:42,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129741943] [2021-03-10 21:24:42,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:42,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:43,280 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:43,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129741943] [2021-03-10 21:24:43,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279012067] [2021-03-10 21:24:43,280 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:43,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:43,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:24:43,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:44,022 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:44,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:44,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 22 [2021-03-10 21:24:44,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363939538] [2021-03-10 21:24:44,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:24:44,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:44,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:24:44,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:24:44,023 INFO L87 Difference]: Start difference. First operand 25423 states and 80958 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:46,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:46,022 INFO L93 Difference]: Finished difference Result 25930 states and 81933 transitions. [2021-03-10 21:24:46,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:24:46,024 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:24:46,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:46,064 INFO L225 Difference]: With dead ends: 25930 [2021-03-10 21:24:46,064 INFO L226 Difference]: Without dead ends: 25900 [2021-03-10 21:24:46,064 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1542.2ms TimeCoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:24:46,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25900 states. [2021-03-10 21:24:46,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25900 to 25388. [2021-03-10 21:24:46,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25388 states, 25387 states have (on average 3.184425099460354) internal successors, (80843), 25387 states have internal predecessors, (80843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:46,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25388 states to 25388 states and 80843 transitions. [2021-03-10 21:24:46,517 INFO L78 Accepts]: Start accepts. Automaton has 25388 states and 80843 transitions. Word has length 25 [2021-03-10 21:24:46,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:46,517 INFO L480 AbstractCegarLoop]: Abstraction has 25388 states and 80843 transitions. [2021-03-10 21:24:46,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:46,517 INFO L276 IsEmpty]: Start isEmpty. Operand 25388 states and 80843 transitions. [2021-03-10 21:24:46,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:24:46,544 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:46,544 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:46,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable802 [2021-03-10 21:24:46,745 INFO L428 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:46,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:46,745 INFO L82 PathProgramCache]: Analyzing trace with hash -268591229, now seen corresponding path program 458 times [2021-03-10 21:24:46,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:46,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191298445] [2021-03-10 21:24:46,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:46,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:47,303 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:47,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191298445] [2021-03-10 21:24:47,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064873368] [2021-03-10 21:24:47,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:47,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:24:47,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:47,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:24:47,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:47,907 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:47,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:47,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 22 [2021-03-10 21:24:47,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682244178] [2021-03-10 21:24:47,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:24:47,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:47,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:24:47,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:24:47,908 INFO L87 Difference]: Start difference. First operand 25388 states and 80843 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:49,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:49,879 INFO L93 Difference]: Finished difference Result 25727 states and 81464 transitions. [2021-03-10 21:24:49,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:24:49,882 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:24:49,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:49,924 INFO L225 Difference]: With dead ends: 25727 [2021-03-10 21:24:49,924 INFO L226 Difference]: Without dead ends: 25720 [2021-03-10 21:24:49,924 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1360.8ms TimeCoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:24:49,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25720 states. [2021-03-10 21:24:50,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25720 to 25388. [2021-03-10 21:24:50,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25388 states, 25387 states have (on average 3.184425099460354) internal successors, (80843), 25387 states have internal predecessors, (80843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:50,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25388 states to 25388 states and 80843 transitions. [2021-03-10 21:24:50,342 INFO L78 Accepts]: Start accepts. Automaton has 25388 states and 80843 transitions. Word has length 25 [2021-03-10 21:24:50,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:50,342 INFO L480 AbstractCegarLoop]: Abstraction has 25388 states and 80843 transitions. [2021-03-10 21:24:50,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:50,342 INFO L276 IsEmpty]: Start isEmpty. Operand 25388 states and 80843 transitions. [2021-03-10 21:24:50,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:24:50,370 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:50,370 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:50,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable805,462 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:50,571 INFO L428 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:50,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:50,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1989488811, now seen corresponding path program 459 times [2021-03-10 21:24:50,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:50,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309425227] [2021-03-10 21:24:50,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:50,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:51,118 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:51,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309425227] [2021-03-10 21:24:51,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539045966] [2021-03-10 21:24:51,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:51,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:24:51,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:51,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:24:51,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:51,859 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:51,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:51,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2021-03-10 21:24:51,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250732957] [2021-03-10 21:24:51,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:24:51,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:51,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:24:51,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:24:51,860 INFO L87 Difference]: Start difference. First operand 25388 states and 80843 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:52,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:52,924 INFO L93 Difference]: Finished difference Result 25601 states and 81204 transitions. [2021-03-10 21:24:52,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:24:52,926 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:24:52,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:52,964 INFO L225 Difference]: With dead ends: 25601 [2021-03-10 21:24:52,964 INFO L226 Difference]: Without dead ends: 25588 [2021-03-10 21:24:52,964 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1283.0ms TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:24:52,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25588 states. [2021-03-10 21:24:53,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25588 to 25330. [2021-03-10 21:24:53,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25330 states, 25329 states have (on average 3.1820837774882547) internal successors, (80599), 25329 states have internal predecessors, (80599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:53,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25330 states to 25330 states and 80599 transitions. [2021-03-10 21:24:53,413 INFO L78 Accepts]: Start accepts. Automaton has 25330 states and 80599 transitions. Word has length 25 [2021-03-10 21:24:53,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:53,413 INFO L480 AbstractCegarLoop]: Abstraction has 25330 states and 80599 transitions. [2021-03-10 21:24:53,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:53,413 INFO L276 IsEmpty]: Start isEmpty. Operand 25330 states and 80599 transitions. [2021-03-10 21:24:53,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:24:53,440 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:53,440 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:53,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable808,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:53,640 INFO L428 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:53,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:53,640 INFO L82 PathProgramCache]: Analyzing trace with hash -2132685253, now seen corresponding path program 460 times [2021-03-10 21:24:53,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:53,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567352604] [2021-03-10 21:24:53,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:53,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:54,184 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:54,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567352604] [2021-03-10 21:24:54,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269789152] [2021-03-10 21:24:54,185 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:54,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:24:54,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:54,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:24:54,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:54,851 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:54,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:54,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 23 [2021-03-10 21:24:54,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206003593] [2021-03-10 21:24:54,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:24:54,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:54,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:24:54,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:24:54,852 INFO L87 Difference]: Start difference. First operand 25330 states and 80599 transitions. Second operand has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:56,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:56,603 INFO L93 Difference]: Finished difference Result 26240 states and 82962 transitions. [2021-03-10 21:24:56,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:24:56,605 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:24:56,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:56,646 INFO L225 Difference]: With dead ends: 26240 [2021-03-10 21:24:56,646 INFO L226 Difference]: Without dead ends: 26223 [2021-03-10 21:24:56,646 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1306.2ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:24:56,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26223 states. [2021-03-10 21:24:56,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26223 to 25777. [2021-03-10 21:24:57,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25777 states, 25776 states have (on average 3.1840083798882683) internal successors, (82071), 25776 states have internal predecessors, (82071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:57,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25777 states to 25777 states and 82071 transitions. [2021-03-10 21:24:57,051 INFO L78 Accepts]: Start accepts. Automaton has 25777 states and 82071 transitions. Word has length 25 [2021-03-10 21:24:57,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:57,051 INFO L480 AbstractCegarLoop]: Abstraction has 25777 states and 82071 transitions. [2021-03-10 21:24:57,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:57,051 INFO L276 IsEmpty]: Start isEmpty. Operand 25777 states and 82071 transitions. [2021-03-10 21:24:57,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:24:57,084 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:57,084 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:57,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable811 [2021-03-10 21:24:57,284 INFO L428 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:57,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:57,284 INFO L82 PathProgramCache]: Analyzing trace with hash -517982529, now seen corresponding path program 461 times [2021-03-10 21:24:57,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:57,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167166533] [2021-03-10 21:24:57,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:57,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:57,824 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:57,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167166533] [2021-03-10 21:24:57,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093466731] [2021-03-10 21:24:57,824 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:57,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:24:57,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:57,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:24:57,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:58,526 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:58,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:58,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 23 [2021-03-10 21:24:58,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610783282] [2021-03-10 21:24:58,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:24:58,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:58,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:24:58,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:24:58,527 INFO L87 Difference]: Start difference. First operand 25777 states and 82071 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:00,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:00,312 INFO L93 Difference]: Finished difference Result 26238 states and 82828 transitions. [2021-03-10 21:25:00,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:25:00,314 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:25:00,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:00,354 INFO L225 Difference]: With dead ends: 26238 [2021-03-10 21:25:00,354 INFO L226 Difference]: Without dead ends: 26220 [2021-03-10 21:25:00,354 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1285.9ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:25:00,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26220 states. [2021-03-10 21:25:00,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26220 to 25645. [2021-03-10 21:25:00,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25645 states, 25644 states have (on average 3.181913897987833) internal successors, (81597), 25644 states have internal predecessors, (81597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:00,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25645 states to 25645 states and 81597 transitions. [2021-03-10 21:25:00,836 INFO L78 Accepts]: Start accepts. Automaton has 25645 states and 81597 transitions. Word has length 25 [2021-03-10 21:25:00,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:00,836 INFO L480 AbstractCegarLoop]: Abstraction has 25645 states and 81597 transitions. [2021-03-10 21:25:00,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:00,837 INFO L276 IsEmpty]: Start isEmpty. Operand 25645 states and 81597 transitions. [2021-03-10 21:25:00,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:25:00,870 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:00,870 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:01,070 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable814,465 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:01,070 INFO L428 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:01,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:01,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1697690939, now seen corresponding path program 462 times [2021-03-10 21:25:01,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:01,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932830341] [2021-03-10 21:25:01,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:01,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:01,706 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:01,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932830341] [2021-03-10 21:25:01,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642939930] [2021-03-10 21:25:01,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:01,728 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:25:01,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:01,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:25:01,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:02,543 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:02,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:02,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-03-10 21:25:02,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3647076] [2021-03-10 21:25:02,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:25:02,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:02,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:25:02,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:25:02,544 INFO L87 Difference]: Start difference. First operand 25645 states and 81597 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:04,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:04,447 INFO L93 Difference]: Finished difference Result 26128 states and 82385 transitions. [2021-03-10 21:25:04,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:25:04,450 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:25:04,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:04,495 INFO L225 Difference]: With dead ends: 26128 [2021-03-10 21:25:04,495 INFO L226 Difference]: Without dead ends: 26106 [2021-03-10 21:25:04,495 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1540.0ms TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:25:04,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26106 states. [2021-03-10 21:25:04,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26106 to 25607. [2021-03-10 21:25:04,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25607 states, 25606 states have (on average 3.180465515894712) internal successors, (81439), 25606 states have internal predecessors, (81439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:04,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25607 states to 25607 states and 81439 transitions. [2021-03-10 21:25:04,903 INFO L78 Accepts]: Start accepts. Automaton has 25607 states and 81439 transitions. Word has length 25 [2021-03-10 21:25:04,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:04,903 INFO L480 AbstractCegarLoop]: Abstraction has 25607 states and 81439 transitions. [2021-03-10 21:25:04,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:04,903 INFO L276 IsEmpty]: Start isEmpty. Operand 25607 states and 81439 transitions. [2021-03-10 21:25:04,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:25:04,935 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:04,935 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:05,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable817,466 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:05,135 INFO L428 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:05,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:05,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1664091711, now seen corresponding path program 463 times [2021-03-10 21:25:05,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:05,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290115942] [2021-03-10 21:25:05,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:05,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:05,660 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:05,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290115942] [2021-03-10 21:25:05,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185112312] [2021-03-10 21:25:05,660 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:25:05,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:05,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:25:05,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:06,343 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:06,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:06,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-03-10 21:25:06,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358185600] [2021-03-10 21:25:06,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:25:06,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:06,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:25:06,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:25:06,344 INFO L87 Difference]: Start difference. First operand 25607 states and 81439 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:08,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:08,273 INFO L93 Difference]: Finished difference Result 26123 states and 82279 transitions. [2021-03-10 21:25:08,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:25:08,275 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:25:08,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:08,316 INFO L225 Difference]: With dead ends: 26123 [2021-03-10 21:25:08,316 INFO L226 Difference]: Without dead ends: 26097 [2021-03-10 21:25:08,316 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1427.9ms TimeCoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:25:08,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26097 states. [2021-03-10 21:25:08,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26097 to 25568. [2021-03-10 21:25:08,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25568 states, 25567 states have (on average 3.179645636953886) internal successors, (81294), 25567 states have internal predecessors, (81294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:08,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25568 states to 25568 states and 81294 transitions. [2021-03-10 21:25:08,785 INFO L78 Accepts]: Start accepts. Automaton has 25568 states and 81294 transitions. Word has length 25 [2021-03-10 21:25:08,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:08,785 INFO L480 AbstractCegarLoop]: Abstraction has 25568 states and 81294 transitions. [2021-03-10 21:25:08,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:08,785 INFO L276 IsEmpty]: Start isEmpty. Operand 25568 states and 81294 transitions. [2021-03-10 21:25:08,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:25:08,816 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:08,816 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:09,017 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable820,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:09,017 INFO L428 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:09,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:09,017 INFO L82 PathProgramCache]: Analyzing trace with hash 622515643, now seen corresponding path program 464 times [2021-03-10 21:25:09,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:09,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200745361] [2021-03-10 21:25:09,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:09,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:09,591 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:09,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200745361] [2021-03-10 21:25:09,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388916451] [2021-03-10 21:25:09,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:09,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:25:09,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:09,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:25:09,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:10,258 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:10,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:10,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-03-10 21:25:10,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72726998] [2021-03-10 21:25:10,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:25:10,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:10,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:25:10,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:25:10,259 INFO L87 Difference]: Start difference. First operand 25568 states and 81294 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:12,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:12,820 INFO L93 Difference]: Finished difference Result 26123 states and 82191 transitions. [2021-03-10 21:25:12,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:25:12,823 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:25:12,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:12,866 INFO L225 Difference]: With dead ends: 26123 [2021-03-10 21:25:12,866 INFO L226 Difference]: Without dead ends: 26093 [2021-03-10 21:25:12,866 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1526.7ms TimeCoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:25:12,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26093 states. [2021-03-10 21:25:13,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26093 to 25530. [2021-03-10 21:25:13,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25530 states, 25529 states have (on average 3.179286301852795) internal successors, (81164), 25529 states have internal predecessors, (81164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:13,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25530 states to 25530 states and 81164 transitions. [2021-03-10 21:25:13,300 INFO L78 Accepts]: Start accepts. Automaton has 25530 states and 81164 transitions. Word has length 25 [2021-03-10 21:25:13,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:13,300 INFO L480 AbstractCegarLoop]: Abstraction has 25530 states and 81164 transitions. [2021-03-10 21:25:13,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:13,300 INFO L276 IsEmpty]: Start isEmpty. Operand 25530 states and 81164 transitions. [2021-03-10 21:25:13,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:25:13,329 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:13,329 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:13,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable823,468 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:13,529 INFO L428 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:13,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:13,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1601571393, now seen corresponding path program 465 times [2021-03-10 21:25:13,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:13,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95752299] [2021-03-10 21:25:13,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:13,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:14,160 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:14,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95752299] [2021-03-10 21:25:14,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199429407] [2021-03-10 21:25:14,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:14,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:25:14,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:14,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:25:14,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:14,862 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:14,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:14,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-03-10 21:25:14,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360021536] [2021-03-10 21:25:14,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:25:14,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:14,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:25:14,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:25:14,863 INFO L87 Difference]: Start difference. First operand 25530 states and 81164 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:17,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:17,483 INFO L93 Difference]: Finished difference Result 25971 states and 81876 transitions. [2021-03-10 21:25:17,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:25:17,485 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:25:17,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:17,524 INFO L225 Difference]: With dead ends: 25971 [2021-03-10 21:25:17,524 INFO L226 Difference]: Without dead ends: 25937 [2021-03-10 21:25:17,524 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1700.3ms TimeCoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:25:17,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25937 states. [2021-03-10 21:25:17,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25937 to 25500. [2021-03-10 21:25:17,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25500 states, 25499 states have (on average 3.179379583513079) internal successors, (81071), 25499 states have internal predecessors, (81071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:17,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25500 states to 25500 states and 81071 transitions. [2021-03-10 21:25:17,995 INFO L78 Accepts]: Start accepts. Automaton has 25500 states and 81071 transitions. Word has length 25 [2021-03-10 21:25:17,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:17,995 INFO L480 AbstractCegarLoop]: Abstraction has 25500 states and 81071 transitions. [2021-03-10 21:25:17,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:17,995 INFO L276 IsEmpty]: Start isEmpty. Operand 25500 states and 81071 transitions. [2021-03-10 21:25:18,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:25:18,023 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:18,023 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:18,223 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable826,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:18,224 INFO L428 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:18,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:18,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1828792773, now seen corresponding path program 466 times [2021-03-10 21:25:18,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:18,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945969464] [2021-03-10 21:25:18,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:18,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:18,814 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:18,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945969464] [2021-03-10 21:25:18,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533991696] [2021-03-10 21:25:18,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:18,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:25:18,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:18,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:25:18,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:19,554 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:19,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:19,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-03-10 21:25:19,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949362191] [2021-03-10 21:25:19,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:25:19,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:19,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:25:19,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:25:19,555 INFO L87 Difference]: Start difference. First operand 25500 states and 81071 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:21,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:21,971 INFO L93 Difference]: Finished difference Result 25807 states and 81556 transitions. [2021-03-10 21:25:21,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:25:21,974 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:25:21,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:22,014 INFO L225 Difference]: With dead ends: 25807 [2021-03-10 21:25:22,014 INFO L226 Difference]: Without dead ends: 25800 [2021-03-10 21:25:22,014 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1605.7ms TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:25:22,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25800 states. [2021-03-10 21:25:22,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25800 to 25502. [2021-03-10 21:25:22,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25502 states, 25501 states have (on average 3.1792478726324456) internal successors, (81074), 25501 states have internal predecessors, (81074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:22,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25502 states to 25502 states and 81074 transitions. [2021-03-10 21:25:22,421 INFO L78 Accepts]: Start accepts. Automaton has 25502 states and 81074 transitions. Word has length 25 [2021-03-10 21:25:22,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:22,421 INFO L480 AbstractCegarLoop]: Abstraction has 25502 states and 81074 transitions. [2021-03-10 21:25:22,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:22,421 INFO L276 IsEmpty]: Start isEmpty. Operand 25502 states and 81074 transitions. [2021-03-10 21:25:22,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:25:22,447 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:22,447 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:22,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable829,470 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:22,648 INFO L428 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:22,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:22,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1821120793, now seen corresponding path program 467 times [2021-03-10 21:25:22,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:22,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055139977] [2021-03-10 21:25:22,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:22,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:23,257 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:23,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055139977] [2021-03-10 21:25:23,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135696935] [2021-03-10 21:25:23,258 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:23,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:25:23,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:23,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:25:23,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:24,121 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:24,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:24,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2021-03-10 21:25:24,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483059438] [2021-03-10 21:25:24,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:25:24,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:24,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:25:24,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:25:24,122 INFO L87 Difference]: Start difference. First operand 25502 states and 81074 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:25,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:25,263 INFO L93 Difference]: Finished difference Result 25654 states and 81322 transitions. [2021-03-10 21:25:25,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:25:25,266 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:25:25,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:25,306 INFO L225 Difference]: With dead ends: 25654 [2021-03-10 21:25:25,307 INFO L226 Difference]: Without dead ends: 25641 [2021-03-10 21:25:25,307 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1453.0ms TimeCoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:25:25,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25641 states. [2021-03-10 21:25:25,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25641 to 25457. [2021-03-10 21:25:25,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25457 states, 25456 states have (on average 3.179525455688246) internal successors, (80938), 25456 states have internal predecessors, (80938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:25,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25457 states to 25457 states and 80938 transitions. [2021-03-10 21:25:25,784 INFO L78 Accepts]: Start accepts. Automaton has 25457 states and 80938 transitions. Word has length 25 [2021-03-10 21:25:25,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:25,784 INFO L480 AbstractCegarLoop]: Abstraction has 25457 states and 80938 transitions. [2021-03-10 21:25:25,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:25,784 INFO L276 IsEmpty]: Start isEmpty. Operand 25457 states and 80938 transitions. [2021-03-10 21:25:25,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:25:25,813 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:25,813 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:26,013 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable832 [2021-03-10 21:25:26,014 INFO L428 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:26,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:26,014 INFO L82 PathProgramCache]: Analyzing trace with hash -505397377, now seen corresponding path program 468 times [2021-03-10 21:25:26,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:26,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325735133] [2021-03-10 21:25:26,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:26,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:26,682 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:26,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325735133] [2021-03-10 21:25:26,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760077387] [2021-03-10 21:25:26,682 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:26,703 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:25:26,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:26,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:25:26,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:27,428 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:27,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:27,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2021-03-10 21:25:27,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746194144] [2021-03-10 21:25:27,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:25:27,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:27,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:25:27,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:25:27,428 INFO L87 Difference]: Start difference. First operand 25457 states and 80938 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 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) [2021-03-10 21:25:29,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:29,170 INFO L93 Difference]: Finished difference Result 26445 states and 83499 transitions. [2021-03-10 21:25:29,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:25:29,173 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 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 25 [2021-03-10 21:25:29,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:29,212 INFO L225 Difference]: With dead ends: 26445 [2021-03-10 21:25:29,212 INFO L226 Difference]: Without dead ends: 26428 [2021-03-10 21:25:29,212 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1488.9ms TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:25:29,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26428 states. [2021-03-10 21:25:29,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26428 to 26047. [2021-03-10 21:25:29,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26047 states, 26046 states have (on average 3.1769177608845887) internal successors, (82746), 26046 states have internal predecessors, (82746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:29,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26047 states to 26047 states and 82746 transitions. [2021-03-10 21:25:29,658 INFO L78 Accepts]: Start accepts. Automaton has 26047 states and 82746 transitions. Word has length 25 [2021-03-10 21:25:29,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:29,658 INFO L480 AbstractCegarLoop]: Abstraction has 26047 states and 82746 transitions. [2021-03-10 21:25:29,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 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) [2021-03-10 21:25:29,658 INFO L276 IsEmpty]: Start isEmpty. Operand 26047 states and 82746 transitions. [2021-03-10 21:25:29,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:25:29,692 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:29,692 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:29,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable835,472 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:29,892 INFO L428 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:29,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:29,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1109305347, now seen corresponding path program 469 times [2021-03-10 21:25:29,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:29,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064529423] [2021-03-10 21:25:29,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:29,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:30,536 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:30,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064529423] [2021-03-10 21:25:30,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752410983] [2021-03-10 21:25:30,537 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:25:30,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:30,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:25:30,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:31,270 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:31,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:31,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2021-03-10 21:25:31,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146577555] [2021-03-10 21:25:31,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:25:31,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:31,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:25:31,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:25:31,270 INFO L87 Difference]: Start difference. First operand 26047 states and 82746 transitions. Second operand has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:33,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:33,127 INFO L93 Difference]: Finished difference Result 26443 states and 83380 transitions. [2021-03-10 21:25:33,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:25:33,130 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:25:33,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:33,177 INFO L225 Difference]: With dead ends: 26443 [2021-03-10 21:25:33,178 INFO L226 Difference]: Without dead ends: 26427 [2021-03-10 21:25:33,178 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1467.4ms TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:25:33,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26427 states. [2021-03-10 21:25:33,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26427 to 26006. [2021-03-10 21:25:33,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26006 states, 26005 states have (on average 3.173658911747741) internal successors, (82531), 26005 states have internal predecessors, (82531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:33,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26006 states to 26006 states and 82531 transitions. [2021-03-10 21:25:33,685 INFO L78 Accepts]: Start accepts. Automaton has 26006 states and 82531 transitions. Word has length 25 [2021-03-10 21:25:33,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:33,685 INFO L480 AbstractCegarLoop]: Abstraction has 26006 states and 82531 transitions. [2021-03-10 21:25:33,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:33,686 INFO L276 IsEmpty]: Start isEmpty. Operand 26006 states and 82531 transitions. [2021-03-10 21:25:33,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:25:33,719 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:33,719 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:33,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable838,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:33,920 INFO L428 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:33,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:33,920 INFO L82 PathProgramCache]: Analyzing trace with hash -969988481, now seen corresponding path program 470 times [2021-03-10 21:25:33,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:33,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055559296] [2021-03-10 21:25:33,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:33,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:34,487 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:34,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055559296] [2021-03-10 21:25:34,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822266383] [2021-03-10 21:25:34,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:34,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:25:34,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:34,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:25:34,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:35,200 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:35,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:35,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-03-10 21:25:35,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318438154] [2021-03-10 21:25:35,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:25:35,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:35,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:25:35,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:25:35,201 INFO L87 Difference]: Start difference. First operand 26006 states and 82531 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:36,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:36,912 INFO L93 Difference]: Finished difference Result 26428 states and 83208 transitions. [2021-03-10 21:25:36,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:25:36,914 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:25:36,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:36,952 INFO L225 Difference]: With dead ends: 26428 [2021-03-10 21:25:36,953 INFO L226 Difference]: Without dead ends: 26410 [2021-03-10 21:25:36,953 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1386.5ms TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:25:36,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26410 states. [2021-03-10 21:25:37,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26410 to 25949. [2021-03-10 21:25:37,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25949 states, 25948 states have (on average 3.1697240635116386) internal successors, (82248), 25948 states have internal predecessors, (82248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:37,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25949 states to 25949 states and 82248 transitions. [2021-03-10 21:25:37,367 INFO L78 Accepts]: Start accepts. Automaton has 25949 states and 82248 transitions. Word has length 25 [2021-03-10 21:25:37,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:37,367 INFO L480 AbstractCegarLoop]: Abstraction has 25949 states and 82248 transitions. [2021-03-10 21:25:37,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:37,367 INFO L276 IsEmpty]: Start isEmpty. Operand 25949 states and 82248 transitions. [2021-03-10 21:25:37,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:25:37,400 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:37,400 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:37,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable841 [2021-03-10 21:25:37,600 INFO L428 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:37,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:37,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1003587709, now seen corresponding path program 471 times [2021-03-10 21:25:37,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:37,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422925805] [2021-03-10 21:25:37,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:37,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:38,200 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:38,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422925805] [2021-03-10 21:25:38,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224175699] [2021-03-10 21:25:38,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:38,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:25:38,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:38,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:25:38,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:38,988 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:38,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:38,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-03-10 21:25:38,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945816435] [2021-03-10 21:25:38,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:25:38,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:38,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:25:38,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:25:38,989 INFO L87 Difference]: Start difference. First operand 25949 states and 82248 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:41,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:41,111 INFO L93 Difference]: Finished difference Result 26398 states and 82966 transitions. [2021-03-10 21:25:41,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:25:41,115 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:25:41,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:41,156 INFO L225 Difference]: With dead ends: 26398 [2021-03-10 21:25:41,156 INFO L226 Difference]: Without dead ends: 26378 [2021-03-10 21:25:41,156 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1604.8ms TimeCoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:25:41,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26378 states. [2021-03-10 21:25:41,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26378 to 25877. [2021-03-10 21:25:41,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25877 states, 25876 states have (on average 3.166409027670428) internal successors, (81934), 25876 states have internal predecessors, (81934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:41,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25877 states to 25877 states and 81934 transitions. [2021-03-10 21:25:41,642 INFO L78 Accepts]: Start accepts. Automaton has 25877 states and 81934 transitions. Word has length 25 [2021-03-10 21:25:41,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:41,642 INFO L480 AbstractCegarLoop]: Abstraction has 25877 states and 81934 transitions. [2021-03-10 21:25:41,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:41,643 INFO L276 IsEmpty]: Start isEmpty. Operand 25877 states and 81934 transitions. [2021-03-10 21:25:41,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:25:41,676 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:41,676 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:41,877 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable844,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:41,877 INFO L428 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:41,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:41,877 INFO L82 PathProgramCache]: Analyzing trace with hash -2045163777, now seen corresponding path program 472 times [2021-03-10 21:25:41,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:41,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716768987] [2021-03-10 21:25:41,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:41,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:42,559 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:42,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716768987] [2021-03-10 21:25:42,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051241569] [2021-03-10 21:25:42,559 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:42,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:25:42,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:42,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:25:42,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:43,292 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:43,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:43,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-03-10 21:25:43,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341470627] [2021-03-10 21:25:43,293 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:25:43,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:43,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:25:43,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:25:43,293 INFO L87 Difference]: Start difference. First operand 25877 states and 81934 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:45,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:45,476 INFO L93 Difference]: Finished difference Result 26361 states and 82705 transitions. [2021-03-10 21:25:45,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:25:45,478 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:25:45,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:45,518 INFO L225 Difference]: With dead ends: 26361 [2021-03-10 21:25:45,518 INFO L226 Difference]: Without dead ends: 26339 [2021-03-10 21:25:45,518 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1684.9ms TimeCoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:25:45,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26339 states. [2021-03-10 21:25:45,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26339 to 25791. [2021-03-10 21:25:45,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25791 states, 25790 states have (on average 3.164831329972858) internal successors, (81621), 25790 states have internal predecessors, (81621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:45,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25791 states to 25791 states and 81621 transitions. [2021-03-10 21:25:45,944 INFO L78 Accepts]: Start accepts. Automaton has 25791 states and 81621 transitions. Word has length 25 [2021-03-10 21:25:45,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:45,944 INFO L480 AbstractCegarLoop]: Abstraction has 25791 states and 81621 transitions. [2021-03-10 21:25:45,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:45,944 INFO L276 IsEmpty]: Start isEmpty. Operand 25791 states and 81621 transitions. [2021-03-10 21:25:45,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:25:45,978 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:45,978 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:46,191 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable847,476 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:46,191 INFO L428 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:46,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:46,191 INFO L82 PathProgramCache]: Analyzing trace with hash 25716483, now seen corresponding path program 473 times [2021-03-10 21:25:46,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:46,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514569378] [2021-03-10 21:25:46,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:46,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:46,873 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:46,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514569378] [2021-03-10 21:25:46,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883382136] [2021-03-10 21:25:46,874 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:46,895 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:25:46,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:46,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:25:46,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:47,535 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:47,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:47,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-03-10 21:25:47,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043516384] [2021-03-10 21:25:47,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:25:47,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:47,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:25:47,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:25:47,536 INFO L87 Difference]: Start difference. First operand 25791 states and 81621 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:49,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:49,860 INFO L93 Difference]: Finished difference Result 26316 states and 82452 transitions. [2021-03-10 21:25:49,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:25:49,863 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:25:49,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:49,902 INFO L225 Difference]: With dead ends: 26316 [2021-03-10 21:25:49,902 INFO L226 Difference]: Without dead ends: 26292 [2021-03-10 21:25:49,902 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1700.1ms TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:25:49,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26292 states. [2021-03-10 21:25:50,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26292 to 25713. [2021-03-10 21:25:50,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25713 states, 25712 states have (on average 3.164281269446173) internal successors, (81360), 25712 states have internal predecessors, (81360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:50,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25713 states to 25713 states and 81360 transitions. [2021-03-10 21:25:50,358 INFO L78 Accepts]: Start accepts. Automaton has 25713 states and 81360 transitions. Word has length 25 [2021-03-10 21:25:50,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:50,358 INFO L480 AbstractCegarLoop]: Abstraction has 25713 states and 81360 transitions. [2021-03-10 21:25:50,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:50,358 INFO L276 IsEmpty]: Start isEmpty. Operand 25713 states and 81360 transitions. [2021-03-10 21:25:50,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:25:50,388 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:50,388 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:50,589 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 477 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable850 [2021-03-10 21:25:50,589 INFO L428 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:50,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:50,589 INFO L82 PathProgramCache]: Analyzing trace with hash -201504897, now seen corresponding path program 474 times [2021-03-10 21:25:50,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:50,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806902577] [2021-03-10 21:25:50,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:50,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:51,231 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:51,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806902577] [2021-03-10 21:25:51,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972812437] [2021-03-10 21:25:51,231 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:51,252 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:25:51,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:51,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:25:51,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:51,918 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:51,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:51,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-03-10 21:25:51,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61823653] [2021-03-10 21:25:51,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:25:51,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:51,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:25:51,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:25:51,919 INFO L87 Difference]: Start difference. First operand 25713 states and 81360 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:54,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:54,655 INFO L93 Difference]: Finished difference Result 26083 states and 81944 transitions. [2021-03-10 21:25:54,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:25:54,658 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:25:54,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:54,696 INFO L225 Difference]: With dead ends: 26083 [2021-03-10 21:25:54,696 INFO L226 Difference]: Without dead ends: 26057 [2021-03-10 21:25:54,696 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1759.8ms TimeCoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:25:54,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26057 states. [2021-03-10 21:25:55,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26057 to 25637. [2021-03-10 21:25:55,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25637 states, 25636 states have (on average 3.1651973786862224) internal successors, (81143), 25636 states have internal predecessors, (81143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:55,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25637 states to 25637 states and 81143 transitions. [2021-03-10 21:25:55,095 INFO L78 Accepts]: Start accepts. Automaton has 25637 states and 81143 transitions. Word has length 25 [2021-03-10 21:25:55,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:55,095 INFO L480 AbstractCegarLoop]: Abstraction has 25637 states and 81143 transitions. [2021-03-10 21:25:55,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:55,095 INFO L276 IsEmpty]: Start isEmpty. Operand 25637 states and 81143 transitions. [2021-03-10 21:25:55,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:25:55,126 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:55,126 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:55,326 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable853 [2021-03-10 21:25:55,326 INFO L428 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:55,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:55,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1344566915, now seen corresponding path program 475 times [2021-03-10 21:25:55,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:55,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511273404] [2021-03-10 21:25:55,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:55,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:56,015 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:56,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511273404] [2021-03-10 21:25:56,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940863854] [2021-03-10 21:25:56,015 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:56,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:56,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:25:56,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:56,691 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:56,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:56,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-03-10 21:25:56,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142562032] [2021-03-10 21:25:56,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:25:56,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:56,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:25:56,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:25:56,692 INFO L87 Difference]: Start difference. First operand 25637 states and 81143 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:59,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:59,406 INFO L93 Difference]: Finished difference Result 25903 states and 81553 transitions. [2021-03-10 21:25:59,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:25:59,409 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:25:59,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:59,448 INFO L225 Difference]: With dead ends: 25903 [2021-03-10 21:25:59,448 INFO L226 Difference]: Without dead ends: 25896 [2021-03-10 21:25:59,448 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1663.5ms TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:25:59,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25896 states. [2021-03-10 21:25:59,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25896 to 25651. [2021-03-10 21:25:59,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25651 states, 25650 states have (on average 3.164288499025341) internal successors, (81164), 25650 states have internal predecessors, (81164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:59,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25651 states to 25651 states and 81164 transitions. [2021-03-10 21:25:59,859 INFO L78 Accepts]: Start accepts. Automaton has 25651 states and 81164 transitions. Word has length 25 [2021-03-10 21:25:59,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:59,859 INFO L480 AbstractCegarLoop]: Abstraction has 25651 states and 81164 transitions. [2021-03-10 21:25:59,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:59,860 INFO L276 IsEmpty]: Start isEmpty. Operand 25651 states and 81164 transitions. [2021-03-10 21:25:59,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:25:59,893 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:59,893 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:00,094 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable856,479 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:00,094 INFO L428 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:00,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:00,094 INFO L82 PathProgramCache]: Analyzing trace with hash -880520577, now seen corresponding path program 476 times [2021-03-10 21:26:00,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:00,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695623094] [2021-03-10 21:26:00,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:00,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:00,722 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:00,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695623094] [2021-03-10 21:26:00,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522107676] [2021-03-10 21:26:00,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:00,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:26:00,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:00,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:26:00,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:01,579 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:01,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:01,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 23 [2021-03-10 21:26:01,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667046873] [2021-03-10 21:26:01,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:26:01,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:01,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:26:01,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:26:01,580 INFO L87 Difference]: Start difference. First operand 25651 states and 81164 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:02,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:02,763 INFO L93 Difference]: Finished difference Result 26339 states and 82876 transitions. [2021-03-10 21:26:02,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:26:02,766 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:26:02,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:02,805 INFO L225 Difference]: With dead ends: 26339 [2021-03-10 21:26:02,806 INFO L226 Difference]: Without dead ends: 26329 [2021-03-10 21:26:02,806 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1476.0ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:26:02,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26329 states. [2021-03-10 21:26:03,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26329 to 25789. [2021-03-10 21:26:03,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25789 states, 25788 states have (on average 3.167248332557779) internal successors, (81677), 25788 states have internal predecessors, (81677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:03,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25789 states to 25789 states and 81677 transitions. [2021-03-10 21:26:03,202 INFO L78 Accepts]: Start accepts. Automaton has 25789 states and 81677 transitions. Word has length 25 [2021-03-10 21:26:03,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:03,202 INFO L480 AbstractCegarLoop]: Abstraction has 25789 states and 81677 transitions. [2021-03-10 21:26:03,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:03,202 INFO L276 IsEmpty]: Start isEmpty. Operand 25789 states and 81677 transitions. [2021-03-10 21:26:03,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:26:03,234 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:03,234 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:03,434 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 480 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable859 [2021-03-10 21:26:03,434 INFO L428 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:03,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:03,434 INFO L82 PathProgramCache]: Analyzing trace with hash 734182147, now seen corresponding path program 477 times [2021-03-10 21:26:03,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:03,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097242671] [2021-03-10 21:26:03,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:03,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:04,109 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:04,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097242671] [2021-03-10 21:26:04,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671675863] [2021-03-10 21:26:04,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:04,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:26:04,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:04,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:26:04,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:05,118 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:05,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:05,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 23 [2021-03-10 21:26:05,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927615268] [2021-03-10 21:26:05,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:26:05,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:05,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:26:05,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:26:05,119 INFO L87 Difference]: Start difference. First operand 25789 states and 81677 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:06,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:06,315 INFO L93 Difference]: Finished difference Result 26321 states and 82830 transitions. [2021-03-10 21:26:06,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:26:06,318 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:26:06,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:06,445 INFO L225 Difference]: With dead ends: 26321 [2021-03-10 21:26:06,445 INFO L226 Difference]: Without dead ends: 26314 [2021-03-10 21:26:06,445 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1619.0ms TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:26:06,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26314 states. [2021-03-10 21:26:06,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26314 to 25787. [2021-03-10 21:26:06,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25787 states, 25786 states have (on average 3.1671837431164196) internal successors, (81669), 25786 states have internal predecessors, (81669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:06,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25787 states to 25787 states and 81669 transitions. [2021-03-10 21:26:06,803 INFO L78 Accepts]: Start accepts. Automaton has 25787 states and 81669 transitions. Word has length 25 [2021-03-10 21:26:06,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:06,803 INFO L480 AbstractCegarLoop]: Abstraction has 25787 states and 81669 transitions. [2021-03-10 21:26:06,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:06,803 INFO L276 IsEmpty]: Start isEmpty. Operand 25787 states and 81669 transitions. [2021-03-10 21:26:06,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:26:06,836 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:06,836 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:07,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 481 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable862 [2021-03-10 21:26:07,036 INFO L428 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:07,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:07,036 INFO L82 PathProgramCache]: Analyzing trace with hash -309065771, now seen corresponding path program 478 times [2021-03-10 21:26:07,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:07,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414329838] [2021-03-10 21:26:07,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:07,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:07,641 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:07,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414329838] [2021-03-10 21:26:07,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146124125] [2021-03-10 21:26:07,641 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:07,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:26:07,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:07,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:26:07,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:08,598 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:08,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:08,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2021-03-10 21:26:08,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838052094] [2021-03-10 21:26:08,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:26:08,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:08,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:26:08,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:26:08,599 INFO L87 Difference]: Start difference. First operand 25787 states and 81669 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:09,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:09,991 INFO L93 Difference]: Finished difference Result 26101 states and 82243 transitions. [2021-03-10 21:26:09,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:26:09,994 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:26:09,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:10,035 INFO L225 Difference]: With dead ends: 26101 [2021-03-10 21:26:10,035 INFO L226 Difference]: Without dead ends: 26094 [2021-03-10 21:26:10,036 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1556.7ms TimeCoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:26:10,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26094 states. [2021-03-10 21:26:10,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26094 to 25786. [2021-03-10 21:26:10,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25786 states, 25785 states have (on average 3.1671902268760905) internal successors, (81666), 25785 states have internal predecessors, (81666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:10,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25786 states to 25786 states and 81666 transitions. [2021-03-10 21:26:10,443 INFO L78 Accepts]: Start accepts. Automaton has 25786 states and 81666 transitions. Word has length 25 [2021-03-10 21:26:10,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:10,443 INFO L480 AbstractCegarLoop]: Abstraction has 25786 states and 81666 transitions. [2021-03-10 21:26:10,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:10,443 INFO L276 IsEmpty]: Start isEmpty. Operand 25786 states and 81666 transitions. [2021-03-10 21:26:10,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:26:10,475 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:10,475 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:10,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable865 [2021-03-10 21:26:10,676 INFO L428 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:10,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:10,676 INFO L82 PathProgramCache]: Analyzing trace with hash 375562111, now seen corresponding path program 479 times [2021-03-10 21:26:10,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:10,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638668505] [2021-03-10 21:26:10,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:10,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:11,326 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:11,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638668505] [2021-03-10 21:26:11,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139260306] [2021-03-10 21:26:11,327 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:26:11,348 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:26:11,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:11,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:26:11,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:12,239 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:12,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:12,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 23 [2021-03-10 21:26:12,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269722730] [2021-03-10 21:26:12,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:26:12,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:12,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:26:12,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:26:12,239 INFO L87 Difference]: Start difference. First operand 25786 states and 81666 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:13,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:13,612 INFO L93 Difference]: Finished difference Result 26623 states and 83970 transitions. [2021-03-10 21:26:13,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:26:13,615 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:26:13,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:13,655 INFO L225 Difference]: With dead ends: 26623 [2021-03-10 21:26:13,655 INFO L226 Difference]: Without dead ends: 26613 [2021-03-10 21:26:13,655 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1560.0ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:26:13,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26613 states. [2021-03-10 21:26:14,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26613 to 26000. [2021-03-10 21:26:14,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26000 states, 25999 states have (on average 3.1711219662294705) internal successors, (82446), 25999 states have internal predecessors, (82446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:14,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26000 states to 26000 states and 82446 transitions. [2021-03-10 21:26:14,119 INFO L78 Accepts]: Start accepts. Automaton has 26000 states and 82446 transitions. Word has length 25 [2021-03-10 21:26:14,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:14,119 INFO L480 AbstractCegarLoop]: Abstraction has 26000 states and 82446 transitions. [2021-03-10 21:26:14,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:14,119 INFO L276 IsEmpty]: Start isEmpty. Operand 26000 states and 82446 transitions. [2021-03-10 21:26:14,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:26:14,150 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:14,150 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:14,350 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable868,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:14,351 INFO L428 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:14,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:14,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1990264835, now seen corresponding path program 480 times [2021-03-10 21:26:14,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:14,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615644604] [2021-03-10 21:26:14,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:14,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:14,978 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:14,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615644604] [2021-03-10 21:26:14,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068209478] [2021-03-10 21:26:14,978 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 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 [2021-03-10 21:26:14,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:26:15,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:15,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:26:15,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:15,907 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:15,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:15,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 23 [2021-03-10 21:26:15,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60281707] [2021-03-10 21:26:15,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:26:15,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:15,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:26:15,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:26:15,908 INFO L87 Difference]: Start difference. First operand 26000 states and 82446 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:17,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:17,285 INFO L93 Difference]: Finished difference Result 26604 states and 83911 transitions. [2021-03-10 21:26:17,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:26:17,287 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:26:17,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:17,327 INFO L225 Difference]: With dead ends: 26604 [2021-03-10 21:26:17,327 INFO L226 Difference]: Without dead ends: 26597 [2021-03-10 21:26:17,327 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1539.7ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:26:17,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26597 states. [2021-03-10 21:26:17,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26597 to 25997. [2021-03-10 21:26:17,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25997 states, 25996 states have (on average 3.1710263117402677) internal successors, (82434), 25996 states have internal predecessors, (82434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:17,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25997 states to 25997 states and 82434 transitions. [2021-03-10 21:26:17,729 INFO L78 Accepts]: Start accepts. Automaton has 25997 states and 82434 transitions. Word has length 25 [2021-03-10 21:26:17,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:17,729 INFO L480 AbstractCegarLoop]: Abstraction has 25997 states and 82434 transitions. [2021-03-10 21:26:17,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:17,730 INFO L276 IsEmpty]: Start isEmpty. Operand 25997 states and 82434 transitions. [2021-03-10 21:26:17,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:26:17,761 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:17,761 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:17,961 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 484 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable871 [2021-03-10 21:26:17,961 INFO L428 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:17,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:17,962 INFO L82 PathProgramCache]: Analyzing trace with hash 947016917, now seen corresponding path program 481 times [2021-03-10 21:26:17,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:17,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282825288] [2021-03-10 21:26:17,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:17,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:18,598 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:18,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282825288] [2021-03-10 21:26:18,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570937186] [2021-03-10 21:26:18,598 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:18,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:18,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:26:18,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:19,511 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:19,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:19,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 22 [2021-03-10 21:26:19,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746179839] [2021-03-10 21:26:19,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:26:19,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:19,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:26:19,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:26:19,511 INFO L87 Difference]: Start difference. First operand 25997 states and 82434 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:21,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:21,117 INFO L93 Difference]: Finished difference Result 26449 states and 83488 transitions. [2021-03-10 21:26:21,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:26:21,120 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:26:21,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:21,160 INFO L225 Difference]: With dead ends: 26449 [2021-03-10 21:26:21,160 INFO L226 Difference]: Without dead ends: 26436 [2021-03-10 21:26:21,160 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1601.7ms TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:26:21,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26436 states. [2021-03-10 21:26:21,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26436 to 26004. [2021-03-10 21:26:21,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26004 states, 26003 states have (on average 3.1706341575972004) internal successors, (82446), 26003 states have internal predecessors, (82446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:21,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26004 states to 26004 states and 82446 transitions. [2021-03-10 21:26:21,625 INFO L78 Accepts]: Start accepts. Automaton has 26004 states and 82446 transitions. Word has length 25 [2021-03-10 21:26:21,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:21,625 INFO L480 AbstractCegarLoop]: Abstraction has 26004 states and 82446 transitions. [2021-03-10 21:26:21,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:21,625 INFO L276 IsEmpty]: Start isEmpty. Operand 26004 states and 82446 transitions. [2021-03-10 21:26:21,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:26:21,657 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:21,658 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:21,858 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable874,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:21,858 INFO L428 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:21,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:21,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1482246719, now seen corresponding path program 482 times [2021-03-10 21:26:21,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:21,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124218296] [2021-03-10 21:26:21,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:21,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:22,480 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:22,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124218296] [2021-03-10 21:26:22,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398113616] [2021-03-10 21:26:22,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:22,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:26:22,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:22,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:26:22,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:23,381 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:23,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:23,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 22 [2021-03-10 21:26:23,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362858479] [2021-03-10 21:26:23,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:26:23,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:23,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:26:23,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:26:23,382 INFO L87 Difference]: Start difference. First operand 26004 states and 82446 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:25,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:25,005 INFO L93 Difference]: Finished difference Result 26271 states and 82944 transitions. [2021-03-10 21:26:25,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:26:25,008 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:26:25,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:25,049 INFO L225 Difference]: With dead ends: 26271 [2021-03-10 21:26:25,049 INFO L226 Difference]: Without dead ends: 26264 [2021-03-10 21:26:25,049 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1579.2ms TimeCoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:26:25,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26264 states. [2021-03-10 21:26:25,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26264 to 26002. [2021-03-10 21:26:25,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26002 states, 26001 states have (on average 3.1706472827968155) internal successors, (82440), 26001 states have internal predecessors, (82440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:25,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26002 states to 26002 states and 82440 transitions. [2021-03-10 21:26:25,491 INFO L78 Accepts]: Start accepts. Automaton has 26002 states and 82440 transitions. Word has length 25 [2021-03-10 21:26:25,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:25,491 INFO L480 AbstractCegarLoop]: Abstraction has 26002 states and 82440 transitions. [2021-03-10 21:26:25,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:25,491 INFO L276 IsEmpty]: Start isEmpty. Operand 26002 states and 82440 transitions. [2021-03-10 21:26:25,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:26:25,525 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:25,525 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:25,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 486 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable877 [2021-03-10 21:26:25,726 INFO L428 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:25,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:25,726 INFO L82 PathProgramCache]: Analyzing trace with hash 880306103, now seen corresponding path program 483 times [2021-03-10 21:26:25,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:25,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437664474] [2021-03-10 21:26:25,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:25,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:26,357 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:26,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437664474] [2021-03-10 21:26:26,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957778347] [2021-03-10 21:26:26,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:26,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:26:26,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:26,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:26:26,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:27,241 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:27,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:27,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 22 [2021-03-10 21:26:27,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276869222] [2021-03-10 21:26:27,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:26:27,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:27,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:26:27,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:26:27,242 INFO L87 Difference]: Start difference. First operand 26002 states and 82440 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:28,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:28,556 INFO L93 Difference]: Finished difference Result 26167 states and 82719 transitions. [2021-03-10 21:26:28,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:26:28,558 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:26:28,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:28,597 INFO L225 Difference]: With dead ends: 26167 [2021-03-10 21:26:28,597 INFO L226 Difference]: Without dead ends: 26151 [2021-03-10 21:26:28,597 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1571.7ms TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:26:28,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26151 states. [2021-03-10 21:26:28,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26151 to 25962. [2021-03-10 21:26:29,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25962 states, 25961 states have (on average 3.170910211471053) internal successors, (82320), 25961 states have internal predecessors, (82320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:29,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25962 states to 25962 states and 82320 transitions. [2021-03-10 21:26:29,056 INFO L78 Accepts]: Start accepts. Automaton has 25962 states and 82320 transitions. Word has length 25 [2021-03-10 21:26:29,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:29,056 INFO L480 AbstractCegarLoop]: Abstraction has 25962 states and 82320 transitions. [2021-03-10 21:26:29,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:29,056 INFO L276 IsEmpty]: Start isEmpty. Operand 25962 states and 82320 transitions. [2021-03-10 21:26:29,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:26:29,088 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:29,088 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:29,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable880,487 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:29,288 INFO L428 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:29,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:29,289 INFO L82 PathProgramCache]: Analyzing trace with hash 659419775, now seen corresponding path program 484 times [2021-03-10 21:26:29,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:29,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863822403] [2021-03-10 21:26:29,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:29,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:29,919 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:29,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863822403] [2021-03-10 21:26:29,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299221260] [2021-03-10 21:26:29,920 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:29,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:26:29,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:29,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:26:29,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:30,793 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:30,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:30,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 23 [2021-03-10 21:26:30,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987307944] [2021-03-10 21:26:30,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:26:30,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:30,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:26:30,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:26:30,794 INFO L87 Difference]: Start difference. First operand 25962 states and 82320 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:32,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:32,198 INFO L93 Difference]: Finished difference Result 26771 states and 84501 transitions. [2021-03-10 21:26:32,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:26:32,201 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:26:32,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:32,249 INFO L225 Difference]: With dead ends: 26771 [2021-03-10 21:26:32,249 INFO L226 Difference]: Without dead ends: 26761 [2021-03-10 21:26:32,250 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1520.6ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:26:32,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26761 states. [2021-03-10 21:26:32,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26761 to 26195. [2021-03-10 21:26:32,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26195 states, 26194 states have (on average 3.1746964953806214) internal successors, (83158), 26194 states have internal predecessors, (83158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:32,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26195 states to 26195 states and 83158 transitions. [2021-03-10 21:26:32,678 INFO L78 Accepts]: Start accepts. Automaton has 26195 states and 83158 transitions. Word has length 25 [2021-03-10 21:26:32,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:32,678 INFO L480 AbstractCegarLoop]: Abstraction has 26195 states and 83158 transitions. [2021-03-10 21:26:32,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:32,678 INFO L276 IsEmpty]: Start isEmpty. Operand 26195 states and 83158 transitions. [2021-03-10 21:26:32,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:26:32,710 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:32,710 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:32,910 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 488 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable883 [2021-03-10 21:26:32,910 INFO L428 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:32,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:32,910 INFO L82 PathProgramCache]: Analyzing trace with hash -2020844797, now seen corresponding path program 485 times [2021-03-10 21:26:32,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:32,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955445851] [2021-03-10 21:26:32,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:32,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:33,558 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:33,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955445851] [2021-03-10 21:26:33,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114247794] [2021-03-10 21:26:33,558 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:26:33,579 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:26:33,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:33,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:26:33,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:34,424 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:34,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:34,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 23 [2021-03-10 21:26:34,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981751695] [2021-03-10 21:26:34,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:26:34,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:34,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:26:34,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:26:34,425 INFO L87 Difference]: Start difference. First operand 26195 states and 83158 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:35,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:35,727 INFO L93 Difference]: Finished difference Result 26752 states and 84431 transitions. [2021-03-10 21:26:35,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:26:35,729 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:26:35,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:35,768 INFO L225 Difference]: With dead ends: 26752 [2021-03-10 21:26:35,768 INFO L226 Difference]: Without dead ends: 26745 [2021-03-10 21:26:35,768 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1501.2ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:26:35,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26745 states. [2021-03-10 21:26:36,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26745 to 26191. [2021-03-10 21:26:36,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26191 states, 26190 states have (on average 3.174570446735395) internal successors, (83142), 26190 states have internal predecessors, (83142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:36,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26191 states to 26191 states and 83142 transitions. [2021-03-10 21:26:36,244 INFO L78 Accepts]: Start accepts. Automaton has 26191 states and 83142 transitions. Word has length 25 [2021-03-10 21:26:36,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:36,244 INFO L480 AbstractCegarLoop]: Abstraction has 26191 states and 83142 transitions. [2021-03-10 21:26:36,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:36,244 INFO L276 IsEmpty]: Start isEmpty. Operand 26191 states and 83142 transitions. [2021-03-10 21:26:36,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:26:36,277 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:36,277 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:36,477 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable886,489 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:36,477 INFO L428 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:36,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:36,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1230874581, now seen corresponding path program 486 times [2021-03-10 21:26:36,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:36,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139776948] [2021-03-10 21:26:36,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:36,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:37,062 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:37,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139776948] [2021-03-10 21:26:37,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72648878] [2021-03-10 21:26:37,062 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:37,084 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:26:37,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:37,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:26:37,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:37,985 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:37,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:37,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 22 [2021-03-10 21:26:37,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458787339] [2021-03-10 21:26:37,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:26:37,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:37,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:26:37,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:26:37,985 INFO L87 Difference]: Start difference. First operand 26191 states and 83142 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:39,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:39,570 INFO L93 Difference]: Finished difference Result 26690 states and 84238 transitions. [2021-03-10 21:26:39,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:26:39,572 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:26:39,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:39,614 INFO L225 Difference]: With dead ends: 26690 [2021-03-10 21:26:39,614 INFO L226 Difference]: Without dead ends: 26677 [2021-03-10 21:26:39,614 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1570.9ms TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:26:39,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26677 states. [2021-03-10 21:26:39,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26677 to 26188. [2021-03-10 21:26:39,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26188 states, 26187 states have (on average 3.1743613243212283) internal successors, (83127), 26187 states have internal predecessors, (83127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:40,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26188 states to 26188 states and 83127 transitions. [2021-03-10 21:26:40,025 INFO L78 Accepts]: Start accepts. Automaton has 26188 states and 83127 transitions. Word has length 25 [2021-03-10 21:26:40,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:40,025 INFO L480 AbstractCegarLoop]: Abstraction has 26188 states and 83127 transitions. [2021-03-10 21:26:40,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:40,025 INFO L276 IsEmpty]: Start isEmpty. Operand 26188 states and 83127 transitions. [2021-03-10 21:26:40,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:26:40,058 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:40,058 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:40,258 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable889 [2021-03-10 21:26:40,258 INFO L428 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:40,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:40,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1766104383, now seen corresponding path program 487 times [2021-03-10 21:26:40,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:40,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216425132] [2021-03-10 21:26:40,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:40,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:40,874 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:40,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216425132] [2021-03-10 21:26:40,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686249922] [2021-03-10 21:26:40,874 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:40,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:40,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:26:40,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:41,682 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:41,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:41,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 22 [2021-03-10 21:26:41,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538491085] [2021-03-10 21:26:41,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:26:41,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:41,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:26:41,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:26:41,683 INFO L87 Difference]: Start difference. First operand 26188 states and 83127 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:43,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:43,374 INFO L93 Difference]: Finished difference Result 26573 states and 83882 transitions. [2021-03-10 21:26:43,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:26:43,376 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:26:43,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:43,415 INFO L225 Difference]: With dead ends: 26573 [2021-03-10 21:26:43,416 INFO L226 Difference]: Without dead ends: 26557 [2021-03-10 21:26:43,416 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1531.2ms TimeCoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:26:43,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26557 states. [2021-03-10 21:26:43,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26557 to 26197. [2021-03-10 21:26:43,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26197 states, 26196 states have (on average 3.1737288135593222) internal successors, (83139), 26196 states have internal predecessors, (83139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:43,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26197 states to 26197 states and 83139 transitions. [2021-03-10 21:26:43,911 INFO L78 Accepts]: Start accepts. Automaton has 26197 states and 83139 transitions. Word has length 25 [2021-03-10 21:26:43,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:43,911 INFO L480 AbstractCegarLoop]: Abstraction has 26197 states and 83139 transitions. [2021-03-10 21:26:43,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:43,911 INFO L276 IsEmpty]: Start isEmpty. Operand 26197 states and 83139 transitions. [2021-03-10 21:26:43,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:26:43,945 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:43,945 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:44,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable892,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:44,146 INFO L428 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:44,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:44,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1178359061, now seen corresponding path program 488 times [2021-03-10 21:26:44,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:44,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390040752] [2021-03-10 21:26:44,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:44,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:44,822 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:44,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390040752] [2021-03-10 21:26:44,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990226204] [2021-03-10 21:26:44,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:26:44,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:26:44,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:44,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:26:44,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:45,686 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:45,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:45,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 22 [2021-03-10 21:26:45,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072626427] [2021-03-10 21:26:45,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:26:45,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:45,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:26:45,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:26:45,687 INFO L87 Difference]: Start difference. First operand 26197 states and 83139 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:47,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:47,364 INFO L93 Difference]: Finished difference Result 26468 states and 83627 transitions. [2021-03-10 21:26:47,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:26:47,367 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:26:47,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:47,408 INFO L225 Difference]: With dead ends: 26468 [2021-03-10 21:26:47,408 INFO L226 Difference]: Without dead ends: 26461 [2021-03-10 21:26:47,408 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1653.7ms TimeCoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:26:47,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26461 states. [2021-03-10 21:26:47,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26461 to 26194. [2021-03-10 21:26:47,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26194 states, 26193 states have (on average 3.1737487114878022) internal successors, (83130), 26193 states have internal predecessors, (83130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:47,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26194 states to 26194 states and 83130 transitions. [2021-03-10 21:26:47,819 INFO L78 Accepts]: Start accepts. Automaton has 26194 states and 83130 transitions. Word has length 25 [2021-03-10 21:26:47,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:47,819 INFO L480 AbstractCegarLoop]: Abstraction has 26194 states and 83130 transitions. [2021-03-10 21:26:47,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:47,819 INFO L276 IsEmpty]: Start isEmpty. Operand 26194 states and 83130 transitions. [2021-03-10 21:26:47,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:26:47,851 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:47,852 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:48,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 492 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable895 [2021-03-10 21:26:48,052 INFO L428 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:48,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:48,052 INFO L82 PathProgramCache]: Analyzing trace with hash -599983809, now seen corresponding path program 489 times [2021-03-10 21:26:48,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:48,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527825776] [2021-03-10 21:26:48,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:48,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:48,665 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:48,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527825776] [2021-03-10 21:26:48,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261535513] [2021-03-10 21:26:48,665 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 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 [2021-03-10 21:26:48,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:26:48,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:48,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:26:48,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:49,530 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:49,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:49,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 22 [2021-03-10 21:26:49,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035229034] [2021-03-10 21:26:49,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:26:49,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:49,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:26:49,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:26:49,531 INFO L87 Difference]: Start difference. First operand 26194 states and 83130 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:51,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:51,092 INFO L93 Difference]: Finished difference Result 26478 states and 83625 transitions. [2021-03-10 21:26:51,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:26:51,095 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:26:51,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:51,138 INFO L225 Difference]: With dead ends: 26478 [2021-03-10 21:26:51,138 INFO L226 Difference]: Without dead ends: 26462 [2021-03-10 21:26:51,138 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1554.6ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:26:51,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26462 states. [2021-03-10 21:26:51,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26462 to 26156. [2021-03-10 21:26:51,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26156 states, 26155 states have (on average 3.172968839610017) internal successors, (82989), 26155 states have internal predecessors, (82989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:51,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26156 states to 26156 states and 82989 transitions. [2021-03-10 21:26:51,646 INFO L78 Accepts]: Start accepts. Automaton has 26156 states and 82989 transitions. Word has length 25 [2021-03-10 21:26:51,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:51,646 INFO L480 AbstractCegarLoop]: Abstraction has 26156 states and 82989 transitions. [2021-03-10 21:26:51,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:51,646 INFO L276 IsEmpty]: Start isEmpty. Operand 26156 states and 82989 transitions. [2021-03-10 21:26:51,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:26:51,682 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:51,682 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:51,882 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable898,493 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:51,882 INFO L428 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:51,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:51,882 INFO L82 PathProgramCache]: Analyzing trace with hash -301930851, now seen corresponding path program 490 times [2021-03-10 21:26:51,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:51,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685342255] [2021-03-10 21:26:51,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:51,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:52,537 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:52,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685342255] [2021-03-10 21:26:52,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063108204] [2021-03-10 21:26:52,537 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:52,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:26:52,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:52,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:26:52,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:53,405 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:53,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:53,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 22 [2021-03-10 21:26:53,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439457015] [2021-03-10 21:26:53,405 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:26:53,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:53,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:26:53,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:26:53,406 INFO L87 Difference]: Start difference. First operand 26156 states and 82989 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:54,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:54,976 INFO L93 Difference]: Finished difference Result 26350 states and 83325 transitions. [2021-03-10 21:26:54,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:26:54,979 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:26:54,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:55,021 INFO L225 Difference]: With dead ends: 26350 [2021-03-10 21:26:55,021 INFO L226 Difference]: Without dead ends: 26331 [2021-03-10 21:26:55,021 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1644.3ms TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:26:55,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26331 states. [2021-03-10 21:26:55,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26331 to 26122. [2021-03-10 21:26:55,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26122 states, 26121 states have (on average 3.173193981853681) internal successors, (82887), 26121 states have internal predecessors, (82887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:55,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26122 states to 26122 states and 82887 transitions. [2021-03-10 21:26:55,457 INFO L78 Accepts]: Start accepts. Automaton has 26122 states and 82887 transitions. Word has length 25 [2021-03-10 21:26:55,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:55,457 INFO L480 AbstractCegarLoop]: Abstraction has 26122 states and 82887 transitions. [2021-03-10 21:26:55,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:55,457 INFO L276 IsEmpty]: Start isEmpty. Operand 26122 states and 82887 transitions. [2021-03-10 21:26:55,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:26:55,490 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:55,490 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:55,690 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable901,494 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:55,690 INFO L428 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:55,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:55,690 INFO L82 PathProgramCache]: Analyzing trace with hash 869072767, now seen corresponding path program 491 times [2021-03-10 21:26:55,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:55,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235266634] [2021-03-10 21:26:55,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:55,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:56,337 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:56,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235266634] [2021-03-10 21:26:56,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218195286] [2021-03-10 21:26:56,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:56,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:26:56,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:56,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:26:56,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:57,151 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:57,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:57,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 23 [2021-03-10 21:26:57,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435891312] [2021-03-10 21:26:57,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:26:57,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:57,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:26:57,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:26:57,152 INFO L87 Difference]: Start difference. First operand 26122 states and 82887 transitions. Second operand has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:58,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:58,655 INFO L93 Difference]: Finished difference Result 26878 states and 84798 transitions. [2021-03-10 21:26:58,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:26:58,657 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:26:58,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:58,699 INFO L225 Difference]: With dead ends: 26878 [2021-03-10 21:26:58,699 INFO L226 Difference]: Without dead ends: 26868 [2021-03-10 21:26:58,699 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1475.9ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:26:58,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26868 states. [2021-03-10 21:26:59,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26868 to 26338. [2021-03-10 21:26:59,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26338 states, 26337 states have (on average 3.1761780005315714) internal successors, (83651), 26337 states have internal predecessors, (83651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:59,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26338 states to 26338 states and 83651 transitions. [2021-03-10 21:26:59,233 INFO L78 Accepts]: Start accepts. Automaton has 26338 states and 83651 transitions. Word has length 25 [2021-03-10 21:26:59,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:59,233 INFO L480 AbstractCegarLoop]: Abstraction has 26338 states and 83651 transitions. [2021-03-10 21:26:59,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:59,233 INFO L276 IsEmpty]: Start isEmpty. Operand 26338 states and 83651 transitions. [2021-03-10 21:26:59,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:26:59,268 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:59,268 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:59,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable904,495 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:59,468 INFO L428 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:59,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:59,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1811191805, now seen corresponding path program 492 times [2021-03-10 21:26:59,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:59,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838836925] [2021-03-10 21:26:59,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:59,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:00,153 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:00,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838836925] [2021-03-10 21:27:00,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096841581] [2021-03-10 21:27:00,153 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 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 [2021-03-10 21:27:00,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:27:00,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:00,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:27:00,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:01,020 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:01,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:01,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 23 [2021-03-10 21:27:01,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796922131] [2021-03-10 21:27:01,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:27:01,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:01,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:27:01,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:27:01,021 INFO L87 Difference]: Start difference. First operand 26338 states and 83651 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:02,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:02,551 INFO L93 Difference]: Finished difference Result 26859 states and 84730 transitions. [2021-03-10 21:27:02,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:27:02,554 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:27:02,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:02,594 INFO L225 Difference]: With dead ends: 26859 [2021-03-10 21:27:02,594 INFO L226 Difference]: Without dead ends: 26852 [2021-03-10 21:27:02,595 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1536.9ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:27:02,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26852 states. [2021-03-10 21:27:02,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26852 to 26333. [2021-03-10 21:27:02,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26333 states, 26332 states have (on average 3.1760215707124413) internal successors, (83631), 26332 states have internal predecessors, (83631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:03,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26333 states to 26333 states and 83631 transitions. [2021-03-10 21:27:03,009 INFO L78 Accepts]: Start accepts. Automaton has 26333 states and 83631 transitions. Word has length 25 [2021-03-10 21:27:03,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:03,010 INFO L480 AbstractCegarLoop]: Abstraction has 26333 states and 83631 transitions. [2021-03-10 21:27:03,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:03,010 INFO L276 IsEmpty]: Start isEmpty. Operand 26333 states and 83631 transitions. [2021-03-10 21:27:03,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:27:03,042 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:03,043 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:03,243 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable907,496 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:03,243 INFO L428 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:03,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:03,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1440527573, now seen corresponding path program 493 times [2021-03-10 21:27:03,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:03,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094848407] [2021-03-10 21:27:03,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:03,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:03,852 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:03,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094848407] [2021-03-10 21:27:03,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052006432] [2021-03-10 21:27:03,852 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:03,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:03,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:27:03,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:04,683 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:04,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:04,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 22 [2021-03-10 21:27:04,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751393444] [2021-03-10 21:27:04,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:27:04,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:04,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:27:04,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:27:04,684 INFO L87 Difference]: Start difference. First operand 26333 states and 83631 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 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) [2021-03-10 21:27:06,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:06,480 INFO L93 Difference]: Finished difference Result 26840 states and 84655 transitions. [2021-03-10 21:27:06,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:27:06,483 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 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 25 [2021-03-10 21:27:06,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:06,522 INFO L225 Difference]: With dead ends: 26840 [2021-03-10 21:27:06,522 INFO L226 Difference]: Without dead ends: 26827 [2021-03-10 21:27:06,522 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1519.7ms TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:27:06,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26827 states. [2021-03-10 21:27:06,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26827 to 26329. [2021-03-10 21:27:06,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26329 states, 26328 states have (on average 3.175820419325433) internal successors, (83613), 26328 states have internal predecessors, (83613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:07,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26329 states to 26329 states and 83613 transitions. [2021-03-10 21:27:07,002 INFO L78 Accepts]: Start accepts. Automaton has 26329 states and 83613 transitions. Word has length 25 [2021-03-10 21:27:07,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:07,002 INFO L480 AbstractCegarLoop]: Abstraction has 26329 states and 83613 transitions. [2021-03-10 21:27:07,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 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) [2021-03-10 21:27:07,002 INFO L276 IsEmpty]: Start isEmpty. Operand 26329 states and 83613 transitions. [2021-03-10 21:27:07,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:27:07,035 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:07,035 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:07,235 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable910 [2021-03-10 21:27:07,235 INFO L428 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:07,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:07,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1975757375, now seen corresponding path program 494 times [2021-03-10 21:27:07,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:07,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109451921] [2021-03-10 21:27:07,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:07,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:07,856 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:07,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109451921] [2021-03-10 21:27:07,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753809283] [2021-03-10 21:27:07,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:27:07,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:27:07,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:07,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:27:07,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:08,669 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:08,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:08,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 22 [2021-03-10 21:27:08,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863451760] [2021-03-10 21:27:08,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:27:08,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:08,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:27:08,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:27:08,670 INFO L87 Difference]: Start difference. First operand 26329 states and 83613 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 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) [2021-03-10 21:27:10,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:10,533 INFO L93 Difference]: Finished difference Result 26818 states and 84533 transitions. [2021-03-10 21:27:10,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:27:10,536 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 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 25 [2021-03-10 21:27:10,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:10,576 INFO L225 Difference]: With dead ends: 26818 [2021-03-10 21:27:10,576 INFO L226 Difference]: Without dead ends: 26802 [2021-03-10 21:27:10,576 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1583.2ms TimeCoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:27:10,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26802 states. [2021-03-10 21:27:10,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26802 to 26325. [2021-03-10 21:27:10,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26325 states, 26324 states have (on average 3.175657194955174) internal successors, (83596), 26324 states have internal predecessors, (83596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:10,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26325 states to 26325 states and 83596 transitions. [2021-03-10 21:27:10,987 INFO L78 Accepts]: Start accepts. Automaton has 26325 states and 83596 transitions. Word has length 25 [2021-03-10 21:27:10,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:10,987 INFO L480 AbstractCegarLoop]: Abstraction has 26325 states and 83596 transitions. [2021-03-10 21:27:10,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 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) [2021-03-10 21:27:10,987 INFO L276 IsEmpty]: Start isEmpty. Operand 26325 states and 83596 transitions. [2021-03-10 21:27:11,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:27:11,019 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:11,019 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:11,219 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable913,498 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:11,220 INFO L428 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:11,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:11,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1388012053, now seen corresponding path program 495 times [2021-03-10 21:27:11,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:11,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483146126] [2021-03-10 21:27:11,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:11,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:11,886 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:11,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483146126] [2021-03-10 21:27:11,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643386930] [2021-03-10 21:27:11,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:11,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:27:11,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:11,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:27:11,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:12,800 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:12,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:12,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 22 [2021-03-10 21:27:12,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217709312] [2021-03-10 21:27:12,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:27:12,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:12,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:27:12,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:27:12,801 INFO L87 Difference]: Start difference. First operand 26325 states and 83596 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 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) [2021-03-10 21:27:14,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:14,781 INFO L93 Difference]: Finished difference Result 26741 states and 84363 transitions. [2021-03-10 21:27:14,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:27:14,784 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 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 25 [2021-03-10 21:27:14,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:14,823 INFO L225 Difference]: With dead ends: 26741 [2021-03-10 21:27:14,823 INFO L226 Difference]: Without dead ends: 26722 [2021-03-10 21:27:14,824 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1788.4ms TimeCoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:27:14,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26722 states. [2021-03-10 21:27:15,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26722 to 26330. [2021-03-10 21:27:15,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26330 states, 26329 states have (on average 3.1751300846974817) internal successors, (83598), 26329 states have internal predecessors, (83598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:15,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26330 states to 26330 states and 83598 transitions. [2021-03-10 21:27:15,305 INFO L78 Accepts]: Start accepts. Automaton has 26330 states and 83598 transitions. Word has length 25 [2021-03-10 21:27:15,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:15,305 INFO L480 AbstractCegarLoop]: Abstraction has 26330 states and 83598 transitions. [2021-03-10 21:27:15,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 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) [2021-03-10 21:27:15,305 INFO L276 IsEmpty]: Start isEmpty. Operand 26330 states and 83598 transitions. [2021-03-10 21:27:15,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:27:15,339 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:15,339 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:15,539 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable916,499 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:15,539 INFO L428 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:15,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:15,539 INFO L82 PathProgramCache]: Analyzing trace with hash 347776255, now seen corresponding path program 496 times [2021-03-10 21:27:15,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:15,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487261261] [2021-03-10 21:27:15,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:15,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:16,238 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:16,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487261261] [2021-03-10 21:27:16,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155777890] [2021-03-10 21:27:16,239 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:16,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:27:16,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:16,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:27:16,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:17,060 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:17,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:17,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 22 [2021-03-10 21:27:17,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640748351] [2021-03-10 21:27:17,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:27:17,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:17,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:27:17,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:27:17,061 INFO L87 Difference]: Start difference. First operand 26330 states and 83598 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 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) [2021-03-10 21:27:18,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:18,875 INFO L93 Difference]: Finished difference Result 26637 states and 84135 transitions. [2021-03-10 21:27:18,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:27:18,879 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 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 25 [2021-03-10 21:27:18,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:18,920 INFO L225 Difference]: With dead ends: 26637 [2021-03-10 21:27:18,921 INFO L226 Difference]: Without dead ends: 26630 [2021-03-10 21:27:18,921 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1719.1ms TimeCoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:27:18,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26630 states. [2021-03-10 21:27:19,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26630 to 26326. [2021-03-10 21:27:19,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26326 states, 26325 states have (on average 3.175156695156695) internal successors, (83586), 26325 states have internal predecessors, (83586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:19,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26326 states to 26326 states and 83586 transitions. [2021-03-10 21:27:19,382 INFO L78 Accepts]: Start accepts. Automaton has 26326 states and 83586 transitions. Word has length 25 [2021-03-10 21:27:19,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:19,382 INFO L480 AbstractCegarLoop]: Abstraction has 26326 states and 83586 transitions. [2021-03-10 21:27:19,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 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) [2021-03-10 21:27:19,382 INFO L276 IsEmpty]: Start isEmpty. Operand 26326 states and 83586 transitions. [2021-03-10 21:27:19,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:27:19,419 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:19,419 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:19,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable919 [2021-03-10 21:27:19,619 INFO L428 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:19,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:19,620 INFO L82 PathProgramCache]: Analyzing trace with hash 755669175, now seen corresponding path program 497 times [2021-03-10 21:27:19,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:19,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058802768] [2021-03-10 21:27:19,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:19,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:20,346 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:20,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058802768] [2021-03-10 21:27:20,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802099553] [2021-03-10 21:27:20,347 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:20,367 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:27:20,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:20,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:27:20,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:21,369 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:21,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:21,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 22 [2021-03-10 21:27:21,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936097184] [2021-03-10 21:27:21,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:27:21,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:21,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:27:21,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:27:21,370 INFO L87 Difference]: Start difference. First operand 26326 states and 83586 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:22,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:22,739 INFO L93 Difference]: Finished difference Result 26655 states and 84164 transitions. [2021-03-10 21:27:22,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:27:22,742 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:27:22,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:22,781 INFO L225 Difference]: With dead ends: 26655 [2021-03-10 21:27:22,781 INFO L226 Difference]: Without dead ends: 26639 [2021-03-10 21:27:22,781 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1798.3ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:27:22,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26639 states. [2021-03-10 21:27:23,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26639 to 26300. [2021-03-10 21:27:23,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26300 states, 26299 states have (on average 3.1746073995208945) internal successors, (83489), 26299 states have internal predecessors, (83489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:23,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26300 states to 26300 states and 83489 transitions. [2021-03-10 21:27:23,251 INFO L78 Accepts]: Start accepts. Automaton has 26300 states and 83489 transitions. Word has length 25 [2021-03-10 21:27:23,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:23,251 INFO L480 AbstractCegarLoop]: Abstraction has 26300 states and 83489 transitions. [2021-03-10 21:27:23,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:23,251 INFO L276 IsEmpty]: Start isEmpty. Operand 26300 states and 83489 transitions. [2021-03-10 21:27:23,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:27:23,285 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:23,285 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:23,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable922,501 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:23,485 INFO L428 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:23,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:23,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1053722133, now seen corresponding path program 498 times [2021-03-10 21:27:23,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:23,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022228876] [2021-03-10 21:27:23,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:23,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:24,130 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:24,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022228876] [2021-03-10 21:27:24,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552814547] [2021-03-10 21:27:24,131 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:24,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:27:24,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:24,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:27:24,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:25,026 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:25,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:25,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 22 [2021-03-10 21:27:25,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414034843] [2021-03-10 21:27:25,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:27:25,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:25,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:27:25,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:27:25,027 INFO L87 Difference]: Start difference. First operand 26300 states and 83489 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:26,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:26,549 INFO L93 Difference]: Finished difference Result 26683 states and 84164 transitions. [2021-03-10 21:27:26,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:27:26,553 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:27:26,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:26,595 INFO L225 Difference]: With dead ends: 26683 [2021-03-10 21:27:26,595 INFO L226 Difference]: Without dead ends: 26664 [2021-03-10 21:27:26,595 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1688.1ms TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:27:26,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26664 states. [2021-03-10 21:27:26,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26664 to 26276. [2021-03-10 21:27:26,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26276 states, 26275 states have (on average 3.1743482397716463) internal successors, (83406), 26275 states have internal predecessors, (83406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:27,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26276 states to 26276 states and 83406 transitions. [2021-03-10 21:27:27,032 INFO L78 Accepts]: Start accepts. Automaton has 26276 states and 83406 transitions. Word has length 25 [2021-03-10 21:27:27,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:27,033 INFO L480 AbstractCegarLoop]: Abstraction has 26276 states and 83406 transitions. [2021-03-10 21:27:27,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:27,033 INFO L276 IsEmpty]: Start isEmpty. Operand 26276 states and 83406 transitions. [2021-03-10 21:27:27,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:27:27,067 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:27,067 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:27,267 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable925 [2021-03-10 21:27:27,267 INFO L428 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:27,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:27,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1703429239, now seen corresponding path program 499 times [2021-03-10 21:27:27,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:27,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267479777] [2021-03-10 21:27:27,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:27,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:27,977 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:27,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267479777] [2021-03-10 21:27:27,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388444980] [2021-03-10 21:27:27,977 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:27,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:27,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:27:27,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:28,782 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:28,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:28,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 22 [2021-03-10 21:27:28,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232630781] [2021-03-10 21:27:28,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:27:28,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:28,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:27:28,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:27:28,783 INFO L87 Difference]: Start difference. First operand 26276 states and 83406 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 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) [2021-03-10 21:27:30,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:30,619 INFO L93 Difference]: Finished difference Result 26515 states and 83825 transitions. [2021-03-10 21:27:30,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:27:30,622 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 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 25 [2021-03-10 21:27:30,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:30,661 INFO L225 Difference]: With dead ends: 26515 [2021-03-10 21:27:30,661 INFO L226 Difference]: Without dead ends: 26493 [2021-03-10 21:27:30,661 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1729.6ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:27:30,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26493 states. [2021-03-10 21:27:31,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26493 to 26252. [2021-03-10 21:27:31,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26252 states, 26251 states have (on average 3.174507637804274) internal successors, (83334), 26251 states have internal predecessors, (83334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:31,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26252 states to 26252 states and 83334 transitions. [2021-03-10 21:27:31,151 INFO L78 Accepts]: Start accepts. Automaton has 26252 states and 83334 transitions. Word has length 25 [2021-03-10 21:27:31,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:31,152 INFO L480 AbstractCegarLoop]: Abstraction has 26252 states and 83334 transitions. [2021-03-10 21:27:31,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 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) [2021-03-10 21:27:31,152 INFO L276 IsEmpty]: Start isEmpty. Operand 26252 states and 83334 transitions. [2021-03-10 21:27:31,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:27:31,186 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:31,186 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:31,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable928,503 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:31,386 INFO L428 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:31,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:31,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1221619073, now seen corresponding path program 500 times [2021-03-10 21:27:31,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:31,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968774050] [2021-03-10 21:27:31,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:31,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:32,086 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:32,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968774050] [2021-03-10 21:27:32,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254758426] [2021-03-10 21:27:32,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:32,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:27:32,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:32,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:27:32,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:32,905 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:32,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:32,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 23 [2021-03-10 21:27:32,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773586942] [2021-03-10 21:27:32,906 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:27:32,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:32,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:27:32,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:27:32,906 INFO L87 Difference]: Start difference. First operand 26252 states and 83334 transitions. Second operand has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:34,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:34,542 INFO L93 Difference]: Finished difference Result 27031 states and 85190 transitions. [2021-03-10 21:27:34,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:27:34,546 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:27:34,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:34,590 INFO L225 Difference]: With dead ends: 27031 [2021-03-10 21:27:34,590 INFO L226 Difference]: Without dead ends: 27021 [2021-03-10 21:27:34,591 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1533.4ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:27:34,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27021 states. [2021-03-10 21:27:34,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27021 to 26424. [2021-03-10 21:27:34,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26424 states, 26423 states have (on average 3.1765885781326872) internal successors, (83935), 26423 states have internal predecessors, (83935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:35,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26424 states to 26424 states and 83935 transitions. [2021-03-10 21:27:35,015 INFO L78 Accepts]: Start accepts. Automaton has 26424 states and 83935 transitions. Word has length 25 [2021-03-10 21:27:35,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:35,015 INFO L480 AbstractCegarLoop]: Abstraction has 26424 states and 83935 transitions. [2021-03-10 21:27:35,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:35,015 INFO L276 IsEmpty]: Start isEmpty. Operand 26424 states and 83935 transitions. [2021-03-10 21:27:35,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:27:35,049 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:35,049 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:35,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable931,504 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:35,249 INFO L428 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:35,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:35,249 INFO L82 PathProgramCache]: Analyzing trace with hash 393083651, now seen corresponding path program 501 times [2021-03-10 21:27:35,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:35,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452355650] [2021-03-10 21:27:35,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:35,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:35,927 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:35,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452355650] [2021-03-10 21:27:35,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324208735] [2021-03-10 21:27:35,928 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 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 [2021-03-10 21:27:35,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:27:35,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:35,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:27:35,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:36,716 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:36,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:36,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 23 [2021-03-10 21:27:36,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67368970] [2021-03-10 21:27:36,717 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:27:36,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:36,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:27:36,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:27:36,717 INFO L87 Difference]: Start difference. First operand 26424 states and 83935 transitions. Second operand has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:38,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:38,377 INFO L93 Difference]: Finished difference Result 27015 states and 85143 transitions. [2021-03-10 21:27:38,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:27:38,379 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:27:38,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:38,419 INFO L225 Difference]: With dead ends: 27015 [2021-03-10 21:27:38,419 INFO L226 Difference]: Without dead ends: 27008 [2021-03-10 21:27:38,419 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1483.5ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:27:38,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27008 states. [2021-03-10 21:27:38,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27008 to 26408. [2021-03-10 21:27:38,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26408 states, 26407 states have (on average 3.176506229408869) internal successors, (83882), 26407 states have internal predecessors, (83882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:38,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26408 states to 26408 states and 83882 transitions. [2021-03-10 21:27:38,902 INFO L78 Accepts]: Start accepts. Automaton has 26408 states and 83882 transitions. Word has length 25 [2021-03-10 21:27:38,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:38,902 INFO L480 AbstractCegarLoop]: Abstraction has 26408 states and 83882 transitions. [2021-03-10 21:27:38,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:38,902 INFO L276 IsEmpty]: Start isEmpty. Operand 26408 states and 83882 transitions. [2021-03-10 21:27:38,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:27:38,935 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:38,935 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:39,136 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 505 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable934 [2021-03-10 21:27:39,136 INFO L428 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:39,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:39,136 INFO L82 PathProgramCache]: Analyzing trace with hash -650164267, now seen corresponding path program 502 times [2021-03-10 21:27:39,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:39,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517610913] [2021-03-10 21:27:39,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:39,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:39,755 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:39,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517610913] [2021-03-10 21:27:39,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173217382] [2021-03-10 21:27:39,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:39,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:27:39,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:39,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:27:39,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:40,560 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:40,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:40,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-03-10 21:27:40,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566966209] [2021-03-10 21:27:40,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:27:40,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:40,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:27:40,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:27:40,561 INFO L87 Difference]: Start difference. First operand 26408 states and 83882 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:42,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:42,351 INFO L93 Difference]: Finished difference Result 27006 states and 85093 transitions. [2021-03-10 21:27:42,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:27:42,355 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:27:42,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:42,398 INFO L225 Difference]: With dead ends: 27006 [2021-03-10 21:27:42,398 INFO L226 Difference]: Without dead ends: 26993 [2021-03-10 21:27:42,398 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1507.6ms TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:27:42,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26993 states. [2021-03-10 21:27:42,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26993 to 26403. [2021-03-10 21:27:42,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26403 states, 26402 states have (on average 3.176312400575714) internal successors, (83861), 26402 states have internal predecessors, (83861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:42,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26403 states to 26403 states and 83861 transitions. [2021-03-10 21:27:42,832 INFO L78 Accepts]: Start accepts. Automaton has 26403 states and 83861 transitions. Word has length 25 [2021-03-10 21:27:42,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:42,832 INFO L480 AbstractCegarLoop]: Abstraction has 26403 states and 83861 transitions. [2021-03-10 21:27:42,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:42,832 INFO L276 IsEmpty]: Start isEmpty. Operand 26403 states and 83861 transitions. [2021-03-10 21:27:42,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:27:42,865 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:42,865 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:43,065 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable937,506 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:43,065 INFO L428 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:43,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:43,066 INFO L82 PathProgramCache]: Analyzing trace with hash -114934465, now seen corresponding path program 503 times [2021-03-10 21:27:43,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:43,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659736729] [2021-03-10 21:27:43,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:43,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:43,740 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:43,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659736729] [2021-03-10 21:27:43,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293900509] [2021-03-10 21:27:43,741 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:43,762 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:27:43,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:43,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:27:43,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:44,546 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:44,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:44,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-03-10 21:27:44,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396400932] [2021-03-10 21:27:44,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:27:44,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:44,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:27:44,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:27:44,546 INFO L87 Difference]: Start difference. First operand 26403 states and 83861 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:46,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:46,493 INFO L93 Difference]: Finished difference Result 27006 states and 85046 transitions. [2021-03-10 21:27:46,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:27:46,496 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:27:46,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:46,537 INFO L225 Difference]: With dead ends: 27006 [2021-03-10 21:27:46,538 INFO L226 Difference]: Without dead ends: 26990 [2021-03-10 21:27:46,538 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1627.4ms TimeCoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:27:46,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26990 states. [2021-03-10 21:27:46,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26990 to 26398. [2021-03-10 21:27:46,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26398 states, 26397 states have (on average 3.176156381406978) internal successors, (83841), 26397 states have internal predecessors, (83841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:47,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26398 states to 26398 states and 83841 transitions. [2021-03-10 21:27:47,030 INFO L78 Accepts]: Start accepts. Automaton has 26398 states and 83841 transitions. Word has length 25 [2021-03-10 21:27:47,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:47,030 INFO L480 AbstractCegarLoop]: Abstraction has 26398 states and 83841 transitions. [2021-03-10 21:27:47,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:47,030 INFO L276 IsEmpty]: Start isEmpty. Operand 26398 states and 83841 transitions. [2021-03-10 21:27:47,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:27:47,063 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:47,063 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:47,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 507 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable940 [2021-03-10 21:27:47,263 INFO L428 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:47,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:47,264 INFO L82 PathProgramCache]: Analyzing trace with hash -702679787, now seen corresponding path program 504 times [2021-03-10 21:27:47,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:47,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722055843] [2021-03-10 21:27:47,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:47,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:47,927 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:47,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722055843] [2021-03-10 21:27:47,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818142128] [2021-03-10 21:27:47,927 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:47,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:27:47,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:47,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:27:47,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:48,737 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:48,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:48,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-03-10 21:27:48,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47978918] [2021-03-10 21:27:48,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:27:48,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:48,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:27:48,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:27:48,737 INFO L87 Difference]: Start difference. First operand 26398 states and 83841 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:50,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:50,802 INFO L93 Difference]: Finished difference Result 27010 states and 85005 transitions. [2021-03-10 21:27:50,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:27:50,804 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:27:50,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:50,845 INFO L225 Difference]: With dead ends: 27010 [2021-03-10 21:27:50,845 INFO L226 Difference]: Without dead ends: 26991 [2021-03-10 21:27:50,845 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1718.1ms TimeCoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:27:50,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26991 states. [2021-03-10 21:27:51,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26991 to 26393. [2021-03-10 21:27:51,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26393 states, 26392 states have (on average 3.176038193391937) internal successors, (83822), 26392 states have internal predecessors, (83822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:51,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26393 states to 26393 states and 83822 transitions. [2021-03-10 21:27:51,274 INFO L78 Accepts]: Start accepts. Automaton has 26393 states and 83822 transitions. Word has length 25 [2021-03-10 21:27:51,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:51,275 INFO L480 AbstractCegarLoop]: Abstraction has 26393 states and 83822 transitions. [2021-03-10 21:27:51,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:51,275 INFO L276 IsEmpty]: Start isEmpty. Operand 26393 states and 83822 transitions. [2021-03-10 21:27:51,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:27:51,308 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:51,308 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:51,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable943,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:51,508 INFO L428 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:51,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:51,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1742915585, now seen corresponding path program 505 times [2021-03-10 21:27:51,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:51,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089011099] [2021-03-10 21:27:51,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:51,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:52,197 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:52,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089011099] [2021-03-10 21:27:52,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406433612] [2021-03-10 21:27:52,197 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:52,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:52,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:27:52,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:52,933 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:52,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:52,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-03-10 21:27:52,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306925373] [2021-03-10 21:27:52,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:27:52,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:52,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:27:52,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:27:52,934 INFO L87 Difference]: Start difference. First operand 26393 states and 83822 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:55,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:55,108 INFO L93 Difference]: Finished difference Result 26898 states and 84763 transitions. [2021-03-10 21:27:55,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:27:55,111 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:27:55,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:55,150 INFO L225 Difference]: With dead ends: 26898 [2021-03-10 21:27:55,150 INFO L226 Difference]: Without dead ends: 26876 [2021-03-10 21:27:55,151 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1745.6ms TimeCoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:27:55,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26876 states. [2021-03-10 21:27:55,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26876 to 26388. [2021-03-10 21:27:55,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26388 states, 26387 states have (on average 3.175957858036154) internal successors, (83804), 26387 states have internal predecessors, (83804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:55,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26388 states to 26388 states and 83804 transitions. [2021-03-10 21:27:55,642 INFO L78 Accepts]: Start accepts. Automaton has 26388 states and 83804 transitions. Word has length 25 [2021-03-10 21:27:55,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:55,642 INFO L480 AbstractCegarLoop]: Abstraction has 26388 states and 83804 transitions. [2021-03-10 21:27:55,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:55,642 INFO L276 IsEmpty]: Start isEmpty. Operand 26388 states and 83804 transitions. [2021-03-10 21:27:55,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:27:55,675 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:55,675 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:55,876 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 509 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable946 [2021-03-10 21:27:55,876 INFO L428 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:55,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:55,876 INFO L82 PathProgramCache]: Analyzing trace with hash 369513045, now seen corresponding path program 506 times [2021-03-10 21:27:55,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:55,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479740286] [2021-03-10 21:27:55,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:55,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:56,601 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:56,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479740286] [2021-03-10 21:27:56,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646657738] [2021-03-10 21:27:56,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:56,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:27:56,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:56,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-03-10 21:27:56,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:57,446 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:57,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:57,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-03-10 21:27:57,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444436863] [2021-03-10 21:27:57,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:27:57,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:57,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:27:57,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:27:57,447 INFO L87 Difference]: Start difference. First operand 26388 states and 83804 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:59,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:59,750 INFO L93 Difference]: Finished difference Result 26777 states and 84498 transitions. [2021-03-10 21:27:59,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:27:59,754 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:27:59,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:59,796 INFO L225 Difference]: With dead ends: 26777 [2021-03-10 21:27:59,797 INFO L226 Difference]: Without dead ends: 26770 [2021-03-10 21:27:59,797 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1865.8ms TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:27:59,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26770 states. [2021-03-10 21:28:00,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26770 to 26383. [2021-03-10 21:28:00,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26383 states, 26382 states have (on average 3.1759912061253885) internal successors, (83789), 26382 states have internal predecessors, (83789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:00,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26383 states to 26383 states and 83789 transitions. [2021-03-10 21:28:00,226 INFO L78 Accepts]: Start accepts. Automaton has 26383 states and 83789 transitions. Word has length 25 [2021-03-10 21:28:00,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:00,227 INFO L480 AbstractCegarLoop]: Abstraction has 26383 states and 83789 transitions. [2021-03-10 21:28:00,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:00,227 INFO L276 IsEmpty]: Start isEmpty. Operand 26383 states and 83789 transitions. [2021-03-10 21:28:00,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 21:28:00,261 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:00,261 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:00,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable949,510 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:00,461 INFO L428 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:00,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:00,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1225505269, now seen corresponding path program 507 times [2021-03-10 21:28:00,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:00,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871310692] [2021-03-10 21:28:00,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:00,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:00,767 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:00,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871310692] [2021-03-10 21:28:00,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868707551] [2021-03-10 21:28:00,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:00,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:28:00,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:00,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:28:00,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:01,384 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:01,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:01,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2021-03-10 21:28:01,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907714177] [2021-03-10 21:28:01,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:28:01,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:01,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:28:01,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:28:01,385 INFO L87 Difference]: Start difference. First operand 26383 states and 83789 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:02,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:02,168 INFO L93 Difference]: Finished difference Result 34009 states and 106082 transitions. [2021-03-10 21:28:02,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:28:02,172 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 21:28:02,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:02,225 INFO L225 Difference]: With dead ends: 34009 [2021-03-10 21:28:02,225 INFO L226 Difference]: Without dead ends: 33983 [2021-03-10 21:28:02,225 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1079.4ms TimeCoverageRelationStatistics Valid=386, Invalid=1174, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 21:28:02,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33983 states. [2021-03-10 21:28:02,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33983 to 26378. [2021-03-10 21:28:02,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26378 states, 26377 states have (on average 3.1762141259430563) internal successors, (83779), 26377 states have internal predecessors, (83779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:02,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26378 states to 26378 states and 83779 transitions. [2021-03-10 21:28:02,786 INFO L78 Accepts]: Start accepts. Automaton has 26378 states and 83779 transitions. Word has length 26 [2021-03-10 21:28:02,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:02,786 INFO L480 AbstractCegarLoop]: Abstraction has 26378 states and 83779 transitions. [2021-03-10 21:28:02,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:02,786 INFO L276 IsEmpty]: Start isEmpty. Operand 26378 states and 83779 transitions. [2021-03-10 21:28:02,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 21:28:02,819 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:02,819 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:03,019 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable952,511 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:03,019 INFO L428 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:03,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:03,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1488462363, now seen corresponding path program 508 times [2021-03-10 21:28:03,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:03,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918582599] [2021-03-10 21:28:03,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:03,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:03,325 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:03,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918582599] [2021-03-10 21:28:03,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408952621] [2021-03-10 21:28:03,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:03,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:28:03,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:03,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:28:03,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:03,862 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:03,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:03,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2021-03-10 21:28:03,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542362978] [2021-03-10 21:28:03,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:28:03,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:03,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:28:03,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:28:03,862 INFO L87 Difference]: Start difference. First operand 26378 states and 83779 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:04,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:04,634 INFO L93 Difference]: Finished difference Result 34313 states and 106998 transitions. [2021-03-10 21:28:04,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:28:04,638 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 21:28:04,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:04,697 INFO L225 Difference]: With dead ends: 34313 [2021-03-10 21:28:04,697 INFO L226 Difference]: Without dead ends: 34313 [2021-03-10 21:28:04,697 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 795.1ms TimeCoverageRelationStatistics Valid=307, Invalid=685, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:28:04,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34313 states. [2021-03-10 21:28:05,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34313 to 26571. [2021-03-10 21:28:05,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26571 states, 26570 states have (on average 3.174934136243884) internal successors, (84358), 26570 states have internal predecessors, (84358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:05,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26571 states to 26571 states and 84358 transitions. [2021-03-10 21:28:05,250 INFO L78 Accepts]: Start accepts. Automaton has 26571 states and 84358 transitions. Word has length 26 [2021-03-10 21:28:05,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:05,250 INFO L480 AbstractCegarLoop]: Abstraction has 26571 states and 84358 transitions. [2021-03-10 21:28:05,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:05,250 INFO L276 IsEmpty]: Start isEmpty. Operand 26571 states and 84358 transitions. [2021-03-10 21:28:05,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 21:28:05,286 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:05,286 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:05,486 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable953 [2021-03-10 21:28:05,486 INFO L428 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:05,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:05,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1597240143, now seen corresponding path program 509 times [2021-03-10 21:28:05,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:05,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815815669] [2021-03-10 21:28:05,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:05,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:05,789 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:05,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815815669] [2021-03-10 21:28:05,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175053587] [2021-03-10 21:28:05,789 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:05,810 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:28:05,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:05,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:28:05,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:06,431 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:06,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:06,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-03-10 21:28:06,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355310282] [2021-03-10 21:28:06,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:28:06,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:06,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:28:06,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:28:06,432 INFO L87 Difference]: Start difference. First operand 26571 states and 84358 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:10,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:10,351 INFO L93 Difference]: Finished difference Result 38199 states and 118872 transitions. [2021-03-10 21:28:10,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-03-10 21:28:10,355 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 21:28:10,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:10,517 INFO L225 Difference]: With dead ends: 38199 [2021-03-10 21:28:10,518 INFO L226 Difference]: Without dead ends: 38187 [2021-03-10 21:28:10,518 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2365 ImplicationChecksByTransitivity, 3507.9ms TimeCoverageRelationStatistics Valid=2504, Invalid=5506, Unknown=0, NotChecked=0, Total=8010 [2021-03-10 21:28:10,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38187 states. [2021-03-10 21:28:10,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38187 to 30268. [2021-03-10 21:28:10,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30268 states, 30267 states have (on average 3.1952621667162258) internal successors, (96711), 30267 states have internal predecessors, (96711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:11,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30268 states to 30268 states and 96711 transitions. [2021-03-10 21:28:11,036 INFO L78 Accepts]: Start accepts. Automaton has 30268 states and 96711 transitions. Word has length 26 [2021-03-10 21:28:11,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:11,036 INFO L480 AbstractCegarLoop]: Abstraction has 30268 states and 96711 transitions. [2021-03-10 21:28:11,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:11,036 INFO L276 IsEmpty]: Start isEmpty. Operand 30268 states and 96711 transitions. [2021-03-10 21:28:11,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 21:28:11,075 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:11,075 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:11,275 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 513 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable954 [2021-03-10 21:28:11,276 INFO L428 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:11,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:11,276 INFO L82 PathProgramCache]: Analyzing trace with hash -2126272347, now seen corresponding path program 510 times [2021-03-10 21:28:11,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:11,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989699659] [2021-03-10 21:28:11,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:11,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:11,611 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:11,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989699659] [2021-03-10 21:28:11,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828812519] [2021-03-10 21:28:11,612 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:11,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:28:11,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:11,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:28:11,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:12,326 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:12,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:12,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-03-10 21:28:12,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76502099] [2021-03-10 21:28:12,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:28:12,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:12,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:28:12,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:28:12,327 INFO L87 Difference]: Start difference. First operand 30268 states and 96711 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:16,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:16,427 INFO L93 Difference]: Finished difference Result 37783 states and 117254 transitions. [2021-03-10 21:28:16,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-03-10 21:28:16,431 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 21:28:16,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:16,496 INFO L225 Difference]: With dead ends: 37783 [2021-03-10 21:28:16,496 INFO L226 Difference]: Without dead ends: 37777 [2021-03-10 21:28:16,497 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2858 ImplicationChecksByTransitivity, 3642.4ms TimeCoverageRelationStatistics Valid=2139, Invalid=6791, Unknown=0, NotChecked=0, Total=8930 [2021-03-10 21:28:16,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37777 states. [2021-03-10 21:28:17,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37777 to 28751. [2021-03-10 21:28:17,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28751 states, 28750 states have (on average 3.173495652173913) internal successors, (91238), 28750 states have internal predecessors, (91238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:17,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28751 states to 28751 states and 91238 transitions. [2021-03-10 21:28:17,200 INFO L78 Accepts]: Start accepts. Automaton has 28751 states and 91238 transitions. Word has length 26 [2021-03-10 21:28:17,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:17,200 INFO L480 AbstractCegarLoop]: Abstraction has 28751 states and 91238 transitions. [2021-03-10 21:28:17,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:17,200 INFO L276 IsEmpty]: Start isEmpty. Operand 28751 states and 91238 transitions. [2021-03-10 21:28:17,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 21:28:17,238 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:17,238 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:17,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable955,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:17,452 INFO L428 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:17,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:17,452 INFO L82 PathProgramCache]: Analyzing trace with hash 237123403, now seen corresponding path program 511 times [2021-03-10 21:28:17,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:17,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798514667] [2021-03-10 21:28:17,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:17,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:17,753 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:17,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798514667] [2021-03-10 21:28:17,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801870959] [2021-03-10 21:28:17,754 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:28:17,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:17,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:28:17,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:18,367 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:18,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:18,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-03-10 21:28:18,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503082951] [2021-03-10 21:28:18,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:28:18,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:18,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:28:18,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:28:18,368 INFO L87 Difference]: Start difference. First operand 28751 states and 91238 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:23,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:23,362 INFO L93 Difference]: Finished difference Result 33431 states and 104589 transitions. [2021-03-10 21:28:23,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-03-10 21:28:23,365 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 21:28:23,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:23,417 INFO L225 Difference]: With dead ends: 33431 [2021-03-10 21:28:23,417 INFO L226 Difference]: Without dead ends: 33431 [2021-03-10 21:28:23,418 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2777 ImplicationChecksByTransitivity, 4186.2ms TimeCoverageRelationStatistics Valid=3559, Invalid=6541, Unknown=0, NotChecked=0, Total=10100 [2021-03-10 21:28:23,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33431 states. [2021-03-10 21:28:23,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33431 to 30211. [2021-03-10 21:28:23,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30211 states, 30210 states have (on average 3.1860973187686197) internal successors, (96252), 30210 states have internal predecessors, (96252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-03-10 21:28:24,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable956,515 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:24,113 WARN L545 AbstractCegarLoop]: Verification canceled [2021-03-10 21:28:24,116 WARN L224 ceAbstractionStarter]: Timeout [2021-03-10 21:28:24,116 INFO L202 PluginConnector]: Adding new model fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.03 09:28:24 BasicIcfg [2021-03-10 21:28:24,116 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-10 21:28:24,117 INFO L168 Benchmark]: Toolchain (without parser) took 895411.22 ms. Allocated memory was 255.9 MB in the beginning and 2.3 GB in the end (delta: 2.1 GB). Free memory was 236.9 MB in the beginning and 1.1 GB in the end (delta: -900.2 MB). Peak memory consumption was 1.2 GB. Max. memory is 16.0 GB. [2021-03-10 21:28:24,117 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 255.9 MB. Free memory is still 238.0 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 21:28:24,117 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.03 ms. Allocated memory is still 255.9 MB. Free memory was 236.4 MB in the beginning and 234.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 21:28:24,117 INFO L168 Benchmark]: Boogie Preprocessor took 11.30 ms. Allocated memory is still 255.9 MB. Free memory was 234.8 MB in the beginning and 233.8 MB in the end (delta: 957.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 21:28:24,117 INFO L168 Benchmark]: RCFGBuilder took 229.64 ms. Allocated memory is still 255.9 MB. Free memory was 233.8 MB in the beginning and 235.3 MB in the end (delta: -1.5 MB). Peak memory consumption was 20.7 MB. Max. memory is 16.0 GB. [2021-03-10 21:28:24,117 INFO L168 Benchmark]: TraceAbstraction took 895146.23 ms. Allocated memory was 255.9 MB in the beginning and 2.3 GB in the end (delta: 2.1 GB). Free memory was 235.2 MB in the beginning and 1.1 GB in the end (delta: -901.9 MB). Peak memory consumption was 1.2 GB. Max. memory is 16.0 GB. [2021-03-10 21:28:24,117 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 0.09 ms. Allocated memory is still 255.9 MB. Free memory is still 238.0 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 18.03 ms. Allocated memory is still 255.9 MB. Free memory was 236.4 MB in the beginning and 234.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.30 ms. Allocated memory is still 255.9 MB. Free memory was 234.8 MB in the beginning and 233.8 MB in the end (delta: 957.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 229.64 ms. Allocated memory is still 255.9 MB. Free memory was 233.8 MB in the beginning and 235.3 MB in the end (delta: -1.5 MB). Peak memory consumption was 20.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 895146.23 ms. Allocated memory was 255.9 MB in the beginning and 2.3 GB in the end (delta: 2.1 GB). Free memory was 235.2 MB in the beginning and 1.1 GB in the end (delta: -901.9 MB). Peak memory consumption was 1.2 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 64). Cancelled while ReachableStatesComputation was computing reachable states (23353 states constructedinput type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 895057.3ms, OverallIterations: 525, TraceHistogramMax: 7, EmptinessCheckTime: 5585.8ms, AutomataDifference: 474805.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 25023 SDtfs, 74332 SDslu, 236591 SDs, 0 SdLazy, 191635 SolverSat, 14084 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 78898.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29044 GetRequests, 7817 SyntacticMatches, 830 SemanticMatches, 20397 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311723 ImplicationChecksByTransitivity, 413323.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=30268occurred in iteration=523, InterpolantAutomatonStates: 17013, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 73960.4ms AutomataMinimizationTime, 525 MinimizatonAttempts, 398992 StatesRemovedByMinimization, 522 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1590.1ms SsaConstructionTime, 5124.9ms SatisfiabilityAnalysisTime, 223459.5ms InterpolantComputationTime, 22516 NumberOfCodeBlocks, 22516 NumberOfCodeBlocksAsserted, 1986 NumberOfCheckSat, 21477 ConstructedInterpolants, 0 QuantifiedInterpolants, 161637 SizeOfPredicates, 1460 NumberOfNonLiveVariables, 47948 ConjunctsInSsa, 12480 ConjunctsInUnsatCore, 1039 InterpolantComputations, 11 PerfectInterpolantSequences, 6769/26297 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