/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/nonblocking-counter-alt2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 16:56:45,615 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 16:56:45,625 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 16:56:45,667 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-15 16:56:45,706 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 [2022-03-15 16:56:45,728 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 16:56:45,728 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 16:56:45,728 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-15 16:56:45,728 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-15 16:56:45,729 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 16:56:45,729 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 16:56:45,729 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 16:56:45,729 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 16:56:45,730 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 16:56:45,730 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 16:56:45,730 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 16:56:45,730 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 16:56:45,730 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 16:56:45,731 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 16:56:45,731 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 16:56:45,731 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 16:56:45,731 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 16:56:45,731 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 16:56:45,731 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 16:56:45,731 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 16:56:45,731 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 16:56:45,731 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 16:56:45,731 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 16:56:45,731 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 16:56:45,731 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 16:56:45,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 16:56:45,732 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 16:56:45,732 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-15 16:56:45,732 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 16:56:45,732 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 16:56:45,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 16:56:45,732 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-15 16:56:45,732 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 16:56:45,732 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 16:56:45,915 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 16:56:45,937 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 16:56:45,939 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 16:56:45,939 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 16:56:45,941 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 16:56:45,941 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/nonblocking-counter-alt2.wvr.bpl [2022-03-15 16:56:45,942 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/nonblocking-counter-alt2.wvr.bpl' [2022-03-15 16:56:45,962 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 16:56:45,963 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 16:56:45,964 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 16:56:45,971 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 16:56:45,971 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 16:56:45,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:56:45" (1/1) ... [2022-03-15 16:56:45,991 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:56:45" (1/1) ... [2022-03-15 16:56:45,997 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 16:56:45,998 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 16:56:45,999 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 16:56:45,999 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 16:56:45,999 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 16:56:46,005 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:56:45" (1/1) ... [2022-03-15 16:56:46,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:56:45" (1/1) ... [2022-03-15 16:56:46,005 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:56:45" (1/1) ... [2022-03-15 16:56:46,005 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:56:45" (1/1) ... [2022-03-15 16:56:46,007 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:56:45" (1/1) ... [2022-03-15 16:56:46,016 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:56:45" (1/1) ... [2022-03-15 16:56:46,017 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:56:45" (1/1) ... [2022-03-15 16:56:46,017 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 16:56:46,018 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 16:56:46,018 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 16:56:46,018 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 16:56:46,019 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:56:45" (1/1) ... [2022-03-15 16:56:46,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 16:56:46,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:56:46,043 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-15 16:56:46,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-15 16:56:46,081 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-15 16:56:46,081 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 16:56:46,081 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 16:56:46,081 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-15 16:56:46,081 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-15 16:56:46,081 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-15 16:56:46,081 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-15 16:56:46,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 16:56:46,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 16:56:46,082 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-15 16:56:46,120 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 16:56:46,121 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 16:56:46,198 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 16:56:46,208 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 16:56:46,208 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-15 16:56:46,210 INFO L202 PluginConnector]: Adding new model nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 04:56:46 BoogieIcfgContainer [2022-03-15 16:56:46,210 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 16:56:46,211 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 16:56:46,211 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 16:56:46,218 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 16:56:46,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:56:45" (1/2) ... [2022-03-15 16:56:46,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cff237e and model type nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 04:56:46, skipping insertion in model container [2022-03-15 16:56:46,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 04:56:46" (2/2) ... [2022-03-15 16:56:46,220 INFO L111 eAbstractionObserver]: Analyzing ICFG nonblocking-counter-alt2.wvr.bpl [2022-03-15 16:56:46,224 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 16:56:46,224 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-15 16:56:46,224 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 16:56:46,224 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 16:56:46,260 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-15 16:56:46,288 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 16:56:46,296 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-15 16:56:46,297 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-15 16:56:46,303 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2022-03-15 16:56:46,318 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:56:46,319 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:56:46,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 16:56:46,331 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:56:46,332 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:56:46,332 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:56:46,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:56:46,336 INFO L85 PathProgramCache]: Analyzing trace with hash -618238623, now seen corresponding path program 1 times [2022-03-15 16:56:46,343 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:56:46,343 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304745386] [2022-03-15 16:56:46,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:56:46,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:56:46,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:56:46,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:56:46,467 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:56:46,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304745386] [2022-03-15 16:56:46,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304745386] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:56:46,468 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:56:46,468 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 16:56:46,469 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705879642] [2022-03-15 16:56:46,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:56:46,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 16:56:46,473 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:56:46,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 16:56:46,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-15 16:56:46,493 INFO L87 Difference]: Start difference. First operand has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:56:46,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:56:46,545 INFO L93 Difference]: Finished difference Result 43 states and 77 transitions. [2022-03-15 16:56:46,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 16:56:46,547 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 16:56:46,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:56:46,552 INFO L225 Difference]: With dead ends: 43 [2022-03-15 16:56:46,552 INFO L226 Difference]: Without dead ends: 43 [2022-03-15 16:56:46,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:56:46,556 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:56:46,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 30 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:56:46,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-15 16:56:46,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2022-03-15 16:56:46,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:56:46,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 67 transitions. [2022-03-15 16:56:46,579 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 67 transitions. Word has length 15 [2022-03-15 16:56:46,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:56:46,580 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 67 transitions. [2022-03-15 16:56:46,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:56:46,580 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 67 transitions. [2022-03-15 16:56:46,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 16:56:46,581 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:56:46,581 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:56:46,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 16:56:46,581 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:56:46,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:56:46,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1950061855, now seen corresponding path program 1 times [2022-03-15 16:56:46,582 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:56:46,582 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108043316] [2022-03-15 16:56:46,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:56:46,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:56:46,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:56:46,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:56:46,704 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:56:46,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108043316] [2022-03-15 16:56:46,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108043316] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:56:46,704 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:56:46,704 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 16:56:46,705 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184549142] [2022-03-15 16:56:46,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:56:46,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 16:56:46,706 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:56:46,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 16:56:46,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:56:46,707 INFO L87 Difference]: Start difference. First operand 38 states and 67 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:56:46,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:56:46,771 INFO L93 Difference]: Finished difference Result 50 states and 91 transitions. [2022-03-15 16:56:46,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 16:56:46,772 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 [2022-03-15 16:56:46,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:56:46,774 INFO L225 Difference]: With dead ends: 50 [2022-03-15 16:56:46,774 INFO L226 Difference]: Without dead ends: 50 [2022-03-15 16:56:46,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-15 16:56:46,775 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:56:46,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 27 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:56:46,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-15 16:56:46,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2022-03-15 16:56:46,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 43 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) [2022-03-15 16:56:46,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 79 transitions. [2022-03-15 16:56:46,782 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 79 transitions. Word has length 17 [2022-03-15 16:56:46,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:56:46,782 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 79 transitions. [2022-03-15 16:56:46,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:56:46,783 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 79 transitions. [2022-03-15 16:56:46,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 16:56:46,787 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:56:46,787 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:56:46,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-15 16:56:46,787 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:56:46,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:56:46,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1007893021, now seen corresponding path program 1 times [2022-03-15 16:56:46,789 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:56:46,789 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350773938] [2022-03-15 16:56:46,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:56:46,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:56:46,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:56:46,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:56:46,918 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:56:46,918 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350773938] [2022-03-15 16:56:46,918 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350773938] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:56:46,918 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752906936] [2022-03-15 16:56:46,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:56:46,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:56:46,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:56:46,920 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:56:46,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-15 16:56:46,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:56:46,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 16:56:46,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:56:47,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:56:47,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:56:47,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:56:47,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752906936] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:56:47,630 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:56:47,630 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-15 16:56:47,630 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072678688] [2022-03-15 16:56:47,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:56:47,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 16:56:47,638 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:56:47,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 16:56:47,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:56:47,639 INFO L87 Difference]: Start difference. First operand 44 states and 79 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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) [2022-03-15 16:56:47,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:56:47,777 INFO L93 Difference]: Finished difference Result 144 states and 274 transitions. [2022-03-15 16:56:47,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 16:56:47,777 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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 19 [2022-03-15 16:56:47,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:56:47,778 INFO L225 Difference]: With dead ends: 144 [2022-03-15 16:56:47,778 INFO L226 Difference]: Without dead ends: 113 [2022-03-15 16:56:47,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:56:47,779 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 99 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:56:47,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 113 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:56:47,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-03-15 16:56:47,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 55. [2022-03-15 16:56:47,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 54 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) [2022-03-15 16:56:47,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 103 transitions. [2022-03-15 16:56:47,786 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 103 transitions. Word has length 19 [2022-03-15 16:56:47,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:56:47,786 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 103 transitions. [2022-03-15 16:56:47,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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) [2022-03-15 16:56:47,786 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 103 transitions. [2022-03-15 16:56:47,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 16:56:47,787 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:56:47,787 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:56:47,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-15 16:56:48,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:56:48,008 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:56:48,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:56:48,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1821743003, now seen corresponding path program 2 times [2022-03-15 16:56:48,008 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:56:48,008 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639827878] [2022-03-15 16:56:48,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:56:48,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:56:48,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:56:48,093 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:56:48,093 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:56:48,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639827878] [2022-03-15 16:56:48,093 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639827878] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:56:48,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82302430] [2022-03-15 16:56:48,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:56:48,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:56:48,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:56:48,095 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:56:48,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-15 16:56:48,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:56:48,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:56:48,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:56:48,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:56:48,262 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:56:48,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:56:48,346 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:56:48,346 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82302430] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:56:48,346 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:56:48,346 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-03-15 16:56:48,347 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147191078] [2022-03-15 16:56:48,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:56:48,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 16:56:48,347 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:56:48,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 16:56:48,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:56:48,348 INFO L87 Difference]: Start difference. First operand 55 states and 103 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:56:48,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:56:48,612 INFO L93 Difference]: Finished difference Result 177 states and 328 transitions. [2022-03-15 16:56:48,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 16:56:48,612 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have 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 [2022-03-15 16:56:48,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:56:48,613 INFO L225 Difference]: With dead ends: 177 [2022-03-15 16:56:48,614 INFO L226 Difference]: Without dead ends: 177 [2022-03-15 16:56:48,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=756, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:56:48,615 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 175 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:56:48,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 81 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:56:48,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-03-15 16:56:48,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 75. [2022-03-15 16:56:48,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 74 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:56:48,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 149 transitions. [2022-03-15 16:56:48,635 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 149 transitions. Word has length 21 [2022-03-15 16:56:48,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:56:48,635 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 149 transitions. [2022-03-15 16:56:48,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:56:48,635 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 149 transitions. [2022-03-15 16:56:48,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 16:56:48,636 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:56:48,636 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:56:48,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-15 16:56:48,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-15 16:56:48,852 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:56:48,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:56:48,852 INFO L85 PathProgramCache]: Analyzing trace with hash 2071555341, now seen corresponding path program 3 times [2022-03-15 16:56:48,853 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:56:48,853 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798519839] [2022-03-15 16:56:48,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:56:48,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:56:48,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:56:48,902 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:56:48,903 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:56:48,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798519839] [2022-03-15 16:56:48,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798519839] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:56:48,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089176760] [2022-03-15 16:56:48,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:56:48,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:56:48,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:56:48,904 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:56:48,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-15 16:56:48,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:56:48,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:56:48,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:56:48,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:56:49,037 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:56:49,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:56:49,134 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:56:49,135 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089176760] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:56:49,135 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:56:49,135 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-03-15 16:56:49,135 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437979756] [2022-03-15 16:56:49,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:56:49,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 16:56:49,136 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:56:49,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 16:56:49,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:56:49,136 INFO L87 Difference]: Start difference. First operand 75 states and 149 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2022-03-15 16:56:49,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:56:49,375 INFO L93 Difference]: Finished difference Result 141 states and 267 transitions. [2022-03-15 16:56:49,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 16:56:49,375 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 21 [2022-03-15 16:56:49,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:56:49,376 INFO L225 Difference]: With dead ends: 141 [2022-03-15 16:56:49,376 INFO L226 Difference]: Without dead ends: 139 [2022-03-15 16:56:49,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=259, Invalid=553, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:56:49,377 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 132 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:56:49,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 40 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:56:49,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-03-15 16:56:49,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 77. [2022-03-15 16:56:49,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.986842105263158) internal successors, (151), 76 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:56:49,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 151 transitions. [2022-03-15 16:56:49,382 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 151 transitions. Word has length 21 [2022-03-15 16:56:49,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:56:49,382 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 151 transitions. [2022-03-15 16:56:49,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2022-03-15 16:56:49,382 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 151 transitions. [2022-03-15 16:56:49,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:56:49,382 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:56:49,382 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:56:49,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-15 16:56:49,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:56:49,592 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:56:49,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:56:49,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1720260825, now seen corresponding path program 4 times [2022-03-15 16:56:49,592 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:56:49,592 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214742729] [2022-03-15 16:56:49,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:56:49,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:56:49,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:56:49,772 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:56:49,773 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:56:49,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214742729] [2022-03-15 16:56:49,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214742729] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:56:49,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840020785] [2022-03-15 16:56:49,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:56:49,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:56:49,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:56:49,796 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:56:49,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-15 16:56:49,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:56:49,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:56:49,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 16:56:49,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:56:50,175 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:56:50,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:56:50,538 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:56:50,539 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840020785] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:56:50,539 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:56:50,539 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 28 [2022-03-15 16:56:50,539 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791303364] [2022-03-15 16:56:50,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:56:50,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:56:50,540 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:56:50,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:56:50,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:56:50,541 INFO L87 Difference]: Start difference. First operand 77 states and 151 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:56:51,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:56:51,324 INFO L93 Difference]: Finished difference Result 375 states and 737 transitions. [2022-03-15 16:56:51,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 16:56:51,324 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:56:51,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:56:51,326 INFO L225 Difference]: With dead ends: 375 [2022-03-15 16:56:51,326 INFO L226 Difference]: Without dead ends: 361 [2022-03-15 16:56:51,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=570, Invalid=1592, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:56:51,328 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 231 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 277 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:56:51,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 230 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 501 Invalid, 0 Unknown, 277 Unchecked, 0.2s Time] [2022-03-15 16:56:51,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-03-15 16:56:51,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 164. [2022-03-15 16:56:51,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.184049079754601) internal successors, (356), 163 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:56:51,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 356 transitions. [2022-03-15 16:56:51,347 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 356 transitions. Word has length 23 [2022-03-15 16:56:51,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:56:51,347 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 356 transitions. [2022-03-15 16:56:51,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:56:51,347 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 356 transitions. [2022-03-15 16:56:51,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:56:51,351 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:56:51,351 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:56:51,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-15 16:56:51,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:56:51,567 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:56:51,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:56:51,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1505995819, now seen corresponding path program 5 times [2022-03-15 16:56:51,568 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:56:51,568 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264388588] [2022-03-15 16:56:51,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:56:51,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:56:51,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:56:51,703 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:56:51,703 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:56:51,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264388588] [2022-03-15 16:56:51,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264388588] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:56:51,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254484816] [2022-03-15 16:56:51,704 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:56:51,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:56:51,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:56:51,705 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:56:51,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-15 16:56:51,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:56:51,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:56:51,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 16:56:51,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:56:52,090 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:56:52,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:56:52,671 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:56:52,671 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254484816] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:56:52,671 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:56:52,671 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 28 [2022-03-15 16:56:52,671 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833410847] [2022-03-15 16:56:52,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:56:52,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:56:52,672 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:56:52,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:56:52,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=585, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:56:52,673 INFO L87 Difference]: Start difference. First operand 164 states and 356 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:56:54,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:56:54,414 INFO L93 Difference]: Finished difference Result 646 states and 1281 transitions. [2022-03-15 16:56:54,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 16:56:54,415 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:56:54,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:56:54,419 INFO L225 Difference]: With dead ends: 646 [2022-03-15 16:56:54,419 INFO L226 Difference]: Without dead ends: 591 [2022-03-15 16:56:54,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1671 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1042, Invalid=4070, Unknown=0, NotChecked=0, Total=5112 [2022-03-15 16:56:54,421 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 396 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:56:54,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 236 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 718 Invalid, 0 Unknown, 222 Unchecked, 0.3s Time] [2022-03-15 16:56:54,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2022-03-15 16:56:54,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 206. [2022-03-15 16:56:54,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.229268292682927) internal successors, (457), 205 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:56:54,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 457 transitions. [2022-03-15 16:56:54,428 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 457 transitions. Word has length 23 [2022-03-15 16:56:54,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:56:54,428 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 457 transitions. [2022-03-15 16:56:54,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:56:54,428 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 457 transitions. [2022-03-15 16:56:54,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:56:54,429 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:56:54,429 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:56:54,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-15 16:56:54,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:56:54,644 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:56:54,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:56:54,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1378998987, now seen corresponding path program 6 times [2022-03-15 16:56:54,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:56:54,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345020052] [2022-03-15 16:56:54,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:56:54,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:56:54,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:56:54,794 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:56:54,794 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:56:54,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345020052] [2022-03-15 16:56:54,794 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345020052] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:56:54,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378075887] [2022-03-15 16:56:54,794 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:56:54,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:56:54,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:56:54,796 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:56:54,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-15 16:56:54,839 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:56:54,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:56:54,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 16:56:54,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:56:55,216 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:56:55,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:56:55,778 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:56:55,778 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378075887] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:56:55,778 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:56:55,779 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 28 [2022-03-15 16:56:55,779 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654545826] [2022-03-15 16:56:55,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:56:55,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:56:55,779 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:56:55,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:56:55,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=601, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:56:55,780 INFO L87 Difference]: Start difference. First operand 206 states and 457 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:56:58,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:56:58,604 INFO L93 Difference]: Finished difference Result 782 states and 1564 transitions. [2022-03-15 16:56:58,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-15 16:56:58,605 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:56:58,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:56:58,609 INFO L225 Difference]: With dead ends: 782 [2022-03-15 16:56:58,609 INFO L226 Difference]: Without dead ends: 715 [2022-03-15 16:56:58,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3029 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1765, Invalid=6607, Unknown=0, NotChecked=0, Total=8372 [2022-03-15 16:56:58,611 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 497 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 1106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:56:58,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [497 Valid, 225 Invalid, 1106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 771 Invalid, 0 Unknown, 198 Unchecked, 0.4s Time] [2022-03-15 16:56:58,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2022-03-15 16:56:58,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 213. [2022-03-15 16:56:58,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.2216981132075473) internal successors, (471), 212 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:56:58,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 471 transitions. [2022-03-15 16:56:58,637 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 471 transitions. Word has length 23 [2022-03-15 16:56:58,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:56:58,637 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 471 transitions. [2022-03-15 16:56:58,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:56:58,637 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 471 transitions. [2022-03-15 16:56:58,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:56:58,638 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:56:58,638 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:56:58,653 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-15 16:56:58,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:56:58,840 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:56:58,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:56:58,840 INFO L85 PathProgramCache]: Analyzing trace with hash 7492009, now seen corresponding path program 7 times [2022-03-15 16:56:58,840 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:56:58,840 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937256784] [2022-03-15 16:56:58,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:56:58,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:56:58,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:56:58,949 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:56:58,949 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:56:58,949 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937256784] [2022-03-15 16:56:58,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937256784] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:56:58,949 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233746470] [2022-03-15 16:56:58,949 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:56:58,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:56:58,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:56:58,951 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:56:58,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-15 16:56:58,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:56:58,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 16:56:58,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:56:59,222 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:56:59,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:56:59,346 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:56:59,346 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233746470] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:56:59,346 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:56:59,346 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2022-03-15 16:56:59,346 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119094065] [2022-03-15 16:56:59,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:56:59,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 16:56:59,347 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:56:59,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 16:56:59,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2022-03-15 16:56:59,347 INFO L87 Difference]: Start difference. First operand 213 states and 471 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:00,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:57:00,256 INFO L93 Difference]: Finished difference Result 713 states and 1422 transitions. [2022-03-15 16:57:00,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 16:57:00,256 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have 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 [2022-03-15 16:57:00,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:57:00,258 INFO L225 Difference]: With dead ends: 713 [2022-03-15 16:57:00,258 INFO L226 Difference]: Without dead ends: 686 [2022-03-15 16:57:00,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1137 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=979, Invalid=2561, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 16:57:00,261 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 431 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:57:00,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 142 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:57:00,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2022-03-15 16:57:00,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 301. [2022-03-15 16:57:00,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.3066666666666666) internal successors, (692), 300 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:00,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 692 transitions. [2022-03-15 16:57:00,278 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 692 transitions. Word has length 23 [2022-03-15 16:57:00,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:57:00,278 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 692 transitions. [2022-03-15 16:57:00,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:00,281 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 692 transitions. [2022-03-15 16:57:00,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:57:00,282 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:57:00,282 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:57:00,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-15 16:57:00,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:00,503 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:57:00,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:57:00,503 INFO L85 PathProgramCache]: Analyzing trace with hash 256165081, now seen corresponding path program 8 times [2022-03-15 16:57:00,504 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:57:00,504 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225855493] [2022-03-15 16:57:00,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:00,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:57:00,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:00,593 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:00,593 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:57:00,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225855493] [2022-03-15 16:57:00,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225855493] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:57:00,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930422689] [2022-03-15 16:57:00,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:57:00,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:00,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:57:00,595 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:57:00,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-15 16:57:00,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:57:00,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:57:00,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 16:57:00,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:57:00,850 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:00,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:57:01,051 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:01,051 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930422689] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:57:01,052 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:57:01,052 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-03-15 16:57:01,052 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366922005] [2022-03-15 16:57:01,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:57:01,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 16:57:01,052 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:57:01,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 16:57:01,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:57:01,053 INFO L87 Difference]: Start difference. First operand 301 states and 692 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:01,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:57:01,396 INFO L93 Difference]: Finished difference Result 524 states and 1132 transitions. [2022-03-15 16:57:01,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 16:57:01,397 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have 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 [2022-03-15 16:57:01,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:57:01,399 INFO L225 Difference]: With dead ends: 524 [2022-03-15 16:57:01,399 INFO L226 Difference]: Without dead ends: 520 [2022-03-15 16:57:01,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 16:57:01,400 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 160 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:57:01,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 86 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:57:01,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-03-15 16:57:01,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 343. [2022-03-15 16:57:01,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 2.324561403508772) internal successors, (795), 342 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:01,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 795 transitions. [2022-03-15 16:57:01,409 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 795 transitions. Word has length 23 [2022-03-15 16:57:01,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:57:01,409 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 795 transitions. [2022-03-15 16:57:01,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:01,420 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 795 transitions. [2022-03-15 16:57:01,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 16:57:01,421 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:57:01,421 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:57:01,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-15 16:57:01,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-15 16:57:01,622 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:57:01,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:57:01,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1482502569, now seen corresponding path program 9 times [2022-03-15 16:57:01,622 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:57:01,622 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684204856] [2022-03-15 16:57:01,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:01,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:57:01,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:01,711 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:01,711 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:57:01,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684204856] [2022-03-15 16:57:01,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684204856] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:57:01,722 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624361406] [2022-03-15 16:57:01,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:57:01,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:01,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:57:01,723 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:57:01,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-15 16:57:01,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:57:01,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:57:01,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 16:57:01,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:57:01,936 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:01,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:57:02,069 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:02,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624361406] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:57:02,070 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:57:02,070 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 23 [2022-03-15 16:57:02,070 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798977283] [2022-03-15 16:57:02,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:57:02,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:57:02,070 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:57:02,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:57:02,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:57:02,071 INFO L87 Difference]: Start difference. First operand 343 states and 795 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:02,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:57:02,672 INFO L93 Difference]: Finished difference Result 809 states and 1674 transitions. [2022-03-15 16:57:02,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 16:57:02,672 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 16:57:02,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:57:02,675 INFO L225 Difference]: With dead ends: 809 [2022-03-15 16:57:02,675 INFO L226 Difference]: Without dead ends: 809 [2022-03-15 16:57:02,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=782, Invalid=2298, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 16:57:02,676 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 252 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:57:02,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 139 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:57:02,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-03-15 16:57:02,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 335. [2022-03-15 16:57:02,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.338323353293413) internal successors, (781), 334 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:02,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 781 transitions. [2022-03-15 16:57:02,684 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 781 transitions. Word has length 25 [2022-03-15 16:57:02,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:57:02,685 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 781 transitions. [2022-03-15 16:57:02,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:02,685 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 781 transitions. [2022-03-15 16:57:02,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 16:57:02,685 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:57:02,685 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:57:02,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-15 16:57:02,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:02,886 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:57:02,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:57:02,886 INFO L85 PathProgramCache]: Analyzing trace with hash -781200115, now seen corresponding path program 10 times [2022-03-15 16:57:02,886 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:57:02,887 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697698749] [2022-03-15 16:57:02,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:02,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:57:02,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:02,946 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:02,946 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:57:02,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697698749] [2022-03-15 16:57:02,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697698749] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:57:02,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213438259] [2022-03-15 16:57:02,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:57:02,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:02,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:57:02,948 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:57:02,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-15 16:57:02,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:57:02,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:57:02,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 16:57:02,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:57:03,156 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:03,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:57:03,289 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:03,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213438259] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:57:03,290 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:57:03,290 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 21 [2022-03-15 16:57:03,290 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036253269] [2022-03-15 16:57:03,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:57:03,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 16:57:03,290 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:57:03,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 16:57:03,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:57:03,291 INFO L87 Difference]: Start difference. First operand 335 states and 781 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:03,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:57:03,851 INFO L93 Difference]: Finished difference Result 532 states and 1139 transitions. [2022-03-15 16:57:03,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 16:57:03,851 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 16:57:03,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:57:03,853 INFO L225 Difference]: With dead ends: 532 [2022-03-15 16:57:03,853 INFO L226 Difference]: Without dead ends: 528 [2022-03-15 16:57:03,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=847, Invalid=2015, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 16:57:03,854 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 189 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:57:03,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 67 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:57:03,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-03-15 16:57:03,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 330. [2022-03-15 16:57:03,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.3221884498480243) internal successors, (764), 329 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:03,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 764 transitions. [2022-03-15 16:57:03,861 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 764 transitions. Word has length 25 [2022-03-15 16:57:03,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:57:03,861 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 764 transitions. [2022-03-15 16:57:03,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:03,861 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 764 transitions. [2022-03-15 16:57:03,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:57:03,862 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:57:03,862 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:57:03,880 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-03-15 16:57:04,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-15 16:57:04,069 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:57:04,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:57:04,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1518663275, now seen corresponding path program 11 times [2022-03-15 16:57:04,069 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:57:04,069 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152457402] [2022-03-15 16:57:04,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:04,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:57:04,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:04,275 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:04,275 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:57:04,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152457402] [2022-03-15 16:57:04,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152457402] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:57:04,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725889631] [2022-03-15 16:57:04,276 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:57:04,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:04,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:57:04,278 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:57:04,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-15 16:57:04,311 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:57:04,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:57:04,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 16:57:04,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:57:04,672 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:04,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:57:05,018 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:05,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725889631] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:57:05,019 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:57:05,019 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-03-15 16:57:05,019 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565151827] [2022-03-15 16:57:05,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:57:05,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:57:05,019 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:57:05,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:57:05,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:57:05,020 INFO L87 Difference]: Start difference. First operand 330 states and 764 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:06,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:57:06,372 INFO L93 Difference]: Finished difference Result 1062 states and 2277 transitions. [2022-03-15 16:57:06,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-15 16:57:06,372 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:57:06,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:57:06,384 INFO L225 Difference]: With dead ends: 1062 [2022-03-15 16:57:06,384 INFO L226 Difference]: Without dead ends: 940 [2022-03-15 16:57:06,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1196 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=839, Invalid=3717, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 16:57:06,387 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 536 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:57:06,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [536 Valid, 278 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 886 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:57:06,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2022-03-15 16:57:06,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 434. [2022-03-15 16:57:06,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 2.33256351039261) internal successors, (1010), 433 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:06,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1010 transitions. [2022-03-15 16:57:06,429 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1010 transitions. Word has length 27 [2022-03-15 16:57:06,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:57:06,429 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 1010 transitions. [2022-03-15 16:57:06,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:06,429 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1010 transitions. [2022-03-15 16:57:06,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:57:06,430 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:57:06,430 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:57:06,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-15 16:57:06,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-15 16:57:06,630 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:57:06,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:57:06,631 INFO L85 PathProgramCache]: Analyzing trace with hash 2127718247, now seen corresponding path program 12 times [2022-03-15 16:57:06,631 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:57:06,631 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711328823] [2022-03-15 16:57:06,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:06,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:57:06,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:06,832 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:06,833 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:57:06,833 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711328823] [2022-03-15 16:57:06,833 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711328823] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:57:06,833 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448726272] [2022-03-15 16:57:06,833 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:57:06,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:06,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:57:06,848 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:57:06,881 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:57:06,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:57:06,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-15 16:57:06,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:57:06,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:57:07,389 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:07,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:57:08,015 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:08,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448726272] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:57:08,015 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:57:08,015 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 35 [2022-03-15 16:57:08,015 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783805845] [2022-03-15 16:57:08,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:57:08,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 16:57:08,016 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:57:08,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 16:57:08,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=943, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:57:08,016 INFO L87 Difference]: Start difference. First operand 434 states and 1010 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:22,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:57:22,613 INFO L93 Difference]: Finished difference Result 2209 states and 4746 transitions. [2022-03-15 16:57:22,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2022-03-15 16:57:22,613 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:57:22,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:57:22,619 INFO L225 Difference]: With dead ends: 2209 [2022-03-15 16:57:22,619 INFO L226 Difference]: Without dead ends: 2042 [2022-03-15 16:57:22,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 15488 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=6410, Invalid=29880, Unknown=0, NotChecked=0, Total=36290 [2022-03-15 16:57:22,624 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 668 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 1404 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 2160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 1404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 528 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:57:22,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [668 Valid, 450 Invalid, 2160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 1404 Invalid, 0 Unknown, 528 Unchecked, 0.7s Time] [2022-03-15 16:57:22,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2042 states. [2022-03-15 16:57:22,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2042 to 613. [2022-03-15 16:57:22,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 612 states have (on average 2.3562091503267975) internal successors, (1442), 612 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) [2022-03-15 16:57:22,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 1442 transitions. [2022-03-15 16:57:22,642 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 1442 transitions. Word has length 27 [2022-03-15 16:57:22,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:57:22,642 INFO L470 AbstractCegarLoop]: Abstraction has 613 states and 1442 transitions. [2022-03-15 16:57:22,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:22,642 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 1442 transitions. [2022-03-15 16:57:22,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:57:22,644 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:57:22,644 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:57:22,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-15 16:57:22,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-15 16:57:22,860 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:57:22,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:57:22,861 INFO L85 PathProgramCache]: Analyzing trace with hash 866515745, now seen corresponding path program 13 times [2022-03-15 16:57:22,861 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:57:22,861 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263885445] [2022-03-15 16:57:22,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:22,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:57:22,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:23,050 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:23,050 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:57:23,050 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263885445] [2022-03-15 16:57:23,050 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263885445] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:57:23,050 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735287264] [2022-03-15 16:57:23,051 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:57:23,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:23,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:57:23,052 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:57:23,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-15 16:57:23,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:23,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:57:23,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:57:23,493 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:23,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:57:24,106 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:24,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735287264] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:57:24,106 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:57:24,106 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 35 [2022-03-15 16:57:24,106 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891495240] [2022-03-15 16:57:24,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:57:24,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 16:57:24,106 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:57:24,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 16:57:24,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=948, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:57:24,107 INFO L87 Difference]: Start difference. First operand 613 states and 1442 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:33,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:57:33,224 INFO L93 Difference]: Finished difference Result 2366 states and 5234 transitions. [2022-03-15 16:57:33,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-03-15 16:57:33,224 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:57:33,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:57:33,230 INFO L225 Difference]: With dead ends: 2366 [2022-03-15 16:57:33,230 INFO L226 Difference]: Without dead ends: 2268 [2022-03-15 16:57:33,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 38 SyntacticMatches, 15 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 10932 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=4841, Invalid=19339, Unknown=0, NotChecked=0, Total=24180 [2022-03-15 16:57:33,232 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 648 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 1014 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 1883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 1014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 600 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:57:33,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [648 Valid, 252 Invalid, 1883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 1014 Invalid, 0 Unknown, 600 Unchecked, 0.6s Time] [2022-03-15 16:57:33,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2268 states. [2022-03-15 16:57:33,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2268 to 748. [2022-03-15 16:57:33,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 2.3842034805890227) internal successors, (1781), 747 states have internal predecessors, (1781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:33,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1781 transitions. [2022-03-15 16:57:33,253 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1781 transitions. Word has length 27 [2022-03-15 16:57:33,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:57:33,253 INFO L470 AbstractCegarLoop]: Abstraction has 748 states and 1781 transitions. [2022-03-15 16:57:33,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:33,253 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1781 transitions. [2022-03-15 16:57:33,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:57:33,254 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:57:33,254 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:57:33,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-15 16:57:33,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-15 16:57:33,468 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:57:33,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:57:33,468 INFO L85 PathProgramCache]: Analyzing trace with hash 597124453, now seen corresponding path program 14 times [2022-03-15 16:57:33,468 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:57:33,468 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683379310] [2022-03-15 16:57:33,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:33,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:57:33,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:33,636 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:33,636 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:57:33,636 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683379310] [2022-03-15 16:57:33,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683379310] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:57:33,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299106436] [2022-03-15 16:57:33,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:57:33,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:33,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:57:33,638 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:57:33,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-15 16:57:33,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:57:33,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:57:33,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 16:57:33,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:57:33,997 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:33,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:57:34,255 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:34,255 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299106436] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:57:34,255 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:57:34,255 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 30 [2022-03-15 16:57:34,255 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642480701] [2022-03-15 16:57:34,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:57:34,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:57:34,256 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:57:34,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:57:34,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:57:34,256 INFO L87 Difference]: Start difference. First operand 748 states and 1781 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:36,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:57:36,541 INFO L93 Difference]: Finished difference Result 2069 states and 4597 transitions. [2022-03-15 16:57:36,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-15 16:57:36,542 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:57:36,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:57:36,548 INFO L225 Difference]: With dead ends: 2069 [2022-03-15 16:57:36,548 INFO L226 Difference]: Without dead ends: 2060 [2022-03-15 16:57:36,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3709 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2367, Invalid=7533, Unknown=0, NotChecked=0, Total=9900 [2022-03-15 16:57:36,550 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 538 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:57:36,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [538 Valid, 235 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:57:36,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2022-03-15 16:57:36,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 1128. [2022-03-15 16:57:36,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 1127 states have (on average 2.3895297249334515) internal successors, (2693), 1127 states have internal predecessors, (2693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:36,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 2693 transitions. [2022-03-15 16:57:36,572 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 2693 transitions. Word has length 27 [2022-03-15 16:57:36,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:57:36,573 INFO L470 AbstractCegarLoop]: Abstraction has 1128 states and 2693 transitions. [2022-03-15 16:57:36,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:36,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 2693 transitions. [2022-03-15 16:57:36,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:57:36,574 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:57:36,574 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:57:36,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-15 16:57:36,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:36,810 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:57:36,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:57:36,811 INFO L85 PathProgramCache]: Analyzing trace with hash 2036570091, now seen corresponding path program 15 times [2022-03-15 16:57:36,811 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:57:36,811 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753651933] [2022-03-15 16:57:36,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:36,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:57:36,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:37,022 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:37,022 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:57:37,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753651933] [2022-03-15 16:57:37,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753651933] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:57:37,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083900378] [2022-03-15 16:57:37,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:57:37,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:37,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:57:37,024 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:57:37,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-15 16:57:37,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:57:37,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:57:37,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:57:37,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:57:37,605 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:37,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:57:38,175 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:38,175 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083900378] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:57:38,175 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:57:38,175 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 34 [2022-03-15 16:57:38,176 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576467597] [2022-03-15 16:57:38,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:57:38,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 16:57:38,176 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:57:38,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 16:57:38,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=900, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:57:38,177 INFO L87 Difference]: Start difference. First operand 1128 states and 2693 transitions. Second operand has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:43,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:57:43,476 INFO L93 Difference]: Finished difference Result 3134 states and 6922 transitions. [2022-03-15 16:57:43,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-03-15 16:57:43,476 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:57:43,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:57:43,487 INFO L225 Difference]: With dead ends: 3134 [2022-03-15 16:57:43,487 INFO L226 Difference]: Without dead ends: 2988 [2022-03-15 16:57:43,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10101 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=3863, Invalid=21577, Unknown=0, NotChecked=0, Total=25440 [2022-03-15 16:57:43,489 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 896 mSDsluCounter, 892 mSDsCounter, 0 mSdLazyCounter, 1740 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 896 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 2354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 1740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 352 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:57:43,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [896 Valid, 481 Invalid, 2354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 1740 Invalid, 0 Unknown, 352 Unchecked, 0.8s Time] [2022-03-15 16:57:43,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2988 states. [2022-03-15 16:57:43,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2988 to 1372. [2022-03-15 16:57:43,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1372 states, 1371 states have (on average 2.4033552151714077) internal successors, (3295), 1371 states have internal predecessors, (3295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:43,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 3295 transitions. [2022-03-15 16:57:43,518 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 3295 transitions. Word has length 27 [2022-03-15 16:57:43,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:57:43,519 INFO L470 AbstractCegarLoop]: Abstraction has 1372 states and 3295 transitions. [2022-03-15 16:57:43,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:43,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 3295 transitions. [2022-03-15 16:57:43,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:57:43,521 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:57:43,521 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:57:43,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-15 16:57:43,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-15 16:57:43,737 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:57:43,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:57:43,738 INFO L85 PathProgramCache]: Analyzing trace with hash 201920533, now seen corresponding path program 16 times [2022-03-15 16:57:43,738 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:57:43,738 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922433112] [2022-03-15 16:57:43,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:43,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:57:43,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:43,847 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:43,847 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:57:43,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922433112] [2022-03-15 16:57:43,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922433112] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:57:43,848 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279660730] [2022-03-15 16:57:43,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:57:43,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:43,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:57:43,849 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:57:43,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-15 16:57:43,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:57:43,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:57:43,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:57:43,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:57:44,180 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:44,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:57:44,594 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:44,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279660730] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:57:44,595 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:57:44,595 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 12] total 27 [2022-03-15 16:57:44,595 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658335017] [2022-03-15 16:57:44,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:57:44,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:57:44,595 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:57:44,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:57:44,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=565, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:57:44,596 INFO L87 Difference]: Start difference. First operand 1372 states and 3295 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:45,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:57:45,539 INFO L93 Difference]: Finished difference Result 2372 states and 5544 transitions. [2022-03-15 16:57:45,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 16:57:45,539 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:57:45,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:57:45,545 INFO L225 Difference]: With dead ends: 2372 [2022-03-15 16:57:45,545 INFO L226 Difference]: Without dead ends: 2358 [2022-03-15 16:57:45,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1751 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1404, Invalid=3852, Unknown=0, NotChecked=0, Total=5256 [2022-03-15 16:57:45,546 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 367 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:57:45,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 117 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:57:45,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2358 states. [2022-03-15 16:57:45,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2358 to 1471. [2022-03-15 16:57:45,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1471 states, 1470 states have (on average 2.4224489795918367) internal successors, (3561), 1470 states have internal predecessors, (3561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:45,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 3561 transitions. [2022-03-15 16:57:45,567 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 3561 transitions. Word has length 27 [2022-03-15 16:57:45,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:57:45,567 INFO L470 AbstractCegarLoop]: Abstraction has 1471 states and 3561 transitions. [2022-03-15 16:57:45,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:45,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 3561 transitions. [2022-03-15 16:57:45,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 16:57:45,569 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:57:45,570 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:57:45,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-15 16:57:45,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-15 16:57:45,785 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:57:45,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:57:45,786 INFO L85 PathProgramCache]: Analyzing trace with hash 167708947, now seen corresponding path program 17 times [2022-03-15 16:57:45,786 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:57:45,786 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651661503] [2022-03-15 16:57:45,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:45,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:57:45,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:45,877 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:45,877 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:57:45,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651661503] [2022-03-15 16:57:45,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651661503] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:57:45,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822842515] [2022-03-15 16:57:45,877 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:57:45,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:45,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:57:45,886 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:57:45,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-15 16:57:45,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 16:57:45,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:57:45,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 16:57:45,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:57:46,174 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:46,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:57:46,373 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:46,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822842515] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:57:46,374 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:57:46,374 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 30 [2022-03-15 16:57:46,374 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113333952] [2022-03-15 16:57:46,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:57:46,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:57:46,374 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:57:46,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:57:46,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:57:46,375 INFO L87 Difference]: Start difference. First operand 1471 states and 3561 transitions. Second operand has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 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) [2022-03-15 16:57:47,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:57:47,229 INFO L93 Difference]: Finished difference Result 2313 states and 5246 transitions. [2022-03-15 16:57:47,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-15 16:57:47,230 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 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) Word has length 29 [2022-03-15 16:57:47,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:57:47,236 INFO L225 Difference]: With dead ends: 2313 [2022-03-15 16:57:47,236 INFO L226 Difference]: Without dead ends: 2265 [2022-03-15 16:57:47,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1787 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1458, Invalid=4704, Unknown=0, NotChecked=0, Total=6162 [2022-03-15 16:57:47,237 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 487 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:57:47,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 132 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:57:47,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2265 states. [2022-03-15 16:57:47,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2265 to 1356. [2022-03-15 16:57:47,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 1355 states have (on average 2.429520295202952) internal successors, (3292), 1355 states have internal predecessors, (3292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:47,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 3292 transitions. [2022-03-15 16:57:47,260 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 3292 transitions. Word has length 29 [2022-03-15 16:57:47,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:57:47,260 INFO L470 AbstractCegarLoop]: Abstraction has 1356 states and 3292 transitions. [2022-03-15 16:57:47,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 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) [2022-03-15 16:57:47,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 3292 transitions. [2022-03-15 16:57:47,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 16:57:47,262 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:57:47,262 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:57:47,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-15 16:57:47,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:47,493 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:57:47,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:57:47,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1561014771, now seen corresponding path program 18 times [2022-03-15 16:57:47,493 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:57:47,494 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556623617] [2022-03-15 16:57:47,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:47,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:57:47,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:47,566 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:47,566 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:57:47,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556623617] [2022-03-15 16:57:47,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556623617] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:57:47,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543787302] [2022-03-15 16:57:47,567 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:57:47,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:47,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:57:47,568 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:57:47,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-15 16:57:47,595 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-15 16:57:47,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:57:47,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 16:57:47,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:57:47,840 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:47,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:57:48,062 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:48,062 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543787302] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:57:48,062 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:57:48,062 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 26 [2022-03-15 16:57:48,062 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899535848] [2022-03-15 16:57:48,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:57:48,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:57:48,063 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:57:48,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:57:48,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=512, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:57:48,063 INFO L87 Difference]: Start difference. First operand 1356 states and 3292 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:49,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:57:49,020 INFO L93 Difference]: Finished difference Result 1686 states and 3919 transitions. [2022-03-15 16:57:49,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-15 16:57:49,020 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-15 16:57:49,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:57:49,034 INFO L225 Difference]: With dead ends: 1686 [2022-03-15 16:57:49,034 INFO L226 Difference]: Without dead ends: 1682 [2022-03-15 16:57:49,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1587 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1559, Invalid=3991, Unknown=0, NotChecked=0, Total=5550 [2022-03-15 16:57:49,035 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 229 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:57:49,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 100 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:57:49,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2022-03-15 16:57:49,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 1318. [2022-03-15 16:57:49,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 2.4229309035687168) internal successors, (3191), 1317 states have internal predecessors, (3191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:49,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 3191 transitions. [2022-03-15 16:57:49,055 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 3191 transitions. Word has length 29 [2022-03-15 16:57:49,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:57:49,055 INFO L470 AbstractCegarLoop]: Abstraction has 1318 states and 3191 transitions. [2022-03-15 16:57:49,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:49,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 3191 transitions. [2022-03-15 16:57:49,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 16:57:49,057 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:57:49,057 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:57:49,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-15 16:57:49,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:49,271 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:57:49,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:57:49,272 INFO L85 PathProgramCache]: Analyzing trace with hash -634106839, now seen corresponding path program 19 times [2022-03-15 16:57:49,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:57:49,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482494209] [2022-03-15 16:57:49,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:49,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:57:49,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:49,382 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:57:49,383 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:57:49,383 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482494209] [2022-03-15 16:57:49,383 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482494209] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:57:49,383 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516582128] [2022-03-15 16:57:49,383 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:57:49,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:49,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:57:49,384 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:57:49,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-15 16:57:49,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:49,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 16:57:49,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:57:49,865 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:57:49,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:57:50,491 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:50,491 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516582128] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:57:50,491 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:57:50,492 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 28 [2022-03-15 16:57:50,492 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391694948] [2022-03-15 16:57:50,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:57:50,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:57:50,492 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:57:50,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:57:50,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:57:50,492 INFO L87 Difference]: Start difference. First operand 1318 states and 3191 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:53,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:57:53,306 INFO L93 Difference]: Finished difference Result 2767 states and 6117 transitions. [2022-03-15 16:57:53,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-15 16:57:53,306 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-15 16:57:53,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:57:53,311 INFO L225 Difference]: With dead ends: 2767 [2022-03-15 16:57:53,311 INFO L226 Difference]: Without dead ends: 2752 [2022-03-15 16:57:53,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4065 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2616, Invalid=8304, Unknown=0, NotChecked=0, Total=10920 [2022-03-15 16:57:53,312 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 440 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:57:53,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 244 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 922 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 16:57:53,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2752 states. [2022-03-15 16:57:53,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2752 to 1421. [2022-03-15 16:57:53,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1421 states, 1420 states have (on average 2.37887323943662) internal successors, (3378), 1420 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:53,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1421 states to 1421 states and 3378 transitions. [2022-03-15 16:57:53,338 INFO L78 Accepts]: Start accepts. Automaton has 1421 states and 3378 transitions. Word has length 29 [2022-03-15 16:57:53,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:57:53,338 INFO L470 AbstractCegarLoop]: Abstraction has 1421 states and 3378 transitions. [2022-03-15 16:57:53,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:57:53,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1421 states and 3378 transitions. [2022-03-15 16:57:53,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 16:57:53,340 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:57:53,340 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:57:53,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-15 16:57:53,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:53,562 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:57:53,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:57:53,563 INFO L85 PathProgramCache]: Analyzing trace with hash -870593497, now seen corresponding path program 20 times [2022-03-15 16:57:53,563 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:57:53,563 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300739169] [2022-03-15 16:57:53,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:57:53,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:57:53,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:57:53,755 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:53,755 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:57:53,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300739169] [2022-03-15 16:57:53,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300739169] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:57:53,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390124744] [2022-03-15 16:57:53,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:57:53,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:57:53,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:57:53,756 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:57:53,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-15 16:57:53,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:57:53,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:57:53,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 16:57:53,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:57:54,408 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:54,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:57:55,347 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:57:55,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390124744] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:57:55,347 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:57:55,347 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 15] total 37 [2022-03-15 16:57:55,347 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010545203] [2022-03-15 16:57:55,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:57:55,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 16:57:55,347 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:57:55,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 16:57:55,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1067, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 16:57:55,348 INFO L87 Difference]: Start difference. First operand 1421 states and 3378 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:00,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:58:00,744 INFO L93 Difference]: Finished difference Result 2866 states and 6426 transitions. [2022-03-15 16:58:00,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-15 16:58:00,744 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-15 16:58:00,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:58:00,748 INFO L225 Difference]: With dead ends: 2866 [2022-03-15 16:58:00,749 INFO L226 Difference]: Without dead ends: 2794 [2022-03-15 16:58:00,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4993 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=2991, Invalid=10349, Unknown=0, NotChecked=0, Total=13340 [2022-03-15 16:58:00,750 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 554 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 1561 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 1742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 1561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:58:00,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [554 Valid, 410 Invalid, 1742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 1561 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 16:58:00,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2794 states. [2022-03-15 16:58:00,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2794 to 1543. [2022-03-15 16:58:00,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1543 states, 1542 states have (on average 2.3605706874189365) internal successors, (3640), 1542 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:00,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 3640 transitions. [2022-03-15 16:58:00,774 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 3640 transitions. Word has length 29 [2022-03-15 16:58:00,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:58:00,774 INFO L470 AbstractCegarLoop]: Abstraction has 1543 states and 3640 transitions. [2022-03-15 16:58:00,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:00,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 3640 transitions. [2022-03-15 16:58:00,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:58:00,776 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:58:00,776 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:58:00,792 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-03-15 16:58:00,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-15 16:58:00,991 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:58:00,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:58:00,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1331432529, now seen corresponding path program 21 times [2022-03-15 16:58:00,992 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:58:00,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159225442] [2022-03-15 16:58:00,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:58:00,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:58:00,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:58:01,205 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:01,205 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:58:01,205 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159225442] [2022-03-15 16:58:01,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159225442] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:58:01,205 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528166900] [2022-03-15 16:58:01,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:58:01,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:01,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:58:01,220 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:58:01,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-15 16:58:01,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 16:58:01,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:58:01,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 16:58:01,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:58:01,826 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:01,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:58:02,413 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:02,414 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528166900] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:58:02,414 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:58:02,414 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-03-15 16:58:02,414 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998798432] [2022-03-15 16:58:02,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:58:02,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-15 16:58:02,414 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:58:02,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-15 16:58:02,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1239, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 16:58:02,415 INFO L87 Difference]: Start difference. First operand 1543 states and 3640 transitions. Second operand has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 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) [2022-03-15 16:58:07,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:58:07,299 INFO L93 Difference]: Finished difference Result 3195 states and 7142 transitions. [2022-03-15 16:58:07,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-03-15 16:58:07,300 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 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) Word has length 31 [2022-03-15 16:58:07,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:58:07,304 INFO L225 Difference]: With dead ends: 3195 [2022-03-15 16:58:07,304 INFO L226 Difference]: Without dead ends: 3182 [2022-03-15 16:58:07,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8119 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3862, Invalid=17308, Unknown=0, NotChecked=0, Total=21170 [2022-03-15 16:58:07,306 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 588 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 1322 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 2040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 541 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:58:07,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [588 Valid, 307 Invalid, 2040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1322 Invalid, 0 Unknown, 541 Unchecked, 0.6s Time] [2022-03-15 16:58:07,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3182 states. [2022-03-15 16:58:07,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3182 to 1828. [2022-03-15 16:58:07,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1828 states, 1827 states have (on average 2.3787629994526545) internal successors, (4346), 1827 states have internal predecessors, (4346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:07,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1828 states to 1828 states and 4346 transitions. [2022-03-15 16:58:07,357 INFO L78 Accepts]: Start accepts. Automaton has 1828 states and 4346 transitions. Word has length 31 [2022-03-15 16:58:07,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:58:07,357 INFO L470 AbstractCegarLoop]: Abstraction has 1828 states and 4346 transitions. [2022-03-15 16:58:07,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 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) [2022-03-15 16:58:07,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1828 states and 4346 transitions. [2022-03-15 16:58:07,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:58:07,360 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:58:07,360 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:58:07,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-15 16:58:07,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-03-15 16:58:07,576 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:58:07,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:58:07,577 INFO L85 PathProgramCache]: Analyzing trace with hash -87583581, now seen corresponding path program 22 times [2022-03-15 16:58:07,577 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:58:07,577 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071031460] [2022-03-15 16:58:07,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:58:07,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:58:07,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:58:07,767 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:07,767 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:58:07,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071031460] [2022-03-15 16:58:07,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071031460] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:58:07,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842720807] [2022-03-15 16:58:07,768 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:58:07,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:07,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:58:07,770 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:58:07,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-15 16:58:07,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:58:07,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:58:07,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 16:58:07,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:58:08,369 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:08,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:58:09,629 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:09,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842720807] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:58:09,630 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:58:09,630 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 41 [2022-03-15 16:58:09,630 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995985508] [2022-03-15 16:58:09,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:58:09,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 16:58:09,630 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:58:09,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 16:58:09,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1323, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 16:58:09,631 INFO L87 Difference]: Start difference. First operand 1828 states and 4346 transitions. Second operand has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:25,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:58:25,250 INFO L93 Difference]: Finished difference Result 4237 states and 9400 transitions. [2022-03-15 16:58:25,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2022-03-15 16:58:25,251 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:58:25,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:58:25,257 INFO L225 Difference]: With dead ends: 4237 [2022-03-15 16:58:25,257 INFO L226 Difference]: Without dead ends: 4083 [2022-03-15 16:58:25,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 42 SyntacticMatches, 23 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 18335 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=5852, Invalid=33154, Unknown=0, NotChecked=0, Total=39006 [2022-03-15 16:58:25,260 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 874 mSDsluCounter, 1248 mSDsCounter, 0 mSdLazyCounter, 2366 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 874 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 2881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 2366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 208 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:58:25,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [874 Valid, 693 Invalid, 2881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 2366 Invalid, 0 Unknown, 208 Unchecked, 1.1s Time] [2022-03-15 16:58:25,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4083 states. [2022-03-15 16:58:25,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4083 to 2081. [2022-03-15 16:58:25,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2081 states, 2080 states have (on average 2.3653846153846154) internal successors, (4920), 2080 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:25,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 4920 transitions. [2022-03-15 16:58:25,321 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 4920 transitions. Word has length 31 [2022-03-15 16:58:25,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:58:25,321 INFO L470 AbstractCegarLoop]: Abstraction has 2081 states and 4920 transitions. [2022-03-15 16:58:25,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:25,321 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 4920 transitions. [2022-03-15 16:58:25,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:58:25,334 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:58:25,335 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:58:25,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-15 16:58:25,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:25,551 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:58:25,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:58:25,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1093246803, now seen corresponding path program 23 times [2022-03-15 16:58:25,551 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:58:25,551 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865996866] [2022-03-15 16:58:25,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:58:25,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:58:25,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:58:25,767 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:25,767 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:58:25,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865996866] [2022-03-15 16:58:25,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865996866] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:58:25,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273149739] [2022-03-15 16:58:25,767 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:58:25,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:25,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:58:25,768 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:58:25,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-15 16:58:25,794 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 16:58:25,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:58:25,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 16:58:25,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:58:26,361 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:26,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:58:27,315 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:27,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273149739] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:58:27,315 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:58:27,315 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 41 [2022-03-15 16:58:27,316 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083589021] [2022-03-15 16:58:27,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:58:27,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 16:58:27,316 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:58:27,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 16:58:27,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=1344, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 16:58:27,316 INFO L87 Difference]: Start difference. First operand 2081 states and 4920 transitions. Second operand has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:43,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:58:43,371 INFO L93 Difference]: Finished difference Result 4464 states and 9835 transitions. [2022-03-15 16:58:43,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-03-15 16:58:43,375 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:58:43,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:58:43,393 INFO L225 Difference]: With dead ends: 4464 [2022-03-15 16:58:43,394 INFO L226 Difference]: Without dead ends: 4313 [2022-03-15 16:58:43,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 47 SyntacticMatches, 24 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 15729 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=5838, Invalid=28944, Unknown=0, NotChecked=0, Total=34782 [2022-03-15 16:58:43,396 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 885 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 2205 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 885 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 2639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 2205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:58:43,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [885 Valid, 406 Invalid, 2639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 2205 Invalid, 0 Unknown, 124 Unchecked, 1.0s Time] [2022-03-15 16:58:43,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4313 states. [2022-03-15 16:58:43,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4313 to 2299. [2022-03-15 16:58:43,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2299 states, 2298 states have (on average 2.365100087032202) internal successors, (5435), 2298 states have internal predecessors, (5435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:43,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 5435 transitions. [2022-03-15 16:58:43,432 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 5435 transitions. Word has length 31 [2022-03-15 16:58:43,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:58:43,432 INFO L470 AbstractCegarLoop]: Abstraction has 2299 states and 5435 transitions. [2022-03-15 16:58:43,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:43,432 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 5435 transitions. [2022-03-15 16:58:43,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:58:43,435 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:58:43,435 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:58:43,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-15 16:58:43,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:43,651 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:58:43,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:58:43,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1903086369, now seen corresponding path program 24 times [2022-03-15 16:58:43,651 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:58:43,651 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076072012] [2022-03-15 16:58:43,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:58:43,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:58:43,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:58:43,837 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:43,837 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:58:43,837 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076072012] [2022-03-15 16:58:43,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076072012] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:58:43,837 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865558258] [2022-03-15 16:58:43,837 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:58:43,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:43,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:58:43,838 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:58:43,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-15 16:58:43,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 16:58:43,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:58:43,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:58:43,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:58:44,360 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:44,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:58:44,775 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:44,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865558258] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:58:44,775 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:58:44,775 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 36 [2022-03-15 16:58:44,775 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373682072] [2022-03-15 16:58:44,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:58:44,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 16:58:44,776 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:58:44,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 16:58:44,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1012, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:58:44,776 INFO L87 Difference]: Start difference. First operand 2299 states and 5435 transitions. Second operand has 36 states, 36 states have (on average 2.25) internal successors, (81), 36 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) [2022-03-15 16:58:49,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:58:49,673 INFO L93 Difference]: Finished difference Result 6164 states and 13824 transitions. [2022-03-15 16:58:49,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-03-15 16:58:49,673 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 36 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) Word has length 31 [2022-03-15 16:58:49,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:58:49,680 INFO L225 Difference]: With dead ends: 6164 [2022-03-15 16:58:49,680 INFO L226 Difference]: Without dead ends: 6119 [2022-03-15 16:58:49,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12231 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=6371, Invalid=23041, Unknown=0, NotChecked=0, Total=29412 [2022-03-15 16:58:49,682 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 720 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 1442 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 1767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 1442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:58:49,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [720 Valid, 280 Invalid, 1767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 1442 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:58:49,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6119 states. [2022-03-15 16:58:49,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6119 to 3767. [2022-03-15 16:58:49,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3767 states, 3766 states have (on average 2.374137015400956) internal successors, (8941), 3766 states have internal predecessors, (8941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:49,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3767 states to 3767 states and 8941 transitions. [2022-03-15 16:58:49,741 INFO L78 Accepts]: Start accepts. Automaton has 3767 states and 8941 transitions. Word has length 31 [2022-03-15 16:58:49,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:58:49,741 INFO L470 AbstractCegarLoop]: Abstraction has 3767 states and 8941 transitions. [2022-03-15 16:58:49,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 36 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) [2022-03-15 16:58:49,741 INFO L276 IsEmpty]: Start isEmpty. Operand 3767 states and 8941 transitions. [2022-03-15 16:58:49,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:58:49,746 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:58:49,746 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:58:49,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-15 16:58:49,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-15 16:58:49,959 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:58:49,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:58:49,960 INFO L85 PathProgramCache]: Analyzing trace with hash -904596441, now seen corresponding path program 25 times [2022-03-15 16:58:49,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:58:49,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185646614] [2022-03-15 16:58:49,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:58:49,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:58:49,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:58:50,153 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:50,154 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:58:50,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185646614] [2022-03-15 16:58:50,154 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185646614] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:58:50,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733123838] [2022-03-15 16:58:50,154 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:58:50,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:50,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:58:50,155 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:58:50,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-15 16:58:50,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:58:50,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 16:58:50,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:58:50,732 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:50,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:58:51,143 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:51,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733123838] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:58:51,143 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:58:51,143 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-03-15 16:58:51,143 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108744733] [2022-03-15 16:58:51,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:58:51,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-15 16:58:51,144 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:58:51,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-15 16:58:51,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=1265, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 16:58:51,144 INFO L87 Difference]: Start difference. First operand 3767 states and 8941 transitions. Second operand has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 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) [2022-03-15 16:58:55,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:58:55,875 INFO L93 Difference]: Finished difference Result 6121 states and 14073 transitions. [2022-03-15 16:58:55,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-03-15 16:58:55,875 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 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) Word has length 31 [2022-03-15 16:58:55,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:58:55,883 INFO L225 Difference]: With dead ends: 6121 [2022-03-15 16:58:55,883 INFO L226 Difference]: Without dead ends: 6005 [2022-03-15 16:58:55,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 42 SyntacticMatches, 10 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8029 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3648, Invalid=16374, Unknown=0, NotChecked=0, Total=20022 [2022-03-15 16:58:55,885 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 530 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 1325 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 2202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 1325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 658 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:58:55,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [530 Valid, 225 Invalid, 2202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 1325 Invalid, 0 Unknown, 658 Unchecked, 0.5s Time] [2022-03-15 16:58:55,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6005 states. [2022-03-15 16:58:55,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6005 to 3993. [2022-03-15 16:58:55,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3993 states, 3992 states have (on average 2.3599699398797593) internal successors, (9421), 3992 states have internal predecessors, (9421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:58:55,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3993 states to 3993 states and 9421 transitions. [2022-03-15 16:58:55,983 INFO L78 Accepts]: Start accepts. Automaton has 3993 states and 9421 transitions. Word has length 31 [2022-03-15 16:58:55,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:58:55,984 INFO L470 AbstractCegarLoop]: Abstraction has 3993 states and 9421 transitions. [2022-03-15 16:58:55,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 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) [2022-03-15 16:58:55,984 INFO L276 IsEmpty]: Start isEmpty. Operand 3993 states and 9421 transitions. [2022-03-15 16:58:55,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:58:55,989 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:58:55,989 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:58:56,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-15 16:58:56,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-15 16:58:56,203 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:58:56,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:58:56,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1973777929, now seen corresponding path program 26 times [2022-03-15 16:58:56,204 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:58:56,204 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267517524] [2022-03-15 16:58:56,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:58:56,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:58:56,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:58:56,443 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:56,443 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:58:56,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267517524] [2022-03-15 16:58:56,444 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267517524] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:58:56,444 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944218593] [2022-03-15 16:58:56,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:58:56,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:58:56,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:58:56,445 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:58:56,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-15 16:58:56,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:58:56,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:58:56,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 16:58:56,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:58:57,155 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:57,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:58:58,153 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:58:58,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944218593] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:58:58,153 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:58:58,154 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 41 [2022-03-15 16:58:58,154 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146035148] [2022-03-15 16:58:58,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:58:58,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 16:58:58,155 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:58:58,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 16:58:58,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1350, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 16:58:58,155 INFO L87 Difference]: Start difference. First operand 3993 states and 9421 transitions. Second operand has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:19,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:59:19,624 INFO L93 Difference]: Finished difference Result 9171 states and 20860 transitions. [2022-03-15 16:59:19,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 220 states. [2022-03-15 16:59:19,624 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:59:19,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:59:19,650 INFO L225 Difference]: With dead ends: 9171 [2022-03-15 16:59:19,650 INFO L226 Difference]: Without dead ends: 9012 [2022-03-15 16:59:19,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 45 SyntacticMatches, 20 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 30286 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=10481, Invalid=54799, Unknown=0, NotChecked=0, Total=65280 [2022-03-15 16:59:19,653 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 1050 mSDsluCounter, 1108 mSDsCounter, 0 mSdLazyCounter, 2037 mSolverCounterSat, 409 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1050 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 3106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 409 IncrementalHoareTripleChecker+Valid, 2037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 660 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:59:19,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1050 Valid, 500 Invalid, 3106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [409 Valid, 2037 Invalid, 0 Unknown, 660 Unchecked, 1.1s Time] [2022-03-15 16:59:19,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9012 states. [2022-03-15 16:59:19,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9012 to 4514. [2022-03-15 16:59:19,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4514 states, 4513 states have (on average 2.348991801462442) internal successors, (10601), 4513 states have internal predecessors, (10601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:19,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4514 states to 4514 states and 10601 transitions. [2022-03-15 16:59:19,742 INFO L78 Accepts]: Start accepts. Automaton has 4514 states and 10601 transitions. Word has length 31 [2022-03-15 16:59:19,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:59:19,742 INFO L470 AbstractCegarLoop]: Abstraction has 4514 states and 10601 transitions. [2022-03-15 16:59:19,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:19,742 INFO L276 IsEmpty]: Start isEmpty. Operand 4514 states and 10601 transitions. [2022-03-15 16:59:19,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:59:19,759 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:59:19,759 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:59:19,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-15 16:59:19,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-15 16:59:19,976 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:59:19,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:59:19,976 INFO L85 PathProgramCache]: Analyzing trace with hash 35494899, now seen corresponding path program 27 times [2022-03-15 16:59:19,976 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:59:19,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018406966] [2022-03-15 16:59:19,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:59:19,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:59:19,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:59:20,155 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:20,155 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:59:20,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018406966] [2022-03-15 16:59:20,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018406966] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:59:20,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336780506] [2022-03-15 16:59:20,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:59:20,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:59:20,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:59:20,157 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:59:20,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-15 16:59:20,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 16:59:20,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:59:20,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 16:59:20,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:59:20,709 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:20,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:59:21,062 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:21,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336780506] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:59:21,063 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:59:21,063 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 36 [2022-03-15 16:59:21,063 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579324835] [2022-03-15 16:59:21,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:59:21,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 16:59:21,063 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:59:21,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 16:59:21,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=980, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:59:21,064 INFO L87 Difference]: Start difference. First operand 4514 states and 10601 transitions. Second operand has 36 states, 36 states have (on average 2.25) internal successors, (81), 36 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) [2022-03-15 16:59:23,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:59:23,086 INFO L93 Difference]: Finished difference Result 7799 states and 18028 transitions. [2022-03-15 16:59:23,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-15 16:59:23,086 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 36 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) Word has length 31 [2022-03-15 16:59:23,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:59:23,097 INFO L225 Difference]: With dead ends: 7799 [2022-03-15 16:59:23,097 INFO L226 Difference]: Without dead ends: 7793 [2022-03-15 16:59:23,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3365 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2444, Invalid=7258, Unknown=0, NotChecked=0, Total=9702 [2022-03-15 16:59:23,099 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 648 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 1193 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 1461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 1193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:59:23,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [648 Valid, 210 Invalid, 1461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 1193 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:59:23,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7793 states. [2022-03-15 16:59:23,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7793 to 5845. [2022-03-15 16:59:23,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5845 states, 5844 states have (on average 2.384154688569473) internal successors, (13933), 5844 states have internal predecessors, (13933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:23,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5845 states to 5845 states and 13933 transitions. [2022-03-15 16:59:23,201 INFO L78 Accepts]: Start accepts. Automaton has 5845 states and 13933 transitions. Word has length 31 [2022-03-15 16:59:23,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:59:23,201 INFO L470 AbstractCegarLoop]: Abstraction has 5845 states and 13933 transitions. [2022-03-15 16:59:23,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 36 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) [2022-03-15 16:59:23,202 INFO L276 IsEmpty]: Start isEmpty. Operand 5845 states and 13933 transitions. [2022-03-15 16:59:23,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:59:23,208 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:59:23,208 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:59:23,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-15 16:59:23,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-15 16:59:23,423 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:59:23,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:59:23,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1960214635, now seen corresponding path program 28 times [2022-03-15 16:59:23,424 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:59:23,425 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197502636] [2022-03-15 16:59:23,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:59:23,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:59:23,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:59:23,581 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:59:23,582 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:59:23,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197502636] [2022-03-15 16:59:23,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197502636] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:59:23,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153585983] [2022-03-15 16:59:23,582 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:59:23,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:59:23,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:59:23,583 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:59:23,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-15 16:59:23,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:59:23,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:59:23,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 16:59:23,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:59:24,214 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:59:24,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:59:24,510 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:24,510 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153585983] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:59:24,510 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:59:24,511 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 34 [2022-03-15 16:59:24,511 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934993948] [2022-03-15 16:59:24,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:59:24,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 16:59:24,511 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:59:24,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 16:59:24,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=844, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:59:24,511 INFO L87 Difference]: Start difference. First operand 5845 states and 13933 transitions. Second operand has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:25,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:59:25,591 INFO L93 Difference]: Finished difference Result 7411 states and 17541 transitions. [2022-03-15 16:59:25,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 16:59:25,591 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:59:25,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:59:25,601 INFO L225 Difference]: With dead ends: 7411 [2022-03-15 16:59:25,601 INFO L226 Difference]: Without dead ends: 7388 [2022-03-15 16:59:25,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1370 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1290, Invalid=3680, Unknown=0, NotChecked=0, Total=4970 [2022-03-15 16:59:25,602 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 362 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 1248 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:59:25,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 181 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1248 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:59:25,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7388 states. [2022-03-15 16:59:25,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7388 to 6246. [2022-03-15 16:59:25,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6246 states, 6245 states have (on average 2.387990392313851) internal successors, (14913), 6245 states have internal predecessors, (14913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:25,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6246 states to 6246 states and 14913 transitions. [2022-03-15 16:59:25,691 INFO L78 Accepts]: Start accepts. Automaton has 6246 states and 14913 transitions. Word has length 31 [2022-03-15 16:59:25,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:59:25,691 INFO L470 AbstractCegarLoop]: Abstraction has 6246 states and 14913 transitions. [2022-03-15 16:59:25,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:25,691 INFO L276 IsEmpty]: Start isEmpty. Operand 6246 states and 14913 transitions. [2022-03-15 16:59:25,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:59:25,698 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:59:25,698 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:59:25,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-15 16:59:25,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:59:25,914 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:59:25,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:59:25,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1947749671, now seen corresponding path program 29 times [2022-03-15 16:59:25,914 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:59:25,914 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784017037] [2022-03-15 16:59:25,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:59:25,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:59:25,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:59:26,039 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:26,039 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:59:26,039 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784017037] [2022-03-15 16:59:26,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784017037] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:59:26,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705417485] [2022-03-15 16:59:26,040 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:59:26,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:59:26,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:59:26,041 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:59:26,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-15 16:59:26,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-15 16:59:26,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:59:26,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 16:59:26,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:59:26,405 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:26,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:59:26,850 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:26,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705417485] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:59:26,850 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:59:26,850 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 34 [2022-03-15 16:59:26,850 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901557214] [2022-03-15 16:59:26,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:59:26,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 16:59:26,850 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:59:26,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 16:59:26,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=958, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:59:26,852 INFO L87 Difference]: Start difference. First operand 6246 states and 14913 transitions. Second operand has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 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) [2022-03-15 16:59:29,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:59:29,969 INFO L93 Difference]: Finished difference Result 9896 states and 23200 transitions. [2022-03-15 16:59:29,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-15 16:59:29,970 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 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) Word has length 31 [2022-03-15 16:59:29,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:59:29,983 INFO L225 Difference]: With dead ends: 9896 [2022-03-15 16:59:29,983 INFO L226 Difference]: Without dead ends: 9869 [2022-03-15 16:59:29,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3944 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2625, Invalid=8505, Unknown=0, NotChecked=0, Total=11130 [2022-03-15 16:59:29,985 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 442 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 1342 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 1522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:59:29,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 262 Invalid, 1522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1342 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 16:59:29,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9869 states. [2022-03-15 16:59:30,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9869 to 7467. [2022-03-15 16:59:30,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7467 states, 7466 states have (on average 2.40208947227431) internal successors, (17934), 7466 states have internal predecessors, (17934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:30,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7467 states to 7467 states and 17934 transitions. [2022-03-15 16:59:30,151 INFO L78 Accepts]: Start accepts. Automaton has 7467 states and 17934 transitions. Word has length 31 [2022-03-15 16:59:30,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:59:30,151 INFO L470 AbstractCegarLoop]: Abstraction has 7467 states and 17934 transitions. [2022-03-15 16:59:30,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 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) [2022-03-15 16:59:30,151 INFO L276 IsEmpty]: Start isEmpty. Operand 7467 states and 17934 transitions. [2022-03-15 16:59:30,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:59:30,161 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:59:30,161 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:59:30,179 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-15 16:59:30,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:59:30,379 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:59:30,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:59:30,380 INFO L85 PathProgramCache]: Analyzing trace with hash -352748575, now seen corresponding path program 30 times [2022-03-15 16:59:30,380 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:59:30,380 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671730753] [2022-03-15 16:59:30,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:59:30,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:59:30,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:59:30,598 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:59:30,599 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:59:30,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671730753] [2022-03-15 16:59:30,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671730753] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:59:30,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159741159] [2022-03-15 16:59:30,599 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:59:30,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:59:30,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:59:30,600 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:59:30,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-15 16:59:30,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 16:59:30,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:59:30,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:59:30,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:59:31,267 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:31,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:59:31,799 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:31,799 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159741159] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:59:31,799 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:59:31,799 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 15] total 40 [2022-03-15 16:59:31,799 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319288893] [2022-03-15 16:59:31,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:59:31,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-15 16:59:31,800 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:59:31,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-15 16:59:31,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1287, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 16:59:31,800 INFO L87 Difference]: Start difference. First operand 7467 states and 17934 transitions. Second operand has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 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) [2022-03-15 16:59:46,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:59:46,004 INFO L93 Difference]: Finished difference Result 12255 states and 28618 transitions. [2022-03-15 16:59:46,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2022-03-15 16:59:46,004 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 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) Word has length 31 [2022-03-15 16:59:46,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:59:46,018 INFO L225 Difference]: With dead ends: 12255 [2022-03-15 16:59:46,019 INFO L226 Difference]: Without dead ends: 12086 [2022-03-15 16:59:46,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22716 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=6944, Invalid=47112, Unknown=0, NotChecked=0, Total=54056 [2022-03-15 16:59:46,022 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 840 mSDsluCounter, 1051 mSDsCounter, 0 mSdLazyCounter, 2717 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 840 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 3045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 2717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:59:46,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [840 Valid, 600 Invalid, 3045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 2717 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-15 16:59:46,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12086 states. [2022-03-15 16:59:46,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12086 to 7931. [2022-03-15 16:59:46,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7931 states, 7930 states have (on average 2.4058007566204287) internal successors, (19078), 7930 states have internal predecessors, (19078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:46,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7931 states to 7931 states and 19078 transitions. [2022-03-15 16:59:46,161 INFO L78 Accepts]: Start accepts. Automaton has 7931 states and 19078 transitions. Word has length 31 [2022-03-15 16:59:46,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:59:46,161 INFO L470 AbstractCegarLoop]: Abstraction has 7931 states and 19078 transitions. [2022-03-15 16:59:46,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 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) [2022-03-15 16:59:46,161 INFO L276 IsEmpty]: Start isEmpty. Operand 7931 states and 19078 transitions. [2022-03-15 16:59:46,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:59:46,170 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:59:46,170 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:59:46,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-15 16:59:46,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-03-15 16:59:46,383 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:59:46,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:59:46,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1441871721, now seen corresponding path program 31 times [2022-03-15 16:59:46,384 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:59:46,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191024722] [2022-03-15 16:59:46,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:59:46,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:59:46,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:59:46,621 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:59:46,622 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:59:46,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191024722] [2022-03-15 16:59:46,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191024722] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:59:46,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141345945] [2022-03-15 16:59:46,622 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:59:46,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:59:46,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:59:46,624 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:59:46,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-15 16:59:46,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:59:46,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 16:59:46,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:59:47,283 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:47,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:59:48,277 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:48,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141345945] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:59:48,278 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:59:48,278 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 16] total 39 [2022-03-15 16:59:48,278 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596311741] [2022-03-15 16:59:48,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:59:48,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-15 16:59:48,278 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:59:48,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-15 16:59:48,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=1175, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 16:59:48,279 INFO L87 Difference]: Start difference. First operand 7931 states and 19078 transitions. Second operand has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 39 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) [2022-03-15 16:59:59,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:59:59,292 INFO L93 Difference]: Finished difference Result 14065 states and 33184 transitions. [2022-03-15 16:59:59,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-03-15 16:59:59,292 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 39 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) Word has length 31 [2022-03-15 16:59:59,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:59:59,309 INFO L225 Difference]: With dead ends: 14065 [2022-03-15 16:59:59,309 INFO L226 Difference]: Without dead ends: 13939 [2022-03-15 16:59:59,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 11148 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=6150, Invalid=22920, Unknown=0, NotChecked=0, Total=29070 [2022-03-15 16:59:59,310 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 809 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 2007 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 809 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 2357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 2007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:59:59,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [809 Valid, 529 Invalid, 2357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 2007 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-15 16:59:59,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13939 states. [2022-03-15 16:59:59,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13939 to 8747. [2022-03-15 16:59:59,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8747 states, 8746 states have (on average 2.4141321747084383) internal successors, (21114), 8746 states have internal predecessors, (21114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:59:59,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8747 states to 8747 states and 21114 transitions. [2022-03-15 16:59:59,509 INFO L78 Accepts]: Start accepts. Automaton has 8747 states and 21114 transitions. Word has length 31 [2022-03-15 16:59:59,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:59:59,509 INFO L470 AbstractCegarLoop]: Abstraction has 8747 states and 21114 transitions. [2022-03-15 16:59:59,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 39 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) [2022-03-15 16:59:59,510 INFO L276 IsEmpty]: Start isEmpty. Operand 8747 states and 21114 transitions. [2022-03-15 16:59:59,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:59:59,520 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:59:59,520 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:59:59,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-15 16:59:59,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:59:59,735 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:59:59,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:59:59,735 INFO L85 PathProgramCache]: Analyzing trace with hash -74939733, now seen corresponding path program 32 times [2022-03-15 16:59:59,735 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:59:59,735 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389650563] [2022-03-15 16:59:59,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:59:59,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:59:59,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:59:59,899 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:59:59,899 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:59:59,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389650563] [2022-03-15 16:59:59,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389650563] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:59:59,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112266182] [2022-03-15 16:59:59,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:59:59,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:59:59,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:59:59,900 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:59:59,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-15 16:59:59,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:59:59,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:59:59,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 16:59:59,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:00:00,486 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:00,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:00:01,176 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:01,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112266182] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:00:01,176 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:00:01,176 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-03-15 17:00:01,176 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146971021] [2022-03-15 17:00:01,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:00:01,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-15 17:00:01,177 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:00:01,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-15 17:00:01,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=1280, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 17:00:01,177 INFO L87 Difference]: Start difference. First operand 8747 states and 21114 transitions. Second operand has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 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) [2022-03-15 17:00:13,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:00:13,093 INFO L93 Difference]: Finished difference Result 18782 states and 44443 transitions. [2022-03-15 17:00:13,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 230 states. [2022-03-15 17:00:13,093 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 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) Word has length 31 [2022-03-15 17:00:13,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:00:13,128 INFO L225 Difference]: With dead ends: 18782 [2022-03-15 17:00:13,128 INFO L226 Difference]: Without dead ends: 18757 [2022-03-15 17:00:13,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28310 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=8746, Invalid=56534, Unknown=0, NotChecked=0, Total=65280 [2022-03-15 17:00:13,132 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 705 mSDsluCounter, 937 mSDsCounter, 0 mSdLazyCounter, 2092 mSolverCounterSat, 294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 705 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 3078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 2092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 692 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 17:00:13,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [705 Valid, 478 Invalid, 3078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 2092 Invalid, 0 Unknown, 692 Unchecked, 0.9s Time] [2022-03-15 17:00:13,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18757 states. [2022-03-15 17:00:13,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18757 to 9498. [2022-03-15 17:00:13,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9498 states, 9497 states have (on average 2.419816784247657) internal successors, (22981), 9497 states have internal predecessors, (22981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:13,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9498 states to 9498 states and 22981 transitions. [2022-03-15 17:00:13,411 INFO L78 Accepts]: Start accepts. Automaton has 9498 states and 22981 transitions. Word has length 31 [2022-03-15 17:00:13,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:00:13,411 INFO L470 AbstractCegarLoop]: Abstraction has 9498 states and 22981 transitions. [2022-03-15 17:00:13,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 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) [2022-03-15 17:00:13,411 INFO L276 IsEmpty]: Start isEmpty. Operand 9498 states and 22981 transitions. [2022-03-15 17:00:13,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 17:00:13,421 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:00:13,421 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:00:13,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-15 17:00:13,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:13,639 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:00:13,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:00:13,640 INFO L85 PathProgramCache]: Analyzing trace with hash 2119534507, now seen corresponding path program 33 times [2022-03-15 17:00:13,640 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:00:13,640 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744095128] [2022-03-15 17:00:13,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:00:13,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:00:13,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:00:13,837 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:13,837 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:00:13,837 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744095128] [2022-03-15 17:00:13,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744095128] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:00:13,837 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081917999] [2022-03-15 17:00:13,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:00:13,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:13,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:00:13,838 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:00:13,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-15 17:00:13,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 17:00:13,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:00:13,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 17:00:13,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:00:14,497 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:14,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:00:14,801 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:14,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081917999] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:00:14,801 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:00:14,801 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 36 [2022-03-15 17:00:14,801 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314277482] [2022-03-15 17:00:14,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:00:14,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 17:00:14,801 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:00:14,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 17:00:14,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1017, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 17:00:14,802 INFO L87 Difference]: Start difference. First operand 9498 states and 22981 transitions. Second operand has 36 states, 36 states have (on average 2.25) internal successors, (81), 36 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) [2022-03-15 17:00:17,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:00:17,787 INFO L93 Difference]: Finished difference Result 13376 states and 31636 transitions. [2022-03-15 17:00:17,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-15 17:00:17,787 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 36 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) Word has length 31 [2022-03-15 17:00:17,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:00:17,840 INFO L225 Difference]: With dead ends: 13376 [2022-03-15 17:00:17,840 INFO L226 Difference]: Without dead ends: 13355 [2022-03-15 17:00:17,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4718 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3140, Invalid=9742, Unknown=0, NotChecked=0, Total=12882 [2022-03-15 17:00:17,841 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 671 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 1421 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 1601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:00:17,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [671 Valid, 377 Invalid, 1601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1421 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 17:00:17,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13355 states. [2022-03-15 17:00:17,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13355 to 9888. [2022-03-15 17:00:18,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9888 states, 9887 states have (on average 2.43633053504602) internal successors, (24088), 9887 states have internal predecessors, (24088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:18,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9888 states to 9888 states and 24088 transitions. [2022-03-15 17:00:18,020 INFO L78 Accepts]: Start accepts. Automaton has 9888 states and 24088 transitions. Word has length 31 [2022-03-15 17:00:18,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:00:18,020 INFO L470 AbstractCegarLoop]: Abstraction has 9888 states and 24088 transitions. [2022-03-15 17:00:18,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 36 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) [2022-03-15 17:00:18,021 INFO L276 IsEmpty]: Start isEmpty. Operand 9888 states and 24088 transitions. [2022-03-15 17:00:18,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 17:00:18,030 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:00:18,030 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:00:18,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-15 17:00:18,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-15 17:00:18,232 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:00:18,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:00:18,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1454095937, now seen corresponding path program 34 times [2022-03-15 17:00:18,232 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:00:18,232 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768260607] [2022-03-15 17:00:18,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:00:18,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:00:18,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:00:18,440 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 17:00:18,440 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:00:18,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768260607] [2022-03-15 17:00:18,441 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768260607] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:00:18,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245021963] [2022-03-15 17:00:18,441 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:00:18,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:18,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:00:18,442 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:00:18,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-15 17:00:18,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:00:18,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:00:18,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:00:18,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:00:19,071 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:19,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:00:19,993 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:19,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245021963] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:00:19,993 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:00:19,993 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 40 [2022-03-15 17:00:19,993 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701464959] [2022-03-15 17:00:19,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:00:19,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-15 17:00:19,994 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:00:19,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-15 17:00:19,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=1277, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 17:00:19,994 INFO L87 Difference]: Start difference. First operand 9888 states and 24088 transitions. Second operand has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 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) [2022-03-15 17:00:41,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:00:41,999 INFO L93 Difference]: Finished difference Result 17705 states and 41885 transitions. [2022-03-15 17:00:42,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 223 states. [2022-03-15 17:00:42,000 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 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) Word has length 31 [2022-03-15 17:00:42,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:00:42,025 INFO L225 Difference]: With dead ends: 17705 [2022-03-15 17:00:42,025 INFO L226 Difference]: Without dead ends: 17594 [2022-03-15 17:00:42,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 45 SyntacticMatches, 17 SemanticMatches, 256 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 30848 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=10018, Invalid=56288, Unknown=0, NotChecked=0, Total=66306 [2022-03-15 17:00:42,029 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 949 mSDsluCounter, 1095 mSDsCounter, 0 mSdLazyCounter, 2540 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 949 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 3044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 2540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-15 17:00:42,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [949 Valid, 639 Invalid, 3044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 2540 Invalid, 0 Unknown, 155 Unchecked, 1.3s Time] [2022-03-15 17:00:42,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17594 states. [2022-03-15 17:00:42,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17594 to 10848. [2022-03-15 17:00:42,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10848 states, 10847 states have (on average 2.433576103991887) internal successors, (26397), 10847 states have internal predecessors, (26397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:42,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10848 states to 10848 states and 26397 transitions. [2022-03-15 17:00:42,246 INFO L78 Accepts]: Start accepts. Automaton has 10848 states and 26397 transitions. Word has length 31 [2022-03-15 17:00:42,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:00:42,246 INFO L470 AbstractCegarLoop]: Abstraction has 10848 states and 26397 transitions. [2022-03-15 17:00:42,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 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) [2022-03-15 17:00:42,246 INFO L276 IsEmpty]: Start isEmpty. Operand 10848 states and 26397 transitions. [2022-03-15 17:00:42,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 17:00:42,256 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:00:42,256 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:00:42,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-15 17:00:42,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-15 17:00:42,472 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:00:42,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:00:42,472 INFO L85 PathProgramCache]: Analyzing trace with hash -492324689, now seen corresponding path program 35 times [2022-03-15 17:00:42,472 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:00:42,472 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901759444] [2022-03-15 17:00:42,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:00:42,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:00:42,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:00:42,679 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:42,679 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:00:42,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901759444] [2022-03-15 17:00:42,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901759444] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:00:42,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221869823] [2022-03-15 17:00:42,679 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 17:00:42,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:42,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:00:42,680 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:00:42,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-15 17:00:42,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 17:00:42,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:00:42,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:00:42,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:00:43,480 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:43,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:00:44,314 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:44,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221869823] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:00:44,314 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:00:44,314 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-03-15 17:00:44,314 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542530281] [2022-03-15 17:00:44,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:00:44,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-15 17:00:44,314 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:00:44,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-15 17:00:44,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=1280, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 17:00:44,315 INFO L87 Difference]: Start difference. First operand 10848 states and 26397 transitions. Second operand has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 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) [2022-03-15 17:00:56,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:00:56,845 INFO L93 Difference]: Finished difference Result 17432 states and 41445 transitions. [2022-03-15 17:00:56,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 219 states. [2022-03-15 17:00:56,846 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 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) Word has length 31 [2022-03-15 17:00:56,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:00:56,868 INFO L225 Difference]: With dead ends: 17432 [2022-03-15 17:00:56,868 INFO L226 Difference]: Without dead ends: 17272 [2022-03-15 17:00:56,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25305 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=8414, Invalid=50878, Unknown=0, NotChecked=0, Total=59292 [2022-03-15 17:00:56,870 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 909 mSDsluCounter, 915 mSDsCounter, 0 mSdLazyCounter, 2293 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 3132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 2293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 540 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-15 17:00:56,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [909 Valid, 432 Invalid, 3132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 2293 Invalid, 0 Unknown, 540 Unchecked, 1.1s Time] [2022-03-15 17:00:56,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17272 states. [2022-03-15 17:00:57,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17272 to 10560. [2022-03-15 17:00:57,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10560 states, 10559 states have (on average 2.4364049625911544) internal successors, (25726), 10559 states have internal predecessors, (25726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:57,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10560 states to 10560 states and 25726 transitions. [2022-03-15 17:00:57,099 INFO L78 Accepts]: Start accepts. Automaton has 10560 states and 25726 transitions. Word has length 31 [2022-03-15 17:00:57,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:00:57,099 INFO L470 AbstractCegarLoop]: Abstraction has 10560 states and 25726 transitions. [2022-03-15 17:00:57,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 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) [2022-03-15 17:00:57,099 INFO L276 IsEmpty]: Start isEmpty. Operand 10560 states and 25726 transitions. [2022-03-15 17:00:57,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 17:00:57,109 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:00:57,109 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:00:57,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-15 17:00:57,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-15 17:00:57,324 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:00:57,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:00:57,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1685542175, now seen corresponding path program 36 times [2022-03-15 17:00:57,325 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:00:57,325 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891400833] [2022-03-15 17:00:57,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:00:57,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:00:57,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:00:57,402 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:57,403 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:00:57,403 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891400833] [2022-03-15 17:00:57,403 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891400833] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:00:57,403 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236910580] [2022-03-15 17:00:57,403 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 17:00:57,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:57,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:00:57,404 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:00:57,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-15 17:00:57,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 17:00:57,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:00:57,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 17:00:57,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:00:57,777 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:57,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:00:58,107 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:58,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236910580] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:00:58,108 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:00:58,108 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15] total 34 [2022-03-15 17:00:58,108 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689322803] [2022-03-15 17:00:58,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:00:58,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 17:00:58,108 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:00:58,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 17:00:58,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=903, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 17:00:58,109 INFO L87 Difference]: Start difference. First operand 10560 states and 25726 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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) [2022-03-15 17:00:59,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:00:59,295 INFO L93 Difference]: Finished difference Result 12545 states and 30331 transitions. [2022-03-15 17:00:59,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-15 17:00:59,296 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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) Word has length 31 [2022-03-15 17:00:59,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:00:59,313 INFO L225 Difference]: With dead ends: 12545 [2022-03-15 17:00:59,313 INFO L226 Difference]: Without dead ends: 12541 [2022-03-15 17:00:59,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2075 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1818, Invalid=4988, Unknown=0, NotChecked=0, Total=6806 [2022-03-15 17:00:59,314 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 291 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 17:00:59,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 186 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 17:00:59,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12541 states. [2022-03-15 17:00:59,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12541 to 11369. [2022-03-15 17:00:59,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11369 states, 11368 states have (on average 2.4481878958479943) internal successors, (27831), 11368 states have internal predecessors, (27831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:00:59,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11369 states to 11369 states and 27831 transitions. [2022-03-15 17:00:59,476 INFO L78 Accepts]: Start accepts. Automaton has 11369 states and 27831 transitions. Word has length 31 [2022-03-15 17:00:59,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:00:59,476 INFO L470 AbstractCegarLoop]: Abstraction has 11369 states and 27831 transitions. [2022-03-15 17:00:59,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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) [2022-03-15 17:00:59,476 INFO L276 IsEmpty]: Start isEmpty. Operand 11369 states and 27831 transitions. [2022-03-15 17:00:59,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 17:00:59,487 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:00:59,487 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:00:59,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-15 17:00:59,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:59,691 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:00:59,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:00:59,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1393248479, now seen corresponding path program 37 times [2022-03-15 17:00:59,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:00:59,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877169562] [2022-03-15 17:00:59,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:00:59,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:00:59,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:00:59,818 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:00:59,819 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:00:59,819 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877169562] [2022-03-15 17:00:59,819 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877169562] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:00:59,819 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995525541] [2022-03-15 17:00:59,819 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 17:00:59,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:00:59,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:00:59,820 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:00:59,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-15 17:00:59,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:00:59,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 17:00:59,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:01:00,314 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:00,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:01:00,638 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:00,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995525541] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:01:00,638 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:01:00,638 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 37 [2022-03-15 17:01:00,638 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564239298] [2022-03-15 17:01:00,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:01:00,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-15 17:01:00,638 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:01:00,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-15 17:01:00,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1152, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 17:01:00,639 INFO L87 Difference]: Start difference. First operand 11369 states and 27831 transitions. Second operand has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 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) [2022-03-15 17:01:02,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:01:02,461 INFO L93 Difference]: Finished difference Result 12972 states and 30945 transitions. [2022-03-15 17:01:02,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-15 17:01:02,462 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 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) Word has length 33 [2022-03-15 17:01:02,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:01:02,482 INFO L225 Difference]: With dead ends: 12972 [2022-03-15 17:01:02,482 INFO L226 Difference]: Without dead ends: 12972 [2022-03-15 17:01:02,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3545 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2658, Invalid=8898, Unknown=0, NotChecked=0, Total=11556 [2022-03-15 17:01:02,484 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 494 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 1052 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 1195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 17:01:02,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 251 Invalid, 1195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1052 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 17:01:02,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12972 states. [2022-03-15 17:01:02,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12972 to 10915. [2022-03-15 17:01:02,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10915 states, 10914 states have (on average 2.455011911306579) internal successors, (26794), 10914 states have internal predecessors, (26794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:02,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10915 states to 10915 states and 26794 transitions. [2022-03-15 17:01:02,662 INFO L78 Accepts]: Start accepts. Automaton has 10915 states and 26794 transitions. Word has length 33 [2022-03-15 17:01:02,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:01:02,662 INFO L470 AbstractCegarLoop]: Abstraction has 10915 states and 26794 transitions. [2022-03-15 17:01:02,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 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) [2022-03-15 17:01:02,662 INFO L276 IsEmpty]: Start isEmpty. Operand 10915 states and 26794 transitions. [2022-03-15 17:01:02,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 17:01:02,673 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:01:02,673 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:01:02,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-15 17:01:02,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-15 17:01:02,882 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:01:02,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:01:02,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1039636493, now seen corresponding path program 38 times [2022-03-15 17:01:02,884 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:01:02,884 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113250556] [2022-03-15 17:01:02,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:01:02,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:01:02,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:02,972 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:02,972 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:01:02,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113250556] [2022-03-15 17:01:02,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113250556] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:01:02,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230006567] [2022-03-15 17:01:02,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:01:02,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:02,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:01:02,974 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:01:02,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-15 17:01:02,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:01:02,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:01:02,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 17:01:02,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:01:03,360 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:03,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:01:03,563 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:03,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230006567] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:01:03,564 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:01:03,564 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 31 [2022-03-15 17:01:03,564 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685600409] [2022-03-15 17:01:03,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:01:03,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 17:01:03,564 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:01:03,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 17:01:03,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=734, Unknown=0, NotChecked=0, Total=992 [2022-03-15 17:01:03,565 INFO L87 Difference]: Start difference. First operand 10915 states and 26794 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 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) [2022-03-15 17:01:05,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:01:05,101 INFO L93 Difference]: Finished difference Result 11524 states and 27953 transitions. [2022-03-15 17:01:05,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-15 17:01:05,101 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 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) Word has length 33 [2022-03-15 17:01:05,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:01:05,118 INFO L225 Difference]: With dead ends: 11524 [2022-03-15 17:01:05,118 INFO L226 Difference]: Without dead ends: 11520 [2022-03-15 17:01:05,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3332 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2919, Invalid=7793, Unknown=0, NotChecked=0, Total=10712 [2022-03-15 17:01:05,120 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 322 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 17:01:05,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 102 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 17:01:05,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11520 states. [2022-03-15 17:01:05,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11520 to 10874. [2022-03-15 17:01:05,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10874 states, 10873 states have (on average 2.4531408075048287) internal successors, (26673), 10873 states have internal predecessors, (26673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:05,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10874 states to 10874 states and 26673 transitions. [2022-03-15 17:01:05,392 INFO L78 Accepts]: Start accepts. Automaton has 10874 states and 26673 transitions. Word has length 33 [2022-03-15 17:01:05,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:01:05,393 INFO L470 AbstractCegarLoop]: Abstraction has 10874 states and 26673 transitions. [2022-03-15 17:01:05,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 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) [2022-03-15 17:01:05,393 INFO L276 IsEmpty]: Start isEmpty. Operand 10874 states and 26673 transitions. [2022-03-15 17:01:05,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 17:01:05,419 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:01:05,419 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:01:05,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-15 17:01:05,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-15 17:01:05,620 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:01:05,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:01:05,620 INFO L85 PathProgramCache]: Analyzing trace with hash -2068346637, now seen corresponding path program 39 times [2022-03-15 17:01:05,620 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:01:05,621 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467839712] [2022-03-15 17:01:05,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:01:05,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:01:05,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:05,872 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:05,873 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:01:05,873 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467839712] [2022-03-15 17:01:05,873 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467839712] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:01:05,873 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050640232] [2022-03-15 17:01:05,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:01:05,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:05,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:01:05,887 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:01:05,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-15 17:01:05,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 17:01:05,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:01:05,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 17:01:05,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:01:06,655 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:06,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:01:07,290 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:07,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050640232] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:01:07,290 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:01:07,291 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 15] total 45 [2022-03-15 17:01:07,291 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866448789] [2022-03-15 17:01:07,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:01:07,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-15 17:01:07,291 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:01:07,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-15 17:01:07,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1734, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 17:01:07,292 INFO L87 Difference]: Start difference. First operand 10874 states and 26673 transitions. Second operand has 45 states, 45 states have (on average 2.0) internal successors, (90), 45 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:17,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:01:17,102 INFO L93 Difference]: Finished difference Result 14204 states and 34076 transitions. [2022-03-15 17:01:17,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 224 states. [2022-03-15 17:01:17,102 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.0) internal successors, (90), 45 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 17:01:17,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:01:17,124 INFO L225 Difference]: With dead ends: 14204 [2022-03-15 17:01:17,124 INFO L226 Difference]: Without dead ends: 14039 [2022-03-15 17:01:17,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23795 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=6830, Invalid=56422, Unknown=0, NotChecked=0, Total=63252 [2022-03-15 17:01:17,127 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 940 mSDsluCounter, 1178 mSDsCounter, 0 mSdLazyCounter, 3596 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 940 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 3957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 3596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-15 17:01:17,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [940 Valid, 607 Invalid, 3957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 3596 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-15 17:01:17,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14039 states. [2022-03-15 17:01:17,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14039 to 12176. [2022-03-15 17:01:17,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12176 states, 12175 states have (on average 2.4552772073921973) internal successors, (29893), 12175 states have internal predecessors, (29893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:17,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12176 states to 12176 states and 29893 transitions. [2022-03-15 17:01:17,307 INFO L78 Accepts]: Start accepts. Automaton has 12176 states and 29893 transitions. Word has length 33 [2022-03-15 17:01:17,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:01:17,307 INFO L470 AbstractCegarLoop]: Abstraction has 12176 states and 29893 transitions. [2022-03-15 17:01:17,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.0) internal successors, (90), 45 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:17,307 INFO L276 IsEmpty]: Start isEmpty. Operand 12176 states and 29893 transitions. [2022-03-15 17:01:17,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 17:01:17,319 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:01:17,319 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:01:17,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-03-15 17:01:17,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:17,524 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:01:17,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:01:17,525 INFO L85 PathProgramCache]: Analyzing trace with hash -226544083, now seen corresponding path program 40 times [2022-03-15 17:01:17,525 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:01:17,525 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609260051] [2022-03-15 17:01:17,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:01:17,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:01:17,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:17,918 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:17,918 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:01:17,918 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609260051] [2022-03-15 17:01:17,918 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609260051] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:01:17,918 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101718047] [2022-03-15 17:01:17,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:01:17,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:17,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:01:17,919 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:01:17,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-15 17:01:17,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:01:17,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:01:17,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 17:01:17,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:01:18,829 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:18,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:01:20,076 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:20,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101718047] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:01:20,076 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:01:20,076 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 16] total 40 [2022-03-15 17:01:20,083 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000655878] [2022-03-15 17:01:20,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:01:20,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-15 17:01:20,084 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:01:20,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-15 17:01:20,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1266, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 17:01:20,084 INFO L87 Difference]: Start difference. First operand 12176 states and 29893 transitions. Second operand has 40 states, 40 states have (on average 2.175) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:35,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:01:35,039 INFO L93 Difference]: Finished difference Result 18035 states and 43408 transitions. [2022-03-15 17:01:35,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-03-15 17:01:35,040 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.175) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 17:01:35,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:01:35,070 INFO L225 Difference]: With dead ends: 18035 [2022-03-15 17:01:35,070 INFO L226 Difference]: Without dead ends: 17960 [2022-03-15 17:01:35,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8150 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=4479, Invalid=18473, Unknown=0, NotChecked=0, Total=22952 [2022-03-15 17:01:35,071 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 653 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 1770 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 2081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 1770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 17:01:35,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [653 Valid, 333 Invalid, 2081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 1770 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-15 17:01:35,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17960 states. [2022-03-15 17:01:35,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17960 to 13359. [2022-03-15 17:01:35,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13359 states, 13358 states have (on average 2.4353196586315318) internal successors, (32531), 13358 states have internal predecessors, (32531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:35,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13359 states to 13359 states and 32531 transitions. [2022-03-15 17:01:35,324 INFO L78 Accepts]: Start accepts. Automaton has 13359 states and 32531 transitions. Word has length 33 [2022-03-15 17:01:35,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:01:35,324 INFO L470 AbstractCegarLoop]: Abstraction has 13359 states and 32531 transitions. [2022-03-15 17:01:35,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.175) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:35,324 INFO L276 IsEmpty]: Start isEmpty. Operand 13359 states and 32531 transitions. [2022-03-15 17:01:35,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 17:01:35,337 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:01:35,337 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:01:35,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-15 17:01:35,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-03-15 17:01:35,551 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:01:35,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:01:35,552 INFO L85 PathProgramCache]: Analyzing trace with hash -420701097, now seen corresponding path program 41 times [2022-03-15 17:01:35,552 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:01:35,552 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029031660] [2022-03-15 17:01:35,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:01:35,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:01:35,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:35,642 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 17:01:35,642 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:01:35,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029031660] [2022-03-15 17:01:35,642 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029031660] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:01:35,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140274143] [2022-03-15 17:01:35,642 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 17:01:35,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:35,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:01:35,644 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:01:35,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-15 17:01:35,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-03-15 17:01:35,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:01:35,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 17:01:35,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:01:36,325 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 17:01:36,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:01:37,052 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:37,052 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140274143] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:01:37,052 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:01:37,052 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 15] total 32 [2022-03-15 17:01:37,053 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127339315] [2022-03-15 17:01:37,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:01:37,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 17:01:37,053 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:01:37,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 17:01:37,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 17:01:37,053 INFO L87 Difference]: Start difference. First operand 13359 states and 32531 transitions. Second operand has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 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) [2022-03-15 17:01:38,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:01:38,635 INFO L93 Difference]: Finished difference Result 14697 states and 35526 transitions. [2022-03-15 17:01:38,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-15 17:01:38,636 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 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) Word has length 33 [2022-03-15 17:01:38,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:01:38,660 INFO L225 Difference]: With dead ends: 14697 [2022-03-15 17:01:38,661 INFO L226 Difference]: Without dead ends: 14691 [2022-03-15 17:01:38,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2251 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1713, Invalid=4929, Unknown=0, NotChecked=0, Total=6642 [2022-03-15 17:01:38,666 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 366 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 1086 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 1257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 1086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 17:01:38,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 169 Invalid, 1257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 1086 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 17:01:38,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14691 states. [2022-03-15 17:01:38,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14691 to 13470. [2022-03-15 17:01:38,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13470 states, 13469 states have (on average 2.432994283168758) internal successors, (32770), 13469 states have internal predecessors, (32770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:38,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13470 states to 13470 states and 32770 transitions. [2022-03-15 17:01:38,898 INFO L78 Accepts]: Start accepts. Automaton has 13470 states and 32770 transitions. Word has length 33 [2022-03-15 17:01:38,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:01:38,899 INFO L470 AbstractCegarLoop]: Abstraction has 13470 states and 32770 transitions. [2022-03-15 17:01:38,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 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) [2022-03-15 17:01:38,900 INFO L276 IsEmpty]: Start isEmpty. Operand 13470 states and 32770 transitions. [2022-03-15 17:01:38,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 17:01:38,923 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:01:38,923 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:01:38,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-15 17:01:39,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:39,137 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:01:39,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:01:39,137 INFO L85 PathProgramCache]: Analyzing trace with hash -971038451, now seen corresponding path program 42 times [2022-03-15 17:01:39,137 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:01:39,137 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958316947] [2022-03-15 17:01:39,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:01:39,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:01:39,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:39,408 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:39,408 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:01:39,408 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958316947] [2022-03-15 17:01:39,409 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958316947] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:01:39,409 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185838590] [2022-03-15 17:01:39,409 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 17:01:39,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:39,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:01:39,410 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:01:39,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-15 17:01:39,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 17:01:39,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:01:39,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-15 17:01:39,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:01:40,262 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:40,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:01:40,919 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:40,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185838590] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:01:40,920 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:01:40,920 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 46 [2022-03-15 17:01:40,921 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637970977] [2022-03-15 17:01:40,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:01:40,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-15 17:01:40,921 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:01:40,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-15 17:01:40,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=1661, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 17:01:40,922 INFO L87 Difference]: Start difference. First operand 13470 states and 32770 transitions. Second operand has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:54,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:01:54,847 INFO L93 Difference]: Finished difference Result 19054 states and 45384 transitions. [2022-03-15 17:01:54,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-03-15 17:01:54,847 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 17:01:54,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:01:54,879 INFO L225 Difference]: With dead ends: 19054 [2022-03-15 17:01:54,879 INFO L226 Difference]: Without dead ends: 19045 [2022-03-15 17:01:54,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23019 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=8705, Invalid=45817, Unknown=0, NotChecked=0, Total=54522 [2022-03-15 17:01:54,883 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1186 mSDsluCounter, 911 mSDsCounter, 0 mSdLazyCounter, 1987 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1186 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 2954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 1987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 652 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-15 17:01:54,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1186 Valid, 411 Invalid, 2954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 1987 Invalid, 0 Unknown, 652 Unchecked, 1.1s Time] [2022-03-15 17:01:54,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19045 states. [2022-03-15 17:01:55,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19045 to 13793. [2022-03-15 17:01:55,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13793 states, 13792 states have (on average 2.4365574245939676) internal successors, (33605), 13792 states have internal predecessors, (33605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:55,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13793 states to 13793 states and 33605 transitions. [2022-03-15 17:01:55,178 INFO L78 Accepts]: Start accepts. Automaton has 13793 states and 33605 transitions. Word has length 35 [2022-03-15 17:01:55,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:01:55,178 INFO L470 AbstractCegarLoop]: Abstraction has 13793 states and 33605 transitions. [2022-03-15 17:01:55,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:01:55,178 INFO L276 IsEmpty]: Start isEmpty. Operand 13793 states and 33605 transitions. [2022-03-15 17:01:55,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 17:01:55,195 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:01:55,195 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:01:55,211 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-03-15 17:01:55,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:55,407 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:01:55,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:01:55,408 INFO L85 PathProgramCache]: Analyzing trace with hash 255734751, now seen corresponding path program 43 times [2022-03-15 17:01:55,408 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:01:55,408 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244101371] [2022-03-15 17:01:55,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:01:55,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:01:55,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:55,700 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:55,700 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:01:55,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244101371] [2022-03-15 17:01:55,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244101371] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:01:55,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23942648] [2022-03-15 17:01:55,700 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 17:01:55,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:01:55,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:01:55,701 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:01:55,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-15 17:01:55,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:01:55,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-15 17:01:55,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:01:56,515 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:56,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:01:58,394 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:01:58,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23942648] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:01:58,394 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:01:58,395 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 18] total 47 [2022-03-15 17:01:58,395 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535026288] [2022-03-15 17:01:58,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:01:58,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-15 17:01:58,395 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:01:58,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-15 17:01:58,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=1766, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 17:01:58,395 INFO L87 Difference]: Start difference. First operand 13793 states and 33605 transitions. Second operand has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:34,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:02:34,751 INFO L93 Difference]: Finished difference Result 20048 states and 47741 transitions. [2022-03-15 17:02:34,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 210 states. [2022-03-15 17:02:34,752 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 17:02:34,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:02:34,781 INFO L225 Difference]: With dead ends: 20048 [2022-03-15 17:02:34,781 INFO L226 Difference]: Without dead ends: 20011 [2022-03-15 17:02:34,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 27278 ImplicationChecksByTransitivity, 35.7s TimeCoverageRelationStatistics Valid=10703, Invalid=52549, Unknown=0, NotChecked=0, Total=63252 [2022-03-15 17:02:34,785 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1342 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 2438 mSolverCounterSat, 432 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1342 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 3249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 432 IncrementalHoareTripleChecker+Valid, 2438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 379 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-15 17:02:34,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1342 Valid, 541 Invalid, 3249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [432 Valid, 2438 Invalid, 0 Unknown, 379 Unchecked, 1.4s Time] [2022-03-15 17:02:34,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20011 states. [2022-03-15 17:02:35,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20011 to 14278. [2022-03-15 17:02:35,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14278 states, 14277 states have (on average 2.436856482454297) internal successors, (34791), 14277 states have internal predecessors, (34791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:35,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14278 states to 14278 states and 34791 transitions. [2022-03-15 17:02:35,063 INFO L78 Accepts]: Start accepts. Automaton has 14278 states and 34791 transitions. Word has length 35 [2022-03-15 17:02:35,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:02:35,063 INFO L470 AbstractCegarLoop]: Abstraction has 14278 states and 34791 transitions. [2022-03-15 17:02:35,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:02:35,064 INFO L276 IsEmpty]: Start isEmpty. Operand 14278 states and 34791 transitions. [2022-03-15 17:02:35,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 17:02:35,081 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:02:35,081 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:02:35,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-15 17:02:35,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-15 17:02:35,297 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:02:35,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:02:35,298 INFO L85 PathProgramCache]: Analyzing trace with hash 975083881, now seen corresponding path program 44 times [2022-03-15 17:02:35,298 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:02:35,298 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765870483] [2022-03-15 17:02:35,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:02:35,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:02:35,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:02:35,503 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:35,503 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:02:35,503 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765870483] [2022-03-15 17:02:35,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765870483] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:02:35,503 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269872480] [2022-03-15 17:02:35,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:02:35,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:02:35,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:02:35,504 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:02:35,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-15 17:02:35,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:02:35,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:02:35,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-15 17:02:35,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:02:36,281 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:36,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:02:38,133 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:02:38,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269872480] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:02:38,134 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:02:38,134 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 18] total 47 [2022-03-15 17:02:38,134 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131532227] [2022-03-15 17:02:38,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:02:38,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-15 17:02:38,135 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:02:38,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-15 17:02:38,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=1789, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 17:02:38,135 INFO L87 Difference]: Start difference. First operand 14278 states and 34791 transitions. Second operand has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:05,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:03:05,868 INFO L93 Difference]: Finished difference Result 21356 states and 50836 transitions. [2022-03-15 17:03:05,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2022-03-15 17:03:05,869 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 17:03:05,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:03:05,906 INFO L225 Difference]: With dead ends: 21356 [2022-03-15 17:03:05,907 INFO L226 Difference]: Without dead ends: 21320 [2022-03-15 17:03:05,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 49 SyntacticMatches, 38 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 27665 ImplicationChecksByTransitivity, 27.2s TimeCoverageRelationStatistics Valid=9930, Invalid=46476, Unknown=0, NotChecked=0, Total=56406 [2022-03-15 17:03:05,910 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 1379 mSDsluCounter, 1059 mSDsCounter, 0 mSdLazyCounter, 2450 mSolverCounterSat, 412 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1379 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 3311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 412 IncrementalHoareTripleChecker+Valid, 2450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 449 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-15 17:03:05,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1379 Valid, 490 Invalid, 3311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [412 Valid, 2450 Invalid, 0 Unknown, 449 Unchecked, 1.2s Time] [2022-03-15 17:03:05,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21320 states. [2022-03-15 17:03:06,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21320 to 14773. [2022-03-15 17:03:06,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14773 states, 14772 states have (on average 2.437855402112104) internal successors, (36012), 14772 states have internal predecessors, (36012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:06,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14773 states to 14773 states and 36012 transitions. [2022-03-15 17:03:06,229 INFO L78 Accepts]: Start accepts. Automaton has 14773 states and 36012 transitions. Word has length 35 [2022-03-15 17:03:06,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:03:06,230 INFO L470 AbstractCegarLoop]: Abstraction has 14773 states and 36012 transitions. [2022-03-15 17:03:06,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:06,230 INFO L276 IsEmpty]: Start isEmpty. Operand 14773 states and 36012 transitions. [2022-03-15 17:03:06,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 17:03:06,246 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:03:06,246 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:03:06,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-15 17:03:06,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-15 17:03:06,462 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:03:06,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:03:06,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1746633437, now seen corresponding path program 45 times [2022-03-15 17:03:06,463 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:03:06,463 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336434477] [2022-03-15 17:03:06,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:03:06,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:03:06,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:03:06,712 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:06,712 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:03:06,712 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336434477] [2022-03-15 17:03:06,712 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336434477] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:03:06,712 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028431090] [2022-03-15 17:03:06,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:03:06,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:03:06,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:03:06,714 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:03:06,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-15 17:03:06,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 17:03:06,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:03:06,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 17:03:06,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:03:06,912 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:06,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:03:07,072 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:07,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028431090] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:03:07,072 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:03:07,072 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 34 [2022-03-15 17:03:07,072 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979970619] [2022-03-15 17:03:07,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:03:07,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 17:03:07,072 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:03:07,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 17:03:07,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=922, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 17:03:07,073 INFO L87 Difference]: Start difference. First operand 14773 states and 36012 transitions. Second operand has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 34 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:09,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:03:09,404 INFO L93 Difference]: Finished difference Result 24704 states and 59667 transitions. [2022-03-15 17:03:09,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-03-15 17:03:09,404 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 34 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 17:03:09,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:03:09,445 INFO L225 Difference]: With dead ends: 24704 [2022-03-15 17:03:09,445 INFO L226 Difference]: Without dead ends: 24291 [2022-03-15 17:03:09,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5937 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2825, Invalid=14467, Unknown=0, NotChecked=0, Total=17292 [2022-03-15 17:03:09,447 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 724 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 1625 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 1887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 1625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 17:03:09,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [724 Valid, 264 Invalid, 1887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 1625 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 17:03:09,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24291 states. [2022-03-15 17:03:09,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24291 to 18100. [2022-03-15 17:03:09,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18100 states, 18099 states have (on average 2.420188960716062) internal successors, (43803), 18099 states have internal predecessors, (43803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:09,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18100 states to 18100 states and 43803 transitions. [2022-03-15 17:03:09,835 INFO L78 Accepts]: Start accepts. Automaton has 18100 states and 43803 transitions. Word has length 35 [2022-03-15 17:03:09,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:03:09,835 INFO L470 AbstractCegarLoop]: Abstraction has 18100 states and 43803 transitions. [2022-03-15 17:03:09,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 34 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:09,835 INFO L276 IsEmpty]: Start isEmpty. Operand 18100 states and 43803 transitions. [2022-03-15 17:03:09,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 17:03:09,857 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:03:09,857 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:03:09,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-15 17:03:10,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-15 17:03:10,072 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:03:10,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:03:10,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1003263075, now seen corresponding path program 46 times [2022-03-15 17:03:10,072 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:03:10,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534178364] [2022-03-15 17:03:10,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:03:10,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:03:10,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:03:10,382 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:10,382 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:03:10,382 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534178364] [2022-03-15 17:03:10,382 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534178364] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:03:10,382 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034746331] [2022-03-15 17:03:10,382 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:03:10,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:03:10,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:03:10,383 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:03:10,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-15 17:03:10,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:03:10,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:03:10,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-15 17:03:10,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:03:11,206 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:11,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:03:11,896 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:11,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034746331] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:03:11,896 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:03:11,896 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 46 [2022-03-15 17:03:11,896 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864015275] [2022-03-15 17:03:11,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:03:11,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-15 17:03:11,897 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:03:11,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-15 17:03:11,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=1699, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 17:03:11,897 INFO L87 Difference]: Start difference. First operand 18100 states and 43803 transitions. Second operand has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:28,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:03:28,963 INFO L93 Difference]: Finished difference Result 27518 states and 64706 transitions. [2022-03-15 17:03:28,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 260 states. [2022-03-15 17:03:28,964 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 17:03:28,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:03:29,014 INFO L225 Difference]: With dead ends: 27518 [2022-03-15 17:03:29,015 INFO L226 Difference]: Without dead ends: 27191 [2022-03-15 17:03:29,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 50 SyntacticMatches, 21 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41306 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=13048, Invalid=77252, Unknown=0, NotChecked=0, Total=90300 [2022-03-15 17:03:29,020 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 1031 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 2858 mSolverCounterSat, 464 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1031 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 3887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 464 IncrementalHoareTripleChecker+Valid, 2858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 565 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-15 17:03:29,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1031 Valid, 514 Invalid, 3887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [464 Valid, 2858 Invalid, 0 Unknown, 565 Unchecked, 1.3s Time] [2022-03-15 17:03:29,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27191 states. [2022-03-15 17:03:29,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27191 to 18718. [2022-03-15 17:03:29,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18718 states, 18717 states have (on average 2.421702195864722) internal successors, (45327), 18717 states have internal predecessors, (45327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:29,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18718 states to 18718 states and 45327 transitions. [2022-03-15 17:03:29,454 INFO L78 Accepts]: Start accepts. Automaton has 18718 states and 45327 transitions. Word has length 35 [2022-03-15 17:03:29,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:03:29,454 INFO L470 AbstractCegarLoop]: Abstraction has 18718 states and 45327 transitions. [2022-03-15 17:03:29,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:29,454 INFO L276 IsEmpty]: Start isEmpty. Operand 18718 states and 45327 transitions. [2022-03-15 17:03:29,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 17:03:29,473 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:03:29,473 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:03:29,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-03-15 17:03:29,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:03:29,689 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:03:29,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:03:29,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1962410595, now seen corresponding path program 47 times [2022-03-15 17:03:29,690 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:03:29,690 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052080828] [2022-03-15 17:03:29,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:03:29,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:03:29,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:03:29,985 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:29,985 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:03:29,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052080828] [2022-03-15 17:03:29,985 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052080828] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:03:29,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593329317] [2022-03-15 17:03:29,986 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 17:03:29,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:03:29,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:03:29,987 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:03:29,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-15 17:03:30,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 17:03:30,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:03:30,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-15 17:03:30,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:03:30,597 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:30,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:03:31,094 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:31,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593329317] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:03:31,094 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:03:31,094 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 46 [2022-03-15 17:03:31,094 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512399697] [2022-03-15 17:03:31,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:03:31,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-15 17:03:31,095 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:03:31,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-15 17:03:31,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1701, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 17:03:31,095 INFO L87 Difference]: Start difference. First operand 18718 states and 45327 transitions. Second operand has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:42,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:03:42,315 INFO L93 Difference]: Finished difference Result 27149 states and 64467 transitions. [2022-03-15 17:03:42,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2022-03-15 17:03:42,316 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 17:03:42,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:03:42,368 INFO L225 Difference]: With dead ends: 27149 [2022-03-15 17:03:42,368 INFO L226 Difference]: Without dead ends: 26998 [2022-03-15 17:03:42,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 50 SyntacticMatches, 27 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27364 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=9504, Invalid=48818, Unknown=0, NotChecked=0, Total=58322 [2022-03-15 17:03:42,372 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 841 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 2224 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 3393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 2224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 808 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 17:03:42,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [841 Valid, 396 Invalid, 3393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 2224 Invalid, 0 Unknown, 808 Unchecked, 1.0s Time] [2022-03-15 17:03:42,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26998 states. [2022-03-15 17:03:42,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26998 to 19461. [2022-03-15 17:03:42,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19461 states, 19460 states have (on average 2.4192702980472767) internal successors, (47079), 19460 states have internal predecessors, (47079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:42,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19461 states to 19461 states and 47079 transitions. [2022-03-15 17:03:42,860 INFO L78 Accepts]: Start accepts. Automaton has 19461 states and 47079 transitions. Word has length 35 [2022-03-15 17:03:42,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:03:42,860 INFO L470 AbstractCegarLoop]: Abstraction has 19461 states and 47079 transitions. [2022-03-15 17:03:42,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:03:42,860 INFO L276 IsEmpty]: Start isEmpty. Operand 19461 states and 47079 transitions. [2022-03-15 17:03:42,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 17:03:42,880 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:03:42,880 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:03:42,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-03-15 17:03:43,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-15 17:03:43,096 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:03:43,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:03:43,097 INFO L85 PathProgramCache]: Analyzing trace with hash 893229107, now seen corresponding path program 48 times [2022-03-15 17:03:43,097 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:03:43,097 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298602986] [2022-03-15 17:03:43,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:03:43,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:03:43,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:03:43,402 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:43,402 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:03:43,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298602986] [2022-03-15 17:03:43,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298602986] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:03:43,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163872579] [2022-03-15 17:03:43,402 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 17:03:43,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:03:43,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:03:43,412 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:03:43,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-15 17:03:43,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 17:03:43,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:03:43,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-15 17:03:43,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:03:44,322 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:44,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:03:46,031 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:03:46,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163872579] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:03:46,032 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:03:46,032 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 18] total 47 [2022-03-15 17:03:46,032 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081231825] [2022-03-15 17:03:46,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:03:46,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-15 17:03:46,032 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:03:46,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-15 17:03:46,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=1796, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 17:03:46,033 INFO L87 Difference]: Start difference. First operand 19461 states and 47079 transitions. Second operand has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:20,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:04:20,488 INFO L93 Difference]: Finished difference Result 42567 states and 102196 transitions. [2022-03-15 17:04:20,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 253 states. [2022-03-15 17:04:20,488 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 17:04:20,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:04:20,555 INFO L225 Difference]: With dead ends: 42567 [2022-03-15 17:04:20,555 INFO L226 Difference]: Without dead ends: 42462 [2022-03-15 17:04:20,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 35066 ImplicationChecksByTransitivity, 34.0s TimeCoverageRelationStatistics Valid=12667, Invalid=68843, Unknown=0, NotChecked=0, Total=81510 [2022-03-15 17:04:20,568 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 969 mSDsluCounter, 997 mSDsCounter, 0 mSdLazyCounter, 2170 mSolverCounterSat, 460 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 969 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 3326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 460 IncrementalHoareTripleChecker+Valid, 2170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 696 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-15 17:04:20,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [969 Valid, 459 Invalid, 3326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [460 Valid, 2170 Invalid, 0 Unknown, 696 Unchecked, 1.1s Time] [2022-03-15 17:04:20,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42462 states. [2022-03-15 17:04:21,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42462 to 20181. [2022-03-15 17:04:21,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20181 states, 20180 states have (on average 2.415312190287413) internal successors, (48741), 20180 states have internal predecessors, (48741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:21,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20181 states to 20181 states and 48741 transitions. [2022-03-15 17:04:21,110 INFO L78 Accepts]: Start accepts. Automaton has 20181 states and 48741 transitions. Word has length 35 [2022-03-15 17:04:21,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:04:21,110 INFO L470 AbstractCegarLoop]: Abstraction has 20181 states and 48741 transitions. [2022-03-15 17:04:21,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:21,111 INFO L276 IsEmpty]: Start isEmpty. Operand 20181 states and 48741 transitions. [2022-03-15 17:04:21,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 17:04:21,129 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:04:21,129 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:04:21,145 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-03-15 17:04:21,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-15 17:04:21,343 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:04:21,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:04:21,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1057414301, now seen corresponding path program 49 times [2022-03-15 17:04:21,344 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:04:21,344 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731677328] [2022-03-15 17:04:21,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:04:21,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:04:21,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:04:21,642 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:21,642 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:04:21,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731677328] [2022-03-15 17:04:21,642 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731677328] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:04:21,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652837757] [2022-03-15 17:04:21,642 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 17:04:21,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:04:21,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:04:21,644 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:04:21,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-15 17:04:21,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:04:21,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-15 17:04:21,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:04:22,523 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:22,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:04:23,080 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:23,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652837757] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:04:23,081 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:04:23,081 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 45 [2022-03-15 17:04:23,081 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143810881] [2022-03-15 17:04:23,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:04:23,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-15 17:04:23,081 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:04:23,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-15 17:04:23,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=1608, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 17:04:23,082 INFO L87 Difference]: Start difference. First operand 20181 states and 48741 transitions. Second operand has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 45 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:35,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:04:35,995 INFO L93 Difference]: Finished difference Result 31595 states and 75036 transitions. [2022-03-15 17:04:35,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 231 states. [2022-03-15 17:04:35,996 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 45 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 17:04:35,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:04:36,054 INFO L225 Difference]: With dead ends: 31595 [2022-03-15 17:04:36,054 INFO L226 Difference]: Without dead ends: 31391 [2022-03-15 17:04:36,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 58 SyntacticMatches, 14 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30424 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=10357, Invalid=57503, Unknown=0, NotChecked=0, Total=67860 [2022-03-15 17:04:36,057 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 948 mSDsluCounter, 1192 mSDsCounter, 0 mSdLazyCounter, 2598 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 948 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 3485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 2598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 528 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-15 17:04:36,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [948 Valid, 634 Invalid, 3485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 2598 Invalid, 0 Unknown, 528 Unchecked, 1.1s Time] [2022-03-15 17:04:36,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31391 states. [2022-03-15 17:04:36,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31391 to 20619. [2022-03-15 17:04:36,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20619 states, 20618 states have (on average 2.412212629741003) internal successors, (49735), 20618 states have internal predecessors, (49735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:36,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20619 states to 20619 states and 49735 transitions. [2022-03-15 17:04:36,510 INFO L78 Accepts]: Start accepts. Automaton has 20619 states and 49735 transitions. Word has length 35 [2022-03-15 17:04:36,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:04:36,510 INFO L470 AbstractCegarLoop]: Abstraction has 20619 states and 49735 transitions. [2022-03-15 17:04:36,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 45 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:36,510 INFO L276 IsEmpty]: Start isEmpty. Operand 20619 states and 49735 transitions. [2022-03-15 17:04:36,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 17:04:36,532 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:04:36,532 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:04:36,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-15 17:04:36,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:04:36,747 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:04:36,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:04:36,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1794931811, now seen corresponding path program 50 times [2022-03-15 17:04:36,748 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:04:36,748 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303410193] [2022-03-15 17:04:36,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:04:36,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:04:36,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:04:37,005 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:37,005 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:04:37,005 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303410193] [2022-03-15 17:04:37,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303410193] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:04:37,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161332116] [2022-03-15 17:04:37,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:04:37,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:04:37,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:04:37,012 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:04:37,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-15 17:04:37,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:04:37,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:04:37,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 17:04:37,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:04:37,743 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:37,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:04:38,748 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:38,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161332116] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:04:38,748 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:04:38,748 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 17] total 41 [2022-03-15 17:04:38,748 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930523617] [2022-03-15 17:04:38,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:04:38,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-15 17:04:38,748 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:04:38,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-15 17:04:38,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=1377, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 17:04:38,749 INFO L87 Difference]: Start difference. First operand 20619 states and 49735 transitions. Second operand has 42 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:45,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:04:45,036 INFO L93 Difference]: Finished difference Result 31800 states and 75366 transitions. [2022-03-15 17:04:45,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-03-15 17:04:45,037 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 17:04:45,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:04:45,095 INFO L225 Difference]: With dead ends: 31800 [2022-03-15 17:04:45,095 INFO L226 Difference]: Without dead ends: 31773 [2022-03-15 17:04:45,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8298 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=4887, Invalid=17165, Unknown=0, NotChecked=0, Total=22052 [2022-03-15 17:04:45,097 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 700 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 1828 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 2075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 1828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 17:04:45,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 328 Invalid, 2075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 1828 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 17:04:45,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31773 states. [2022-03-15 17:04:45,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31773 to 24756. [2022-03-15 17:04:45,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24756 states, 24755 states have (on average 2.4244395071702685) internal successors, (60017), 24755 states have internal predecessors, (60017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:45,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24756 states to 24756 states and 60017 transitions. [2022-03-15 17:04:45,584 INFO L78 Accepts]: Start accepts. Automaton has 24756 states and 60017 transitions. Word has length 35 [2022-03-15 17:04:45,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:04:45,584 INFO L470 AbstractCegarLoop]: Abstraction has 24756 states and 60017 transitions. [2022-03-15 17:04:45,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:45,584 INFO L276 IsEmpty]: Start isEmpty. Operand 24756 states and 60017 transitions. [2022-03-15 17:04:45,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 17:04:45,606 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:04:45,606 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:04:45,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-15 17:04:45,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-03-15 17:04:45,819 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:04:45,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:04:45,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1064565901, now seen corresponding path program 51 times [2022-03-15 17:04:45,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:04:45,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431401230] [2022-03-15 17:04:45,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:04:45,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:04:45,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:04:46,014 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:46,014 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:04:46,014 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431401230] [2022-03-15 17:04:46,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431401230] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:04:46,014 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688967865] [2022-03-15 17:04:46,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:04:46,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:04:46,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:04:46,016 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:04:46,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-15 17:04:46,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-15 17:04:46,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:04:46,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 17:04:46,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:04:46,753 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:46,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:04:47,766 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:47,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688967865] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:04:47,767 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:04:47,767 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 16] total 39 [2022-03-15 17:04:47,767 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37552048] [2022-03-15 17:04:47,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:04:47,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-15 17:04:47,767 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:04:47,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-15 17:04:47,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=1189, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 17:04:47,768 INFO L87 Difference]: Start difference. First operand 24756 states and 60017 transitions. Second operand has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 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) [2022-03-15 17:04:51,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:04:51,007 INFO L93 Difference]: Finished difference Result 33437 states and 81132 transitions. [2022-03-15 17:04:51,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-15 17:04:51,008 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 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) Word has length 35 [2022-03-15 17:04:51,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:04:51,093 INFO L225 Difference]: With dead ends: 33437 [2022-03-15 17:04:51,094 INFO L226 Difference]: Without dead ends: 33429 [2022-03-15 17:04:51,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3962 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3179, Invalid=8811, Unknown=0, NotChecked=0, Total=11990 [2022-03-15 17:04:51,095 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 370 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 1501 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 1701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 1501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 17:04:51,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 178 Invalid, 1701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 1501 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 17:04:51,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33429 states. [2022-03-15 17:04:51,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33429 to 28374. [2022-03-15 17:04:51,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28374 states, 28373 states have (on average 2.445775913720791) internal successors, (69394), 28373 states have internal predecessors, (69394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:04:51,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28374 states to 28374 states and 69394 transitions. [2022-03-15 17:04:51,681 INFO L78 Accepts]: Start accepts. Automaton has 28374 states and 69394 transitions. Word has length 35 [2022-03-15 17:04:51,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:04:51,682 INFO L470 AbstractCegarLoop]: Abstraction has 28374 states and 69394 transitions. [2022-03-15 17:04:51,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 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) [2022-03-15 17:04:51,682 INFO L276 IsEmpty]: Start isEmpty. Operand 28374 states and 69394 transitions. [2022-03-15 17:04:51,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 17:04:51,705 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:04:51,705 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:04:51,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-15 17:04:51,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:04:51,921 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:04:51,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:04:51,922 INFO L85 PathProgramCache]: Analyzing trace with hash -968336091, now seen corresponding path program 52 times [2022-03-15 17:04:51,922 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:04:51,922 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034531962] [2022-03-15 17:04:51,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:04:51,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:04:51,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:04:52,213 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:52,213 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:04:52,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034531962] [2022-03-15 17:04:52,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034531962] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:04:52,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336855547] [2022-03-15 17:04:52,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:04:52,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:04:52,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:04:52,224 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:04:52,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-15 17:04:52,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:04:52,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:04:52,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-15 17:04:52,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:04:53,065 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:53,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:04:54,710 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:04:54,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336855547] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:04:54,711 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:04:54,711 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 18] total 46 [2022-03-15 17:04:54,711 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090173169] [2022-03-15 17:04:54,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:04:54,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-15 17:04:54,711 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:04:54,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-15 17:04:54,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=1683, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 17:04:54,712 INFO L87 Difference]: Start difference. First operand 28374 states and 69394 transitions. Second operand has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:51,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:05:51,425 INFO L93 Difference]: Finished difference Result 76564 states and 186438 transitions. [2022-03-15 17:05:51,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 380 states. [2022-03-15 17:05:51,426 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 17:05:51,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:05:51,777 INFO L225 Difference]: With dead ends: 76564 [2022-03-15 17:05:51,777 INFO L226 Difference]: Without dead ends: 76431 [2022-03-15 17:05:51,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 408 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 78772 ImplicationChecksByTransitivity, 55.3s TimeCoverageRelationStatistics Valid=24736, Invalid=142954, Unknown=0, NotChecked=0, Total=167690 [2022-03-15 17:05:51,790 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 1220 mSDsluCounter, 1649 mSDsCounter, 0 mSdLazyCounter, 3390 mSolverCounterSat, 527 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1220 SdHoareTripleChecker+Valid, 864 SdHoareTripleChecker+Invalid, 5025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 527 IncrementalHoareTripleChecker+Valid, 3390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1108 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:05:51,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1220 Valid, 864 Invalid, 5025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [527 Valid, 3390 Invalid, 0 Unknown, 1108 Unchecked, 1.7s Time] [2022-03-15 17:05:51,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76431 states. [2022-03-15 17:05:52,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76431 to 35789. [2022-03-15 17:05:52,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35789 states, 35788 states have (on average 2.447831675421929) internal successors, (87603), 35788 states have internal predecessors, (87603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:53,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35789 states to 35789 states and 87603 transitions. [2022-03-15 17:05:53,020 INFO L78 Accepts]: Start accepts. Automaton has 35789 states and 87603 transitions. Word has length 35 [2022-03-15 17:05:53,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:05:53,020 INFO L470 AbstractCegarLoop]: Abstraction has 35789 states and 87603 transitions. [2022-03-15 17:05:53,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:05:53,021 INFO L276 IsEmpty]: Start isEmpty. Operand 35789 states and 87603 transitions. [2022-03-15 17:05:53,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 17:05:53,049 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:05:53,049 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:05:53,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-15 17:05:53,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-03-15 17:05:53,265 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:05:53,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:05:53,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1472113377, now seen corresponding path program 53 times [2022-03-15 17:05:53,266 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:05:53,266 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605290406] [2022-03-15 17:05:53,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:05:53,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:05:53,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:05:53,536 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:53,536 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:05:53,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605290406] [2022-03-15 17:05:53,536 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605290406] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:05:53,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978188726] [2022-03-15 17:05:53,536 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 17:05:53,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:05:53,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:05:53,544 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:05:53,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-15 17:05:53,571 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-15 17:05:53,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:05:53,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 17:05:53,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:05:54,043 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:54,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:05:54,886 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:05:54,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978188726] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:05:54,886 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:05:54,886 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 39 [2022-03-15 17:05:54,886 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253907614] [2022-03-15 17:05:54,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:05:54,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-15 17:05:54,887 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:05:54,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-15 17:05:54,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1267, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 17:05:54,889 INFO L87 Difference]: Start difference. First operand 35789 states and 87603 transitions. Second operand has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:04,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:06:04,873 INFO L93 Difference]: Finished difference Result 51166 states and 123889 transitions. [2022-03-15 17:06:04,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2022-03-15 17:06:04,873 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 17:06:04,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:06:04,994 INFO L225 Difference]: With dead ends: 51166 [2022-03-15 17:06:04,994 INFO L226 Difference]: Without dead ends: 50956 [2022-03-15 17:06:05,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16625 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=5587, Invalid=37885, Unknown=0, NotChecked=0, Total=43472 [2022-03-15 17:06:05,063 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1183 mSDsluCounter, 1003 mSDsCounter, 0 mSdLazyCounter, 2724 mSolverCounterSat, 521 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1183 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 3245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 521 IncrementalHoareTripleChecker+Valid, 2724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-15 17:06:05,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1183 Valid, 567 Invalid, 3245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [521 Valid, 2724 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-15 17:06:05,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50956 states. [2022-03-15 17:06:05,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50956 to 37796. [2022-03-15 17:06:05,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37796 states, 37795 states have (on average 2.4284164572033338) internal successors, (91782), 37795 states have internal predecessors, (91782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:05,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37796 states to 37796 states and 91782 transitions. [2022-03-15 17:06:05,977 INFO L78 Accepts]: Start accepts. Automaton has 37796 states and 91782 transitions. Word has length 35 [2022-03-15 17:06:05,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:06:05,977 INFO L470 AbstractCegarLoop]: Abstraction has 37796 states and 91782 transitions. [2022-03-15 17:06:05,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:06:05,977 INFO L276 IsEmpty]: Start isEmpty. Operand 37796 states and 91782 transitions. [2022-03-15 17:06:06,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 17:06:06,009 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:06:06,009 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:06:06,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-15 17:06:06,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-03-15 17:06:06,225 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:06:06,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:06:06,226 INFO L85 PathProgramCache]: Analyzing trace with hash 309882039, now seen corresponding path program 54 times [2022-03-15 17:06:06,226 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:06:06,226 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436251858] [2022-03-15 17:06:06,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:06:06,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:06:06,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:06:06,550 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:06,550 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:06:06,550 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436251858] [2022-03-15 17:06:06,550 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436251858] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:06:06,550 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215892574] [2022-03-15 17:06:06,550 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 17:06:06,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:06:06,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:06:06,552 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:06:06,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-15 17:06:06,578 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 17:06:06,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:06:06,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-15 17:06:06,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:06:07,289 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:07,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:06:09,148 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:06:09,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215892574] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:06:09,149 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:06:09,149 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 18] total 47 [2022-03-15 17:06:09,149 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843829425] [2022-03-15 17:06:09,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:06:09,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-15 17:06:09,149 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:06:09,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-15 17:06:09,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=1806, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 17:06:09,152 INFO L87 Difference]: Start difference. First operand 37796 states and 91782 transitions. Second operand has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:01,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:07:01,360 INFO L93 Difference]: Finished difference Result 64315 states and 154824 transitions. [2022-03-15 17:07:01,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 392 states. [2022-03-15 17:07:01,361 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 17:07:01,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:07:01,517 INFO L225 Difference]: With dead ends: 64315 [2022-03-15 17:07:01,518 INFO L226 Difference]: Without dead ends: 64110 [2022-03-15 17:07:01,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 432 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 88058 ImplicationChecksByTransitivity, 50.8s TimeCoverageRelationStatistics Valid=25719, Invalid=162203, Unknown=0, NotChecked=0, Total=187922 [2022-03-15 17:07:01,526 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 1339 mSDsluCounter, 1569 mSDsCounter, 0 mSdLazyCounter, 3555 mSolverCounterSat, 623 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1339 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 4669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 623 IncrementalHoareTripleChecker+Valid, 3555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 491 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-15 17:07:01,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1339 Valid, 896 Invalid, 4669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [623 Valid, 3555 Invalid, 0 Unknown, 491 Unchecked, 1.9s Time] [2022-03-15 17:07:01,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64110 states. [2022-03-15 17:07:02,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64110 to 42957. [2022-03-15 17:07:02,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42957 states, 42956 states have (on average 2.432582177111463) internal successors, (104494), 42956 states have internal predecessors, (104494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:02,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42957 states to 42957 states and 104494 transitions. [2022-03-15 17:07:02,610 INFO L78 Accepts]: Start accepts. Automaton has 42957 states and 104494 transitions. Word has length 35 [2022-03-15 17:07:02,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:07:02,610 INFO L470 AbstractCegarLoop]: Abstraction has 42957 states and 104494 transitions. [2022-03-15 17:07:02,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:02,611 INFO L276 IsEmpty]: Start isEmpty. Operand 42957 states and 104494 transitions. [2022-03-15 17:07:02,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 17:07:02,647 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:07:02,647 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:07:02,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-15 17:07:02,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:07:02,863 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:07:02,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:07:02,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1619435289, now seen corresponding path program 55 times [2022-03-15 17:07:02,863 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:07:02,863 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77650924] [2022-03-15 17:07:02,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:07:02,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:07:02,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:07:03,420 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 17:07:03,421 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:07:03,421 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77650924] [2022-03-15 17:07:03,421 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77650924] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:07:03,421 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358367358] [2022-03-15 17:07:03,421 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 17:07:03,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:07:03,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:07:03,422 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:07:03,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-15 17:07:03,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:07:03,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-15 17:07:03,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:07:04,238 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:04,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:07:04,804 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:04,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358367358] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:07:04,805 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:07:04,805 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 44 [2022-03-15 17:07:04,805 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779065554] [2022-03-15 17:07:04,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:07:04,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-15 17:07:04,805 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:07:04,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-15 17:07:04,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=1536, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 17:07:04,806 INFO L87 Difference]: Start difference. First operand 42957 states and 104494 transitions. Second operand has 44 states, 44 states have (on average 2.1363636363636362) internal successors, (94), 44 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:16,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:07:16,972 INFO L93 Difference]: Finished difference Result 64001 states and 154506 transitions. [2022-03-15 17:07:16,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 231 states. [2022-03-15 17:07:16,972 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1363636363636362) internal successors, (94), 44 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 17:07:16,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:07:17,124 INFO L225 Difference]: With dead ends: 64001 [2022-03-15 17:07:17,125 INFO L226 Difference]: Without dead ends: 63813 [2022-03-15 17:07:17,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 55 SyntacticMatches, 13 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29257 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=10278, Invalid=57062, Unknown=0, NotChecked=0, Total=67340 [2022-03-15 17:07:17,128 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 710 mSDsluCounter, 998 mSDsCounter, 0 mSdLazyCounter, 2564 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 710 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 3588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 2564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 750 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 17:07:17,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [710 Valid, 473 Invalid, 3588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 2564 Invalid, 0 Unknown, 750 Unchecked, 1.0s Time] [2022-03-15 17:07:17,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63813 states. [2022-03-15 17:07:18,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63813 to 43034. [2022-03-15 17:07:18,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43034 states, 43033 states have (on average 2.4317849092556876) internal successors, (104647), 43033 states have internal predecessors, (104647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:18,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43034 states to 43034 states and 104647 transitions. [2022-03-15 17:07:18,284 INFO L78 Accepts]: Start accepts. Automaton has 43034 states and 104647 transitions. Word has length 35 [2022-03-15 17:07:18,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:07:18,284 INFO L470 AbstractCegarLoop]: Abstraction has 43034 states and 104647 transitions. [2022-03-15 17:07:18,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.1363636363636362) internal successors, (94), 44 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:18,284 INFO L276 IsEmpty]: Start isEmpty. Operand 43034 states and 104647 transitions. [2022-03-15 17:07:18,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 17:07:18,321 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:07:18,321 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:07:18,338 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-03-15 17:07:18,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:07:18,529 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:07:18,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:07:18,529 INFO L85 PathProgramCache]: Analyzing trace with hash 830358429, now seen corresponding path program 56 times [2022-03-15 17:07:18,529 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:07:18,529 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351286829] [2022-03-15 17:07:18,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:07:18,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:07:18,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:07:18,723 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 17:07:18,723 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:07:18,723 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351286829] [2022-03-15 17:07:18,723 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351286829] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:07:18,723 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218751037] [2022-03-15 17:07:18,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:07:18,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:07:18,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:07:18,724 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:07:18,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-15 17:07:18,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:07:18,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:07:18,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-15 17:07:18,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:07:19,525 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:19,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:07:20,027 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 5 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:20,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218751037] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:07:20,027 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:07:20,027 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 44 [2022-03-15 17:07:20,028 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796403086] [2022-03-15 17:07:20,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:07:20,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-15 17:07:20,028 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:07:20,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-15 17:07:20,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=1540, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 17:07:20,028 INFO L87 Difference]: Start difference. First operand 43034 states and 104647 transitions. Second operand has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 44 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:35,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:07:35,365 INFO L93 Difference]: Finished difference Result 58311 states and 140194 transitions. [2022-03-15 17:07:35,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 235 states. [2022-03-15 17:07:35,365 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 44 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 17:07:35,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:07:35,510 INFO L225 Difference]: With dead ends: 58311 [2022-03-15 17:07:35,510 INFO L226 Difference]: Without dead ends: 58065 [2022-03-15 17:07:35,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 54 SyntacticMatches, 19 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34136 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=11952, Invalid=62850, Unknown=0, NotChecked=0, Total=74802 [2022-03-15 17:07:35,513 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 914 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 2914 mSolverCounterSat, 412 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 914 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 4127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 412 IncrementalHoareTripleChecker+Valid, 2914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 801 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-15 17:07:35,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [914 Valid, 422 Invalid, 4127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [412 Valid, 2914 Invalid, 0 Unknown, 801 Unchecked, 1.3s Time] [2022-03-15 17:07:35,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58065 states. [2022-03-15 17:07:36,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58065 to 43495. [2022-03-15 17:07:36,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43495 states, 43494 states have (on average 2.4314388191474685) internal successors, (105753), 43494 states have internal predecessors, (105753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:36,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43495 states to 43495 states and 105753 transitions. [2022-03-15 17:07:36,810 INFO L78 Accepts]: Start accepts. Automaton has 43495 states and 105753 transitions. Word has length 35 [2022-03-15 17:07:36,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:07:36,810 INFO L470 AbstractCegarLoop]: Abstraction has 43495 states and 105753 transitions. [2022-03-15 17:07:36,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 44 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:07:36,811 INFO L276 IsEmpty]: Start isEmpty. Operand 43495 states and 105753 transitions. [2022-03-15 17:07:36,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 17:07:36,845 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:07:36,845 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:07:36,862 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-03-15 17:07:37,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:07:37,062 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:07:37,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:07:37,063 INFO L85 PathProgramCache]: Analyzing trace with hash 571032451, now seen corresponding path program 57 times [2022-03-15 17:07:37,063 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:07:37,063 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859342153] [2022-03-15 17:07:37,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:07:37,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:07:37,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:07:37,363 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 17:07:37,364 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:07:37,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859342153] [2022-03-15 17:07:37,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859342153] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:07:37,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536029530] [2022-03-15 17:07:37,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:07:37,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:07:37,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:07:37,365 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:07:37,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-15 17:07:37,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-15 17:07:37,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:07:37,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-15 17:07:37,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:07:38,048 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:38,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:07:39,739 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:07:39,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536029530] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:07:39,739 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:07:39,739 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 18] total 44 [2022-03-15 17:07:39,756 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457621663] [2022-03-15 17:07:39,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:07:39,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-15 17:07:39,757 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:07:39,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-15 17:07:39,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=1528, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 17:07:39,757 INFO L87 Difference]: Start difference. First operand 43495 states and 105753 transitions. Second operand has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:00,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:08:00,773 INFO L93 Difference]: Finished difference Result 64315 states and 154285 transitions. [2022-03-15 17:08:00,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 217 states. [2022-03-15 17:08:00,773 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 17:08:00,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:08:00,989 INFO L225 Difference]: With dead ends: 64315 [2022-03-15 17:08:00,989 INFO L226 Difference]: Without dead ends: 64204 [2022-03-15 17:08:00,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 27112 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=11215, Invalid=54065, Unknown=0, NotChecked=0, Total=65280 [2022-03-15 17:08:00,993 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 999 mSDsluCounter, 1397 mSDsCounter, 0 mSdLazyCounter, 3569 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 999 SdHoareTripleChecker+Valid, 825 SdHoareTripleChecker+Invalid, 4074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 3569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:08:00,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [999 Valid, 825 Invalid, 4074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 3569 Invalid, 0 Unknown, 133 Unchecked, 1.7s Time] [2022-03-15 17:08:01,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64204 states. [2022-03-15 17:08:01,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64204 to 44494. [2022-03-15 17:08:01,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44494 states, 44493 states have (on average 2.4320454903018454) internal successors, (108209), 44493 states have internal predecessors, (108209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:02,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44494 states to 44494 states and 108209 transitions. [2022-03-15 17:08:02,255 INFO L78 Accepts]: Start accepts. Automaton has 44494 states and 108209 transitions. Word has length 35 [2022-03-15 17:08:02,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:08:02,255 INFO L470 AbstractCegarLoop]: Abstraction has 44494 states and 108209 transitions. [2022-03-15 17:08:02,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:02,259 INFO L276 IsEmpty]: Start isEmpty. Operand 44494 states and 108209 transitions. [2022-03-15 17:08:02,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 17:08:02,289 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:08:02,290 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:08:02,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-15 17:08:02,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-15 17:08:02,496 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:08:02,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:08:02,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1391448127, now seen corresponding path program 58 times [2022-03-15 17:08:02,496 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:08:02,496 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714883150] [2022-03-15 17:08:02,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:08:02,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:08:02,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:08:02,937 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:02,938 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:08:02,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714883150] [2022-03-15 17:08:02,938 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714883150] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:08:02,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687766965] [2022-03-15 17:08:02,938 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 17:08:02,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:08:02,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:08:02,939 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:08:02,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-15 17:08:02,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 17:08:02,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:08:02,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-15 17:08:02,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:08:03,900 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:03,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:08:05,525 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:05,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687766965] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:08:05,525 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:08:05,525 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 18] total 45 [2022-03-15 17:08:05,525 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380928479] [2022-03-15 17:08:05,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:08:05,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-15 17:08:05,526 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:08:05,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-15 17:08:05,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=1616, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 17:08:05,526 INFO L87 Difference]: Start difference. First operand 44494 states and 108209 transitions. Second operand has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 45 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:35,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:08:35,121 INFO L93 Difference]: Finished difference Result 64559 states and 154907 transitions. [2022-03-15 17:08:35,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 273 states. [2022-03-15 17:08:35,121 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 45 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 17:08:35,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:08:35,285 INFO L225 Difference]: With dead ends: 64559 [2022-03-15 17:08:35,285 INFO L226 Difference]: Without dead ends: 64412 [2022-03-15 17:08:35,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 65 SyntacticMatches, 8 SemanticMatches, 311 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 42426 ImplicationChecksByTransitivity, 28.3s TimeCoverageRelationStatistics Valid=14902, Invalid=82754, Unknown=0, NotChecked=0, Total=97656 [2022-03-15 17:08:35,289 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 1005 mSDsluCounter, 1861 mSDsCounter, 0 mSdLazyCounter, 3538 mSolverCounterSat, 452 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1005 SdHoareTripleChecker+Valid, 997 SdHoareTripleChecker+Invalid, 4517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 452 IncrementalHoareTripleChecker+Valid, 3538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 527 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:08:35,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1005 Valid, 997 Invalid, 4517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [452 Valid, 3538 Invalid, 0 Unknown, 527 Unchecked, 1.7s Time] [2022-03-15 17:08:35,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64412 states. [2022-03-15 17:08:36,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64412 to 43889. [2022-03-15 17:08:36,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43889 states, 43888 states have (on average 2.428545388261028) internal successors, (106584), 43888 states have internal predecessors, (106584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:36,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43889 states to 43889 states and 106584 transitions. [2022-03-15 17:08:36,471 INFO L78 Accepts]: Start accepts. Automaton has 43889 states and 106584 transitions. Word has length 35 [2022-03-15 17:08:36,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:08:36,472 INFO L470 AbstractCegarLoop]: Abstraction has 43889 states and 106584 transitions. [2022-03-15 17:08:36,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 45 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:08:36,472 INFO L276 IsEmpty]: Start isEmpty. Operand 43889 states and 106584 transitions. [2022-03-15 17:08:36,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 17:08:36,507 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:08:36,507 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:08:36,523 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-03-15 17:08:36,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-15 17:08:36,711 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:08:36,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:08:36,711 INFO L85 PathProgramCache]: Analyzing trace with hash -273268249, now seen corresponding path program 59 times [2022-03-15 17:08:36,711 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:08:36,711 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062037067] [2022-03-15 17:08:36,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:08:36,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:08:36,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:08:37,175 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:37,175 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:08:37,175 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062037067] [2022-03-15 17:08:37,175 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062037067] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:08:37,175 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859390165] [2022-03-15 17:08:37,175 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 17:08:37,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:08:37,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:08:37,178 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:08:37,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-15 17:08:37,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-15 17:08:37,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:08:37,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 17:08:37,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:08:38,108 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:38,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:08:40,152 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:08:40,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859390165] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:08:40,152 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:08:40,152 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 18] total 46 [2022-03-15 17:08:40,152 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723708972] [2022-03-15 17:08:40,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:08:40,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-15 17:08:40,153 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:08:40,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-15 17:08:40,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=1838, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 17:08:40,153 INFO L87 Difference]: Start difference. First operand 43889 states and 106584 transitions. Second operand has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:09:39,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:09:39,691 INFO L93 Difference]: Finished difference Result 74873 states and 178635 transitions. [2022-03-15 17:09:39,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 394 states. [2022-03-15 17:09:39,691 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 17:09:39,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:09:39,827 INFO L225 Difference]: With dead ends: 74873 [2022-03-15 17:09:39,827 INFO L226 Difference]: Without dead ends: 74496 [2022-03-15 17:09:39,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 45 SyntacticMatches, 34 SemanticMatches, 434 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 92189 ImplicationChecksByTransitivity, 58.1s TimeCoverageRelationStatistics Valid=22065, Invalid=167595, Unknown=0, NotChecked=0, Total=189660 [2022-03-15 17:09:39,836 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 1741 mSDsluCounter, 2144 mSDsCounter, 0 mSdLazyCounter, 4354 mSolverCounterSat, 666 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1741 SdHoareTripleChecker+Valid, 1202 SdHoareTripleChecker+Invalid, 5245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 666 IncrementalHoareTripleChecker+Valid, 4354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 225 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-15 17:09:39,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1741 Valid, 1202 Invalid, 5245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [666 Valid, 4354 Invalid, 0 Unknown, 225 Unchecked, 2.2s Time] [2022-03-15 17:09:39,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74496 states. [2022-03-15 17:09:40,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74496 to 45129. [2022-03-15 17:09:40,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45129 states, 45128 states have (on average 2.431328665130296) internal successors, (109721), 45128 states have internal predecessors, (109721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:09:40,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45129 states to 45129 states and 109721 transitions. [2022-03-15 17:09:40,942 INFO L78 Accepts]: Start accepts. Automaton has 45129 states and 109721 transitions. Word has length 35 [2022-03-15 17:09:40,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:09:40,942 INFO L470 AbstractCegarLoop]: Abstraction has 45129 states and 109721 transitions. [2022-03-15 17:09:40,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:09:40,942 INFO L276 IsEmpty]: Start isEmpty. Operand 45129 states and 109721 transitions. [2022-03-15 17:09:40,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 17:09:40,974 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:09:40,974 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:09:40,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-15 17:09:41,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:09:41,175 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:09:41,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:09:41,176 INFO L85 PathProgramCache]: Analyzing trace with hash -521560789, now seen corresponding path program 60 times [2022-03-15 17:09:41,176 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:09:41,176 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101755610] [2022-03-15 17:09:41,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:09:41,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:09:41,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:09:41,528 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 17:09:41,528 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:09:41,528 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101755610] [2022-03-15 17:09:41,528 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101755610] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:09:41,528 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667611087] [2022-03-15 17:09:41,528 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 17:09:41,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:09:41,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:09:41,529 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:09:41,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-15 17:09:41,561 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-15 17:09:41,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:09:41,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 17:09:41,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:09:42,305 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:09:42,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:09:43,018 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:09:43,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667611087] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:09:43,019 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:09:43,019 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 40 [2022-03-15 17:09:43,019 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549122537] [2022-03-15 17:09:43,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:09:43,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 17:09:43,019 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:09:43,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 17:09:43,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=1307, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 17:09:43,020 INFO L87 Difference]: Start difference. First operand 45129 states and 109721 transitions. Second operand has 41 states, 41 states have (on average 2.1951219512195124) internal successors, (90), 40 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:09:47,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:09:47,329 INFO L93 Difference]: Finished difference Result 55955 states and 135064 transitions. [2022-03-15 17:09:47,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-15 17:09:47,329 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1951219512195124) internal successors, (90), 40 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 17:09:47,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:09:47,435 INFO L225 Difference]: With dead ends: 55955 [2022-03-15 17:09:47,435 INFO L226 Difference]: Without dead ends: 55934 [2022-03-15 17:09:47,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5087 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3347, Invalid=10695, Unknown=0, NotChecked=0, Total=14042 [2022-03-15 17:09:47,436 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 575 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 1517 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 1766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 1517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:09:47,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [575 Valid, 271 Invalid, 1766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 1517 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 17:09:47,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55934 states. [2022-03-15 17:09:48,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55934 to 49062. [2022-03-15 17:09:48,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49062 states, 49061 states have (on average 2.435865555125252) internal successors, (119506), 49061 states have internal predecessors, (119506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:09:48,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49062 states to 49062 states and 119506 transitions. [2022-03-15 17:09:48,580 INFO L78 Accepts]: Start accepts. Automaton has 49062 states and 119506 transitions. Word has length 35 [2022-03-15 17:09:48,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:09:48,580 INFO L470 AbstractCegarLoop]: Abstraction has 49062 states and 119506 transitions. [2022-03-15 17:09:48,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1951219512195124) internal successors, (90), 40 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:09:48,580 INFO L276 IsEmpty]: Start isEmpty. Operand 49062 states and 119506 transitions. [2022-03-15 17:09:48,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 17:09:48,610 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:09:48,611 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:09:48,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-15 17:09:48,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:09:48,819 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:09:48,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:09:48,820 INFO L85 PathProgramCache]: Analyzing trace with hash -256134681, now seen corresponding path program 61 times [2022-03-15 17:09:48,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:09:48,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344620320] [2022-03-15 17:09:48,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:09:48,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:09:48,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:09:49,105 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:09:49,105 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:09:49,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344620320] [2022-03-15 17:09:49,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344620320] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:09:49,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521990804] [2022-03-15 17:09:49,105 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 17:09:49,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:09:49,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:09:49,106 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:09:49,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-15 17:09:49,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:09:49,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 17:09:49,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:09:50,095 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:09:50,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:09:51,299 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:09:51,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521990804] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:09:51,300 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:09:51,300 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 18] total 43 [2022-03-15 17:09:51,300 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267270251] [2022-03-15 17:09:51,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:09:51,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-15 17:09:51,300 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:09:51,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-15 17:09:51,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=1562, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 17:09:51,300 INFO L87 Difference]: Start difference. First operand 49062 states and 119506 transitions. Second operand has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 43 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:09:56,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:09:56,933 INFO L93 Difference]: Finished difference Result 53754 states and 129377 transitions. [2022-03-15 17:09:56,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-15 17:09:56,934 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 43 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 17:09:56,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:09:57,031 INFO L225 Difference]: With dead ends: 53754 [2022-03-15 17:09:57,031 INFO L226 Difference]: Without dead ends: 53663 [2022-03-15 17:09:57,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6124 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=3487, Invalid=13805, Unknown=0, NotChecked=0, Total=17292 [2022-03-15 17:09:57,033 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 634 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 1800 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 2058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 1800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 17:09:57,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [634 Valid, 488 Invalid, 2058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 1800 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 17:09:57,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53663 states. [2022-03-15 17:09:57,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53663 to 49991. [2022-03-15 17:09:57,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49991 states, 49990 states have (on average 2.4242848569713944) internal successors, (121190), 49990 states have internal predecessors, (121190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:09:58,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49991 states to 49991 states and 121190 transitions. [2022-03-15 17:09:58,041 INFO L78 Accepts]: Start accepts. Automaton has 49991 states and 121190 transitions. Word has length 35 [2022-03-15 17:09:58,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:09:58,041 INFO L470 AbstractCegarLoop]: Abstraction has 49991 states and 121190 transitions. [2022-03-15 17:09:58,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 43 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:09:58,041 INFO L276 IsEmpty]: Start isEmpty. Operand 49991 states and 121190 transitions. [2022-03-15 17:09:58,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 17:09:58,076 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:09:58,076 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:09:58,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-15 17:09:58,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:09:58,291 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:09:58,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:09:58,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1830867861, now seen corresponding path program 62 times [2022-03-15 17:09:58,292 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:09:58,292 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404722596] [2022-03-15 17:09:58,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:09:58,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:09:58,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:09:58,491 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:09:58,491 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:09:58,491 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404722596] [2022-03-15 17:09:58,491 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404722596] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:09:58,491 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003995333] [2022-03-15 17:09:58,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 17:09:58,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:09:58,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:09:58,492 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:09:58,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-15 17:09:58,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 17:09:58,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:09:58,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-15 17:09:58,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:09:59,281 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:09:59,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:10:00,081 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:10:00,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003995333] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:10:00,082 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:10:00,082 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 46 [2022-03-15 17:10:00,082 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524690834] [2022-03-15 17:10:00,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:10:00,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-15 17:10:00,083 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:10:00,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-15 17:10:00,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=1723, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 17:10:00,086 INFO L87 Difference]: Start difference. First operand 49991 states and 121190 transitions. Second operand has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:10:20,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 17:10:20,296 INFO L93 Difference]: Finished difference Result 69563 states and 166964 transitions. [2022-03-15 17:10:20,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 300 states. [2022-03-15 17:10:20,296 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 17:10:20,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 17:10:20,420 INFO L225 Difference]: With dead ends: 69563 [2022-03-15 17:10:20,420 INFO L226 Difference]: Without dead ends: 69248 [2022-03-15 17:10:20,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 48 SyntacticMatches, 13 SemanticMatches, 339 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51753 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=13580, Invalid=102360, Unknown=0, NotChecked=0, Total=115940 [2022-03-15 17:10:20,424 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 863 mSDsluCounter, 1991 mSDsCounter, 0 mSdLazyCounter, 4332 mSolverCounterSat, 386 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 863 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 5510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 386 IncrementalHoareTripleChecker+Valid, 4332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 792 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-15 17:10:20,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [863 Valid, 1012 Invalid, 5510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [386 Valid, 4332 Invalid, 0 Unknown, 792 Unchecked, 1.8s Time] [2022-03-15 17:10:20,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69248 states. [2022-03-15 17:10:21,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69248 to 52330. [2022-03-15 17:10:21,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52330 states, 52329 states have (on average 2.4354182193430027) internal successors, (127443), 52329 states have internal predecessors, (127443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:10:21,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52330 states to 52330 states and 127443 transitions. [2022-03-15 17:10:21,581 INFO L78 Accepts]: Start accepts. Automaton has 52330 states and 127443 transitions. Word has length 35 [2022-03-15 17:10:21,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 17:10:21,581 INFO L470 AbstractCegarLoop]: Abstraction has 52330 states and 127443 transitions. [2022-03-15 17:10:21,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 46 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 17:10:21,581 INFO L276 IsEmpty]: Start isEmpty. Operand 52330 states and 127443 transitions. [2022-03-15 17:10:21,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 17:10:21,618 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 17:10:21,618 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 17:10:21,636 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-03-15 17:10:21,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:10:21,834 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 17:10:21,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 17:10:21,834 INFO L85 PathProgramCache]: Analyzing trace with hash -448015421, now seen corresponding path program 63 times [2022-03-15 17:10:21,835 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 17:10:21,835 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001979016] [2022-03-15 17:10:21,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 17:10:21,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 17:10:21,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 17:10:22,109 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 17:10:22,109 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 17:10:22,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001979016] [2022-03-15 17:10:22,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001979016] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 17:10:22,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329108889] [2022-03-15 17:10:22,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 17:10:22,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 17:10:22,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 17:10:22,129 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 17:10:22,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-15 17:10:22,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-15 17:10:22,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 17:10:22,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-15 17:10:22,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 17:10:22,775 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:10:22,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 17:10:24,704 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 17:10:24,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329108889] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 17:10:24,705 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 17:10:24,705 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 18] total 45 [2022-03-15 17:10:24,705 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878455762] [2022-03-15 17:10:24,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 17:10:24,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-15 17:10:24,705 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 17:10:24,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-15 17:10:24,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=1631, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 17:10:24,706 INFO L87 Difference]: Start difference. First operand 52330 states and 127443 transitions. Second operand has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 45 states have internal predecessors, (95), 0 states have call successors, (0), 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... [2022-03-15 17:11:07,134 WARN L244 SmtUtils]: Removed 13 from assertion stack [2022-03-15 17:11:07,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 353 states. [2022-03-15 17:11:07,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 50 SyntacticMatches, 44 SemanticMatches, 378 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 71221 ImplicationChecksByTransitivity, 41.0s TimeCoverageRelationStatistics Valid=20739, Invalid=123281, Unknown=0, NotChecked=0, Total=144020 [2022-03-15 17:11:07,141 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 743 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 3333 mSolverCounterSat, 383 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 3811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 383 IncrementalHoareTripleChecker+Valid, 3333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-15 17:11:07,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [743 Valid, 285 Invalid, 3811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [383 Valid, 3333 Invalid, 0 Unknown, 95 Unchecked, 1.9s Time] [2022-03-15 17:11:07,142 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-03-15 17:11:07,142 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 17:11:07,142 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 17:11:07,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-15 17:11:07,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-03-15 17:11:07,343 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (52330states) and FLOYD_HOARE automaton (currently 353 states, 45 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 81 for 44ms.. [2022-03-15 17:11:07,356 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-03-15 17:11:07,357 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-03-15 17:11:07,359 INFO L732 BasicCegarLoop]: Path program histogram: [63, 1, 1] [2022-03-15 17:11:07,360 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-15 17:11:07,360 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-15 17:11:07,361 INFO L202 PluginConnector]: Adding new model nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.03 05:11:07 BasicIcfg [2022-03-15 17:11:07,361 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-15 17:11:07,362 INFO L158 Benchmark]: Toolchain (without parser) took 861398.38ms. Allocated memory was 204.5MB in the beginning and 2.8GB in the end (delta: 2.6GB). Free memory was 166.7MB in the beginning and 1.7GB in the end (delta: -1.5GB). Peak memory consumption was 1.0GB. Max. memory is 8.0GB. [2022-03-15 17:11:07,362 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.11ms. Allocated memory is still 204.5MB. Free memory is still 167.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 17:11:07,362 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.01ms. Allocated memory is still 204.5MB. Free memory was 166.7MB in the beginning and 165.1MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 17:11:07,362 INFO L158 Benchmark]: Boogie Preprocessor took 18.16ms. Allocated memory is still 204.5MB. Free memory was 165.1MB in the beginning and 164.2MB in the end (delta: 835.2kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 17:11:07,362 INFO L158 Benchmark]: RCFGBuilder took 191.79ms. Allocated memory is still 204.5MB. Free memory was 164.1MB in the beginning and 155.3MB in the end (delta: 8.8MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-15 17:11:07,362 INFO L158 Benchmark]: TraceAbstraction took 861150.49ms. Allocated memory was 204.5MB in the beginning and 2.8GB in the end (delta: 2.6GB). Free memory was 154.8MB in the beginning and 1.7GB in the end (delta: -1.5GB). Peak memory consumption was 1.0GB. Max. memory is 8.0GB. [2022-03-15 17:11:07,362 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 0.11ms. Allocated memory is still 204.5MB. Free memory is still 167.7MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 34.01ms. Allocated memory is still 204.5MB. Free memory was 166.7MB in the beginning and 165.1MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 18.16ms. Allocated memory is still 204.5MB. Free memory was 165.1MB in the beginning and 164.2MB in the end (delta: 835.2kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 191.79ms. Allocated memory is still 204.5MB. Free memory was 164.1MB in the beginning and 155.3MB in the end (delta: 8.8MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 861150.49ms. Allocated memory was 204.5MB in the beginning and 2.8GB in the end (delta: 2.6GB). Free memory was 154.8MB in the beginning and 1.7GB in the end (delta: -1.5GB). Peak memory consumption was 1.0GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (52330states) and FLOYD_HOARE automaton (currently 353 states, 45 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 81 for 44ms.. - TimeoutResultAtElement [Line: 46]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (52330states) and FLOYD_HOARE automaton (currently 353 states, 45 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 81 for 44ms.. - TimeoutResultAtElement [Line: 46]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (52330states) and FLOYD_HOARE automaton (currently 353 states, 45 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 81 for 44ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 32 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 861.1s, OverallIterations: 65, TraceHistogramMax: 5, PathProgramHistogramMax: 63, EmptinessCheckTime: 0.8s, AutomataDifference: 729.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 43418 SdHoareTripleChecker+Valid, 51.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 43418 mSDsluCounter, 24399 SdHoareTripleChecker+Invalid, 44.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 14754 IncrementalHoareTripleChecker+Unchecked, 45982 mSDsCounter, 16543 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 110282 IncrementalHoareTripleChecker+Invalid, 141579 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 16543 mSolverCounterUnsat, 1362 mSDtfsCounter, 110282 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 13791 GetRequests, 2661 SyntacticMatches, 424 SemanticMatches, 10705 ConstructedPredicates, 0 IntricatePredicates, 20 DeprecatedPredicates, 1105198 ImplicationChecksByTransitivity, 696.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=52330occurred in iteration=64, InterpolantAutomatonStates: 8589, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 20.4s AutomataMinimizationTime, 64 MinimizatonAttempts, 372335 StatesRemovedByMinimization, 64 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 94.0s InterpolantComputationTime, 3902 NumberOfCodeBlocks, 3902 NumberOfCodeBlocksAsserted, 287 NumberOfCheckSat, 5646 ConstructedInterpolants, 104 QuantifiedInterpolants, 112227 SizeOfPredicates, 530 NumberOfNonLiveVariables, 4302 ConjunctsInSsa, 1672 ConjunctsInUnsatCore, 191 InterpolantComputations, 2 PerfectInterpolantSequences, 457/6310 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