/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/test/easy1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-03 20:17:53,936 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-03 20:17:53,937 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-03 20:17:53,965 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-03 20:17:54,009 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 [2022-03-03 20:17:54,038 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-03 20:17:54,039 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-03 20:17:54,039 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-03 20:17:54,039 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-03 20:17:54,040 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-03 20:17:54,040 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-03 20:17:54,040 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-03 20:17:54,040 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-03 20:17:54,040 INFO L138 SettingsManager]: * Use SBE=true [2022-03-03 20:17:54,041 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-03 20:17:54,041 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-03 20:17:54,041 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-03 20:17:54,041 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-03 20:17:54,042 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-03 20:17:54,042 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-03 20:17:54,042 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-03 20:17:54,042 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-03 20:17:54,042 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-03 20:17:54,042 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-03 20:17:54,042 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-03 20:17:54,042 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-03 20:17:54,042 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-03 20:17:54,042 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-03 20:17:54,042 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-03 20:17:54,042 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-03 20:17:54,043 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 20:17:54,044 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-03 20:17:54,044 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-03 20:17:54,044 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-03 20:17:54,044 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-03 20:17:54,044 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-03 20:17:54,044 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-03 20:17:54,044 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-03 20:17:54,044 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-03 20:17:54,233 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-03 20:17:54,247 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-03 20:17:54,249 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-03 20:17:54,250 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-03 20:17:54,250 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-03 20:17:54,251 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy1.wvr.bpl [2022-03-03 20:17:54,251 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy1.wvr.bpl' [2022-03-03 20:17:54,271 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-03 20:17:54,271 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-03 20:17:54,274 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-03 20:17:54,274 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-03 20:17:54,274 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-03 20:17:54,282 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:17:54" (1/1) ... [2022-03-03 20:17:54,286 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:17:54" (1/1) ... [2022-03-03 20:17:54,290 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-03 20:17:54,291 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-03 20:17:54,292 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-03 20:17:54,292 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-03 20:17:54,292 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-03 20:17:54,298 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:17:54" (1/1) ... [2022-03-03 20:17:54,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:17:54" (1/1) ... [2022-03-03 20:17:54,298 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:17:54" (1/1) ... [2022-03-03 20:17:54,298 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:17:54" (1/1) ... [2022-03-03 20:17:54,299 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:17:54" (1/1) ... [2022-03-03 20:17:54,302 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:17:54" (1/1) ... [2022-03-03 20:17:54,302 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:17:54" (1/1) ... [2022-03-03 20:17:54,304 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-03 20:17:54,305 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-03 20:17:54,305 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-03 20:17:54,305 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-03 20:17:54,306 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:17:54" (1/1) ... [2022-03-03 20:17:54,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 20:17:54,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:17:54,340 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) [2022-03-03 20:17:54,349 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 [2022-03-03 20:17:54,365 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-03 20:17:54,366 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-03 20:17:54,366 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-03 20:17:54,366 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-03 20:17:54,366 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-03 20:17:54,366 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-03 20:17:54,366 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-03 20:17:54,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-03 20:17:54,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-03 20:17:54,367 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-03 20:17:54,396 INFO L234 CfgBuilder]: Building ICFG [2022-03-03 20:17:54,397 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-03 20:17:54,486 INFO L275 CfgBuilder]: Performing block encoding [2022-03-03 20:17:54,494 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-03 20:17:54,495 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-03 20:17:54,498 INFO L202 PluginConnector]: Adding new model easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 08:17:54 BoogieIcfgContainer [2022-03-03 20:17:54,498 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-03 20:17:54,519 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-03 20:17:54,519 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-03 20:17:54,521 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-03 20:17:54,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:17:54" (1/2) ... [2022-03-03 20:17:54,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26f82156 and model type easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 08:17:54, skipping insertion in model container [2022-03-03 20:17:54,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 08:17:54" (2/2) ... [2022-03-03 20:17:54,527 INFO L111 eAbstractionObserver]: Analyzing ICFG easy1.wvr.bpl [2022-03-03 20:17:54,536 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-03 20:17:54,536 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-03 20:17:54,536 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-03 20:17:54,536 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-03 20:17:54,569 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-03 20:17:54,608 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-03 20:17:54,613 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 [2022-03-03 20:17:54,613 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-03 20:17:54,622 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 24 places, 19 transitions, 54 flow [2022-03-03 20:17:54,638 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 29 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:54,639 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:54,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-03 20:17:54,644 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:17:54,644 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:17:54,645 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:17:54,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:17:54,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1426123723, now seen corresponding path program 1 times [2022-03-03 20:17:54,660 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:17:54,661 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216302000] [2022-03-03 20:17:54,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:17:54,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:17:54,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:17:54,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:54,755 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:17:54,756 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216302000] [2022-03-03 20:17:54,756 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216302000] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 20:17:54,756 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 20:17:54,756 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-03 20:17:54,758 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507660917] [2022-03-03 20:17:54,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 20:17:54,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-03 20:17:54,761 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:17:54,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-03 20:17:54,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 20:17:54,780 INFO L87 Difference]: Start difference. First operand has 29 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 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 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:54,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:17:54,813 INFO L93 Difference]: Finished difference Result 54 states and 102 transitions. [2022-03-03 20:17:54,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-03 20:17:54,815 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-03-03 20:17:54,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:17:54,821 INFO L225 Difference]: With dead ends: 54 [2022-03-03 20:17:54,821 INFO L226 Difference]: Without dead ends: 47 [2022-03-03 20:17:54,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 20:17:54,825 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 2 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:17:54,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 8 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 20:17:54,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-03 20:17:54,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2022-03-03 20:17:54,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 37 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:54,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 71 transitions. [2022-03-03 20:17:54,851 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 71 transitions. Word has length 11 [2022-03-03 20:17:54,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:17:54,851 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 71 transitions. [2022-03-03 20:17:54,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:54,852 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 71 transitions. [2022-03-03 20:17:54,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-03 20:17:54,852 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:17:54,852 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:17:54,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-03 20:17:54,853 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:17:54,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:17:54,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1215702579, now seen corresponding path program 1 times [2022-03-03 20:17:54,854 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:17:54,854 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5615842] [2022-03-03 20:17:54,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:17:54,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:17:54,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:17:54,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:54,915 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:17:54,916 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5615842] [2022-03-03 20:17:54,916 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5615842] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:17:54,916 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590874445] [2022-03-03 20:17:54,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:17:54,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:54,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:17:54,926 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) [2022-03-03 20:17:54,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-03 20:17:54,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:17:54,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-03 20:17:54,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:17:55,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:55,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:17:55,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:55,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590874445] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-03 20:17:55,106 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-03 20:17:55,106 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 4 [2022-03-03 20:17:55,106 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167087219] [2022-03-03 20:17:55,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 20:17:55,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 20:17:55,107 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:17:55,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 20:17:55,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 20:17:55,108 INFO L87 Difference]: Start difference. First operand 38 states and 71 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:55,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:17:55,138 INFO L93 Difference]: Finished difference Result 68 states and 117 transitions. [2022-03-03 20:17:55,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 20:17:55,139 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-03 20:17:55,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:17:55,140 INFO L225 Difference]: With dead ends: 68 [2022-03-03 20:17:55,140 INFO L226 Difference]: Without dead ends: 68 [2022-03-03 20:17:55,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 20:17:55,141 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 16 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:17:55,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 18 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 20:17:55,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-03-03 20:17:55,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 38. [2022-03-03 20:17:55,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 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) [2022-03-03 20:17:55,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 73 transitions. [2022-03-03 20:17:55,148 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 73 transitions. Word has length 13 [2022-03-03 20:17:55,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:17:55,149 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 73 transitions. [2022-03-03 20:17:55,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:55,149 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 73 transitions. [2022-03-03 20:17:55,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-03 20:17:55,149 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:17:55,149 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:17:55,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-03 20:17:55,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:55,358 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:17:55,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:17:55,359 INFO L85 PathProgramCache]: Analyzing trace with hash -512897271, now seen corresponding path program 1 times [2022-03-03 20:17:55,359 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:17:55,359 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596632068] [2022-03-03 20:17:55,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:17:55,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:17:55,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:17:55,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:55,386 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:17:55,387 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596632068] [2022-03-03 20:17:55,387 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596632068] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 20:17:55,387 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 20:17:55,387 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 20:17:55,387 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939106498] [2022-03-03 20:17:55,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 20:17:55,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 20:17:55,387 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:17:55,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 20:17:55,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-03 20:17:55,388 INFO L87 Difference]: Start difference. First operand 38 states and 73 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:55,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:17:55,447 INFO L93 Difference]: Finished difference Result 68 states and 122 transitions. [2022-03-03 20:17:55,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 20:17:55,448 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-03 20:17:55,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:17:55,449 INFO L225 Difference]: With dead ends: 68 [2022-03-03 20:17:55,449 INFO L226 Difference]: Without dead ends: 63 [2022-03-03 20:17:55,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 20:17:55,451 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 23 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:17:55,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 10 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 20:17:55,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-03 20:17:55,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2022-03-03 20:17:55,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:55,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 88 transitions. [2022-03-03 20:17:55,457 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 88 transitions. Word has length 13 [2022-03-03 20:17:55,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:17:55,457 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 88 transitions. [2022-03-03 20:17:55,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:55,457 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 88 transitions. [2022-03-03 20:17:55,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-03 20:17:55,462 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:17:55,462 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:17:55,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-03 20:17:55,462 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:17:55,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:17:55,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1777825131, now seen corresponding path program 2 times [2022-03-03 20:17:55,463 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:17:55,463 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005691773] [2022-03-03 20:17:55,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:17:55,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:17:55,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:17:55,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:55,491 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:17:55,491 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005691773] [2022-03-03 20:17:55,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005691773] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 20:17:55,492 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 20:17:55,492 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 20:17:55,492 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459764652] [2022-03-03 20:17:55,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 20:17:55,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 20:17:55,496 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:17:55,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 20:17:55,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-03 20:17:55,498 INFO L87 Difference]: Start difference. First operand 46 states and 88 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:55,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:17:55,544 INFO L93 Difference]: Finished difference Result 48 states and 91 transitions. [2022-03-03 20:17:55,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 20:17:55,545 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-03 20:17:55,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:17:55,549 INFO L225 Difference]: With dead ends: 48 [2022-03-03 20:17:55,549 INFO L226 Difference]: Without dead ends: 48 [2022-03-03 20:17:55,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 20:17:55,555 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 12 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:17:55,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 16 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 20:17:55,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-03 20:17:55,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2022-03-03 20:17:55,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:55,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 76 transitions. [2022-03-03 20:17:55,563 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 76 transitions. Word has length 13 [2022-03-03 20:17:55,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:17:55,564 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 76 transitions. [2022-03-03 20:17:55,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:55,564 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 76 transitions. [2022-03-03 20:17:55,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-03 20:17:55,564 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:17:55,564 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:17:55,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-03 20:17:55,565 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:17:55,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:17:55,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1133244083, now seen corresponding path program 2 times [2022-03-03 20:17:55,570 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:17:55,571 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467852176] [2022-03-03 20:17:55,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:17:55,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:17:55,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:17:55,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:55,594 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:17:55,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467852176] [2022-03-03 20:17:55,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467852176] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 20:17:55,595 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 20:17:55,595 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 20:17:55,595 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123130011] [2022-03-03 20:17:55,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 20:17:55,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 20:17:55,596 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:17:55,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 20:17:55,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-03 20:17:55,596 INFO L87 Difference]: Start difference. First operand 40 states and 76 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:55,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:17:55,627 INFO L93 Difference]: Finished difference Result 48 states and 89 transitions. [2022-03-03 20:17:55,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 20:17:55,628 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-03 20:17:55,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:17:55,628 INFO L225 Difference]: With dead ends: 48 [2022-03-03 20:17:55,628 INFO L226 Difference]: Without dead ends: 46 [2022-03-03 20:17:55,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 20:17:55,629 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 21 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:17:55,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 11 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 20:17:55,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-03 20:17:55,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2022-03-03 20:17:55,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:55,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 75 transitions. [2022-03-03 20:17:55,633 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 75 transitions. Word has length 13 [2022-03-03 20:17:55,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:17:55,633 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 75 transitions. [2022-03-03 20:17:55,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:55,634 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 75 transitions. [2022-03-03 20:17:55,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-03 20:17:55,634 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:17:55,634 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:17:55,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-03 20:17:55,635 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:17:55,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:17:55,635 INFO L85 PathProgramCache]: Analyzing trace with hash -982301557, now seen corresponding path program 1 times [2022-03-03 20:17:55,635 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:17:55,635 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560809947] [2022-03-03 20:17:55,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:17:55,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:17:55,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:17:55,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:55,737 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:17:55,737 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560809947] [2022-03-03 20:17:55,737 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560809947] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:17:55,737 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330086201] [2022-03-03 20:17:55,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:17:55,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:55,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:17:55,739 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) [2022-03-03 20:17:55,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-03 20:17:55,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:17:55,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:17:55,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:17:55,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:55,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:17:55,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:55,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330086201] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:17:55,947 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:17:55,947 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 3] total 7 [2022-03-03 20:17:55,947 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143301495] [2022-03-03 20:17:55,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:17:55,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-03 20:17:55,949 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:17:55,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-03 20:17:55,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-03-03 20:17:55,949 INFO L87 Difference]: Start difference. First operand 40 states and 75 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:56,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:17:56,092 INFO L93 Difference]: Finished difference Result 129 states and 238 transitions. [2022-03-03 20:17:56,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 20:17:56,093 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:17:56,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:17:56,094 INFO L225 Difference]: With dead ends: 129 [2022-03-03 20:17:56,094 INFO L226 Difference]: Without dead ends: 122 [2022-03-03 20:17:56,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-03-03 20:17:56,095 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 65 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:17:56,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 44 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:17:56,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-03-03 20:17:56,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 64. [2022-03-03 20:17:56,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.0634920634920637) internal successors, (130), 63 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:56,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 130 transitions. [2022-03-03 20:17:56,103 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 130 transitions. Word has length 15 [2022-03-03 20:17:56,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:17:56,103 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 130 transitions. [2022-03-03 20:17:56,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:56,103 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 130 transitions. [2022-03-03 20:17:56,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-03 20:17:56,104 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:17:56,104 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:17:56,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-03 20:17:56,323 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,SelfDestructingSolverStorable5 [2022-03-03 20:17:56,324 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:17:56,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:17:56,324 INFO L85 PathProgramCache]: Analyzing trace with hash 2131843979, now seen corresponding path program 2 times [2022-03-03 20:17:56,324 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:17:56,324 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037018748] [2022-03-03 20:17:56,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:17:56,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:17:56,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:17:56,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:56,398 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:17:56,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037018748] [2022-03-03 20:17:56,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037018748] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:17:56,399 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371234286] [2022-03-03 20:17:56,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:17:56,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:56,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:17:56,412 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) [2022-03-03 20:17:56,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-03 20:17:56,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:17:56,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:17:56,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:17:56,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:17:56,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 20:17:56,523 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-03 20:17:56,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371234286] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 20:17:56,523 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-03 20:17:56,523 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-03-03 20:17:56,523 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047470842] [2022-03-03 20:17:56,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 20:17:56,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 20:17:56,524 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:17:56,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 20:17:56,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-03-03 20:17:56,525 INFO L87 Difference]: Start difference. First operand 64 states and 130 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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) [2022-03-03 20:17:56,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:17:56,558 INFO L93 Difference]: Finished difference Result 114 states and 226 transitions. [2022-03-03 20:17:56,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 20:17:56,558 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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 [2022-03-03 20:17:56,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:17:56,559 INFO L225 Difference]: With dead ends: 114 [2022-03-03 20:17:56,559 INFO L226 Difference]: Without dead ends: 107 [2022-03-03 20:17:56,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-03-03 20:17:56,560 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 10 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:17:56,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 20 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 20:17:56,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-03 20:17:56,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 82. [2022-03-03 20:17:56,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.1481481481481484) internal successors, (174), 81 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:56,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 174 transitions. [2022-03-03 20:17:56,571 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 174 transitions. Word has length 15 [2022-03-03 20:17:56,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:17:56,571 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 174 transitions. [2022-03-03 20:17:56,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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) [2022-03-03 20:17:56,571 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 174 transitions. [2022-03-03 20:17:56,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-03 20:17:56,572 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:17:56,572 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:17:56,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-03 20:17:56,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:56,789 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:17:56,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:17:56,789 INFO L85 PathProgramCache]: Analyzing trace with hash -22218807, now seen corresponding path program 3 times [2022-03-03 20:17:56,789 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:17:56,789 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361538301] [2022-03-03 20:17:56,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:17:56,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:17:56,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:17:56,824 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:56,824 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:17:56,824 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361538301] [2022-03-03 20:17:56,824 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361538301] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:17:56,824 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703623309] [2022-03-03 20:17:56,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:17:56,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:56,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:17:56,840 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) [2022-03-03 20:17:56,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-03 20:17:56,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:17:56,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:17:56,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 20:17:56,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:17:56,886 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:56,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:17:56,941 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:56,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703623309] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:17:56,942 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:17:56,942 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-03-03 20:17:56,942 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140200720] [2022-03-03 20:17:56,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:17:56,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-03 20:17:56,942 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:17:56,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-03 20:17:56,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-03 20:17:56,943 INFO L87 Difference]: Start difference. First operand 82 states and 174 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:56,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:17:56,997 INFO L93 Difference]: Finished difference Result 146 states and 283 transitions. [2022-03-03 20:17:56,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-03 20:17:56,997 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:17:56,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:17:56,998 INFO L225 Difference]: With dead ends: 146 [2022-03-03 20:17:56,998 INFO L226 Difference]: Without dead ends: 135 [2022-03-03 20:17:56,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-03-03 20:17:56,998 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 70 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:17:56,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 14 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 20:17:56,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-03 20:17:57,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 102. [2022-03-03 20:17:57,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.1485148514851486) internal successors, (217), 101 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:57,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 217 transitions. [2022-03-03 20:17:57,014 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 217 transitions. Word has length 17 [2022-03-03 20:17:57,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:17:57,014 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 217 transitions. [2022-03-03 20:17:57,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:57,015 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 217 transitions. [2022-03-03 20:17:57,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-03 20:17:57,016 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:17:57,016 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:17:57,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-03 20:17:57,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:57,233 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:17:57,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:17:57,234 INFO L85 PathProgramCache]: Analyzing trace with hash 681463121, now seen corresponding path program 4 times [2022-03-03 20:17:57,234 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:17:57,234 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666005160] [2022-03-03 20:17:57,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:17:57,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:17:57,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:17:57,265 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:57,266 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:17:57,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666005160] [2022-03-03 20:17:57,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666005160] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:17:57,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696996503] [2022-03-03 20:17:57,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:17:57,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:57,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:17:57,267 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) [2022-03-03 20:17:57,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:17:57,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:17:57,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 20:17:57,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:17:57,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-03 20:17:57,339 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:57,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:17:57,410 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:57,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696996503] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:17:57,410 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:17:57,410 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5] total 7 [2022-03-03 20:17:57,410 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270883460] [2022-03-03 20:17:57,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:17:57,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-03 20:17:57,411 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:17:57,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-03 20:17:57,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-03 20:17:57,411 INFO L87 Difference]: Start difference. First operand 102 states and 217 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:57,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:17:57,527 INFO L93 Difference]: Finished difference Result 176 states and 320 transitions. [2022-03-03 20:17:57,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 20:17:57,528 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-03 20:17:57,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:17:57,529 INFO L225 Difference]: With dead ends: 176 [2022-03-03 20:17:57,529 INFO L226 Difference]: Without dead ends: 176 [2022-03-03 20:17:57,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2022-03-03 20:17:57,531 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 76 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:17:57,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 39 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:17:57,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-03-03 20:17:57,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 100. [2022-03-03 20:17:57,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.1313131313131315) internal successors, (211), 99 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:57,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 211 transitions. [2022-03-03 20:17:57,543 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 211 transitions. Word has length 17 [2022-03-03 20:17:57,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:17:57,543 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 211 transitions. [2022-03-03 20:17:57,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:57,543 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 211 transitions. [2022-03-03 20:17:57,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-03 20:17:57,546 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:17:57,546 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:17:57,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-03 20:17:57,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:57,760 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:17:57,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:17:57,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1838620233, now seen corresponding path program 5 times [2022-03-03 20:17:57,760 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:17:57,760 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820996075] [2022-03-03 20:17:57,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:17:57,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:17:57,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:17:57,781 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:57,781 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:17:57,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820996075] [2022-03-03 20:17:57,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820996075] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:17:57,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732101002] [2022-03-03 20:17:57,781 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:17:57,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:57,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:17:57,782 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) [2022-03-03 20:17:57,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-03 20:17:57,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 20:17:57,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:17:57,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 20:17:57,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:17:57,827 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:57,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:17:57,896 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:57,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732101002] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:17:57,896 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:17:57,896 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5] total 7 [2022-03-03 20:17:57,896 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056169501] [2022-03-03 20:17:57,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:17:57,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-03 20:17:57,897 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:17:57,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-03 20:17:57,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-03-03 20:17:57,897 INFO L87 Difference]: Start difference. First operand 100 states and 211 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:57,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:17:57,947 INFO L93 Difference]: Finished difference Result 126 states and 250 transitions. [2022-03-03 20:17:57,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-03 20:17:57,947 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-03 20:17:57,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:17:57,948 INFO L225 Difference]: With dead ends: 126 [2022-03-03 20:17:57,948 INFO L226 Difference]: Without dead ends: 124 [2022-03-03 20:17:57,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-03-03 20:17:57,949 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 52 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:17:57,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 17 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 20:17:57,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-03-03 20:17:57,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 100. [2022-03-03 20:17:57,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.111111111111111) internal successors, (209), 99 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:57,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 209 transitions. [2022-03-03 20:17:57,952 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 209 transitions. Word has length 17 [2022-03-03 20:17:57,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:17:57,952 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 209 transitions. [2022-03-03 20:17:57,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:57,952 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 209 transitions. [2022-03-03 20:17:57,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-03 20:17:57,953 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:17:57,953 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:17:57,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-03 20:17:58,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:58,163 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:17:58,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:17:58,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1623369331, now seen corresponding path program 6 times [2022-03-03 20:17:58,164 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:17:58,164 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963597286] [2022-03-03 20:17:58,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:17:58,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:17:58,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:17:58,189 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:17:58,189 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:17:58,189 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963597286] [2022-03-03 20:17:58,189 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963597286] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:17:58,189 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396514087] [2022-03-03 20:17:58,189 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:17:58,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:58,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:17:58,190 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) [2022-03-03 20:17:58,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-03 20:17:58,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:17:58,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:17:58,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 20:17:58,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:17:58,235 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:17:58,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:17:58,302 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:58,302 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396514087] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:17:58,302 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:17:58,302 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5] total 7 [2022-03-03 20:17:58,302 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944887977] [2022-03-03 20:17:58,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:17:58,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-03 20:17:58,303 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:17:58,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-03 20:17:58,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-03 20:17:58,303 INFO L87 Difference]: Start difference. First operand 100 states and 209 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:58,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:17:58,410 INFO L93 Difference]: Finished difference Result 225 states and 418 transitions. [2022-03-03 20:17:58,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 20:17:58,410 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-03 20:17:58,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:17:58,411 INFO L225 Difference]: With dead ends: 225 [2022-03-03 20:17:58,411 INFO L226 Difference]: Without dead ends: 225 [2022-03-03 20:17:58,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2022-03-03 20:17:58,412 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 85 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:17:58,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 36 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:17:58,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-03-03 20:17:58,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 109. [2022-03-03 20:17:58,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.1666666666666665) internal successors, (234), 108 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:58,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 234 transitions. [2022-03-03 20:17:58,416 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 234 transitions. Word has length 17 [2022-03-03 20:17:58,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:17:58,416 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 234 transitions. [2022-03-03 20:17:58,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:58,416 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 234 transitions. [2022-03-03 20:17:58,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-03 20:17:58,416 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:17:58,416 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:17:58,439 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-03 20:17:58,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:58,624 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:17:58,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:17:58,624 INFO L85 PathProgramCache]: Analyzing trace with hash -920564023, now seen corresponding path program 7 times [2022-03-03 20:17:58,624 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:17:58,624 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026184849] [2022-03-03 20:17:58,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:17:58,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:17:58,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:17:58,653 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:17:58,654 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:17:58,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026184849] [2022-03-03 20:17:58,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026184849] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:17:58,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933544632] [2022-03-03 20:17:58,654 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:17:58,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:58,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:17:58,655 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) [2022-03-03 20:17:58,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-03 20:17:58,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:17:58,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 20:17:58,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:17:58,720 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:17:58,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:17:58,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:58,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933544632] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:17:58,786 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:17:58,786 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5] total 7 [2022-03-03 20:17:58,786 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183798660] [2022-03-03 20:17:58,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:17:58,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-03 20:17:58,787 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:17:58,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-03 20:17:58,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-03-03 20:17:58,787 INFO L87 Difference]: Start difference. First operand 109 states and 234 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:58,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:17:58,855 INFO L93 Difference]: Finished difference Result 155 states and 313 transitions. [2022-03-03 20:17:58,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-03 20:17:58,855 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-03 20:17:58,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:17:58,856 INFO L225 Difference]: With dead ends: 155 [2022-03-03 20:17:58,856 INFO L226 Difference]: Without dead ends: 152 [2022-03-03 20:17:58,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-03-03 20:17:58,857 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 48 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:17:58,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 18 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:17:58,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-03-03 20:17:58,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 115. [2022-03-03 20:17:58,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.2280701754385963) internal successors, (254), 114 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:58,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 254 transitions. [2022-03-03 20:17:58,862 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 254 transitions. Word has length 17 [2022-03-03 20:17:58,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:17:58,862 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 254 transitions. [2022-03-03 20:17:58,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:58,862 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 254 transitions. [2022-03-03 20:17:58,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-03 20:17:58,863 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:17:58,863 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:17:58,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-03 20:17:59,080 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,SelfDestructingSolverStorable11 [2022-03-03 20:17:59,081 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:17:59,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:17:59,081 INFO L85 PathProgramCache]: Analyzing trace with hash 2109475413, now seen corresponding path program 8 times [2022-03-03 20:17:59,081 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:17:59,081 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744545073] [2022-03-03 20:17:59,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:17:59,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:17:59,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:17:59,100 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:17:59,100 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:17:59,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744545073] [2022-03-03 20:17:59,100 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744545073] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:17:59,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840650778] [2022-03-03 20:17:59,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:17:59,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:59,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:17:59,104 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) [2022-03-03 20:17:59,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-03 20:17:59,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:17:59,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:17:59,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 20:17:59,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:17:59,175 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:17:59,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:17:59,252 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:59,252 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840650778] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:17:59,252 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:17:59,253 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5] total 7 [2022-03-03 20:17:59,253 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755768594] [2022-03-03 20:17:59,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:17:59,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-03 20:17:59,253 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:17:59,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-03 20:17:59,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-03 20:17:59,254 INFO L87 Difference]: Start difference. First operand 115 states and 254 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:59,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:17:59,341 INFO L93 Difference]: Finished difference Result 181 states and 360 transitions. [2022-03-03 20:17:59,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 20:17:59,342 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-03 20:17:59,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:17:59,343 INFO L225 Difference]: With dead ends: 181 [2022-03-03 20:17:59,343 INFO L226 Difference]: Without dead ends: 181 [2022-03-03 20:17:59,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-03-03 20:17:59,344 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 90 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:17:59,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 30 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:17:59,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-03-03 20:17:59,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 117. [2022-03-03 20:17:59,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.2241379310344827) internal successors, (258), 116 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:59,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 258 transitions. [2022-03-03 20:17:59,347 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 258 transitions. Word has length 17 [2022-03-03 20:17:59,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:17:59,347 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 258 transitions. [2022-03-03 20:17:59,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:59,348 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 258 transitions. [2022-03-03 20:17:59,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-03 20:17:59,348 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:17:59,348 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:17:59,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-03 20:17:59,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-03 20:17:59,563 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:17:59,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:17:59,564 INFO L85 PathProgramCache]: Analyzing trace with hash 725577331, now seen corresponding path program 9 times [2022-03-03 20:17:59,564 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:17:59,564 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753303715] [2022-03-03 20:17:59,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:17:59,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:17:59,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:17:59,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:17:59,582 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:17:59,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753303715] [2022-03-03 20:17:59,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753303715] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:17:59,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971521057] [2022-03-03 20:17:59,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:17:59,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:59,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:17:59,583 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) [2022-03-03 20:17:59,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-03 20:17:59,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:17:59,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:17:59,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 20:17:59,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:17:59,640 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:17:59,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:17:59,695 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:59,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971521057] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:17:59,695 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:17:59,695 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5] total 7 [2022-03-03 20:17:59,695 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149800900] [2022-03-03 20:17:59,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:17:59,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-03 20:17:59,696 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:17:59,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-03 20:17:59,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-03 20:17:59,696 INFO L87 Difference]: Start difference. First operand 117 states and 258 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:59,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:17:59,765 INFO L93 Difference]: Finished difference Result 170 states and 342 transitions. [2022-03-03 20:17:59,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 20:17:59,765 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-03 20:17:59,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:17:59,766 INFO L225 Difference]: With dead ends: 170 [2022-03-03 20:17:59,766 INFO L226 Difference]: Without dead ends: 168 [2022-03-03 20:17:59,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2022-03-03 20:17:59,767 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 75 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:17:59,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 16 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 20:17:59,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-03-03 20:17:59,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 119. [2022-03-03 20:17:59,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.2033898305084745) internal successors, (260), 118 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:59,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 260 transitions. [2022-03-03 20:17:59,770 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 260 transitions. Word has length 17 [2022-03-03 20:17:59,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:17:59,770 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 260 transitions. [2022-03-03 20:17:59,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:59,770 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 260 transitions. [2022-03-03 20:17:59,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-03 20:17:59,770 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:17:59,770 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:17:59,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-03 20:17:59,988 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,SelfDestructingSolverStorable13 [2022-03-03 20:17:59,988 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:17:59,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:17:59,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1091400295, now seen corresponding path program 10 times [2022-03-03 20:17:59,988 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:17:59,988 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601187517] [2022-03-03 20:17:59,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:17:59,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:17:59,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:18:00,011 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:00,011 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:18:00,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601187517] [2022-03-03 20:18:00,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601187517] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:18:00,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524882133] [2022-03-03 20:18:00,012 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:18:00,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:00,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:18:00,013 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) [2022-03-03 20:18:00,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-03 20:18:00,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:18:00,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:18:00,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 20:18:00,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:18:00,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:00,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:18:00,102 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:00,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524882133] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:18:00,103 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:18:00,103 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-03-03 20:18:00,103 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421351385] [2022-03-03 20:18:00,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:18:00,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-03 20:18:00,103 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:18:00,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-03 20:18:00,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-03-03 20:18:00,104 INFO L87 Difference]: Start difference. First operand 119 states and 260 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:00,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:18:00,204 INFO L93 Difference]: Finished difference Result 169 states and 333 transitions. [2022-03-03 20:18:00,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 20:18:00,204 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-03 20:18:00,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:18:00,205 INFO L225 Difference]: With dead ends: 169 [2022-03-03 20:18:00,205 INFO L226 Difference]: Without dead ends: 169 [2022-03-03 20:18:00,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-03 20:18:00,206 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 38 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:18:00,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 49 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:18:00,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-03-03 20:18:00,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 116. [2022-03-03 20:18:00,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1739130434782608) internal successors, (250), 115 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:00,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 250 transitions. [2022-03-03 20:18:00,209 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 250 transitions. Word has length 17 [2022-03-03 20:18:00,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:18:00,209 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 250 transitions. [2022-03-03 20:18:00,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:00,209 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 250 transitions. [2022-03-03 20:18:00,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-03 20:18:00,209 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:18:00,209 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:18:00,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-03 20:18:00,425 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,SelfDestructingSolverStorable14 [2022-03-03 20:18:00,425 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:18:00,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:18:00,426 INFO L85 PathProgramCache]: Analyzing trace with hash 219231065, now seen corresponding path program 11 times [2022-03-03 20:18:00,426 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:18:00,426 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981516526] [2022-03-03 20:18:00,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:18:00,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:18:00,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:18:00,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:00,446 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:18:00,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981516526] [2022-03-03 20:18:00,447 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981516526] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:18:00,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10697182] [2022-03-03 20:18:00,447 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:18:00,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:00,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:18:00,448 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) [2022-03-03 20:18:00,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-03 20:18:00,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:18:00,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:18:00,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 20:18:00,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:18:00,487 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:00,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:18:00,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:00,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10697182] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:18:00,531 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:18:00,531 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-03-03 20:18:00,531 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960414606] [2022-03-03 20:18:00,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:18:00,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-03 20:18:00,532 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:18:00,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-03 20:18:00,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-03 20:18:00,532 INFO L87 Difference]: Start difference. First operand 116 states and 250 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:00,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:18:00,589 INFO L93 Difference]: Finished difference Result 167 states and 329 transitions. [2022-03-03 20:18:00,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-03 20:18:00,589 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-03 20:18:00,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:18:00,590 INFO L225 Difference]: With dead ends: 167 [2022-03-03 20:18:00,590 INFO L226 Difference]: Without dead ends: 161 [2022-03-03 20:18:00,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-03-03 20:18:00,591 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 67 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:18:00,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 17 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 20:18:00,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-03-03 20:18:00,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 120. [2022-03-03 20:18:00,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.1512605042016806) internal successors, (256), 119 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:00,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 256 transitions. [2022-03-03 20:18:00,595 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 256 transitions. Word has length 17 [2022-03-03 20:18:00,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:18:00,595 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 256 transitions. [2022-03-03 20:18:00,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:00,595 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 256 transitions. [2022-03-03 20:18:00,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 20:18:00,595 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:18:00,595 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:18:00,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-03 20:18:00,811 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,SelfDestructingSolverStorable15 [2022-03-03 20:18:00,811 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:18:00,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:18:00,812 INFO L85 PathProgramCache]: Analyzing trace with hash -803742645, now seen corresponding path program 12 times [2022-03-03 20:18:00,812 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:18:00,812 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017784554] [2022-03-03 20:18:00,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:18:00,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:18:00,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:18:00,867 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:00,867 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:18:00,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017784554] [2022-03-03 20:18:00,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017784554] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:18:00,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38993870] [2022-03-03 20:18:00,867 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:18:00,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:00,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:18:00,878 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) [2022-03-03 20:18:00,899 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:18:00,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:18:00,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-03 20:18:00,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:18:00,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-03 20:18:00,984 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:00,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:18:01,046 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:01,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38993870] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:18:01,047 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:18:01,047 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 10 [2022-03-03 20:18:01,047 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943338905] [2022-03-03 20:18:01,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:18:01,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 20:18:01,047 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:18:01,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 20:18:01,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-03-03 20:18:01,048 INFO L87 Difference]: Start difference. First operand 120 states and 256 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:01,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:18:01,189 INFO L93 Difference]: Finished difference Result 303 states and 601 transitions. [2022-03-03 20:18:01,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 20:18:01,189 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-03 20:18:01,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:18:01,190 INFO L225 Difference]: With dead ends: 303 [2022-03-03 20:18:01,190 INFO L226 Difference]: Without dead ends: 296 [2022-03-03 20:18:01,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2022-03-03 20:18:01,191 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 195 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:18:01,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 52 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:18:01,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-03-03 20:18:01,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 151. [2022-03-03 20:18:01,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.2533333333333334) internal successors, (338), 150 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:01,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 338 transitions. [2022-03-03 20:18:01,195 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 338 transitions. Word has length 19 [2022-03-03 20:18:01,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:18:01,195 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 338 transitions. [2022-03-03 20:18:01,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:01,195 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 338 transitions. [2022-03-03 20:18:01,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 20:18:01,196 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:18:01,196 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:18:01,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-03 20:18:01,403 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,SelfDestructingSolverStorable16 [2022-03-03 20:18:01,404 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:18:01,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:18:01,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1412057675, now seen corresponding path program 13 times [2022-03-03 20:18:01,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:18:01,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252694164] [2022-03-03 20:18:01,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:18:01,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:18:01,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:18:01,495 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:01,495 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:18:01,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252694164] [2022-03-03 20:18:01,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252694164] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:18:01,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311472825] [2022-03-03 20:18:01,495 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:18:01,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:01,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:18:01,497 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) [2022-03-03 20:18:01,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-03 20:18:01,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:18:01,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-03 20:18:01,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:18:01,606 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 20:18:01,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:18:01,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 20:18:01,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311472825] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:18:01,664 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:18:01,665 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 8 [2022-03-03 20:18:01,665 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532841638] [2022-03-03 20:18:01,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:18:01,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 20:18:01,665 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:18:01,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 20:18:01,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-03-03 20:18:01,666 INFO L87 Difference]: Start difference. First operand 151 states and 338 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:01,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:18:01,815 INFO L93 Difference]: Finished difference Result 285 states and 591 transitions. [2022-03-03 20:18:01,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 20:18:01,815 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-03 20:18:01,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:18:01,818 INFO L225 Difference]: With dead ends: 285 [2022-03-03 20:18:01,818 INFO L226 Difference]: Without dead ends: 275 [2022-03-03 20:18:01,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-03-03 20:18:01,819 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 57 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:18:01,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 98 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:18:01,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-03-03 20:18:01,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 186. [2022-03-03 20:18:01,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.264864864864865) internal successors, (419), 185 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:01,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 419 transitions. [2022-03-03 20:18:01,824 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 419 transitions. Word has length 19 [2022-03-03 20:18:01,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:18:01,824 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 419 transitions. [2022-03-03 20:18:01,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:01,824 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 419 transitions. [2022-03-03 20:18:01,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 20:18:01,825 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:18:01,825 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:18:01,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-03 20:18:02,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:02,031 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:18:02,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:18:02,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1871825995, now seen corresponding path program 14 times [2022-03-03 20:18:02,031 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:18:02,031 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983319454] [2022-03-03 20:18:02,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:18:02,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:18:02,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:18:02,114 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:02,114 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:18:02,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983319454] [2022-03-03 20:18:02,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983319454] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:18:02,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181497752] [2022-03-03 20:18:02,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:18:02,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:02,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:18:02,115 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) [2022-03-03 20:18:02,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-03 20:18:02,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:18:02,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:18:02,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-03 20:18:02,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:18:02,217 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 20:18:02,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:18:02,275 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 20:18:02,275 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181497752] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:18:02,275 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:18:02,276 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 10 [2022-03-03 20:18:02,276 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298245598] [2022-03-03 20:18:02,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:18:02,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 20:18:02,277 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:18:02,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 20:18:02,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-03-03 20:18:02,277 INFO L87 Difference]: Start difference. First operand 186 states and 419 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:02,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:18:02,420 INFO L93 Difference]: Finished difference Result 359 states and 743 transitions. [2022-03-03 20:18:02,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 20:18:02,420 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-03 20:18:02,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:18:02,421 INFO L225 Difference]: With dead ends: 359 [2022-03-03 20:18:02,421 INFO L226 Difference]: Without dead ends: 352 [2022-03-03 20:18:02,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2022-03-03 20:18:02,422 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 115 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:18:02,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 60 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:18:02,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-03-03 20:18:02,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 212. [2022-03-03 20:18:02,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.3175355450236967) internal successors, (489), 211 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:02,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 489 transitions. [2022-03-03 20:18:02,428 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 489 transitions. Word has length 19 [2022-03-03 20:18:02,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:18:02,428 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 489 transitions. [2022-03-03 20:18:02,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:02,428 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 489 transitions. [2022-03-03 20:18:02,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 20:18:02,428 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:18:02,429 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:18:02,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-03 20:18:02,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:02,645 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:18:02,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:18:02,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1986926157, now seen corresponding path program 15 times [2022-03-03 20:18:02,646 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:18:02,646 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709597147] [2022-03-03 20:18:02,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:18:02,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:18:02,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:18:02,678 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:02,678 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:18:02,678 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709597147] [2022-03-03 20:18:02,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709597147] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:18:02,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366211903] [2022-03-03 20:18:02,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:18:02,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:02,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:18:02,680 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) [2022-03-03 20:18:02,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-03 20:18:02,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:18:02,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:18:02,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:18:02,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:18:02,819 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-03 20:18:02,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:18:02,963 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-03 20:18:02,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366211903] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:18:02,963 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:18:02,963 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2022-03-03 20:18:02,964 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911466762] [2022-03-03 20:18:02,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:18:02,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 20:18:02,964 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:18:02,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 20:18:02,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-03-03 20:18:02,965 INFO L87 Difference]: Start difference. First operand 212 states and 489 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 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) [2022-03-03 20:18:03,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:18:03,232 INFO L93 Difference]: Finished difference Result 262 states and 572 transitions. [2022-03-03 20:18:03,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 20:18:03,232 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 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 21 [2022-03-03 20:18:03,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:18:03,233 INFO L225 Difference]: With dead ends: 262 [2022-03-03 20:18:03,233 INFO L226 Difference]: Without dead ends: 190 [2022-03-03 20:18:03,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=306, Invalid=750, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 20:18:03,234 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 136 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:18:03,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 39 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:18:03,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-03-03 20:18:03,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2022-03-03 20:18:03,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.119718309859155) internal successors, (301), 142 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:03,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 301 transitions. [2022-03-03 20:18:03,237 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 301 transitions. Word has length 21 [2022-03-03 20:18:03,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:18:03,237 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 301 transitions. [2022-03-03 20:18:03,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 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) [2022-03-03 20:18:03,237 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 301 transitions. [2022-03-03 20:18:03,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 20:18:03,238 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:18:03,238 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:18:03,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-03 20:18:03,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:03,448 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:18:03,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:18:03,448 INFO L85 PathProgramCache]: Analyzing trace with hash -2070969793, now seen corresponding path program 16 times [2022-03-03 20:18:03,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:18:03,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878198332] [2022-03-03 20:18:03,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:18:03,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:18:03,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:18:03,474 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:03,474 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:18:03,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878198332] [2022-03-03 20:18:03,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878198332] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:18:03,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834924286] [2022-03-03 20:18:03,474 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:18:03,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:03,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:18:03,475 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) [2022-03-03 20:18:03,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-03 20:18:03,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:18:03,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:18:03,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:18:03,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:18:03,540 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:03,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:18:03,625 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:03,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834924286] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:18:03,626 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:18:03,626 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 7] total 10 [2022-03-03 20:18:03,626 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781061442] [2022-03-03 20:18:03,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:18:03,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 20:18:03,626 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:18:03,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 20:18:03,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-03 20:18:03,626 INFO L87 Difference]: Start difference. First operand 143 states and 301 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:03,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:18:03,812 INFO L93 Difference]: Finished difference Result 306 states and 566 transitions. [2022-03-03 20:18:03,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-03 20:18:03,813 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 20:18:03,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:18:03,814 INFO L225 Difference]: With dead ends: 306 [2022-03-03 20:18:03,814 INFO L226 Difference]: Without dead ends: 306 [2022-03-03 20:18:03,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=212, Invalid=388, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:18:03,815 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 134 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:18:03,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 56 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:18:03,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-03-03 20:18:03,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 170. [2022-03-03 20:18:03,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.1420118343195265) internal successors, (362), 169 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:03,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 362 transitions. [2022-03-03 20:18:03,819 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 362 transitions. Word has length 21 [2022-03-03 20:18:03,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:18:03,820 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 362 transitions. [2022-03-03 20:18:03,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:03,820 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 362 transitions. [2022-03-03 20:18:03,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 20:18:03,821 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:18:03,821 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:18:03,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-03 20:18:04,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:04,037 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:18:04,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:18:04,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1198203849, now seen corresponding path program 17 times [2022-03-03 20:18:04,038 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:18:04,038 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062138105] [2022-03-03 20:18:04,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:18:04,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:18:04,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:18:04,085 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:18:04,086 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:18:04,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062138105] [2022-03-03 20:18:04,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062138105] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:18:04,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55959726] [2022-03-03 20:18:04,086 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:18:04,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:04,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:18:04,087 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) [2022-03-03 20:18:04,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-03 20:18:04,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 20:18:04,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:18:04,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:18:04,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:18:04,149 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:18:04,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:18:04,251 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:04,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55959726] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:18:04,251 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:18:04,251 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 7] total 10 [2022-03-03 20:18:04,251 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807004746] [2022-03-03 20:18:04,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:18:04,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 20:18:04,251 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:18:04,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 20:18:04,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-03-03 20:18:04,252 INFO L87 Difference]: Start difference. First operand 170 states and 362 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:04,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:18:04,362 INFO L93 Difference]: Finished difference Result 256 states and 505 transitions. [2022-03-03 20:18:04,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 20:18:04,362 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 20:18:04,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:18:04,363 INFO L225 Difference]: With dead ends: 256 [2022-03-03 20:18:04,363 INFO L226 Difference]: Without dead ends: 256 [2022-03-03 20:18:04,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2022-03-03 20:18:04,364 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 101 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:18:04,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 32 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:18:04,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-03-03 20:18:04,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 188. [2022-03-03 20:18:04,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.1550802139037435) internal successors, (403), 187 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:04,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 403 transitions. [2022-03-03 20:18:04,368 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 403 transitions. Word has length 21 [2022-03-03 20:18:04,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:18:04,368 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 403 transitions. [2022-03-03 20:18:04,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:04,369 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 403 transitions. [2022-03-03 20:18:04,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 20:18:04,369 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:18:04,369 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:18:04,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-03 20:18:04,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:04,570 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:18:04,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:18:04,570 INFO L85 PathProgramCache]: Analyzing trace with hash 500673843, now seen corresponding path program 18 times [2022-03-03 20:18:04,570 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:18:04,570 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368238011] [2022-03-03 20:18:04,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:18:04,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:18:04,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:18:04,597 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:18:04,597 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:18:04,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368238011] [2022-03-03 20:18:04,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368238011] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:18:04,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618721328] [2022-03-03 20:18:04,598 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:18:04,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:04,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:18:04,599 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) [2022-03-03 20:18:04,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-03 20:18:04,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-03 20:18:04,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:18:04,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:18:04,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:18:04,654 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:18:04,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:18:04,743 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:04,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618721328] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:18:04,743 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:18:04,743 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 7] total 10 [2022-03-03 20:18:04,744 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964879871] [2022-03-03 20:18:04,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:18:04,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 20:18:04,746 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:18:04,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 20:18:04,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-03-03 20:18:04,746 INFO L87 Difference]: Start difference. First operand 188 states and 403 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:04,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:18:04,831 INFO L93 Difference]: Finished difference Result 239 states and 471 transitions. [2022-03-03 20:18:04,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 20:18:04,831 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 20:18:04,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:18:04,832 INFO L225 Difference]: With dead ends: 239 [2022-03-03 20:18:04,832 INFO L226 Difference]: Without dead ends: 235 [2022-03-03 20:18:04,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-03-03 20:18:04,833 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 88 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:18:04,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 30 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:18:04,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-03-03 20:18:04,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 164. [2022-03-03 20:18:04,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.1411042944785277) internal successors, (349), 163 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:04,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 349 transitions. [2022-03-03 20:18:04,836 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 349 transitions. Word has length 21 [2022-03-03 20:18:04,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:18:04,836 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 349 transitions. [2022-03-03 20:18:04,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:04,836 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 349 transitions. [2022-03-03 20:18:04,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 20:18:04,837 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:18:04,837 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:18:04,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-03 20:18:05,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:05,047 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:18:05,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:18:05,048 INFO L85 PathProgramCache]: Analyzing trace with hash -5672423, now seen corresponding path program 19 times [2022-03-03 20:18:05,048 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:18:05,048 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784817966] [2022-03-03 20:18:05,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:18:05,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:18:05,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:18:05,076 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:05,076 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:18:05,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784817966] [2022-03-03 20:18:05,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784817966] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:18:05,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124323537] [2022-03-03 20:18:05,077 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:18:05,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:05,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:18:05,078 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) [2022-03-03 20:18:05,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-03 20:18:05,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:18:05,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:18:05,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:18:05,143 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:05,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:18:05,232 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:05,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124323537] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:18:05,233 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:18:05,233 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 10 [2022-03-03 20:18:05,233 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149516663] [2022-03-03 20:18:05,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:18:05,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 20:18:05,233 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:18:05,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 20:18:05,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2022-03-03 20:18:05,234 INFO L87 Difference]: Start difference. First operand 164 states and 349 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:05,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:18:05,300 INFO L93 Difference]: Finished difference Result 203 states and 399 transitions. [2022-03-03 20:18:05,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 20:18:05,301 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:18:05,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:18:05,301 INFO L225 Difference]: With dead ends: 203 [2022-03-03 20:18:05,301 INFO L226 Difference]: Without dead ends: 197 [2022-03-03 20:18:05,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2022-03-03 20:18:05,302 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 82 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:18:05,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 24 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 20:18:05,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-03-03 20:18:05,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 166. [2022-03-03 20:18:05,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.1333333333333333) internal successors, (352), 165 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:05,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 352 transitions. [2022-03-03 20:18:05,305 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 352 transitions. Word has length 21 [2022-03-03 20:18:05,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:18:05,305 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 352 transitions. [2022-03-03 20:18:05,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:05,306 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 352 transitions. [2022-03-03 20:18:05,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 20:18:05,306 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:18:05,306 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:18:05,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-03 20:18:05,519 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,SelfDestructingSolverStorable23 [2022-03-03 20:18:05,519 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:18:05,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:18:05,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1150168965, now seen corresponding path program 20 times [2022-03-03 20:18:05,520 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:18:05,520 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244941504] [2022-03-03 20:18:05,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:18:05,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:18:05,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:18:05,544 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:18:05,545 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:18:05,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244941504] [2022-03-03 20:18:05,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244941504] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:18:05,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364736145] [2022-03-03 20:18:05,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:18:05,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:05,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:18:05,549 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) [2022-03-03 20:18:05,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-03 20:18:05,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:18:05,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:18:05,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:18:05,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:18:05,603 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:18:05,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:18:05,708 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:05,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364736145] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:18:05,708 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:18:05,709 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 10 [2022-03-03 20:18:05,709 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129737853] [2022-03-03 20:18:05,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:18:05,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 20:18:05,709 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:18:05,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 20:18:05,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-03-03 20:18:05,710 INFO L87 Difference]: Start difference. First operand 166 states and 352 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:05,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:18:05,828 INFO L93 Difference]: Finished difference Result 193 states and 387 transitions. [2022-03-03 20:18:05,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 20:18:05,829 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:18:05,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:18:05,829 INFO L225 Difference]: With dead ends: 193 [2022-03-03 20:18:05,829 INFO L226 Difference]: Without dead ends: 193 [2022-03-03 20:18:05,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=218, Unknown=0, NotChecked=0, Total=342 [2022-03-03 20:18:05,830 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 54 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:18:05,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 43 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:18:05,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-03-03 20:18:05,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 165. [2022-03-03 20:18:05,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.1158536585365852) internal successors, (347), 164 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:05,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 347 transitions. [2022-03-03 20:18:05,834 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 347 transitions. Word has length 21 [2022-03-03 20:18:05,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:18:05,834 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 347 transitions. [2022-03-03 20:18:05,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:05,834 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 347 transitions. [2022-03-03 20:18:05,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 20:18:05,835 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:18:05,835 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:18:05,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-03 20:18:06,049 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,SelfDestructingSolverStorable24 [2022-03-03 20:18:06,049 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:18:06,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:18:06,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1742479817, now seen corresponding path program 21 times [2022-03-03 20:18:06,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:18:06,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350038023] [2022-03-03 20:18:06,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:18:06,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:18:06,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:18:06,083 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:18:06,083 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:18:06,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350038023] [2022-03-03 20:18:06,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350038023] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:18:06,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130075661] [2022-03-03 20:18:06,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:18:06,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:06,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:18:06,100 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) [2022-03-03 20:18:06,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-03 20:18:06,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 20:18:06,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:18:06,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:18:06,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:18:06,232 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 20:18:06,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-03 20:18:06,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130075661] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 20:18:06,232 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-03 20:18:06,232 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2022-03-03 20:18:06,232 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211637976] [2022-03-03 20:18:06,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 20:18:06,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-03 20:18:06,232 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:18:06,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-03 20:18:06,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-03-03 20:18:06,233 INFO L87 Difference]: Start difference. First operand 165 states and 347 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:06,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:18:06,293 INFO L93 Difference]: Finished difference Result 284 states and 577 transitions. [2022-03-03 20:18:06,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 20:18:06,294 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 20:18:06,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:18:06,294 INFO L225 Difference]: With dead ends: 284 [2022-03-03 20:18:06,294 INFO L226 Difference]: Without dead ends: 134 [2022-03-03 20:18:06,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-03-03 20:18:06,295 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:18:06,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 31 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 20:18:06,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-03-03 20:18:06,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 98. [2022-03-03 20:18:06,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.6701030927835052) internal successors, (162), 97 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:06,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 162 transitions. [2022-03-03 20:18:06,297 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 162 transitions. Word has length 21 [2022-03-03 20:18:06,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:18:06,297 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 162 transitions. [2022-03-03 20:18:06,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:06,297 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 162 transitions. [2022-03-03 20:18:06,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 20:18:06,297 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:18:06,297 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:18:06,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-03 20:18:06,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-03 20:18:06,514 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:18:06,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:18:06,514 INFO L85 PathProgramCache]: Analyzing trace with hash 490287407, now seen corresponding path program 22 times [2022-03-03 20:18:06,514 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:18:06,514 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065065446] [2022-03-03 20:18:06,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:18:06,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:18:06,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:18:06,556 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:18:06,556 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:18:06,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065065446] [2022-03-03 20:18:06,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065065446] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:18:06,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948930810] [2022-03-03 20:18:06,556 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:18:06,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:06,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:18:06,558 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) [2022-03-03 20:18:06,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-03 20:18:06,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:18:06,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:18:06,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:18:06,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:18:06,606 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:18:06,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:18:06,693 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:06,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948930810] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:18:06,693 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:18:06,693 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 10 [2022-03-03 20:18:06,694 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179990799] [2022-03-03 20:18:06,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:18:06,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 20:18:06,694 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:18:06,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 20:18:06,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2022-03-03 20:18:06,695 INFO L87 Difference]: Start difference. First operand 98 states and 162 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:06,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:18:06,763 INFO L93 Difference]: Finished difference Result 136 states and 216 transitions. [2022-03-03 20:18:06,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 20:18:06,763 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 20:18:06,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:18:06,764 INFO L225 Difference]: With dead ends: 136 [2022-03-03 20:18:06,764 INFO L226 Difference]: Without dead ends: 130 [2022-03-03 20:18:06,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2022-03-03 20:18:06,764 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 87 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:18:06,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 19 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 20:18:06,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-03-03 20:18:06,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 99. [2022-03-03 20:18:06,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.683673469387755) internal successors, (165), 98 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:06,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 165 transitions. [2022-03-03 20:18:06,767 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 165 transitions. Word has length 21 [2022-03-03 20:18:06,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:18:06,767 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 165 transitions. [2022-03-03 20:18:06,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:06,767 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 165 transitions. [2022-03-03 20:18:06,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 20:18:06,767 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:18:06,767 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:18:06,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-03 20:18:06,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:06,983 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:18:06,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:18:06,983 INFO L85 PathProgramCache]: Analyzing trace with hash -777169771, now seen corresponding path program 23 times [2022-03-03 20:18:06,983 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:18:06,983 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851196786] [2022-03-03 20:18:06,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:18:06,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:18:06,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:18:07,023 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:07,024 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:18:07,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851196786] [2022-03-03 20:18:07,024 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851196786] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:18:07,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260397841] [2022-03-03 20:18:07,024 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:18:07,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:07,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:18:07,025 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) [2022-03-03 20:18:07,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-03 20:18:07,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 20:18:07,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:18:07,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:18:07,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:18:07,077 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:07,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:18:07,162 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:07,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260397841] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:18:07,162 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:18:07,162 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-03 20:18:07,162 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070628681] [2022-03-03 20:18:07,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:18:07,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 20:18:07,163 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:18:07,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 20:18:07,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2022-03-03 20:18:07,163 INFO L87 Difference]: Start difference. First operand 99 states and 165 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:07,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:18:07,220 INFO L93 Difference]: Finished difference Result 116 states and 187 transitions. [2022-03-03 20:18:07,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 20:18:07,221 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:18:07,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:18:07,221 INFO L225 Difference]: With dead ends: 116 [2022-03-03 20:18:07,221 INFO L226 Difference]: Without dead ends: 106 [2022-03-03 20:18:07,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2022-03-03 20:18:07,222 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 32 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:18:07,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 21 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 20:18:07,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-03-03 20:18:07,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2022-03-03 20:18:07,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.6633663366336633) internal successors, (168), 101 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:07,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 168 transitions. [2022-03-03 20:18:07,225 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 168 transitions. Word has length 21 [2022-03-03 20:18:07,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:18:07,225 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 168 transitions. [2022-03-03 20:18:07,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:07,225 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 168 transitions. [2022-03-03 20:18:07,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 20:18:07,225 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:18:07,225 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:18:07,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-03 20:18:07,426 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,SelfDestructingSolverStorable27 [2022-03-03 20:18:07,426 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:18:07,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:18:07,426 INFO L85 PathProgramCache]: Analyzing trace with hash 621827521, now seen corresponding path program 24 times [2022-03-03 20:18:07,426 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:18:07,426 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955318107] [2022-03-03 20:18:07,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:18:07,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:18:07,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:18:07,520 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:07,520 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:18:07,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955318107] [2022-03-03 20:18:07,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955318107] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:18:07,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506440200] [2022-03-03 20:18:07,520 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:18:07,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:07,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:18:07,521 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) [2022-03-03 20:18:07,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-03 20:18:07,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 20:18:07,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:18:07,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-03 20:18:07,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:18:07,662 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:18:07,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:18:07,749 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:18:07,749 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506440200] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:18:07,749 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:18:07,749 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 13 [2022-03-03 20:18:07,749 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268998803] [2022-03-03 20:18:07,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:18:07,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 20:18:07,750 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:18:07,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 20:18:07,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-03-03 20:18:07,750 INFO L87 Difference]: Start difference. First operand 102 states and 168 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:07,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:18:07,945 INFO L93 Difference]: Finished difference Result 244 states and 371 transitions. [2022-03-03 20:18:07,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 20:18:07,945 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 20:18:07,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:18:07,946 INFO L225 Difference]: With dead ends: 244 [2022-03-03 20:18:07,946 INFO L226 Difference]: Without dead ends: 237 [2022-03-03 20:18:07,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2022-03-03 20:18:07,947 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 168 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:18:07,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 95 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:18:07,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-03-03 20:18:07,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 119. [2022-03-03 20:18:07,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.6864406779661016) internal successors, (199), 118 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:07,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 199 transitions. [2022-03-03 20:18:07,949 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 199 transitions. Word has length 23 [2022-03-03 20:18:07,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:18:07,950 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 199 transitions. [2022-03-03 20:18:07,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:07,950 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 199 transitions. [2022-03-03 20:18:07,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 20:18:07,950 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:18:07,950 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:18:07,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-03 20:18:08,150 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,SelfDestructingSolverStorable28 [2022-03-03 20:18:08,151 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:18:08,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:18:08,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1016577013, now seen corresponding path program 25 times [2022-03-03 20:18:08,151 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:18:08,151 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237848955] [2022-03-03 20:18:08,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:18:08,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:18:08,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:18:08,249 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:08,250 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:18:08,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237848955] [2022-03-03 20:18:08,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237848955] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:18:08,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848580521] [2022-03-03 20:18:08,250 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:18:08,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:08,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:18:08,251 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) [2022-03-03 20:18:08,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-03 20:18:08,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:18:08,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-03 20:18:08,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:18:08,368 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 20:18:08,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:18:08,453 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 20:18:08,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848580521] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:18:08,453 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:18:08,453 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 10 [2022-03-03 20:18:08,453 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986959894] [2022-03-03 20:18:08,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:18:08,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 20:18:08,453 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:18:08,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 20:18:08,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-03-03 20:18:08,454 INFO L87 Difference]: Start difference. First operand 119 states and 199 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:08,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:18:08,636 INFO L93 Difference]: Finished difference Result 191 states and 305 transitions. [2022-03-03 20:18:08,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 20:18:08,636 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 20:18:08,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:18:08,637 INFO L225 Difference]: With dead ends: 191 [2022-03-03 20:18:08,637 INFO L226 Difference]: Without dead ends: 184 [2022-03-03 20:18:08,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-03-03 20:18:08,638 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 47 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:18:08,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 96 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:18:08,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-03-03 20:18:08,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 103. [2022-03-03 20:18:08,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.696078431372549) internal successors, (173), 102 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:08,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 173 transitions. [2022-03-03 20:18:08,640 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 173 transitions. Word has length 23 [2022-03-03 20:18:08,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:18:08,640 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 173 transitions. [2022-03-03 20:18:08,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:08,641 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 173 transitions. [2022-03-03 20:18:08,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 20:18:08,641 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:18:08,641 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:18:08,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-03 20:18:08,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:08,851 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:18:08,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:18:08,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1458081807, now seen corresponding path program 26 times [2022-03-03 20:18:08,852 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:18:08,852 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111023233] [2022-03-03 20:18:08,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:18:08,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:18:08,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:18:08,915 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:08,915 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:18:08,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111023233] [2022-03-03 20:18:08,915 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111023233] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:18:08,916 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391812297] [2022-03-03 20:18:08,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:18:08,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:08,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:18:08,917 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) [2022-03-03 20:18:08,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-03 20:18:08,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:18:08,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:18:08,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-03 20:18:08,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:18:09,049 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 20:18:09,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:18:09,137 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 20:18:09,138 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391812297] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:18:09,138 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:18:09,138 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2022-03-03 20:18:09,138 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711897111] [2022-03-03 20:18:09,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:18:09,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 20:18:09,138 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:18:09,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 20:18:09,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-03-03 20:18:09,139 INFO L87 Difference]: Start difference. First operand 103 states and 173 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:09,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:18:09,292 INFO L93 Difference]: Finished difference Result 190 states and 304 transitions. [2022-03-03 20:18:09,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 20:18:09,292 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 20:18:09,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:18:09,293 INFO L225 Difference]: With dead ends: 190 [2022-03-03 20:18:09,293 INFO L226 Difference]: Without dead ends: 183 [2022-03-03 20:18:09,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2022-03-03 20:18:09,293 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 45 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:18:09,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 72 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:18:09,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-03-03 20:18:09,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 103. [2022-03-03 20:18:09,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.696078431372549) internal successors, (173), 102 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:09,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 173 transitions. [2022-03-03 20:18:09,296 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 173 transitions. Word has length 23 [2022-03-03 20:18:09,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:18:09,296 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 173 transitions. [2022-03-03 20:18:09,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:09,296 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 173 transitions. [2022-03-03 20:18:09,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 20:18:09,296 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:18:09,296 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:18:09,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-03 20:18:09,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:09,507 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:18:09,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:18:09,508 INFO L85 PathProgramCache]: Analyzing trace with hash -193325843, now seen corresponding path program 27 times [2022-03-03 20:18:09,508 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:18:09,508 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546285213] [2022-03-03 20:18:09,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:18:09,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:18:09,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:18:09,581 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:09,581 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:18:09,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546285213] [2022-03-03 20:18:09,581 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546285213] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:18:09,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579320158] [2022-03-03 20:18:09,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:18:09,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:09,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:18:09,582 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) [2022-03-03 20:18:09,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-03 20:18:09,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 20:18:09,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:18:09,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:18:09,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:18:09,725 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-03 20:18:09,725 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-03 20:18:09,725 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579320158] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 20:18:09,725 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-03 20:18:09,725 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 17 [2022-03-03 20:18:09,725 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695104320] [2022-03-03 20:18:09,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 20:18:09,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-03 20:18:09,725 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:18:09,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-03 20:18:09,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2022-03-03 20:18:09,726 INFO L87 Difference]: Start difference. First operand 103 states and 173 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:09,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:18:09,746 INFO L93 Difference]: Finished difference Result 122 states and 201 transitions. [2022-03-03 20:18:09,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-03 20:18:09,746 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 20:18:09,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:18:09,746 INFO L225 Difference]: With dead ends: 122 [2022-03-03 20:18:09,746 INFO L226 Difference]: Without dead ends: 63 [2022-03-03 20:18:09,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2022-03-03 20:18:09,747 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 31 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:18:09,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 37 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 20:18:09,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-03 20:18:09,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2022-03-03 20:18:09,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.6206896551724137) internal successors, (94), 58 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) [2022-03-03 20:18:09,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 94 transitions. [2022-03-03 20:18:09,750 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 94 transitions. Word has length 23 [2022-03-03 20:18:09,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:18:09,750 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 94 transitions. [2022-03-03 20:18:09,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:09,750 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 94 transitions. [2022-03-03 20:18:09,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 20:18:09,750 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:18:09,750 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:18:09,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-03 20:18:09,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:09,966 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:18:09,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:18:09,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1070483721, now seen corresponding path program 28 times [2022-03-03 20:18:09,967 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:18:09,967 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705572384] [2022-03-03 20:18:09,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:18:09,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:18:09,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:18:10,006 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:10,006 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:18:10,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705572384] [2022-03-03 20:18:10,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705572384] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:18:10,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323581239] [2022-03-03 20:18:10,007 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:18:10,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:10,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:18:10,008 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) [2022-03-03 20:18:10,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:18:10,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:18:10,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:18:10,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:18:10,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-03 20:18:10,070 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:10,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:18:10,153 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:10,154 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323581239] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:18:10,154 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:18:10,154 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-03-03 20:18:10,154 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398142094] [2022-03-03 20:18:10,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:18:10,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 20:18:10,154 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:18:10,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 20:18:10,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-03-03 20:18:10,155 INFO L87 Difference]: Start difference. First operand 59 states and 94 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:10,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:18:10,277 INFO L93 Difference]: Finished difference Result 86 states and 125 transitions. [2022-03-03 20:18:10,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 20:18:10,277 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 20:18:10,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:18:10,277 INFO L225 Difference]: With dead ends: 86 [2022-03-03 20:18:10,277 INFO L226 Difference]: Without dead ends: 86 [2022-03-03 20:18:10,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=168, Invalid=338, Unknown=0, NotChecked=0, Total=506 [2022-03-03 20:18:10,278 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 41 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:18:10,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 50 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:18:10,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-03 20:18:10,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 60. [2022-03-03 20:18:10,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.6101694915254237) internal successors, (95), 59 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) [2022-03-03 20:18:10,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 95 transitions. [2022-03-03 20:18:10,281 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 95 transitions. Word has length 25 [2022-03-03 20:18:10,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:18:10,281 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 95 transitions. [2022-03-03 20:18:10,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:10,281 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 95 transitions. [2022-03-03 20:18:10,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 20:18:10,282 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:18:10,282 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:18:10,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-03 20:18:10,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:10,499 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:18:10,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:18:10,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1772129981, now seen corresponding path program 29 times [2022-03-03 20:18:10,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:18:10,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945574246] [2022-03-03 20:18:10,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:18:10,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:18:10,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:18:10,531 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:10,532 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:18:10,532 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945574246] [2022-03-03 20:18:10,532 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945574246] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:18:10,532 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056806948] [2022-03-03 20:18:10,532 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:18:10,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:10,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:18:10,534 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) [2022-03-03 20:18:10,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-03 20:18:10,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:18:10,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:18:10,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:18:10,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-03 20:18:10,596 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:10,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:18:10,729 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:10,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056806948] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:18:10,729 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:18:10,729 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 9] total 13 [2022-03-03 20:18:10,729 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114337823] [2022-03-03 20:18:10,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:18:10,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 20:18:10,730 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:18:10,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 20:18:10,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-03-03 20:18:10,730 INFO L87 Difference]: Start difference. First operand 60 states and 95 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:10,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:18:10,845 INFO L93 Difference]: Finished difference Result 109 states and 155 transitions. [2022-03-03 20:18:10,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 20:18:10,846 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 20:18:10,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:18:10,846 INFO L225 Difference]: With dead ends: 109 [2022-03-03 20:18:10,846 INFO L226 Difference]: Without dead ends: 97 [2022-03-03 20:18:10,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2022-03-03 20:18:10,847 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 115 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:18:10,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 35 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:18:10,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-03 20:18:10,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 64. [2022-03-03 20:18:10,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.507936507936508) internal successors, (95), 63 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) [2022-03-03 20:18:10,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 95 transitions. [2022-03-03 20:18:10,848 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 95 transitions. Word has length 25 [2022-03-03 20:18:10,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:18:10,848 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 95 transitions. [2022-03-03 20:18:10,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:10,848 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 95 transitions. [2022-03-03 20:18:10,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 20:18:10,849 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:18:10,849 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:18:10,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-03 20:18:11,049 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,SelfDestructingSolverStorable33 [2022-03-03 20:18:11,049 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:18:11,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:18:11,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1687768123, now seen corresponding path program 30 times [2022-03-03 20:18:11,050 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:18:11,050 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362360264] [2022-03-03 20:18:11,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:18:11,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:18:11,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:18:11,142 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:11,142 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:18:11,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362360264] [2022-03-03 20:18:11,142 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362360264] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:18:11,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705161955] [2022-03-03 20:18:11,142 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:18:11,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:11,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:18:11,144 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) [2022-03-03 20:18:11,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-03 20:18:11,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-03 20:18:11,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:18:11,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-03 20:18:11,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:18:11,300 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:18:11,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:18:11,390 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:18:11,390 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705161955] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:18:11,390 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:18:11,390 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 16 [2022-03-03 20:18:11,390 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408016390] [2022-03-03 20:18:11,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:18:11,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 20:18:11,390 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:18:11,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 20:18:11,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2022-03-03 20:18:11,391 INFO L87 Difference]: Start difference. First operand 64 states and 95 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:11,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:18:11,609 INFO L93 Difference]: Finished difference Result 149 states and 213 transitions. [2022-03-03 20:18:11,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-03 20:18:11,610 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:18:11,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:18:11,610 INFO L225 Difference]: With dead ends: 149 [2022-03-03 20:18:11,610 INFO L226 Difference]: Without dead ends: 140 [2022-03-03 20:18:11,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:18:11,611 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 113 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:18:11,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 52 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:18:11,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-03-03 20:18:11,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 84. [2022-03-03 20:18:11,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.5662650602409638) internal successors, (130), 83 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:11,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 130 transitions. [2022-03-03 20:18:11,613 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 130 transitions. Word has length 27 [2022-03-03 20:18:11,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:18:11,613 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 130 transitions. [2022-03-03 20:18:11,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:11,613 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 130 transitions. [2022-03-03 20:18:11,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 20:18:11,613 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:18:11,613 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:18:11,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-03 20:18:11,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:11,814 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:18:11,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:18:11,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1342707531, now seen corresponding path program 31 times [2022-03-03 20:18:11,814 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:18:11,814 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506596681] [2022-03-03 20:18:11,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:18:11,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:18:11,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:18:11,922 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:11,922 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:18:11,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506596681] [2022-03-03 20:18:11,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506596681] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:18:11,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184840172] [2022-03-03 20:18:11,922 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:18:11,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:11,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:18:11,924 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) [2022-03-03 20:18:11,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-03 20:18:11,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:18:11,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-03 20:18:11,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:18:12,068 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 20:18:12,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:18:12,158 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 20:18:12,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184840172] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:18:12,159 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:18:12,159 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 12 [2022-03-03 20:18:12,159 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701835855] [2022-03-03 20:18:12,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:18:12,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 20:18:12,159 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:18:12,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 20:18:12,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-03-03 20:18:12,160 INFO L87 Difference]: Start difference. First operand 84 states and 130 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:12,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:18:12,354 INFO L93 Difference]: Finished difference Result 108 states and 161 transitions. [2022-03-03 20:18:12,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 20:18:12,355 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 20:18:12,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:18:12,355 INFO L225 Difference]: With dead ends: 108 [2022-03-03 20:18:12,355 INFO L226 Difference]: Without dead ends: 73 [2022-03-03 20:18:12,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-03-03 20:18:12,356 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 33 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:18:12,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 45 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:18:12,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-03 20:18:12,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-03-03 20:18:12,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.5833333333333333) internal successors, (114), 72 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:12,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 114 transitions. [2022-03-03 20:18:12,358 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 114 transitions. Word has length 27 [2022-03-03 20:18:12,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:18:12,358 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 114 transitions. [2022-03-03 20:18:12,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:12,358 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 114 transitions. [2022-03-03 20:18:12,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-03 20:18:12,358 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:18:12,358 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:18:12,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-03 20:18:12,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:12,567 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:18:12,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:18:12,568 INFO L85 PathProgramCache]: Analyzing trace with hash 907508287, now seen corresponding path program 32 times [2022-03-03 20:18:12,568 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:18:12,568 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257765591] [2022-03-03 20:18:12,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:18:12,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:18:12,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:18:12,615 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:12,616 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:18:12,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257765591] [2022-03-03 20:18:12,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257765591] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:18:12,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060237038] [2022-03-03 20:18:12,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:18:12,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:12,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:18:12,617 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) [2022-03-03 20:18:12,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-03 20:18:12,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:18:12,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:18:12,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-03 20:18:12,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:18:12,696 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:12,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:18:12,789 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:12,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060237038] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:18:12,789 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:18:12,789 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-03-03 20:18:12,789 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500959985] [2022-03-03 20:18:12,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:18:12,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 20:18:12,790 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:18:12,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 20:18:12,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2022-03-03 20:18:12,790 INFO L87 Difference]: Start difference. First operand 73 states and 114 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:12,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:18:12,929 INFO L93 Difference]: Finished difference Result 103 states and 148 transitions. [2022-03-03 20:18:12,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 20:18:12,929 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-03 20:18:12,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:18:12,929 INFO L225 Difference]: With dead ends: 103 [2022-03-03 20:18:12,929 INFO L226 Difference]: Without dead ends: 103 [2022-03-03 20:18:12,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=242, Invalid=514, Unknown=0, NotChecked=0, Total=756 [2022-03-03 20:18:12,930 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 56 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:18:12,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 31 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:18:12,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-03 20:18:12,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 70. [2022-03-03 20:18:12,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.608695652173913) internal successors, (111), 69 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:12,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 111 transitions. [2022-03-03 20:18:12,931 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 111 transitions. Word has length 29 [2022-03-03 20:18:12,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:18:12,932 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 111 transitions. [2022-03-03 20:18:12,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:12,932 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 111 transitions. [2022-03-03 20:18:12,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-03 20:18:12,932 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:18:12,932 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:18:12,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-03 20:18:13,132 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,SelfDestructingSolverStorable36 [2022-03-03 20:18:13,133 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 20:18:13,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:18:13,133 INFO L85 PathProgramCache]: Analyzing trace with hash -795451833, now seen corresponding path program 33 times [2022-03-03 20:18:13,133 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:18:13,133 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919251823] [2022-03-03 20:18:13,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:18:13,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:18:13,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:18:13,174 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:13,174 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:18:13,174 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919251823] [2022-03-03 20:18:13,174 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919251823] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:18:13,174 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762949500] [2022-03-03 20:18:13,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:18:13,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:13,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:18:13,196 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) [2022-03-03 20:18:13,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-03 20:18:13,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 20:18:13,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:18:13,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:18:13,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:18:13,326 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-03 20:18:13,326 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-03 20:18:13,326 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762949500] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 20:18:13,326 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-03 20:18:13,326 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2022-03-03 20:18:13,326 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833639155] [2022-03-03 20:18:13,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 20:18:13,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-03 20:18:13,327 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:18:13,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-03 20:18:13,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-03-03 20:18:13,328 INFO L87 Difference]: Start difference. First operand 70 states and 111 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:13,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:18:13,377 INFO L93 Difference]: Finished difference Result 68 states and 109 transitions. [2022-03-03 20:18:13,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 20:18:13,377 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-03 20:18:13,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:18:13,378 INFO L225 Difference]: With dead ends: 68 [2022-03-03 20:18:13,378 INFO L226 Difference]: Without dead ends: 0 [2022-03-03 20:18:13,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2022-03-03 20:18:13,378 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 22 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:18:13,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 17 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 20:18:13,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-03 20:18:13,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-03 20:18:13,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:13,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-03 20:18:13,379 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2022-03-03 20:18:13,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:18:13,379 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-03 20:18:13,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:13,379 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-03 20:18:13,379 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-03 20:18:13,381 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-03-03 20:18:13,381 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-03-03 20:18:13,381 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-03-03 20:18:13,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-03 20:18:13,584 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,SelfDestructingSolverStorable37 [2022-03-03 20:18:13,586 INFO L732 BasicCegarLoop]: Path program histogram: [33, 2, 2, 1] [2022-03-03 20:18:13,588 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-03 20:18:13,588 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-03 20:18:13,589 INFO L202 PluginConnector]: Adding new model easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.03 08:18:13 BasicIcfg [2022-03-03 20:18:13,589 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-03 20:18:13,589 INFO L158 Benchmark]: Toolchain (without parser) took 19318.16ms. Allocated memory was 169.9MB in the beginning and 242.2MB in the end (delta: 72.4MB). Free memory was 125.0MB in the beginning and 161.8MB in the end (delta: -36.8MB). Peak memory consumption was 36.5MB. Max. memory is 8.0GB. [2022-03-03 20:18:13,590 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.10ms. Allocated memory is still 169.9MB. Free memory is still 126.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-03 20:18:13,590 INFO L158 Benchmark]: Boogie Procedure Inliner took 17.52ms. Allocated memory is still 169.9MB. Free memory was 124.9MB in the beginning and 123.4MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-03 20:18:13,590 INFO L158 Benchmark]: Boogie Preprocessor took 11.62ms. Allocated memory is still 169.9MB. Free memory was 123.3MB in the beginning and 122.4MB in the end (delta: 887.3kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-03 20:18:13,590 INFO L158 Benchmark]: RCFGBuilder took 193.92ms. Allocated memory is still 169.9MB. Free memory was 122.4MB in the beginning and 114.1MB in the end (delta: 8.3MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-03 20:18:13,590 INFO L158 Benchmark]: TraceAbstraction took 19070.62ms. Allocated memory was 169.9MB in the beginning and 242.2MB in the end (delta: 72.4MB). Free memory was 113.6MB in the beginning and 161.8MB in the end (delta: -48.2MB). Peak memory consumption was 24.9MB. Max. memory is 8.0GB. [2022-03-03 20:18:13,590 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 0.10ms. Allocated memory is still 169.9MB. Free memory is still 126.0MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 17.52ms. Allocated memory is still 169.9MB. Free memory was 124.9MB in the beginning and 123.4MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 11.62ms. Allocated memory is still 169.9MB. Free memory was 123.3MB in the beginning and 122.4MB in the end (delta: 887.3kB). There was no memory consumed. Max. memory is 8.0GB. * RCFGBuilder took 193.92ms. Allocated memory is still 169.9MB. Free memory was 122.4MB in the beginning and 114.1MB in the end (delta: 8.3MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 19070.62ms. Allocated memory was 169.9MB in the beginning and 242.2MB in the end (delta: 72.4MB). Free memory was 113.6MB in the beginning and 161.8MB in the end (delta: -48.2MB). Peak memory consumption was 24.9MB. 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 - PositiveResult [Line: 37]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 28 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 19.0s, OverallIterations: 38, TraceHistogramMax: 5, PathProgramHistogramMax: 33, EmptinessCheckTime: 0.0s, AutomataDifference: 4.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2541 SdHoareTripleChecker+Valid, 2.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2541 mSDsluCounter, 1398 SdHoareTripleChecker+Invalid, 1.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2146 mSDsCounter, 738 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4788 IncrementalHoareTripleChecker+Invalid, 5526 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 738 mSolverCounterUnsat, 362 mSDtfsCounter, 4788 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1701 GetRequests, 1145 SyntacticMatches, 57 SemanticMatches, 499 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 3.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=212occurred in iteration=19, InterpolantAutomatonStates: 454, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 38 MinimizatonAttempts, 1903 StatesRemovedByMinimization, 36 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 6.2s InterpolantComputationTime, 1442 NumberOfCodeBlocks, 1426 NumberOfCodeBlocksAsserted, 133 NumberOfCheckSat, 1948 ConstructedInterpolants, 0 QuantifiedInterpolants, 9358 SizeOfPredicates, 49 NumberOfNonLiveVariables, 1241 ConjunctsInSsa, 284 ConjunctsInUnsatCore, 102 InterpolantComputations, 9 PerfectInterpolantSequences, 577/1306 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-03-03 20:18:13,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...