/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-MCRwithDepranks-BasicCegarLoop.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/bigNumberOfThreads.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-44898dd [2022-02-10 02:44:54,141 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-10 02:44:54,143 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-10 02:44:54,220 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-10 02:44:54,280 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-MCRwithDepranks-BasicCegarLoop.epf [2022-02-10 02:44:54,298 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-10 02:44:54,298 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-10 02:44:54,298 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-10 02:44:54,299 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-10 02:44:54,299 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-10 02:44:54,299 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-10 02:44:54,300 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-10 02:44:54,300 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-10 02:44:54,300 INFO L138 SettingsManager]: * Use SBE=true [2022-02-10 02:44:54,300 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-10 02:44:54,300 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-10 02:44:54,300 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-10 02:44:54,301 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-10 02:44:54,301 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-10 02:44:54,301 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-10 02:44:54,301 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-10 02:44:54,301 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-10 02:44:54,301 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-10 02:44:54,301 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-10 02:44:54,301 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-10 02:44:54,302 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-10 02:44:54,302 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-10 02:44:54,302 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-10 02:44:54,302 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-10 02:44:54,302 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-10 02:44:54,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-10 02:44:54,302 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-10 02:44:54,303 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-10 02:44:54,303 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-10 02:44:54,303 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-10 02:44:54,303 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-10 02:44:54,303 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-10 02:44:54,303 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-10 02:44:54,303 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=MCR_WITH_DEPRANKS [2022-02-10 02:44:54,303 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-10 02:44:54,532 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-10 02:44:54,553 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-10 02:44:54,555 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-10 02:44:54,556 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-10 02:44:54,560 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-10 02:44:54,561 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/bigNumberOfThreads.bpl [2022-02-10 02:44:54,562 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/bigNumberOfThreads.bpl' [2022-02-10 02:44:54,582 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-10 02:44:54,584 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-10 02:44:54,584 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-10 02:44:54,585 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-10 02:44:54,585 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-10 02:44:54,596 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "bigNumberOfThreads.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 02:44:54" (1/1) ... [2022-02-10 02:44:54,602 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "bigNumberOfThreads.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 02:44:54" (1/1) ... [2022-02-10 02:44:54,610 INFO L137 Inliner]: procedures = 2, calls = 1, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-10 02:44:54,611 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-10 02:44:54,613 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-10 02:44:54,613 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-10 02:44:54,613 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-10 02:44:54,619 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "bigNumberOfThreads.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 02:44:54" (1/1) ... [2022-02-10 02:44:54,619 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "bigNumberOfThreads.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 02:44:54" (1/1) ... [2022-02-10 02:44:54,620 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "bigNumberOfThreads.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 02:44:54" (1/1) ... [2022-02-10 02:44:54,620 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "bigNumberOfThreads.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 02:44:54" (1/1) ... [2022-02-10 02:44:54,622 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "bigNumberOfThreads.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 02:44:54" (1/1) ... [2022-02-10 02:44:54,624 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "bigNumberOfThreads.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 02:44:54" (1/1) ... [2022-02-10 02:44:54,625 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "bigNumberOfThreads.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 02:44:54" (1/1) ... [2022-02-10 02:44:54,625 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-10 02:44:54,626 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-10 02:44:54,626 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-10 02:44:54,626 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-10 02:44:54,630 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "bigNumberOfThreads.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 02:44:54" (1/1) ... [2022-02-10 02:44:54,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-10 02:44:54,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:44:54,669 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) [2022-02-10 02:44:54,697 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 [2022-02-10 02:44:54,729 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-10 02:44:54,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-10 02:44:54,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-10 02:44:54,729 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread given in one single declaration [2022-02-10 02:44:54,729 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2022-02-10 02:44:54,730 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2022-02-10 02:44:54,730 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-10 02:44:54,773 INFO L234 CfgBuilder]: Building ICFG [2022-02-10 02:44:54,775 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-10 02:44:54,852 INFO L275 CfgBuilder]: Performing block encoding [2022-02-10 02:44:54,860 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-10 02:44:54,860 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-10 02:44:54,862 INFO L202 PluginConnector]: Adding new model bigNumberOfThreads.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.02 02:44:54 BoogieIcfgContainer [2022-02-10 02:44:54,863 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-10 02:44:54,866 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-10 02:44:54,866 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-10 02:44:54,870 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-10 02:44:54,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bigNumberOfThreads.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 02:44:54" (1/2) ... [2022-02-10 02:44:54,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41db6513 and model type bigNumberOfThreads.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.02 02:44:54, skipping insertion in model container [2022-02-10 02:44:54,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bigNumberOfThreads.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.02 02:44:54" (2/2) ... [2022-02-10 02:44:54,875 INFO L111 eAbstractionObserver]: Analyzing ICFG bigNumberOfThreads.bpl [2022-02-10 02:44:54,891 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-10 02:44:54,891 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-10 02:44:54,891 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-10 02:44:54,891 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-10 02:44:54,932 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-02-10 02:44:54,982 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-10 02:44:54,992 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 [2022-02-10 02:44:54,992 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-02-10 02:44:55,001 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 15 places, 12 transitions, 29 flow [2022-02-10 02:44:55,019 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 24 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:44:55,060 INFO L104 alCausalityReduction]: MaximalCausalityReduction evaluated 34 transitions and produced 26 states. [2022-02-10 02:44:55,082 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 25 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) [2022-02-10 02:44:55,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-02-10 02:44:55,089 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:44:55,090 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2022-02-10 02:44:55,090 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION] === [2022-02-10 02:44:55,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:44:55,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1418148, now seen corresponding path program 1 times [2022-02-10 02:44:55,104 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:44:55,104 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750268178] [2022-02-10 02:44:55,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:44:55,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:44:55,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:44:55,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:44:55,203 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:44:55,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750268178] [2022-02-10 02:44:55,204 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750268178] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 02:44:55,205 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-10 02:44:55,205 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-10 02:44:55,206 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300513067] [2022-02-10 02:44:55,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 02:44:55,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-10 02:44:55,210 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:44:55,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-10 02:44:55,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-10 02:44:55,232 INFO L87 Difference]: Start difference. First operand has 26 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 25 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) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:44:55,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:44:55,251 INFO L93 Difference]: Finished difference Result 24 states and 23 transitions. [2022-02-10 02:44:55,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-10 02:44:55,254 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-02-10 02:44:55,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:44:55,260 INFO L225 Difference]: With dead ends: 24 [2022-02-10 02:44:55,260 INFO L226 Difference]: Without dead ends: 17 [2022-02-10 02:44:55,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-10 02:44:55,265 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 02:44:55,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 12 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 02:44:55,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-02-10 02:44:55,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2022-02-10 02:44:55,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 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) [2022-02-10 02:44:55,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-02-10 02:44:55,299 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 4 [2022-02-10 02:44:55,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:44:55,299 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-02-10 02:44:55,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:44:55,300 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-02-10 02:44:55,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-02-10 02:44:55,300 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:44:55,300 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2022-02-10 02:44:55,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-10 02:44:55,301 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION] === [2022-02-10 02:44:55,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:44:55,307 INFO L85 PathProgramCache]: Analyzing trace with hash -702325813, now seen corresponding path program 1 times [2022-02-10 02:44:55,308 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:44:55,308 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851626750] [2022-02-10 02:44:55,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:44:55,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:44:55,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-10 02:44:55,342 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-10 02:44:55,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-10 02:44:55,356 INFO L138 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-02-10 02:44:55,357 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-10 02:44:55,358 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 2 remaining) [2022-02-10 02:44:55,360 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (0 of 2 remaining) [2022-02-10 02:44:55,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-10 02:44:55,362 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2022-02-10 02:44:55,364 WARN L235 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-02-10 02:44:55,364 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-02-10 02:44:55,369 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-02-10 02:44:55,371 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-10 02:44:55,372 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 [2022-02-10 02:44:55,373 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-02-10 02:44:55,373 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 42 flow [2022-02-10 02:44:55,384 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 75 states, 71 states have (on average 2.084507042253521) internal successors, (148), 74 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:44:55,407 INFO L104 alCausalityReduction]: MaximalCausalityReduction evaluated 215 transitions and produced 121 states. [2022-02-10 02:44:55,409 INFO L276 IsEmpty]: Start isEmpty. Operand has 121 states, 75 states have (on average 1.6) internal successors, (120), 120 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:44:55,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-02-10 02:44:55,410 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:44:55,410 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2022-02-10 02:44:55,410 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION] === [2022-02-10 02:44:55,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:44:55,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1879908, now seen corresponding path program 1 times [2022-02-10 02:44:55,411 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:44:55,412 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660066475] [2022-02-10 02:44:55,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:44:55,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:44:55,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:44:55,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:44:55,430 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:44:55,430 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660066475] [2022-02-10 02:44:55,430 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660066475] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 02:44:55,431 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-10 02:44:55,431 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-10 02:44:55,431 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936692187] [2022-02-10 02:44:55,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 02:44:55,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-10 02:44:55,432 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:44:55,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-10 02:44:55,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-10 02:44:55,434 INFO L87 Difference]: Start difference. First operand has 121 states, 75 states have (on average 1.6) internal successors, (120), 120 states have internal predecessors, (120), 0 states have call successors, (0), 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 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:44:55,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:44:55,451 INFO L93 Difference]: Finished difference Result 119 states and 118 transitions. [2022-02-10 02:44:55,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-10 02:44:55,452 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-02-10 02:44:55,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:44:55,454 INFO L225 Difference]: With dead ends: 119 [2022-02-10 02:44:55,454 INFO L226 Difference]: Without dead ends: 70 [2022-02-10 02:44:55,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-10 02:44:55,456 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 02:44:55,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 16 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 02:44:55,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-02-10 02:44:55,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 42. [2022-02-10 02:44:55,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 35 states have (on average 1.457142857142857) internal successors, (51), 41 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:44:55,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2022-02-10 02:44:55,466 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 4 [2022-02-10 02:44:55,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:44:55,467 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2022-02-10 02:44:55,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:44:55,467 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2022-02-10 02:44:55,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-02-10 02:44:55,468 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:44:55,468 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:44:55,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-10 02:44:55,468 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION] === [2022-02-10 02:44:55,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:44:55,469 INFO L85 PathProgramCache]: Analyzing trace with hash 169138961, now seen corresponding path program 1 times [2022-02-10 02:44:55,469 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:44:55,469 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745812817] [2022-02-10 02:44:55,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:44:55,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:44:55,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:44:55,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:44:55,516 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:44:55,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745812817] [2022-02-10 02:44:55,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745812817] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:44:55,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543699202] [2022-02-10 02:44:55,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:44:55,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:44:55,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:44:55,520 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) [2022-02-10 02:44:55,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-10 02:44:55,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:44:55,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 3 conjunts are in the unsatisfiable core [2022-02-10 02:44:55,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:44:55,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:44:55,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:44:55,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:44:55,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543699202] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:44:55,693 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:44:55,693 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2022-02-10 02:44:55,693 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834612537] [2022-02-10 02:44:55,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:44:55,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-10 02:44:55,694 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:44:55,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-10 02:44:55,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-02-10 02:44:55,695 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:44:55,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:44:55,718 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2022-02-10 02:44:55,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-10 02:44:55,723 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-02-10 02:44:55,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:44:55,724 INFO L225 Difference]: With dead ends: 20 [2022-02-10 02:44:55,724 INFO L226 Difference]: Without dead ends: 20 [2022-02-10 02:44:55,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-02-10 02:44:55,726 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 20 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 02:44:55,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 18 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 02:44:55,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-02-10 02:44:55,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-02-10 02:44:55,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:44:55,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-02-10 02:44:55,731 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 7 [2022-02-10 02:44:55,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:44:55,731 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-02-10 02:44:55,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:44:55,731 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-02-10 02:44:55,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-02-10 02:44:55,732 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:44:55,732 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2022-02-10 02:44:55,754 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-10 02:44:55,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:44:55,933 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION] === [2022-02-10 02:44:55,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:44:55,934 INFO L85 PathProgramCache]: Analyzing trace with hash 821553292, now seen corresponding path program 1 times [2022-02-10 02:44:55,934 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:44:55,934 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560693799] [2022-02-10 02:44:55,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:44:55,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:44:55,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-10 02:44:55,944 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-10 02:44:55,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-10 02:44:55,951 INFO L138 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-02-10 02:44:55,952 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-10 02:44:55,952 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 2 remaining) [2022-02-10 02:44:55,952 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (0 of 2 remaining) [2022-02-10 02:44:55,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-10 02:44:55,953 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-02-10 02:44:55,953 WARN L235 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-02-10 02:44:55,953 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-02-10 02:44:55,959 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-02-10 02:44:55,962 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-10 02:44:55,963 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 [2022-02-10 02:44:55,963 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-02-10 02:44:55,964 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 25 places, 18 transitions, 57 flow [2022-02-10 02:44:56,020 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 228 states, 223 states have (on average 2.6681614349775784) internal successors, (595), 227 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:44:56,101 INFO L104 alCausalityReduction]: MaximalCausalityReduction evaluated 1749 transitions and produced 780 states. [2022-02-10 02:44:56,107 INFO L276 IsEmpty]: Start isEmpty. Operand has 780 states, 452 states have (on average 1.7234513274336283) internal successors, (779), 779 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:44:56,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-02-10 02:44:56,108 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:44:56,108 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2022-02-10 02:44:56,109 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION] === [2022-02-10 02:44:56,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:44:56,110 INFO L85 PathProgramCache]: Analyzing trace with hash 2434020, now seen corresponding path program 1 times [2022-02-10 02:44:56,110 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:44:56,110 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202280348] [2022-02-10 02:44:56,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:44:56,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:44:56,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:44:56,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:44:56,127 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:44:56,130 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202280348] [2022-02-10 02:44:56,130 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202280348] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 02:44:56,130 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-10 02:44:56,130 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-10 02:44:56,130 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728000497] [2022-02-10 02:44:56,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 02:44:56,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-10 02:44:56,131 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:44:56,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-10 02:44:56,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-10 02:44:56,135 INFO L87 Difference]: Start difference. First operand has 780 states, 452 states have (on average 1.7234513274336283) internal successors, (779), 779 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:44:56,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:44:56,173 INFO L93 Difference]: Finished difference Result 778 states and 777 transitions. [2022-02-10 02:44:56,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-10 02:44:56,180 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-02-10 02:44:56,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:44:56,186 INFO L225 Difference]: With dead ends: 778 [2022-02-10 02:44:56,186 INFO L226 Difference]: Without dead ends: 452 [2022-02-10 02:44:56,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-10 02:44:56,188 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 4 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 02:44:56,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 20 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 02:44:56,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-02-10 02:44:56,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 135. [2022-02-10 02:44:56,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 113 states have (on average 1.831858407079646) internal successors, (207), 134 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:44:56,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 207 transitions. [2022-02-10 02:44:56,214 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 207 transitions. Word has length 4 [2022-02-10 02:44:56,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:44:56,215 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 207 transitions. [2022-02-10 02:44:56,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:44:56,215 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 207 transitions. [2022-02-10 02:44:56,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-02-10 02:44:56,215 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:44:56,216 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:44:56,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-10 02:44:56,216 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION] === [2022-02-10 02:44:56,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:44:56,217 INFO L85 PathProgramCache]: Analyzing trace with hash -503102175, now seen corresponding path program 1 times [2022-02-10 02:44:56,217 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:44:56,217 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721574522] [2022-02-10 02:44:56,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:44:56,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:44:56,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:44:56,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:44:56,254 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:44:56,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721574522] [2022-02-10 02:44:56,255 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721574522] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:44:56,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37043235] [2022-02-10 02:44:56,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:44:56,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:44:56,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:44:56,259 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) [2022-02-10 02:44:56,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-10 02:44:56,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:44:56,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 3 conjunts are in the unsatisfiable core [2022-02-10 02:44:56,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:44:56,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:44:56,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:44:56,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:44:56,368 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37043235] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:44:56,368 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:44:56,369 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2022-02-10 02:44:56,369 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677380508] [2022-02-10 02:44:56,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:44:56,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-10 02:44:56,369 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:44:56,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-10 02:44:56,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-02-10 02:44:56,370 INFO L87 Difference]: Start difference. First operand 135 states and 207 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:44:56,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:44:56,397 INFO L93 Difference]: Finished difference Result 49 states and 67 transitions. [2022-02-10 02:44:56,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-10 02:44:56,399 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-02-10 02:44:56,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:44:56,401 INFO L225 Difference]: With dead ends: 49 [2022-02-10 02:44:56,401 INFO L226 Difference]: Without dead ends: 49 [2022-02-10 02:44:56,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-02-10 02:44:56,402 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 02:44:56,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 24 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 02:44:56,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-02-10 02:44:56,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-02-10 02:44:56,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 40 states have (on average 1.675) internal successors, (67), 48 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:44:56,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 67 transitions. [2022-02-10 02:44:56,407 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 67 transitions. Word has length 7 [2022-02-10 02:44:56,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:44:56,407 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 67 transitions. [2022-02-10 02:44:56,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:44:56,407 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 67 transitions. [2022-02-10 02:44:56,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-10 02:44:56,408 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:44:56,408 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1] [2022-02-10 02:44:56,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-10 02:44:56,635 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,SelfDestructingSolverStorable6 [2022-02-10 02:44:56,636 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION] === [2022-02-10 02:44:56,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:44:56,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1531306539, now seen corresponding path program 1 times [2022-02-10 02:44:56,637 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:44:56,637 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82863679] [2022-02-10 02:44:56,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:44:56,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:44:56,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-10 02:44:56,647 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-10 02:44:56,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-10 02:44:56,656 INFO L138 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-02-10 02:44:56,657 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-10 02:44:56,657 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 2 remaining) [2022-02-10 02:44:56,657 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (0 of 2 remaining) [2022-02-10 02:44:56,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-10 02:44:56,658 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-02-10 02:44:56,658 WARN L235 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-02-10 02:44:56,658 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-02-10 02:44:56,664 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-02-10 02:44:56,666 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-10 02:44:56,666 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 [2022-02-10 02:44:56,666 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-02-10 02:44:56,667 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 30 places, 21 transitions, 74 flow [2022-02-10 02:44:56,714 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 687 states, 681 states have (on average 3.292217327459618) internal successors, (2242), 686 states have internal predecessors, (2242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:44:56,983 INFO L104 alCausalityReduction]: MaximalCausalityReduction evaluated 18148 transitions and produced 6715 states. [2022-02-10 02:44:57,012 INFO L276 IsEmpty]: Start isEmpty. Operand has 6715 states, 3749 states have (on average 1.7908775673512938) internal successors, (6714), 6714 states have internal predecessors, (6714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:44:57,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-02-10 02:44:57,012 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:44:57,012 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2022-02-10 02:44:57,013 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION] === [2022-02-10 02:44:57,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:44:57,014 INFO L85 PathProgramCache]: Analyzing trace with hash 3080484, now seen corresponding path program 1 times [2022-02-10 02:44:57,014 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:44:57,014 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411346615] [2022-02-10 02:44:57,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:44:57,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:44:57,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:44:57,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:44:57,037 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:44:57,037 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411346615] [2022-02-10 02:44:57,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411346615] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 02:44:57,037 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-10 02:44:57,037 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-10 02:44:57,037 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534341700] [2022-02-10 02:44:57,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 02:44:57,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-10 02:44:57,038 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:44:57,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-10 02:44:57,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-10 02:44:57,100 INFO L87 Difference]: Start difference. First operand has 6715 states, 3749 states have (on average 1.7908775673512938) internal successors, (6714), 6714 states have internal predecessors, (6714), 0 states have call successors, (0), 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 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:44:57,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:44:57,214 INFO L93 Difference]: Finished difference Result 6713 states and 6712 transitions. [2022-02-10 02:44:57,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-10 02:44:57,215 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-02-10 02:44:57,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:44:57,242 INFO L225 Difference]: With dead ends: 6713 [2022-02-10 02:44:57,243 INFO L226 Difference]: Without dead ends: 4111 [2022-02-10 02:44:57,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-10 02:44:57,248 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 4 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 02:44:57,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 24 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 02:44:57,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4111 states. [2022-02-10 02:44:57,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4111 to 487. [2022-02-10 02:44:57,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 420 states have (on average 2.2333333333333334) internal successors, (938), 486 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:44:57,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 938 transitions. [2022-02-10 02:44:57,334 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 938 transitions. Word has length 4 [2022-02-10 02:44:57,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:44:57,334 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 938 transitions. [2022-02-10 02:44:57,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:44:57,335 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 938 transitions. [2022-02-10 02:44:57,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-02-10 02:44:57,335 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:44:57,335 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:44:57,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-10 02:44:57,335 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION] === [2022-02-10 02:44:57,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:44:57,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1575918100, now seen corresponding path program 1 times [2022-02-10 02:44:57,336 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:44:57,336 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970780336] [2022-02-10 02:44:57,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:44:57,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:44:57,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:44:57,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:44:57,377 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:44:57,377 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970780336] [2022-02-10 02:44:57,377 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970780336] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:44:57,377 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884832629] [2022-02-10 02:44:57,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:44:57,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:44:57,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:44:57,379 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) [2022-02-10 02:44:57,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-10 02:44:57,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:44:57,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 3 conjunts are in the unsatisfiable core [2022-02-10 02:44:57,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:44:57,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:44:57,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:44:57,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:44:57,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884832629] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:44:57,441 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:44:57,441 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2022-02-10 02:44:57,441 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459742224] [2022-02-10 02:44:57,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:44:57,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-10 02:44:57,441 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:44:57,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-10 02:44:57,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-02-10 02:44:57,442 INFO L87 Difference]: Start difference. First operand 487 states and 938 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:44:57,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:44:57,469 INFO L93 Difference]: Finished difference Result 401 states and 798 transitions. [2022-02-10 02:44:57,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-10 02:44:57,469 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-02-10 02:44:57,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:44:57,472 INFO L225 Difference]: With dead ends: 401 [2022-02-10 02:44:57,472 INFO L226 Difference]: Without dead ends: 401 [2022-02-10 02:44:57,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-02-10 02:44:57,473 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 17 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 02:44:57,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 66 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 02:44:57,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-02-10 02:44:57,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 401. [2022-02-10 02:44:57,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 347 states have (on average 2.2997118155619596) internal successors, (798), 400 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:44:57,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 798 transitions. [2022-02-10 02:44:57,485 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 798 transitions. Word has length 7 [2022-02-10 02:44:57,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:44:57,485 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 798 transitions. [2022-02-10 02:44:57,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:44:57,485 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 798 transitions. [2022-02-10 02:44:57,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-10 02:44:57,486 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:44:57,486 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:44:57,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-10 02:44:57,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:44:57,708 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION] === [2022-02-10 02:44:57,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:44:57,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1105790513, now seen corresponding path program 1 times [2022-02-10 02:44:57,709 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:44:57,709 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030360822] [2022-02-10 02:44:57,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:44:57,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:44:57,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-10 02:44:57,718 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-10 02:44:57,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-10 02:44:57,726 INFO L138 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-02-10 02:44:57,726 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-10 02:44:57,726 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 2 remaining) [2022-02-10 02:44:57,726 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (0 of 2 remaining) [2022-02-10 02:44:57,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-10 02:44:57,734 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-02-10 02:44:57,734 WARN L235 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-02-10 02:44:57,734 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-02-10 02:44:57,744 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-02-10 02:44:57,745 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-10 02:44:57,745 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 [2022-02-10 02:44:57,745 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-02-10 02:44:57,746 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 35 places, 24 transitions, 93 flow [2022-02-10 02:44:57,837 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2064 states, 2057 states have (on average 3.9382596013612057) internal successors, (8101), 2063 states have internal predecessors, (8101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:44:59,926 INFO L104 alCausalityReduction]: MaximalCausalityReduction evaluated 229604 transitions and produced 72558 states. [2022-02-10 02:45:00,273 INFO L276 IsEmpty]: Start isEmpty. Operand has 72558 states, 39638 states have (on average 1.8304909430344618) internal successors, (72557), 72557 states have internal predecessors, (72557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:45:00,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-02-10 02:45:00,274 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:45:00,274 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2022-02-10 02:45:00,275 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION] === [2022-02-10 02:45:00,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:45:00,275 INFO L85 PathProgramCache]: Analyzing trace with hash 3819300, now seen corresponding path program 1 times [2022-02-10 02:45:00,275 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:45:00,275 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826057175] [2022-02-10 02:45:00,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:45:00,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:45:00,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:45:00,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:45:00,305 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:45:00,305 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826057175] [2022-02-10 02:45:00,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826057175] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 02:45:00,306 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-10 02:45:00,306 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-10 02:45:00,306 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507913405] [2022-02-10 02:45:00,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 02:45:00,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-10 02:45:00,306 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:45:00,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-10 02:45:00,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-10 02:45:00,618 INFO L87 Difference]: Start difference. First operand has 72558 states, 39638 states have (on average 1.8304909430344618) internal successors, (72557), 72557 states have internal predecessors, (72557), 0 states have call successors, (0), 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 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:45:01,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:45:01,799 INFO L93 Difference]: Finished difference Result 72556 states and 72555 transitions. [2022-02-10 02:45:01,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-10 02:45:01,799 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-02-10 02:45:01,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:45:02,144 INFO L225 Difference]: With dead ends: 72556 [2022-02-10 02:45:02,144 INFO L226 Difference]: Without dead ends: 46911 [2022-02-10 02:45:02,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-10 02:45:02,145 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 4 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 02:45:02,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 28 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 02:45:02,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46911 states. [2022-02-10 02:45:02,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46911 to 1863. [2022-02-10 02:45:02,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1863 states, 1661 states have (on average 2.638771824202288) internal successors, (4383), 1862 states have internal predecessors, (4383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:45:02,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 4383 transitions. [2022-02-10 02:45:02,736 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 4383 transitions. Word has length 4 [2022-02-10 02:45:02,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:45:02,737 INFO L470 AbstractCegarLoop]: Abstraction has 1863 states and 4383 transitions. [2022-02-10 02:45:02,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:45:02,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 4383 transitions. [2022-02-10 02:45:02,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-02-10 02:45:02,738 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:45:02,738 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:45:02,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-10 02:45:02,738 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION] === [2022-02-10 02:45:02,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:45:02,739 INFO L85 PathProgramCache]: Analyzing trace with hash 2111232490, now seen corresponding path program 1 times [2022-02-10 02:45:02,739 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:45:02,739 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708795823] [2022-02-10 02:45:02,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:45:02,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:45:02,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:45:02,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:45:02,777 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:45:02,777 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708795823] [2022-02-10 02:45:02,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708795823] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:45:02,777 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137059653] [2022-02-10 02:45:02,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:45:02,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:45:02,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:45:02,779 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) [2022-02-10 02:45:02,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-10 02:45:02,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:45:02,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 3 conjunts are in the unsatisfiable core [2022-02-10 02:45:02,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:45:02,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:45:02,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:45:02,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:45:02,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137059653] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:45:02,857 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:45:02,857 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2022-02-10 02:45:02,859 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238866795] [2022-02-10 02:45:02,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:45:02,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-10 02:45:02,860 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:45:02,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-10 02:45:02,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-02-10 02:45:02,861 INFO L87 Difference]: Start difference. First operand 1863 states and 4383 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:45:02,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:45:02,899 INFO L93 Difference]: Finished difference Result 1777 states and 4243 transitions. [2022-02-10 02:45:02,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-10 02:45:02,900 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-02-10 02:45:02,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:45:02,918 INFO L225 Difference]: With dead ends: 1777 [2022-02-10 02:45:02,918 INFO L226 Difference]: Without dead ends: 1777 [2022-02-10 02:45:02,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-02-10 02:45:02,920 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 21 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 02:45:02,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 71 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 02:45:02,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1777 states. [2022-02-10 02:45:02,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1777 to 1777. [2022-02-10 02:45:02,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1777 states, 1588 states have (on average 2.6719143576826196) internal successors, (4243), 1776 states have internal predecessors, (4243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:45:02,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1777 states to 1777 states and 4243 transitions. [2022-02-10 02:45:02,955 INFO L78 Accepts]: Start accepts. Automaton has 1777 states and 4243 transitions. Word has length 7 [2022-02-10 02:45:02,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:45:02,956 INFO L470 AbstractCegarLoop]: Abstraction has 1777 states and 4243 transitions. [2022-02-10 02:45:02,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:45:02,956 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states and 4243 transitions. [2022-02-10 02:45:02,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-10 02:45:02,957 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:45:02,957 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:45:02,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-10 02:45:03,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:45:03,182 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION] === [2022-02-10 02:45:03,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:45:03,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1631084642, now seen corresponding path program 1 times [2022-02-10 02:45:03,182 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:45:03,182 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502359988] [2022-02-10 02:45:03,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:45:03,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:45:03,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:45:03,229 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:45:03,230 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:45:03,230 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502359988] [2022-02-10 02:45:03,230 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502359988] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:45:03,230 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999383924] [2022-02-10 02:45:03,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:45:03,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:45:03,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:45:03,232 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) [2022-02-10 02:45:03,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-10 02:45:03,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:45:03,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-10 02:45:03,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:45:03,315 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:45:03,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:45:03,372 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:45:03,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999383924] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:45:03,372 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:45:03,372 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2022-02-10 02:45:03,372 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910605040] [2022-02-10 02:45:03,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:45:03,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-10 02:45:03,373 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:45:03,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-10 02:45:03,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-02-10 02:45:03,374 INFO L87 Difference]: Start difference. First operand 1777 states and 4243 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:45:03,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:45:03,401 INFO L93 Difference]: Finished difference Result 1527 states and 3721 transitions. [2022-02-10 02:45:03,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-10 02:45:03,401 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-10 02:45:03,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:45:03,407 INFO L225 Difference]: With dead ends: 1527 [2022-02-10 02:45:03,407 INFO L226 Difference]: Without dead ends: 1527 [2022-02-10 02:45:03,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-02-10 02:45:03,408 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 22 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 02:45:03,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 80 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 02:45:03,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1527 states. [2022-02-10 02:45:03,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1527 to 1527. [2022-02-10 02:45:03,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1365 states have (on average 2.726007326007326) internal successors, (3721), 1526 states have internal predecessors, (3721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:45:03,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 3721 transitions. [2022-02-10 02:45:03,487 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 3721 transitions. Word has length 16 [2022-02-10 02:45:03,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:45:03,495 INFO L470 AbstractCegarLoop]: Abstraction has 1527 states and 3721 transitions. [2022-02-10 02:45:03,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:45:03,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 3721 transitions. [2022-02-10 02:45:03,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-10 02:45:03,495 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:45:03,496 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:45:03,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-10 02:45:03,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-02-10 02:45:03,716 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION] === [2022-02-10 02:45:03,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:45:03,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1617682089, now seen corresponding path program 1 times [2022-02-10 02:45:03,716 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:45:03,716 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81269265] [2022-02-10 02:45:03,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:45:03,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:45:03,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:45:03,776 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:45:03,776 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:45:03,777 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81269265] [2022-02-10 02:45:03,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81269265] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 02:45:03,777 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-10 02:45:03,777 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-10 02:45:03,777 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418774356] [2022-02-10 02:45:03,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 02:45:03,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-10 02:45:03,778 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:45:03,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-10 02:45:03,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-02-10 02:45:03,778 INFO L87 Difference]: Start difference. First operand 1527 states and 3721 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) [2022-02-10 02:45:03,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:45:03,806 INFO L93 Difference]: Finished difference Result 1009 states and 2487 transitions. [2022-02-10 02:45:03,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-10 02:45:03,807 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 19 [2022-02-10 02:45:03,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:45:03,810 INFO L225 Difference]: With dead ends: 1009 [2022-02-10 02:45:03,810 INFO L226 Difference]: Without dead ends: 1009 [2022-02-10 02:45:03,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-02-10 02:45:03,811 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 44 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 02:45:03,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 14 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 02:45:03,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2022-02-10 02:45:03,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 1009. [2022-02-10 02:45:03,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 928 states have (on average 2.679956896551724) internal successors, (2487), 1008 states have internal predecessors, (2487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:45:03,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 2487 transitions. [2022-02-10 02:45:03,832 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 2487 transitions. Word has length 19 [2022-02-10 02:45:03,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:45:03,833 INFO L470 AbstractCegarLoop]: Abstraction has 1009 states and 2487 transitions. [2022-02-10 02:45:03,833 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) [2022-02-10 02:45:03,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 2487 transitions. [2022-02-10 02:45:03,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-10 02:45:03,833 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:45:03,834 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:45:03,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-10 02:45:03,834 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION] === [2022-02-10 02:45:03,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:45:03,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1617682072, now seen corresponding path program 1 times [2022-02-10 02:45:03,834 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:45:03,834 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669018560] [2022-02-10 02:45:03,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:45:03,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:45:03,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-10 02:45:03,842 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-10 02:45:03,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-10 02:45:03,849 INFO L138 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-02-10 02:45:03,849 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-10 02:45:03,849 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (1 of 2 remaining) [2022-02-10 02:45:03,850 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION (0 of 2 remaining) [2022-02-10 02:45:03,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-10 02:45:03,850 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-02-10 02:45:03,854 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 5 thread instances [2022-02-10 02:45:03,854 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-10 02:45:03,868 INFO L202 PluginConnector]: Adding new model bigNumberOfThreads.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.02 02:45:03 BasicIcfg [2022-02-10 02:45:03,868 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-10 02:45:03,869 INFO L158 Benchmark]: Toolchain (without parser) took 9284.87ms. Allocated memory was 196.1MB in the beginning and 1.7GB in the end (delta: 1.5GB). Free memory was 155.5MB in the beginning and 1.5GB in the end (delta: -1.3GB). Peak memory consumption was 250.8MB. Max. memory is 8.0GB. [2022-02-10 02:45:03,869 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.14ms. Allocated memory is still 196.1MB. Free memory is still 156.4MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-10 02:45:03,869 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.31ms. Allocated memory is still 196.1MB. Free memory was 155.3MB in the beginning and 153.8MB in the end (delta: 1.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-02-10 02:45:03,869 INFO L158 Benchmark]: Boogie Preprocessor took 12.56ms. Allocated memory is still 196.1MB. Free memory was 153.8MB in the beginning and 152.9MB in the end (delta: 912.1kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-10 02:45:03,869 INFO L158 Benchmark]: RCFGBuilder took 236.89ms. Allocated memory is still 196.1MB. Free memory was 152.9MB in the beginning and 144.9MB in the end (delta: 7.9MB). Peak memory consumption was 7.3MB. Max. memory is 8.0GB. [2022-02-10 02:45:03,870 INFO L158 Benchmark]: TraceAbstraction took 9002.01ms. Allocated memory was 196.1MB in the beginning and 1.7GB in the end (delta: 1.5GB). Free memory was 144.5MB in the beginning and 1.5GB in the end (delta: -1.3GB). Peak memory consumption was 238.2MB. Max. memory is 8.0GB. [2022-02-10 02:45:03,871 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 0.14ms. Allocated memory is still 196.1MB. Free memory is still 156.4MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 27.31ms. Allocated memory is still 196.1MB. Free memory was 155.3MB in the beginning and 153.8MB in the end (delta: 1.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 12.56ms. Allocated memory is still 196.1MB. Free memory was 153.8MB in the beginning and 152.9MB in the end (delta: 912.1kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 236.89ms. Allocated memory is still 196.1MB. Free memory was 152.9MB in the beginning and 144.9MB in the end (delta: 7.9MB). Peak memory consumption was 7.3MB. Max. memory is 8.0GB. * TraceAbstraction took 9002.01ms. Allocated memory was 196.1MB in the beginning and 1.7GB in the end (delta: 1.5GB). Free memory was 144.5MB in the beginning and 1.5GB in the end (delta: -1.3GB). Peak memory consumption was 238.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 0 - 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 - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 0 - 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 - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 0 - 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 - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 0 - 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 - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 0 - 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 - CounterExampleResult [Line: 33]: assertion can be violated assertion can be violated We found a FailurePath: [L26] 0 x := 0; VAL [x=0] [L27] 0 i := 0; VAL [i=0, x=0] [L29] COND TRUE 0 i < 5 VAL [i=0, x=0] [L30] FORK 0 fork i thread(); VAL [i=0, x=0] [L31] 0 i := i + 1; VAL [i=1, x=0] [L29] COND TRUE 0 i < 5 VAL [i=1, x=0] [L30] FORK 0 fork i thread(); VAL [i=1, x=0] [L31] 0 i := i + 1; VAL [i=2, x=0] [L29] COND TRUE 0 i < 5 VAL [i=2, x=0] [L30] FORK 0 fork i thread(); VAL [i=2, x=0] [L31] 0 i := i + 1; VAL [i=3, x=0] [L29] COND TRUE 0 i < 5 VAL [i=3, x=0] [L30] FORK 0 fork i thread(); VAL [i=3, x=0] [L31] 0 i := i + 1; VAL [i=4, x=0] [L29] COND TRUE 0 i < 5 VAL [i=4, x=0] [L30] FORK 0 fork i thread(); VAL [i=4, x=0] [L31] 0 i := i + 1; VAL [i=5, x=0] [L29] COND FALSE 0 !(i < 5) VAL [i=5, x=0] [L33] 0 assert x > 0; VAL [i=5, x=0] - UnprovableResult [Line: 30]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 16 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4 mSDsluCounter, 12 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6 IncrementalHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 7 mSDtfsCounter, 6 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 3 ConstructedInterpolants, 0 QuantifiedInterpolants, 5 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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 - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 4 procedures, 19 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.6s, OverallIterations: 3, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 24 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 24 mSDsluCounter, 34 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 18 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 17 IncrementalHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 16 mSDtfsCounter, 17 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=121occurred in iteration=0, InterpolantAutomatonStates: 8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 28 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 47 SizeOfPredicates, 0 NumberOfNonLiveVariables, 13 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 0/3 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 - StatisticsResult: Ultimate Automizer benchmark data with 3 thread instances CFG has 5 procedures, 22 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.7s, OverallIterations: 3, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 23 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 23 mSDsluCounter, 44 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 24 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 23 IncrementalHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 20 mSDtfsCounter, 23 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=780occurred in iteration=0, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 317 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 31 NumberOfCodeBlocks, 31 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 47 SizeOfPredicates, 0 NumberOfNonLiveVariables, 13 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 0/3 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 - StatisticsResult: Ultimate Automizer benchmark data with 4 thread instances CFG has 6 procedures, 25 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 1.1s, OverallIterations: 3, TraceHistogramMax: 5, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.3s, PartialOrderReductionTime: 0.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 21 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 21 mSDsluCounter, 90 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 57 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 32 IncrementalHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 33 mSDtfsCounter, 32 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6715occurred in iteration=0, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 2 MinimizatonAttempts, 3624 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 34 NumberOfCodeBlocks, 34 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 47 SizeOfPredicates, 0 NumberOfNonLiveVariables, 13 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 0/3 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 - StatisticsResult: Ultimate Automizer benchmark data with 5 thread instances CFG has 7 procedures, 28 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 6.1s, OverallIterations: 5, TraceHistogramMax: 6, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.3s, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.2s, PartialOrderReductionTime: 2.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 91 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 91 mSDsluCounter, 193 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 116 mSDsCounter, 8 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 101 IncrementalHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 8 mSolverCounterUnsat, 77 mSDtfsCounter, 101 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 64 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=72558occurred in iteration=0, InterpolantAutomatonStates: 24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 4 MinimizatonAttempts, 45048 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 88 NumberOfCodeBlocks, 88 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 84 ConstructedInterpolants, 0 QuantifiedInterpolants, 220 SizeOfPredicates, 0 NumberOfNonLiveVariables, 41 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 40/109 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-02-10 02:45:03,914 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...