/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy7.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-44898dd [2022-02-15 14:48:38,384 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 14:48:38,385 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 14:48:38,425 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 14:48:38,480 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-02-15 14:48:38,502 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 14:48:38,502 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 14:48:38,502 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-15 14:48:38,502 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-15 14:48:38,503 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-15 14:48:38,503 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-15 14:48:38,503 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-15 14:48:38,503 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-15 14:48:38,503 INFO L138 SettingsManager]: * Use SBE=true [2022-02-15 14:48:38,504 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 14:48:38,504 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-15 14:48:38,504 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 14:48:38,504 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-15 14:48:38,504 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 14:48:38,504 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 14:48:38,504 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 14:48:38,504 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 14:48:38,504 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-15 14:48:38,504 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 14:48:38,504 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 14:48:38,504 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 14:48:38,505 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 14:48:38,505 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 14:48:38,505 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 14:48:38,505 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 14:48:38,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 14:48:38,505 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 14:48:38,505 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-15 14:48:38,505 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-15 14:48:38,505 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-15 14:48:38,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-15 14:48:38,505 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-15 14:48:38,505 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 14:48:38,506 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-15 14:48:38,687 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 14:48:38,708 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 14:48:38,710 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 14:48:38,711 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-15 14:48:38,712 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-15 14:48:38,713 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy7.wvr.bpl [2022-02-15 14:48:38,713 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy7.wvr.bpl' [2022-02-15 14:48:38,726 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 14:48:38,727 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 14:48:38,728 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-15 14:48:38,728 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-15 14:48:38,728 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-15 14:48:38,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "easy7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:48:38" (1/1) ... [2022-02-15 14:48:38,741 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "easy7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:48:38" (1/1) ... [2022-02-15 14:48:38,746 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-15 14:48:38,747 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-15 14:48:38,748 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 14:48:38,748 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 14:48:38,748 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 14:48:38,753 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "easy7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:48:38" (1/1) ... [2022-02-15 14:48:38,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "easy7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:48:38" (1/1) ... [2022-02-15 14:48:38,754 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "easy7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:48:38" (1/1) ... [2022-02-15 14:48:38,754 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "easy7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:48:38" (1/1) ... [2022-02-15 14:48:38,755 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "easy7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:48:38" (1/1) ... [2022-02-15 14:48:38,755 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "easy7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:48:38" (1/1) ... [2022-02-15 14:48:38,756 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "easy7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:48:38" (1/1) ... [2022-02-15 14:48:38,756 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 14:48:38,757 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 14:48:38,757 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 14:48:38,757 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 14:48:38,758 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "easy7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:48:38" (1/1) ... [2022-02-15 14:48:38,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 14:48:38,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 14:48:38,780 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) [2022-02-15 14:48:38,788 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 [2022-02-15 14:48:38,810 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-15 14:48:38,810 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-15 14:48:38,810 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-15 14:48:38,810 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-15 14:48:38,810 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-15 14:48:38,811 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-15 14:48:38,811 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-15 14:48:38,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 14:48:38,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 14:48:38,811 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-15 14:48:38,839 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 14:48:38,841 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 14:48:38,938 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 14:48:38,945 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 14:48:38,945 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-15 14:48:38,947 INFO L202 PluginConnector]: Adding new model easy7.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:48:38 BoogieIcfgContainer [2022-02-15 14:48:38,947 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 14:48:38,948 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 14:48:38,949 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 14:48:38,951 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 14:48:38,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "easy7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 02:48:38" (1/2) ... [2022-02-15 14:48:38,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cddcc95 and model type easy7.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 02:48:38, skipping insertion in model container [2022-02-15 14:48:38,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "easy7.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:48:38" (2/2) ... [2022-02-15 14:48:38,954 INFO L111 eAbstractionObserver]: Analyzing ICFG easy7.wvr.bpl [2022-02-15 14:48:38,961 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-15 14:48:38,961 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-15 14:48:38,961 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 14:48:38,961 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-15 14:48:39,000 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-02-15 14:48:39,045 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 14:48:39,052 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 [2022-02-15 14:48:39,052 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-02-15 14:48:39,064 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 21 transitions, 58 flow [2022-02-15 14:48:39,085 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 53 states, 52 states have (on average 1.6730769230769231) internal successors, (87), 52 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:39,087 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 52 states have (on average 1.6730769230769231) internal successors, (87), 52 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:39,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 14:48:39,093 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:39,094 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:48:39,094 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:48:39,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:39,099 INFO L85 PathProgramCache]: Analyzing trace with hash -908875181, now seen corresponding path program 1 times [2022-02-15 14:48:39,105 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:39,106 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308180291] [2022-02-15 14:48:39,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:39,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:39,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:39,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:39,413 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:39,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308180291] [2022-02-15 14:48:39,414 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308180291] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 14:48:39,414 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 14:48:39,414 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 14:48:39,415 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099940499] [2022-02-15 14:48:39,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 14:48:39,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 14:48:39,420 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:39,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 14:48:39,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-15 14:48:39,455 INFO L87 Difference]: Start difference. First operand has 53 states, 52 states have (on average 1.6730769230769231) internal successors, (87), 52 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:39,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:39,648 INFO L93 Difference]: Finished difference Result 75 states and 122 transitions. [2022-02-15 14:48:39,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 14:48:39,650 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-15 14:48:39,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:39,655 INFO L225 Difference]: With dead ends: 75 [2022-02-15 14:48:39,655 INFO L226 Difference]: Without dead ends: 54 [2022-02-15 14:48:39,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-15 14:48:39,663 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 14:48:39,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 47 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 14:48:39,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-02-15 14:48:39,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-02-15 14:48:39,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.6226415094339623) internal successors, (86), 53 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:39,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 86 transitions. [2022-02-15 14:48:39,720 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 86 transitions. Word has length 17 [2022-02-15 14:48:39,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:39,720 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 86 transitions. [2022-02-15 14:48:39,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:39,721 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 86 transitions. [2022-02-15 14:48:39,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 14:48:39,721 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:39,721 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:48:39,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 14:48:39,722 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:48:39,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:39,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1652015375, now seen corresponding path program 2 times [2022-02-15 14:48:39,722 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:39,723 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433585237] [2022-02-15 14:48:39,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:39,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:39,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:39,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:39,855 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:39,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433585237] [2022-02-15 14:48:39,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433585237] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 14:48:39,855 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 14:48:39,855 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 14:48:39,855 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859257584] [2022-02-15 14:48:39,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 14:48:39,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 14:48:39,857 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:39,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 14:48:39,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-15 14:48:39,857 INFO L87 Difference]: Start difference. First operand 54 states and 86 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:39,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:39,986 INFO L93 Difference]: Finished difference Result 74 states and 117 transitions. [2022-02-15 14:48:39,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 14:48:39,987 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-15 14:48:39,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:39,989 INFO L225 Difference]: With dead ends: 74 [2022-02-15 14:48:39,990 INFO L226 Difference]: Without dead ends: 48 [2022-02-15 14:48:39,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-15 14:48:39,994 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 14:48:39,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 46 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 14:48:39,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-02-15 14:48:40,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2022-02-15 14:48:40,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 44 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:40,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 69 transitions. [2022-02-15 14:48:40,009 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 69 transitions. Word has length 17 [2022-02-15 14:48:40,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:40,010 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 69 transitions. [2022-02-15 14:48:40,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:40,010 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 69 transitions. [2022-02-15 14:48:40,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 14:48:40,011 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:40,012 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:48:40,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 14:48:40,012 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:48:40,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:40,013 INFO L85 PathProgramCache]: Analyzing trace with hash 666384083, now seen corresponding path program 3 times [2022-02-15 14:48:40,013 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:40,013 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504155180] [2022-02-15 14:48:40,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:40,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:40,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:40,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:40,121 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:40,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504155180] [2022-02-15 14:48:40,121 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504155180] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 14:48:40,121 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 14:48:40,121 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 14:48:40,121 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655829263] [2022-02-15 14:48:40,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 14:48:40,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 14:48:40,122 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:40,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 14:48:40,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-15 14:48:40,122 INFO L87 Difference]: Start difference. First operand 45 states and 69 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:40,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:40,213 INFO L93 Difference]: Finished difference Result 62 states and 94 transitions. [2022-02-15 14:48:40,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 14:48:40,214 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-15 14:48:40,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:40,215 INFO L225 Difference]: With dead ends: 62 [2022-02-15 14:48:40,215 INFO L226 Difference]: Without dead ends: 36 [2022-02-15 14:48:40,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-15 14:48:40,216 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 8 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 14:48:40,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 45 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 14:48:40,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-02-15 14:48:40,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-02-15 14:48:40,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 34 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:40,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 50 transitions. [2022-02-15 14:48:40,220 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 50 transitions. Word has length 17 [2022-02-15 14:48:40,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:40,220 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 50 transitions. [2022-02-15 14:48:40,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:40,220 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 50 transitions. [2022-02-15 14:48:40,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 14:48:40,221 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:40,221 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:48:40,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 14:48:40,222 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:48:40,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:40,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1690636559, now seen corresponding path program 4 times [2022-02-15 14:48:40,223 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:40,223 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684594611] [2022-02-15 14:48:40,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:40,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:40,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:40,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:40,339 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:40,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684594611] [2022-02-15 14:48:40,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684594611] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 14:48:40,339 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 14:48:40,339 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 14:48:40,339 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186202544] [2022-02-15 14:48:40,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 14:48:40,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 14:48:40,340 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:40,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 14:48:40,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-15 14:48:40,340 INFO L87 Difference]: Start difference. First operand 35 states and 50 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:40,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:40,417 INFO L93 Difference]: Finished difference Result 48 states and 67 transitions. [2022-02-15 14:48:40,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 14:48:40,417 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-15 14:48:40,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:40,417 INFO L225 Difference]: With dead ends: 48 [2022-02-15 14:48:40,417 INFO L226 Difference]: Without dead ends: 24 [2022-02-15 14:48:40,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-15 14:48:40,418 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 14:48:40,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 44 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 14:48:40,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-02-15 14:48:40,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-02-15 14:48:40,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:40,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2022-02-15 14:48:40,421 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 17 [2022-02-15 14:48:40,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:40,421 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2022-02-15 14:48:40,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:40,421 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2022-02-15 14:48:40,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 14:48:40,422 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 14:48:40,422 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 14:48:40,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 14:48:40,422 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-15 14:48:40,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 14:48:40,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1226320173, now seen corresponding path program 5 times [2022-02-15 14:48:40,423 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 14:48:40,423 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328999630] [2022-02-15 14:48:40,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 14:48:40,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 14:48:40,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 14:48:40,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 14:48:40,502 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 14:48:40,502 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328999630] [2022-02-15 14:48:40,502 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328999630] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 14:48:40,502 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 14:48:40,503 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 14:48:40,503 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718788319] [2022-02-15 14:48:40,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 14:48:40,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 14:48:40,503 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 14:48:40,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 14:48:40,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-15 14:48:40,504 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:40,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 14:48:40,526 INFO L93 Difference]: Finished difference Result 22 states and 27 transitions. [2022-02-15 14:48:40,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 14:48:40,527 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-15 14:48:40,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 14:48:40,527 INFO L225 Difference]: With dead ends: 22 [2022-02-15 14:48:40,527 INFO L226 Difference]: Without dead ends: 0 [2022-02-15 14:48:40,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-15 14:48:40,528 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 14:48:40,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 31 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 14:48:40,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-15 14:48:40,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-15 14:48:40,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:40,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-15 14:48:40,529 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2022-02-15 14:48:40,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 14:48:40,529 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-15 14:48:40,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 14:48:40,529 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-15 14:48:40,529 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-15 14:48:40,531 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-02-15 14:48:40,532 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-02-15 14:48:40,532 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-02-15 14:48:40,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 14:48:40,535 INFO L732 BasicCegarLoop]: Path program histogram: [5] [2022-02-15 14:48:40,536 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-15 14:48:40,536 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-15 14:48:40,538 INFO L202 PluginConnector]: Adding new model easy7.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.02 02:48:40 BasicIcfg [2022-02-15 14:48:40,538 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-15 14:48:40,539 INFO L158 Benchmark]: Toolchain (without parser) took 1811.55ms. Allocated memory was 195.0MB in the beginning and 275.8MB in the end (delta: 80.7MB). Free memory was 160.1MB in the beginning and 198.1MB in the end (delta: -38.0MB). Peak memory consumption was 43.8MB. Max. memory is 8.0GB. [2022-02-15 14:48:40,539 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.09ms. Allocated memory is still 195.0MB. Free memory was 161.3MB in the beginning and 161.1MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-15 14:48:40,539 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.23ms. Allocated memory is still 195.0MB. Free memory was 160.1MB in the beginning and 158.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-15 14:48:40,539 INFO L158 Benchmark]: Boogie Preprocessor took 8.41ms. Allocated memory is still 195.0MB. Free memory was 158.6MB in the beginning and 157.7MB in the end (delta: 899.6kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-15 14:48:40,540 INFO L158 Benchmark]: RCFGBuilder took 190.00ms. Allocated memory is still 195.0MB. Free memory was 157.7MB in the beginning and 149.5MB in the end (delta: 8.1MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2022-02-15 14:48:40,540 INFO L158 Benchmark]: TraceAbstraction took 1590.12ms. Allocated memory was 195.0MB in the beginning and 275.8MB in the end (delta: 80.7MB). Free memory was 149.1MB in the beginning and 198.1MB in the end (delta: -49.0MB). Peak memory consumption was 32.2MB. Max. memory is 8.0GB. [2022-02-15 14:48:40,541 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 0.09ms. Allocated memory is still 195.0MB. Free memory was 161.3MB in the beginning and 161.1MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 19.23ms. Allocated memory is still 195.0MB. Free memory was 160.1MB in the beginning and 158.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 8.41ms. Allocated memory is still 195.0MB. Free memory was 158.6MB in the beginning and 157.7MB in the end (delta: 899.6kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 190.00ms. Allocated memory is still 195.0MB. Free memory was 157.7MB in the beginning and 149.5MB in the end (delta: 8.1MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * TraceAbstraction took 1590.12ms. Allocated memory was 195.0MB in the beginning and 275.8MB in the end (delta: 80.7MB). Free memory was 149.1MB in the beginning and 198.1MB in the end (delta: -49.0MB). Peak memory consumption was 32.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 39]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 36 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 1.5s, OverallIterations: 5, TraceHistogramMax: 1, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 40 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 40 mSDsluCounter, 213 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 324 mSDsCounter, 60 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 835 IncrementalHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 60 mSolverCounterUnsat, 53 mSDtfsCounter, 835 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 8 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=1, InterpolantAutomatonStates: 35, 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, 5 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 85 NumberOfCodeBlocks, 85 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 80 ConstructedInterpolants, 0 QuantifiedInterpolants, 666 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-02-15 14:48:40,565 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...