/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 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 15:37:44,499 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 15:37:44,500 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 15:37:44,529 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-06 15:37:44,574 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-08-06 15:37:44,602 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 15:37:44,602 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 15:37:44,603 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-06 15:37:44,603 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-06 15:37:44,605 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 15:37:44,605 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 15:37:44,605 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 15:37:44,606 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 15:37:44,606 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 15:37:44,606 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 15:37:44,606 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 15:37:44,607 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 15:37:44,607 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 15:37:44,607 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 15:37:44,607 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 15:37:44,607 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 15:37:44,607 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 15:37:44,607 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 15:37:44,607 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 15:37:44,607 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 15:37:44,607 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 15:37:44,608 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 15:37:44,608 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 15:37:44,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 15:37:44,608 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 15:37:44,608 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 15:37:44,608 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 15:37:44,608 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 15:37:44,609 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 15:37:44,609 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 15:37:44,609 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 15:37:44,609 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 15:37:44,861 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 15:37:44,888 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 15:37:44,890 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 15:37:44,890 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 15:37:44,891 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 15:37:44,892 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy7.wvr.bpl [2021-08-06 15:37:44,892 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy7.wvr.bpl' [2021-08-06 15:37:44,912 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 15:37:44,914 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 15:37:44,914 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 15:37:44,915 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 15:37:44,915 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 15:37:44,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "easy7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:37:44" (1/1) ... [2021-08-06 15:37:44,928 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "easy7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:37:44" (1/1) ... [2021-08-06 15:37:44,934 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 15:37:44,935 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 15:37:44,935 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 15:37:44,936 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 15:37:44,941 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "easy7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:37:44" (1/1) ... [2021-08-06 15:37:44,941 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "easy7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:37:44" (1/1) ... [2021-08-06 15:37:44,942 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "easy7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:37:44" (1/1) ... [2021-08-06 15:37:44,942 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "easy7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:37:44" (1/1) ... [2021-08-06 15:37:44,944 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "easy7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:37:44" (1/1) ... [2021-08-06 15:37:44,945 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "easy7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:37:44" (1/1) ... [2021-08-06 15:37:44,945 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "easy7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:37:44" (1/1) ... [2021-08-06 15:37:44,946 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 15:37:44,946 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 15:37:44,947 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 15:37:44,947 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 15:37:44,948 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "easy7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:37:44" (1/1) ... [2021-08-06 15:37:44,953 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 15:37:44,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:37:44,974 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) [2021-08-06 15:37:45,002 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 [2021-08-06 15:37:45,015 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 15:37:45,015 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 15:37:45,015 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 15:37:45,016 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 15:37:45,016 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 15:37:45,016 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 15:37:45,016 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 15:37:45,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 15:37:45,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 15:37:45,017 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-06 15:37:45,133 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 15:37:45,133 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-06 15:37:45,134 INFO L202 PluginConnector]: Adding new model easy7.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 03:37:45 BoogieIcfgContainer [2021-08-06 15:37:45,135 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 15:37:45,136 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 15:37:45,136 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 15:37:45,138 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 15:37:45,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "easy7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:37:44" (1/2) ... [2021-08-06 15:37:45,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fb1cf51 and model type easy7.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 03:37:45, skipping insertion in model container [2021-08-06 15:37:45,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "easy7.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 03:37:45" (2/2) ... [2021-08-06 15:37:45,139 INFO L111 eAbstractionObserver]: Analyzing ICFG easy7.wvr.bpl [2021-08-06 15:37:45,150 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 15:37:45,150 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 15:37:45,150 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 15:37:45,151 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 15:37:45,196 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-06 15:37:45,236 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 15:37:45,242 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-08-06 15:37:45,243 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-06 15:37:45,250 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 21 transitions, 58 flow [2021-08-06 15:37:45,268 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) [2021-08-06 15:37:45,270 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) [2021-08-06 15:37:45,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 15:37:45,275 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:37:45,276 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:37:45,276 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:37:45,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:37:45,281 INFO L82 PathProgramCache]: Analyzing trace with hash -908875181, now seen corresponding path program 1 times [2021-08-06 15:37:45,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:37:45,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628862242] [2021-08-06 15:37:45,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:37:45,288 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:37:45,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:37:45,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:37:45,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:37:45,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628862242] [2021-08-06 15:37:45,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628862242] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:37:45,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:37:45,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-06 15:37:45,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009949140] [2021-08-06 15:37:45,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 15:37:45,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:37:45,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 15:37:45,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-06 15:37:45,645 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) [2021-08-06 15:37:45,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:37:45,766 INFO L93 Difference]: Finished difference Result 75 states and 122 transitions. [2021-08-06 15:37:45,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 15:37:45,767 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 [2021-08-06 15:37:45,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:37:45,774 INFO L225 Difference]: With dead ends: 75 [2021-08-06 15:37:45,774 INFO L226 Difference]: Without dead ends: 54 [2021-08-06 15:37:45,776 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 59.0ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-06 15:37:45,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-06 15:37:45,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-08-06 15:37:45,805 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) [2021-08-06 15:37:45,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 86 transitions. [2021-08-06 15:37:45,808 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 86 transitions. Word has length 17 [2021-08-06 15:37:45,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:37:45,808 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 86 transitions. [2021-08-06 15:37:45,808 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) [2021-08-06 15:37:45,808 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 86 transitions. [2021-08-06 15:37:45,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 15:37:45,809 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:37:45,809 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:37:45,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 15:37:45,810 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:37:45,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:37:45,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1652015375, now seen corresponding path program 2 times [2021-08-06 15:37:45,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:37:45,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105948316] [2021-08-06 15:37:45,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:37:45,814 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:37:45,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:37:45,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:37:45,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:37:45,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105948316] [2021-08-06 15:37:45,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105948316] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:37:45,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:37:45,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-06 15:37:45,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763775253] [2021-08-06 15:37:45,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 15:37:45,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:37:45,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 15:37:45,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-06 15:37:45,977 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) [2021-08-06 15:37:46,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:37:46,082 INFO L93 Difference]: Finished difference Result 74 states and 117 transitions. [2021-08-06 15:37:46,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 15:37:46,082 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 [2021-08-06 15:37:46,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:37:46,084 INFO L225 Difference]: With dead ends: 74 [2021-08-06 15:37:46,084 INFO L226 Difference]: Without dead ends: 48 [2021-08-06 15:37:46,084 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.3ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-06 15:37:46,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-08-06 15:37:46,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2021-08-06 15:37:46,093 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) [2021-08-06 15:37:46,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 69 transitions. [2021-08-06 15:37:46,094 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 69 transitions. Word has length 17 [2021-08-06 15:37:46,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:37:46,094 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 69 transitions. [2021-08-06 15:37:46,094 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) [2021-08-06 15:37:46,094 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 69 transitions. [2021-08-06 15:37:46,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 15:37:46,095 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:37:46,095 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:37:46,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 15:37:46,096 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:37:46,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:37:46,097 INFO L82 PathProgramCache]: Analyzing trace with hash 666384083, now seen corresponding path program 3 times [2021-08-06 15:37:46,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:37:46,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448640446] [2021-08-06 15:37:46,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:37:46,099 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:37:46,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:37:46,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:37:46,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:37:46,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448640446] [2021-08-06 15:37:46,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448640446] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:37:46,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:37:46,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-06 15:37:46,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037970134] [2021-08-06 15:37:46,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 15:37:46,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:37:46,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 15:37:46,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-06 15:37:46,228 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) [2021-08-06 15:37:46,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:37:46,332 INFO L93 Difference]: Finished difference Result 62 states and 94 transitions. [2021-08-06 15:37:46,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 15:37:46,333 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 [2021-08-06 15:37:46,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:37:46,334 INFO L225 Difference]: With dead ends: 62 [2021-08-06 15:37:46,334 INFO L226 Difference]: Without dead ends: 36 [2021-08-06 15:37:46,334 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.8ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-06 15:37:46,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-08-06 15:37:46,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-08-06 15:37:46,341 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) [2021-08-06 15:37:46,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 50 transitions. [2021-08-06 15:37:46,348 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 50 transitions. Word has length 17 [2021-08-06 15:37:46,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:37:46,348 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 50 transitions. [2021-08-06 15:37:46,348 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) [2021-08-06 15:37:46,348 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 50 transitions. [2021-08-06 15:37:46,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 15:37:46,349 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:37:46,349 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:37:46,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-06 15:37:46,349 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:37:46,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:37:46,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1690636559, now seen corresponding path program 4 times [2021-08-06 15:37:46,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:37:46,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716063553] [2021-08-06 15:37:46,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:37:46,350 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:37:46,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:37:46,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:37:46,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:37:46,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716063553] [2021-08-06 15:37:46,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716063553] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:37:46,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:37:46,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-06 15:37:46,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280307236] [2021-08-06 15:37:46,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 15:37:46,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:37:46,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 15:37:46,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-06 15:37:46,461 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) [2021-08-06 15:37:46,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:37:46,547 INFO L93 Difference]: Finished difference Result 48 states and 67 transitions. [2021-08-06 15:37:46,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 15:37:46,548 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 [2021-08-06 15:37:46,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:37:46,548 INFO L225 Difference]: With dead ends: 48 [2021-08-06 15:37:46,548 INFO L226 Difference]: Without dead ends: 24 [2021-08-06 15:37:46,548 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.5ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-06 15:37:46,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-08-06 15:37:46,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-08-06 15:37:46,549 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) [2021-08-06 15:37:46,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-08-06 15:37:46,549 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 17 [2021-08-06 15:37:46,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:37:46,550 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-08-06 15:37:46,550 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) [2021-08-06 15:37:46,550 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-08-06 15:37:46,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 15:37:46,550 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:37:46,550 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:37:46,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-06 15:37:46,550 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:37:46,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:37:46,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1226320173, now seen corresponding path program 5 times [2021-08-06 15:37:46,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:37:46,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861219315] [2021-08-06 15:37:46,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:37:46,551 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:37:46,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:37:46,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:37:46,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:37:46,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861219315] [2021-08-06 15:37:46,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861219315] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:37:46,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:37:46,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-06 15:37:46,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74162093] [2021-08-06 15:37:46,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 15:37:46,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:37:46,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 15:37:46,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-06 15:37:46,659 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) [2021-08-06 15:37:46,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:37:46,683 INFO L93 Difference]: Finished difference Result 22 states and 27 transitions. [2021-08-06 15:37:46,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 15:37:46,683 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 [2021-08-06 15:37:46,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:37:46,684 INFO L225 Difference]: With dead ends: 22 [2021-08-06 15:37:46,684 INFO L226 Difference]: Without dead ends: 0 [2021-08-06 15:37:46,684 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.2ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-06 15:37:46,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-06 15:37:46,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-06 15:37:46,684 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) [2021-08-06 15:37:46,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-06 15:37:46,684 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2021-08-06 15:37:46,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:37:46,684 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-06 15:37:46,685 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) [2021-08-06 15:37:46,685 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-06 15:37:46,685 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-06 15:37:46,687 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-06 15:37:46,696 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 15:37:46,697 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 15:37:46,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-06 15:37:46,700 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 15:37:46,700 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 15:37:46,701 INFO L202 PluginConnector]: Adding new model easy7.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 03:37:46 BasicIcfg [2021-08-06 15:37:46,701 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 15:37:46,702 INFO L168 Benchmark]: Toolchain (without parser) took 1788.23 ms. Allocated memory is still 199.2 MB. Free memory was 179.3 MB in the beginning and 122.0 MB in the end (delta: 57.3 MB). Peak memory consumption was 58.3 MB. Max. memory is 8.0 GB. [2021-08-06 15:37:46,702 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 199.2 MB. Free memory is still 180.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 15:37:46,702 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.67 ms. Allocated memory is still 199.2 MB. Free memory was 179.2 MB in the beginning and 177.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 15:37:46,702 INFO L168 Benchmark]: Boogie Preprocessor took 11.32 ms. Allocated memory is still 199.2 MB. Free memory was 177.7 MB in the beginning and 176.8 MB in the end (delta: 889.9 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 15:37:46,702 INFO L168 Benchmark]: RCFGBuilder took 188.20 ms. Allocated memory is still 199.2 MB. Free memory was 176.8 MB in the beginning and 167.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-08-06 15:37:46,703 INFO L168 Benchmark]: TraceAbstraction took 1565.57 ms. Allocated memory is still 199.2 MB. Free memory was 166.7 MB in the beginning and 122.0 MB in the end (delta: 44.7 MB). Peak memory consumption was 45.7 MB. Max. memory is 8.0 GB. [2021-08-06 15:37:46,703 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 199.2 MB. Free memory is still 180.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 19.67 ms. Allocated memory is still 199.2 MB. Free memory was 179.2 MB in the beginning and 177.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 11.32 ms. Allocated memory is still 199.2 MB. Free memory was 177.7 MB in the beginning and 176.8 MB in the end (delta: 889.9 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 188.20 ms. Allocated memory is still 199.2 MB. Free memory was 176.8 MB in the beginning and 167.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1565.57 ms. Allocated memory is still 199.2 MB. Free memory was 166.7 MB in the beginning and 122.0 MB in the end (delta: 44.7 MB). Peak memory consumption was 45.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms 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 for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 36 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 1464.7ms, OverallIterations: 5, TraceHistogramMax: 1, EmptinessCheckTime: 9.3ms, AutomataDifference: 470.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 26.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 93 SDtfs, 40 SDslu, 324 SDs, 0 SdLazy, 631 SolverSat, 60 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 306.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 8 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 180.0ms Time, 0.0ms 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, 0.0ms DumpTime, AutomataMinimizationStatistics: 46.4ms AutomataMinimizationTime, 5 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 14.8ms SsaConstructionTime, 57.9ms SatisfiabilityAnalysisTime, 720.8ms InterpolantComputationTime, 85 NumberOfCodeBlocks, 85 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 80 ConstructedInterpolants, 0 QuantifiedInterpolants, 502 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! [2021-08-06 15:37:46,725 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...