/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/chl/node-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 12:21:18,090 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 12:21:18,092 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 12:21:18,129 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 12:21:18,177 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 [2021-08-21 12:21:18,210 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 12:21:18,210 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 12:21:18,211 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 12:21:18,211 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 12:21:18,213 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 12:21:18,213 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 12:21:18,213 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 12:21:18,214 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 12:21:18,214 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 12:21:18,214 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 12:21:18,214 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 12:21:18,215 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 12:21:18,215 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 12:21:18,215 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 12:21:18,215 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 12:21:18,215 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 12:21:18,215 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 12:21:18,215 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 12:21:18,215 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 12:21:18,216 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 12:21:18,216 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 12:21:18,216 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 12:21:18,216 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 12:21:18,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:21:18,216 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 12:21:18,216 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 12:21:18,217 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 12:21:18,217 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 12:21:18,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 12:21:18,217 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 12:21:18,217 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 12:21:18,217 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 12:21:18,471 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 12:21:18,486 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 12:21:18,488 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 12:21:18,489 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 12:21:18,489 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 12:21:18,490 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/node-symm.wvr.bpl [2021-08-21 12:21:18,490 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/node-symm.wvr.bpl' [2021-08-21 12:21:18,519 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 12:21:18,521 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 12:21:18,522 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 12:21:18,522 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 12:21:18,522 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 12:21:18,538 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "node-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:21:18" (1/1) ... [2021-08-21 12:21:18,543 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "node-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:21:18" (1/1) ... [2021-08-21 12:21:18,548 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 12:21:18,549 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 12:21:18,549 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 12:21:18,549 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 12:21:18,554 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "node-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:21:18" (1/1) ... [2021-08-21 12:21:18,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "node-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:21:18" (1/1) ... [2021-08-21 12:21:18,555 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "node-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:21:18" (1/1) ... [2021-08-21 12:21:18,555 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "node-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:21:18" (1/1) ... [2021-08-21 12:21:18,557 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "node-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:21:18" (1/1) ... [2021-08-21 12:21:18,557 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "node-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:21:18" (1/1) ... [2021-08-21 12:21:18,558 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "node-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:21:18" (1/1) ... [2021-08-21 12:21:18,558 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 12:21:18,559 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 12:21:18,559 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 12:21:18,559 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 12:21:18,561 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "node-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:21:18" (1/1) ... [2021-08-21 12:21:18,565 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:21:18,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:21:18,580 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) [2021-08-21 12:21:18,597 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 [2021-08-21 12:21:18,615 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 12:21:18,615 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 12:21:18,615 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 12:21:18,615 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 12:21:18,615 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 12:21:18,615 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 12:21:18,616 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 12:21:18,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 12:21:18,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 12:21:18,617 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 12:21:18,739 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 12:21:18,739 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 12:21:18,741 INFO L202 PluginConnector]: Adding new model node-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:21:18 BoogieIcfgContainer [2021-08-21 12:21:18,741 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 12:21:18,742 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 12:21:18,742 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 12:21:18,744 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 12:21:18,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "node-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:21:18" (1/2) ... [2021-08-21 12:21:18,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ef446dc and model type node-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 12:21:18, skipping insertion in model container [2021-08-21 12:21:18,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "node-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:21:18" (2/2) ... [2021-08-21 12:21:18,745 INFO L111 eAbstractionObserver]: Analyzing ICFG node-symm.wvr.bpl [2021-08-21 12:21:18,748 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 12:21:18,749 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 12:21:18,749 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 12:21:18,749 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 12:21:18,768 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-21 12:21:18,793 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 12:21:18,797 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 [2021-08-21 12:21:18,797 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-21 12:21:18,802 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 14 transitions, 44 flow [2021-08-21 12:21:18,809 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:18,810 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:18,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-21 12:21:18,814 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:21:18,814 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:21:18,815 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:21:18,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:21:18,818 INFO L82 PathProgramCache]: Analyzing trace with hash 456033341, now seen corresponding path program 1 times [2021-08-21 12:21:18,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:21:18,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329195085] [2021-08-21 12:21:18,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:21:18,835 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:21:18,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:21:19,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:19,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:21:19,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329195085] [2021-08-21 12:21:19,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329195085] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:21:19,396 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:21:19,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 12:21:19,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395530623] [2021-08-21 12:21:19,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:21:19,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:21:19,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:21:19,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:21:19,410 INFO L87 Difference]: Start difference. First operand has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:19,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:21:19,452 INFO L93 Difference]: Finished difference Result 26 states and 34 transitions. [2021-08-21 12:21:19,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 12:21:19,453 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-08-21 12:21:19,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:21:19,458 INFO L225 Difference]: With dead ends: 26 [2021-08-21 12:21:19,458 INFO L226 Difference]: Without dead ends: 14 [2021-08-21 12:21:19,459 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 85.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:21:19,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-08-21 12:21:19,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-08-21 12:21:19,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:19,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-08-21 12:21:19,475 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2021-08-21 12:21:19,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:21:19,475 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-08-21 12:21:19,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:19,476 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-08-21 12:21:19,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-21 12:21:19,476 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:21:19,476 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:21:19,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 12:21:19,476 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:21:19,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:21:19,477 INFO L82 PathProgramCache]: Analyzing trace with hash 485376701, now seen corresponding path program 2 times [2021-08-21 12:21:19,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:21:19,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594488404] [2021-08-21 12:21:19,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:21:19,477 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:21:19,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:21:19,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:19,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:21:19,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594488404] [2021-08-21 12:21:19,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594488404] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:21:19,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:21:19,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 12:21:19,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286467626] [2021-08-21 12:21:19,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:21:19,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:21:19,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:21:19,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:21:19,735 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:19,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:21:19,777 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2021-08-21 12:21:19,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 12:21:19,777 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-08-21 12:21:19,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:21:19,777 INFO L225 Difference]: With dead ends: 12 [2021-08-21 12:21:19,777 INFO L226 Difference]: Without dead ends: 0 [2021-08-21 12:21:19,778 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:21:19,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-21 12:21:19,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-21 12:21:19,779 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) [2021-08-21 12:21:19,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-21 12:21:19,779 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2021-08-21 12:21:19,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:21:19,779 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-21 12:21:19,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:19,779 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-21 12:21:19,780 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-21 12:21:19,787 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 12:21:19,787 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 12:21:19,787 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 12:21:19,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 12:21:19,790 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 12:21:19,790 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 12:21:19,791 INFO L202 PluginConnector]: Adding new model node-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 12:21:19 BasicIcfg [2021-08-21 12:21:19,792 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 12:21:19,793 INFO L168 Benchmark]: Toolchain (without parser) took 1271.64 ms. Allocated memory is still 191.9 MB. Free memory was 171.6 MB in the beginning and 174.7 MB in the end (delta: -3.1 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2021-08-21 12:21:19,793 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 191.9 MB. Free memory was 172.7 MB in the beginning and 172.6 MB in the end (delta: 73.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 12:21:19,793 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.58 ms. Allocated memory is still 191.9 MB. Free memory was 171.5 MB in the beginning and 169.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 12:21:19,794 INFO L168 Benchmark]: Boogie Preprocessor took 9.44 ms. Allocated memory is still 191.9 MB. Free memory was 169.9 MB in the beginning and 169.0 MB in the end (delta: 913.1 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 12:21:19,794 INFO L168 Benchmark]: RCFGBuilder took 181.72 ms. Allocated memory is still 191.9 MB. Free memory was 168.9 MB in the beginning and 156.2 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-08-21 12:21:19,794 INFO L168 Benchmark]: TraceAbstraction took 1049.81 ms. Allocated memory is still 191.9 MB. Free memory was 155.7 MB in the beginning and 174.7 MB in the end (delta: -19.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2021-08-21 12:21:19,796 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 0.10 ms. Allocated memory is still 191.9 MB. Free memory was 172.7 MB in the beginning and 172.6 MB in the end (delta: 73.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 26.58 ms. Allocated memory is still 191.9 MB. Free memory was 171.5 MB in the beginning and 169.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 9.44 ms. Allocated memory is still 191.9 MB. Free memory was 169.9 MB in the beginning and 169.0 MB in the end (delta: 913.1 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 181.72 ms. Allocated memory is still 191.9 MB. Free memory was 168.9 MB in the beginning and 156.2 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1049.81 ms. Allocated memory is still 191.9 MB. Free memory was 155.7 MB in the beginning and 174.7 MB in the end (delta: -19.0 MB). Peak memory consumption was 4.2 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: 50]: 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, 23 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 997.8ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 4.9ms, AutomataDifference: 101.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 21 SDtfs, 14 SDslu, 17 SDs, 0 SdLazy, 8 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 159.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, InterpolantAutomatonStates: 8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 9.0ms AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 4.7ms SsaConstructionTime, 54.4ms SatisfiabilityAnalysisTime, 690.7ms InterpolantComputationTime, 20 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 452 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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! [2021-08-21 12:21:19,849 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...