/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/parallel/ticket-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 14:47:23,093 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 14:47:23,096 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 14:47:23,138 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-06 14:47:23,201 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 14:47:23,233 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 14:47:23,233 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 14:47:23,234 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-06 14:47:23,234 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-06 14:47:23,236 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 14:47:23,237 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 14:47:23,237 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 14:47:23,237 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 14:47:23,237 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 14:47:23,237 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 14:47:23,238 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 14:47:23,238 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 14:47:23,238 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 14:47:23,239 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 14:47:23,239 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 14:47:23,239 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 14:47:23,239 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 14:47:23,239 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 14:47:23,239 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 14:47:23,239 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 14:47:23,240 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 14:47:23,240 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 14:47:23,240 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 14:47:23,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 14:47:23,240 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 14:47:23,240 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 14:47:23,240 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 14:47:23,240 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 14:47:23,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 14:47:23,241 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 14:47:23,241 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 14:47:23,241 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 14:47:23,518 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 14:47:23,538 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 14:47:23,540 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 14:47:23,541 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 14:47:23,542 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 14:47:23,543 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/ticket-2.wvr.bpl [2021-08-06 14:47:23,543 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/ticket-2.wvr.bpl' [2021-08-06 14:47:23,570 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 14:47:23,572 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 14:47:23,573 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 14:47:23,573 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 14:47:23,573 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 14:47:23,584 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ticket-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:47:23" (1/1) ... [2021-08-06 14:47:23,590 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ticket-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:47:23" (1/1) ... [2021-08-06 14:47:23,597 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 14:47:23,598 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 14:47:23,599 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 14:47:23,599 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 14:47:23,605 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ticket-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:47:23" (1/1) ... [2021-08-06 14:47:23,606 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ticket-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:47:23" (1/1) ... [2021-08-06 14:47:23,606 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ticket-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:47:23" (1/1) ... [2021-08-06 14:47:23,606 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ticket-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:47:23" (1/1) ... [2021-08-06 14:47:23,608 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ticket-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:47:23" (1/1) ... [2021-08-06 14:47:23,609 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ticket-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:47:23" (1/1) ... [2021-08-06 14:47:23,609 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ticket-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:47:23" (1/1) ... [2021-08-06 14:47:23,610 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 14:47:23,611 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 14:47:23,611 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 14:47:23,611 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 14:47:23,612 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ticket-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:47:23" (1/1) ... [2021-08-06 14:47:23,618 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 14:47:23,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:47:23,635 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 14:47:23,638 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 14:47:23,683 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 14:47:23,684 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 14:47:23,684 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 14:47:23,684 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 14:47:23,684 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 14:47:23,684 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 14:47:23,685 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 14:47:23,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 14:47:23,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 14:47:23,685 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 14:47:23,882 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 14:47:23,882 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-06 14:47:23,884 INFO L202 PluginConnector]: Adding new model ticket-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 02:47:23 BoogieIcfgContainer [2021-08-06 14:47:23,884 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 14:47:23,886 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 14:47:23,886 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 14:47:23,888 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 14:47:23,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ticket-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:47:23" (1/2) ... [2021-08-06 14:47:23,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@397c60ab and model type ticket-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 02:47:23, skipping insertion in model container [2021-08-06 14:47:23,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ticket-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 02:47:23" (2/2) ... [2021-08-06 14:47:23,891 INFO L111 eAbstractionObserver]: Analyzing ICFG ticket-2.wvr.bpl [2021-08-06 14:47:23,895 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 14:47:23,895 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 14:47:23,895 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 14:47:23,895 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 14:47:23,924 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-06 14:47:23,976 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 14:47:23,982 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 14:47:23,982 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-06 14:47:23,990 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 29 places, 22 transitions, 60 flow [2021-08-06 14:47:24,026 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 60 states, 59 states have (on average 1.694915254237288) internal successors, (100), 59 states have internal predecessors, (100), 0 states have call successors, (0), 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 14:47:24,028 INFO L276 IsEmpty]: Start isEmpty. Operand has 60 states, 59 states have (on average 1.694915254237288) internal successors, (100), 59 states have internal predecessors, (100), 0 states have call successors, (0), 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 14:47:24,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:47:24,049 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:24,051 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:24,052 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:47:24,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:24,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1135520845, now seen corresponding path program 1 times [2021-08-06 14:47:24,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:24,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148177705] [2021-08-06 14:47:24,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:24,071 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:24,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:24,379 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 14:47:24,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:24,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148177705] [2021-08-06 14:47:24,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148177705] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:47:24,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:47:24,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 14:47:24,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085400420] [2021-08-06 14:47:24,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 14:47:24,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:24,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 14:47:24,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:47:24,406 INFO L87 Difference]: Start difference. First operand has 60 states, 59 states have (on average 1.694915254237288) internal successors, (100), 59 states have internal predecessors, (100), 0 states have call successors, (0), 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 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 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 14:47:24,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:24,456 INFO L93 Difference]: Finished difference Result 76 states and 123 transitions. [2021-08-06 14:47:24,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:47:24,459 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2021-08-06 14:47:24,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:24,469 INFO L225 Difference]: With dead ends: 76 [2021-08-06 14:47:24,469 INFO L226 Difference]: Without dead ends: 36 [2021-08-06 14:47:24,472 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 60.5ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:47:24,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-08-06 14:47:24,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-08-06 14:47:24,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 35 states have internal predecessors, (52), 0 states have call successors, (0), 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 14:47:24,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2021-08-06 14:47:24,497 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 18 [2021-08-06 14:47:24,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:24,497 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2021-08-06 14:47:24,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 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 14:47:24,497 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2021-08-06 14:47:24,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:47:24,498 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:24,498 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:24,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 14:47:24,499 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:47:24,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:24,500 INFO L82 PathProgramCache]: Analyzing trace with hash -419510621, now seen corresponding path program 2 times [2021-08-06 14:47:24,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:24,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571017455] [2021-08-06 14:47:24,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:24,501 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:24,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:24,572 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 14:47:24,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:24,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571017455] [2021-08-06 14:47:24,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571017455] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:47:24,573 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:47:24,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 14:47:24,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869358096] [2021-08-06 14:47:24,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 14:47:24,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:24,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 14:47:24,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:47:24,579 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 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 14:47:24,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:24,625 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2021-08-06 14:47:24,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:47:24,626 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2021-08-06 14:47:24,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:24,627 INFO L225 Difference]: With dead ends: 38 [2021-08-06 14:47:24,627 INFO L226 Difference]: Without dead ends: 34 [2021-08-06 14:47:24,628 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:47:24,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-08-06 14:47:24,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-08-06 14:47:24,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 states have internal predecessors, (48), 0 states have call successors, (0), 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 14:47:24,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 48 transitions. [2021-08-06 14:47:24,641 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 48 transitions. Word has length 18 [2021-08-06 14:47:24,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:24,641 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 48 transitions. [2021-08-06 14:47:24,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 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 14:47:24,642 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 48 transitions. [2021-08-06 14:47:24,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:47:24,643 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:47:24,644 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:47:24,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 14:47:24,645 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:47:24,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:47:24,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1871817989, now seen corresponding path program 3 times [2021-08-06 14:47:24,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:47:24,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294072998] [2021-08-06 14:47:24,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:47:24,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:47:24,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:47:24,724 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 14:47:24,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:47:24,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294072998] [2021-08-06 14:47:24,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294072998] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:47:24,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:47:24,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 14:47:24,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964114330] [2021-08-06 14:47:24,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 14:47:24,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:47:24,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 14:47:24,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:47:24,733 INFO L87 Difference]: Start difference. First operand 34 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 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 14:47:24,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:47:24,754 INFO L93 Difference]: Finished difference Result 13 states and 17 transitions. [2021-08-06 14:47:24,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:47:24,755 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2021-08-06 14:47:24,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:47:24,756 INFO L225 Difference]: With dead ends: 13 [2021-08-06 14:47:24,756 INFO L226 Difference]: Without dead ends: 0 [2021-08-06 14:47:24,756 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:47:24,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-06 14:47:24,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-06 14:47:24,758 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 14:47:24,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-06 14:47:24,766 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2021-08-06 14:47:24,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:47:24,766 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-06 14:47:24,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 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 14:47:24,766 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-06 14:47:24,767 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-06 14:47:24,769 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-06 14:47:24,769 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 14:47:24,769 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 14:47:24,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-06 14:47:24,774 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 14:47:24,774 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 14:47:24,776 INFO L202 PluginConnector]: Adding new model ticket-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 02:47:24 BasicIcfg [2021-08-06 14:47:24,776 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 14:47:24,777 INFO L168 Benchmark]: Toolchain (without parser) took 1205.11 ms. Allocated memory is still 185.6 MB. Free memory was 166.1 MB in the beginning and 135.6 MB in the end (delta: 30.5 MB). Peak memory consumption was 31.6 MB. Max. memory is 8.0 GB. [2021-08-06 14:47:24,777 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 185.6 MB. Free memory is still 167.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 14:47:24,778 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.74 ms. Allocated memory is still 185.6 MB. Free memory was 166.1 MB in the beginning and 164.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 14:47:24,778 INFO L168 Benchmark]: Boogie Preprocessor took 11.88 ms. Allocated memory is still 185.6 MB. Free memory was 164.6 MB in the beginning and 163.7 MB in the end (delta: 937.8 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 14:47:24,779 INFO L168 Benchmark]: RCFGBuilder took 273.59 ms. Allocated memory is still 185.6 MB. Free memory was 163.7 MB in the beginning and 152.1 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-08-06 14:47:24,779 INFO L168 Benchmark]: TraceAbstraction took 890.17 ms. Allocated memory is still 185.6 MB. Free memory was 151.7 MB in the beginning and 135.6 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.9 MB. Max. memory is 8.0 GB. [2021-08-06 14:47:24,781 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 0.12 ms. Allocated memory is still 185.6 MB. Free memory is still 167.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 24.74 ms. Allocated memory is still 185.6 MB. Free memory was 166.1 MB in the beginning and 164.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 11.88 ms. Allocated memory is still 185.6 MB. Free memory was 164.6 MB in the beginning and 163.7 MB in the end (delta: 937.8 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 273.59 ms. Allocated memory is still 185.6 MB. Free memory was 163.7 MB in the beginning and 152.1 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 890.17 ms. Allocated memory is still 185.6 MB. Free memory was 151.7 MB in the beginning and 135.6 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.9 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 for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 38 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 814.4ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 25.4ms, AutomataDifference: 162.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 43.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 34 SDtfs, 31 SDslu, 63 SDs, 0 SdLazy, 53 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 48.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 100.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=0, InterpolantAutomatonStates: 15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 37.3ms AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 11.2ms SsaConstructionTime, 53.1ms SatisfiabilityAnalysisTime, 326.1ms InterpolantComputationTime, 54 NumberOfCodeBlocks, 54 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 51 ConstructedInterpolants, 0 QuantifiedInterpolants, 130 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 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 14:47:24,816 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...