/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/regression/join_assign_global.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 15:23:31,824 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 15:23:31,826 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 15:23:31,891 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-15 15:23:31,937 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-03-15 15:23:31,958 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 15:23:31,959 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 15:23:31,959 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-15 15:23:31,959 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-15 15:23:31,960 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 15:23:31,960 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 15:23:31,960 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 15:23:31,960 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 15:23:31,961 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 15:23:31,961 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 15:23:31,961 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 15:23:31,961 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 15:23:31,961 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 15:23:31,962 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 15:23:31,962 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 15:23:31,962 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 15:23:31,962 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 15:23:31,962 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 15:23:31,962 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 15:23:31,962 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 15:23:31,962 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 15:23:31,962 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 15:23:31,963 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 15:23:31,963 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 15:23:31,963 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 15:23:31,963 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 15:23:31,963 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 15:23:31,964 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-15 15:23:31,964 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 15:23:31,964 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 15:23:31,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 15:23:31,964 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-15 15:23:31,964 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 15:23:31,965 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 15:23:32,170 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 15:23:32,189 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 15:23:32,191 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 15:23:32,191 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 15:23:32,193 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 15:23:32,194 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/join_assign_global.bpl [2022-03-15 15:23:32,194 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/join_assign_global.bpl' [2022-03-15 15:23:32,209 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 15:23:32,210 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 15:23:32,210 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 15:23:32,211 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 15:23:32,211 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 15:23:32,219 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "join_assign_global.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:23:32" (1/1) ... [2022-03-15 15:23:32,223 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "join_assign_global.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:23:32" (1/1) ... [2022-03-15 15:23:32,230 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 15:23:32,231 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 15:23:32,232 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 15:23:32,232 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 15:23:32,233 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 15:23:32,238 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "join_assign_global.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:23:32" (1/1) ... [2022-03-15 15:23:32,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "join_assign_global.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:23:32" (1/1) ... [2022-03-15 15:23:32,239 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "join_assign_global.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:23:32" (1/1) ... [2022-03-15 15:23:32,239 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "join_assign_global.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:23:32" (1/1) ... [2022-03-15 15:23:32,241 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "join_assign_global.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:23:32" (1/1) ... [2022-03-15 15:23:32,241 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "join_assign_global.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:23:32" (1/1) ... [2022-03-15 15:23:32,242 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "join_assign_global.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:23:32" (1/1) ... [2022-03-15 15:23:32,243 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 15:23:32,244 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 15:23:32,244 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 15:23:32,245 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 15:23:32,246 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "join_assign_global.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:23:32" (1/1) ... [2022-03-15 15:23:32,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 15:23:32,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:23:32,272 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-15 15:23:32,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-15 15:23:32,314 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread0 given in one single declaration [2022-03-15 15:23:32,314 INFO L130 BoogieDeclarations]: Found specification of procedure thread0 [2022-03-15 15:23:32,314 INFO L138 BoogieDeclarations]: Found implementation of procedure thread0 [2022-03-15 15:23:32,314 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-15 15:23:32,314 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 15:23:32,314 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 15:23:32,314 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-15 15:23:32,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 15:23:32,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 15:23:32,315 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-15 15:23:32,343 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 15:23:32,344 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 15:23:32,388 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 15:23:32,394 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 15:23:32,394 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-15 15:23:32,397 INFO L202 PluginConnector]: Adding new model join_assign_global.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 03:23:32 BoogieIcfgContainer [2022-03-15 15:23:32,397 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 15:23:32,400 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 15:23:32,401 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 15:23:32,404 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 15:23:32,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "join_assign_global.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:23:32" (1/2) ... [2022-03-15 15:23:32,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@434095d9 and model type join_assign_global.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 03:23:32, skipping insertion in model container [2022-03-15 15:23:32,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "join_assign_global.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 03:23:32" (2/2) ... [2022-03-15 15:23:32,407 INFO L111 eAbstractionObserver]: Analyzing ICFG join_assign_global.bpl [2022-03-15 15:23:32,413 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 15:23:32,413 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-15 15:23:32,413 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 15:23:32,413 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 15:23:32,436 WARN L322 ript$VariableManager]: TermVariabe thread0Thread1of1ForFork0_z not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 15:23:32,438 WARN L322 ript$VariableManager]: TermVariabe thread0Thread1of1ForFork0_z not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 15:23:32,444 WARN L322 ript$VariableManager]: TermVariabe thread0Thread1of1ForFork0_z not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 15:23:32,452 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-15 15:23:32,497 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 15:23:32,504 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-15 15:23:32,504 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-15 15:23:32,513 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 13 transitions, 39 flow [2022-03-15 15:23:32,525 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 19 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:23:32,527 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:23:32,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-03-15 15:23:32,531 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:23:32,532 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2022-03-15 15:23:32,532 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:23:32,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:23:32,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1694694, now seen corresponding path program 1 times [2022-03-15 15:23:32,543 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:23:32,543 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780745874] [2022-03-15 15:23:32,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:23:32,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:23:32,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:23:32,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:23:32,654 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:23:32,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780745874] [2022-03-15 15:23:32,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780745874] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:23:32,654 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:23:32,654 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-15 15:23:32,656 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140898636] [2022-03-15 15:23:32,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:23:32,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 15:23:32,659 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:23:32,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 15:23:32,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 15:23:32,689 INFO L87 Difference]: Start difference. First operand has 19 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:23:32,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:23:32,725 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2022-03-15 15:23:32,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 15:23:32,727 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-03-15 15:23:32,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:23:32,732 INFO L225 Difference]: With dead ends: 18 [2022-03-15 15:23:32,732 INFO L226 Difference]: Without dead ends: 14 [2022-03-15 15:23:32,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 15:23:32,736 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 3 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:23:32,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 11 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:23:32,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-03-15 15:23:32,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-03-15 15:23:32,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 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) [2022-03-15 15:23:32,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2022-03-15 15:23:32,763 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 4 [2022-03-15 15:23:32,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:23:32,763 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2022-03-15 15:23:32,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:23:32,763 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2022-03-15 15:23:32,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-03-15 15:23:32,764 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:23:32,764 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:23:32,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 15:23:32,764 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:23:32,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:23:32,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1246605728, now seen corresponding path program 1 times [2022-03-15 15:23:32,765 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:23:32,765 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588975840] [2022-03-15 15:23:32,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:23:32,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:23:32,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-15 15:23:32,783 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-15 15:23:32,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-15 15:23:32,829 INFO L138 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-15 15:23:32,830 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-03-15 15:23:32,831 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-03-15 15:23:32,832 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-03-15 15:23:32,832 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-03-15 15:23:32,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-15 15:23:32,836 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2022-03-15 15:23:32,839 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-15 15:23:32,839 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-15 15:23:32,851 INFO L202 PluginConnector]: Adding new model join_assign_global.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.03 03:23:32 BasicIcfg [2022-03-15 15:23:32,851 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-15 15:23:32,853 INFO L158 Benchmark]: Toolchain (without parser) took 641.79ms. Allocated memory was 177.2MB in the beginning and 228.6MB in the end (delta: 51.4MB). Free memory was 143.2MB in the beginning and 208.2MB in the end (delta: -65.1MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 15:23:32,853 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.10ms. Allocated memory is still 177.2MB. Free memory was 144.1MB in the beginning and 144.0MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 15:23:32,856 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.01ms. Allocated memory is still 177.2MB. Free memory was 143.0MB in the beginning and 141.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-15 15:23:32,856 INFO L158 Benchmark]: Boogie Preprocessor took 11.43ms. Allocated memory is still 177.2MB. Free memory was 141.5MB in the beginning and 140.7MB in the end (delta: 827.9kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 15:23:32,858 INFO L158 Benchmark]: RCFGBuilder took 153.35ms. Allocated memory is still 177.2MB. Free memory was 140.6MB in the beginning and 132.9MB in the end (delta: 7.7MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2022-03-15 15:23:32,859 INFO L158 Benchmark]: TraceAbstraction took 451.09ms. Allocated memory was 177.2MB in the beginning and 228.6MB in the end (delta: 51.4MB). Free memory was 132.4MB in the beginning and 208.2MB in the end (delta: -75.8MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 15:23:32,864 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 0.10ms. Allocated memory is still 177.2MB. Free memory was 144.1MB in the beginning and 144.0MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 21.01ms. Allocated memory is still 177.2MB. Free memory was 143.0MB in the beginning and 141.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 11.43ms. Allocated memory is still 177.2MB. Free memory was 141.5MB in the beginning and 140.7MB in the end (delta: 827.9kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 153.35ms. Allocated memory is still 177.2MB. Free memory was 140.6MB in the beginning and 132.9MB in the end (delta: 7.7MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * TraceAbstraction took 451.09ms. Allocated memory was 177.2MB in the beginning and 228.6MB in the end (delta: 51.4MB). Free memory was 132.4MB in the beginning and 208.2MB in the end (delta: -75.8MB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 20]: assertion can be violated assertion can be violated We found a FailurePath: [L17] FORK 0 fork 0 thread0(); [L25] 1 z := 1; VAL [z=1] [L18] FORK 0 fork 1, 1 thread1(); VAL [z=1] [L19] 0 x := 0; VAL [x=0, z=1] [L31] JOIN 1 join 0 assign x; VAL [x=1, z=1] [L20] 0 assert x == 0; VAL [x=1, z=1] - UnprovableResult [Line: 14]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 17]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 21 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3 mSDsluCounter, 11 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9 IncrementalHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 8 mSDtfsCounter, 9 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 3 ConstructedInterpolants, 0 QuantifiedInterpolants, 5 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-03-15 15:23:32,889 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...