/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/fork_unchanged_local_variables2.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-44898dd [2022-02-09 02:15:37,628 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-09 02:15:37,629 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-09 02:15:37,694 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-09 02:15:37,748 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-02-09 02:15:37,777 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-09 02:15:37,777 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-09 02:15:37,778 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-09 02:15:37,778 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-09 02:15:37,778 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-09 02:15:37,779 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-09 02:15:37,779 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-09 02:15:37,779 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-09 02:15:37,779 INFO L138 SettingsManager]: * Use SBE=true [2022-02-09 02:15:37,779 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-09 02:15:37,780 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-09 02:15:37,780 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-09 02:15:37,780 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-09 02:15:37,780 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-09 02:15:37,781 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-09 02:15:37,781 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-09 02:15:37,781 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-09 02:15:37,781 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-09 02:15:37,781 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-09 02:15:37,781 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-09 02:15:37,781 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-09 02:15:37,781 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-09 02:15:37,781 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-09 02:15:37,781 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-09 02:15:37,782 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-09 02:15:37,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-09 02:15:37,782 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-09 02:15:37,782 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-09 02:15:37,782 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-09 02:15:37,782 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-09 02:15:37,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-09 02:15:37,782 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-09 02:15:37,783 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-09 02:15:37,783 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-09 02:15:38,035 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-09 02:15:38,062 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-09 02:15:38,064 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-09 02:15:38,065 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-09 02:15:38,066 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-09 02:15:38,067 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/fork_unchanged_local_variables2.bpl [2022-02-09 02:15:38,068 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/fork_unchanged_local_variables2.bpl' [2022-02-09 02:15:38,088 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-09 02:15:38,089 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-09 02:15:38,091 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-09 02:15:38,091 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-09 02:15:38,091 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-09 02:15:38,100 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 02:15:38" (1/1) ... [2022-02-09 02:15:38,105 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 02:15:38" (1/1) ... [2022-02-09 02:15:38,111 INFO L137 Inliner]: procedures = 2, calls = 1, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-09 02:15:38,112 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-09 02:15:38,114 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-09 02:15:38,114 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-09 02:15:38,114 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-09 02:15:38,119 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 02:15:38" (1/1) ... [2022-02-09 02:15:38,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 02:15:38" (1/1) ... [2022-02-09 02:15:38,121 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 02:15:38" (1/1) ... [2022-02-09 02:15:38,121 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 02:15:38" (1/1) ... [2022-02-09 02:15:38,122 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 02:15:38" (1/1) ... [2022-02-09 02:15:38,125 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 02:15:38" (1/1) ... [2022-02-09 02:15:38,125 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 02:15:38" (1/1) ... [2022-02-09 02:15:38,127 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-09 02:15:38,128 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-09 02:15:38,128 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-09 02:15:38,128 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-09 02:15:38,129 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 02:15:38" (1/1) ... [2022-02-09 02:15:38,134 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-09 02:15:38,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 02:15:38,153 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-09 02:15:38,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-09 02:15:38,183 INFO L124 BoogieDeclarations]: Specification and implementation of procedure foo given in one single declaration [2022-02-09 02:15:38,183 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2022-02-09 02:15:38,183 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2022-02-09 02:15:38,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-09 02:15:38,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-09 02:15:38,184 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-09 02:15:38,217 INFO L234 CfgBuilder]: Building ICFG [2022-02-09 02:15:38,218 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-09 02:15:38,292 INFO L275 CfgBuilder]: Performing block encoding [2022-02-09 02:15:38,298 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-09 02:15:38,298 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-09 02:15:38,300 INFO L202 PluginConnector]: Adding new model fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.02 02:15:38 BoogieIcfgContainer [2022-02-09 02:15:38,300 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-09 02:15:38,302 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-09 02:15:38,302 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-09 02:15:38,305 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-09 02:15:38,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 02:15:38" (1/2) ... [2022-02-09 02:15:38,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a8fffc0 and model type fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.02 02:15:38, skipping insertion in model container [2022-02-09 02:15:38,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.02 02:15:38" (2/2) ... [2022-02-09 02:15:38,309 INFO L111 eAbstractionObserver]: Analyzing ICFG fork_unchanged_local_variables2.bpl [2022-02-09 02:15:38,320 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-09 02:15:38,320 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-09 02:15:38,320 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-09 02:15:38,320 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-09 02:15:38,341 WARN L322 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-02-09 02:15:38,341 WARN L322 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-02-09 02:15:38,342 WARN L322 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-02-09 02:15:38,342 WARN L322 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-02-09 02:15:38,353 WARN L322 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-02-09 02:15:38,354 WARN L322 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-02-09 02:15:38,356 INFO L148 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-02-09 02:15:38,393 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-09 02:15:38,400 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-09 02:15:38,400 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-02-09 02:15:38,407 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 18 places, 16 transitions, 40 flow [2022-02-09 02:15:38,418 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:15:38,420 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:15:38,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-02-09 02:15:38,424 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:15:38,424 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-09 02:15:38,425 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION] === [2022-02-09 02:15:38,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:15:38,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1810014354, now seen corresponding path program 1 times [2022-02-09 02:15:38,435 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:15:38,435 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576478627] [2022-02-09 02:15:38,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:15:38,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:15:38,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:15:38,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:15:38,579 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:15:38,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576478627] [2022-02-09 02:15:38,580 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576478627] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-09 02:15:38,580 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-09 02:15:38,581 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-09 02:15:38,582 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077655310] [2022-02-09 02:15:38,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-09 02:15:38,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-09 02:15:38,586 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:15:38,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-09 02:15:38,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-09 02:15:38,622 INFO L87 Difference]: Start difference. First operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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) [2022-02-09 02:15:38,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:15:38,665 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2022-02-09 02:15:38,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-09 02:15:38,681 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 [2022-02-09 02:15:38,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:15:38,685 INFO L225 Difference]: With dead ends: 24 [2022-02-09 02:15:38,685 INFO L226 Difference]: Without dead ends: 24 [2022-02-09 02:15:38,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-09 02:15:38,689 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-09 02:15:38,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 14 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-09 02:15:38,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-02-09 02:15:38,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-02-09 02:15:38,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 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) [2022-02-09 02:15:38,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-02-09 02:15:38,731 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 10 [2022-02-09 02:15:38,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:15:38,731 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-02-09 02:15:38,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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) [2022-02-09 02:15:38,732 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-02-09 02:15:38,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-09 02:15:38,732 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:15:38,732 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-02-09 02:15:38,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-09 02:15:38,733 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION] === [2022-02-09 02:15:38,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:15:38,733 INFO L85 PathProgramCache]: Analyzing trace with hash -2012947041, now seen corresponding path program 1 times [2022-02-09 02:15:38,733 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:15:38,734 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470502350] [2022-02-09 02:15:38,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:15:38,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:15:38,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-09 02:15:38,746 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-09 02:15:38,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-09 02:15:38,766 INFO L138 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-02-09 02:15:38,766 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-09 02:15:38,767 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (1 of 2 remaining) [2022-02-09 02:15:38,768 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION (0 of 2 remaining) [2022-02-09 02:15:38,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-09 02:15:38,800 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2022-02-09 02:15:38,803 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-09 02:15:38,803 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-09 02:15:38,834 INFO L202 PluginConnector]: Adding new model fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.02 02:15:38 BasicIcfg [2022-02-09 02:15:38,834 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-09 02:15:38,835 INFO L158 Benchmark]: Toolchain (without parser) took 745.44ms. Allocated memory was 178.3MB in the beginning and 234.9MB in the end (delta: 56.6MB). Free memory was 135.8MB in the beginning and 208.5MB in the end (delta: -72.7MB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-09 02:15:38,836 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.12ms. Allocated memory is still 178.3MB. Free memory is still 136.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-09 02:15:38,836 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.72ms. Allocated memory is still 178.3MB. Free memory was 135.7MB in the beginning and 134.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-09 02:15:38,838 INFO L158 Benchmark]: Boogie Preprocessor took 13.36ms. Allocated memory is still 178.3MB. Free memory was 134.2MB in the beginning and 133.3MB in the end (delta: 916.8kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-09 02:15:38,839 INFO L158 Benchmark]: RCFGBuilder took 172.25ms. Allocated memory is still 178.3MB. Free memory was 133.2MB in the beginning and 125.2MB in the end (delta: 8.0MB). Peak memory consumption was 7.3MB. Max. memory is 8.0GB. [2022-02-09 02:15:38,841 INFO L158 Benchmark]: TraceAbstraction took 532.36ms. Allocated memory was 178.3MB in the beginning and 234.9MB in the end (delta: 56.6MB). Free memory was 124.7MB in the beginning and 208.5MB in the end (delta: -83.8MB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-09 02:15:38,844 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 0.12ms. Allocated memory is still 178.3MB. Free memory is still 136.7MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 21.72ms. Allocated memory is still 178.3MB. Free memory was 135.7MB in the beginning and 134.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 13.36ms. Allocated memory is still 178.3MB. Free memory was 134.2MB in the beginning and 133.3MB in the end (delta: 916.8kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 172.25ms. Allocated memory is still 178.3MB. Free memory was 133.2MB in the beginning and 125.2MB in the end (delta: 8.0MB). Peak memory consumption was 7.3MB. Max. memory is 8.0GB. * TraceAbstraction took 532.36ms. Allocated memory was 178.3MB in the beginning and 234.9MB in the end (delta: 56.6MB). Free memory was 124.7MB in the beginning and 208.5MB in the end (delta: -83.8MB). 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: 25]: assertion can be violated assertion can be violated We found a FailurePath: [L17] 0 res := 0; VAL [res=0] [L18] 0 x := 0; VAL [res=0, x=0] [L20] COND TRUE 0 x < 3 VAL [res=0, x=0] [L21] FORK 0 fork x foo(); VAL [res=0, x=0] [L22] 0 resOld := res; VAL [res=0, resOld=0, x=0] [L35] 1 res := y; VAL [res=0, res=2, resOld=0, x=0, y=2] [L23] JOIN 1 join x assign res; VAL [res=2, res=2, resOld=0, x=0, y=2] [L24] COND FALSE 0 !(x > 0) VAL [res=2, res=2, resOld=0, x=0, y=2] [L27] 0 x := x + 1; VAL [res=2, res=2, resOld=0, x=1, y=2] [L20] COND TRUE 0 x < 3 VAL [res=2, res=2, resOld=0, x=1, y=2] [L21] FORK 0 fork x foo(); VAL [res=2, resOld=0, x=1] [L22] 0 resOld := res; VAL [res=2, resOld=2, x=1] [L35] 1 res := y; VAL [res=2, res=3, resOld=2, x=1, y=3] [L23] JOIN 1 join x assign res; VAL [res=3, res=3, resOld=2, x=1, y=3] [L24] COND TRUE 0 x > 0 VAL [res=3, res=3, resOld=2, x=1, y=3] [L25] 0 assert resOld == res; VAL [res=3, res=3, resOld=2, x=1, y=3] - UnprovableResult [Line: 21]: 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 3 procedures, 19 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1 mSDsluCounter, 14 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 6 mSDsCounter, 1 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 10 IncrementalHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1 mSolverCounterUnsat, 8 mSDtfsCounter, 10 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=1, 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, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 23 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! [2022-02-09 02:15:38,870 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...