/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/example_interleaving_simple.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-44898dd [2022-02-09 02:15:28,637 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-09 02:15:28,670 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-09 02:15:28,689 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-09 02:15:28,720 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 02:15:28,742 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-09 02:15:28,743 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-09 02:15:28,743 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-09 02:15:28,743 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-09 02:15:28,744 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-09 02:15:28,744 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-09 02:15:28,744 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-09 02:15:28,744 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-09 02:15:28,744 INFO L138 SettingsManager]: * Use SBE=true [2022-02-09 02:15:28,745 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-09 02:15:28,745 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-09 02:15:28,745 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-09 02:15:28,745 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-09 02:15:28,745 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-09 02:15:28,745 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-09 02:15:28,745 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-09 02:15:28,745 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-09 02:15:28,746 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-09 02:15:28,746 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-09 02:15:28,746 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-09 02:15:28,746 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-09 02:15:28,746 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-09 02:15:28,746 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-09 02:15:28,746 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-09 02:15:28,746 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-09 02:15:28,747 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-09 02:15:28,747 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-09 02:15:28,751 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-09 02:15:28,752 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-09 02:15:28,752 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-09 02:15:28,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-09 02:15:28,752 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-09 02:15:28,752 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-09 02:15:28,753 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-09 02:15:28,974 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-09 02:15:29,003 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-09 02:15:29,007 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-09 02:15:29,008 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-09 02:15:29,010 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-09 02:15:29,011 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/example_interleaving_simple.bpl [2022-02-09 02:15:29,012 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/example_interleaving_simple.bpl' [2022-02-09 02:15:29,035 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-09 02:15:29,037 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-09 02:15:29,038 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-09 02:15:29,038 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-09 02:15:29,039 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-09 02:15:29,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "example_interleaving_simple.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 02:15:29" (1/1) ... [2022-02-09 02:15:29,060 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "example_interleaving_simple.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 02:15:29" (1/1) ... [2022-02-09 02:15:29,067 INFO L137 Inliner]: procedures = 2, calls = 1, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-09 02:15:29,069 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-09 02:15:29,070 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-09 02:15:29,070 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-09 02:15:29,071 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-09 02:15:29,077 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "example_interleaving_simple.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 02:15:29" (1/1) ... [2022-02-09 02:15:29,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "example_interleaving_simple.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 02:15:29" (1/1) ... [2022-02-09 02:15:29,078 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "example_interleaving_simple.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 02:15:29" (1/1) ... [2022-02-09 02:15:29,078 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "example_interleaving_simple.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 02:15:29" (1/1) ... [2022-02-09 02:15:29,080 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "example_interleaving_simple.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 02:15:29" (1/1) ... [2022-02-09 02:15:29,081 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "example_interleaving_simple.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 02:15:29" (1/1) ... [2022-02-09 02:15:29,081 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "example_interleaving_simple.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 02:15:29" (1/1) ... [2022-02-09 02:15:29,082 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-09 02:15:29,083 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-09 02:15:29,083 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-09 02:15:29,083 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-09 02:15:29,084 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example_interleaving_simple.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 02:15:29" (1/1) ... [2022-02-09 02:15:29,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-09 02:15:29,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 02:15:29,150 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 02:15:29,185 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 02:15:29,213 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-09 02:15:29,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-09 02:15:29,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-09 02:15:29,214 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_x given in one single declaration [2022-02-09 02:15:29,214 INFO L130 BoogieDeclarations]: Found specification of procedure set_x [2022-02-09 02:15:29,214 INFO L138 BoogieDeclarations]: Found implementation of procedure set_x [2022-02-09 02:15:29,215 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 02:15:29,256 INFO L234 CfgBuilder]: Building ICFG [2022-02-09 02:15:29,257 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-09 02:15:29,293 INFO L275 CfgBuilder]: Performing block encoding [2022-02-09 02:15:29,298 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-09 02:15:29,298 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-09 02:15:29,299 INFO L202 PluginConnector]: Adding new model example_interleaving_simple.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.02 02:15:29 BoogieIcfgContainer [2022-02-09 02:15:29,300 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-09 02:15:29,301 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-09 02:15:29,301 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-09 02:15:29,303 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-09 02:15:29,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_interleaving_simple.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 02:15:29" (1/2) ... [2022-02-09 02:15:29,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6391c7f6 and model type example_interleaving_simple.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.02 02:15:29, skipping insertion in model container [2022-02-09 02:15:29,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_interleaving_simple.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.02 02:15:29" (2/2) ... [2022-02-09 02:15:29,305 INFO L111 eAbstractionObserver]: Analyzing ICFG example_interleaving_simple.bpl [2022-02-09 02:15:29,308 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-09 02:15:29,308 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-09 02:15:29,309 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-09 02:15:29,309 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-09 02:15:29,323 INFO L148 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-02-09 02:15:29,352 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-09 02:15:29,358 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 02:15:29,358 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-02-09 02:15:29,364 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 13 places, 9 transitions, 26 flow [2022-02-09 02:15:29,373 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 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 02:15:29,375 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 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 02:15:29,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-02-09 02:15:29,379 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:15:29,379 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-02-09 02:15:29,380 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION] === [2022-02-09 02:15:29,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:15:29,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1446749614, now seen corresponding path program 1 times [2022-02-09 02:15:29,389 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:15:29,390 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765328565] [2022-02-09 02:15:29,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:15:29,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:15:29,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:15:29,529 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 02:15:29,530 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:15:29,531 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765328565] [2022-02-09 02:15:29,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765328565] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-09 02:15:29,531 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-09 02:15:29,532 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-09 02:15:29,533 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28644507] [2022-02-09 02:15:29,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-09 02:15:29,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-09 02:15:29,537 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:15:29,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-09 02:15:29,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-09 02:15:29,557 INFO L87 Difference]: Start difference. First operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 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) Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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 02:15:29,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:15:29,612 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2022-02-09 02:15:29,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-09 02:15:29,613 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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 6 [2022-02-09 02:15:29,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:15:29,618 INFO L225 Difference]: With dead ends: 12 [2022-02-09 02:15:29,618 INFO L226 Difference]: Without dead ends: 7 [2022-02-09 02:15:29,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-09 02:15:29,622 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 7 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 [2022-02-09 02:15:29,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 7 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-09 02:15:29,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2022-02-09 02:15:29,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2022-02-09 02:15:29,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.0) internal successors, (6), 6 states have internal predecessors, (6), 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 02:15:29,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2022-02-09 02:15:29,682 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2022-02-09 02:15:29,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:15:29,683 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2022-02-09 02:15:29,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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 02:15:29,683 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2022-02-09 02:15:29,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-02-09 02:15:29,683 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:15:29,683 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-02-09 02:15:29,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-09 02:15:29,684 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION] === [2022-02-09 02:15:29,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:15:29,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1440262864, now seen corresponding path program 2 times [2022-02-09 02:15:29,685 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:15:29,685 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995623126] [2022-02-09 02:15:29,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:15:29,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:15:29,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:15:29,744 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 02:15:29,745 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:15:29,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995623126] [2022-02-09 02:15:29,745 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995623126] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-09 02:15:29,745 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-09 02:15:29,745 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-09 02:15:29,745 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057834134] [2022-02-09 02:15:29,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-09 02:15:29,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-09 02:15:29,746 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:15:29,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-09 02:15:29,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-09 02:15:29,747 INFO L87 Difference]: Start difference. First operand 7 states and 6 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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 02:15:29,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:15:29,768 INFO L93 Difference]: Finished difference Result 6 states and 5 transitions. [2022-02-09 02:15:29,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-09 02:15:29,778 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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 6 [2022-02-09 02:15:29,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:15:29,778 INFO L225 Difference]: With dead ends: 6 [2022-02-09 02:15:29,778 INFO L226 Difference]: Without dead ends: 0 [2022-02-09 02:15:29,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-09 02:15:29,780 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-09 02:15:29,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 3 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-09 02:15:29,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-09 02:15:29,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-09 02:15:29,782 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) [2022-02-09 02:15:29,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-09 02:15:29,783 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 6 [2022-02-09 02:15:29,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:15:29,783 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-09 02:15:29,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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 02:15:29,783 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-09 02:15:29,784 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-09 02:15:29,797 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (1 of 2 remaining) [2022-02-09 02:15:29,798 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (0 of 2 remaining) [2022-02-09 02:15:29,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-09 02:15:29,801 INFO L732 BasicCegarLoop]: Path program histogram: [2] [2022-02-09 02:15:29,803 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-09 02:15:29,803 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-09 02:15:29,807 INFO L202 PluginConnector]: Adding new model example_interleaving_simple.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.02 02:15:29 BasicIcfg [2022-02-09 02:15:29,807 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-09 02:15:29,808 INFO L158 Benchmark]: Toolchain (without parser) took 770.48ms. Allocated memory is still 174.1MB. Free memory was 138.0MB in the beginning and 151.2MB in the end (delta: -13.2MB). Peak memory consumption was 9.3MB. Max. memory is 8.0GB. [2022-02-09 02:15:29,808 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.63ms. Allocated memory is still 174.1MB. Free memory was 139.0MB in the beginning and 138.9MB in the end (delta: 122.4kB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-09 02:15:29,809 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.00ms. Allocated memory is still 174.1MB. Free memory was 138.0MB in the beginning and 136.4MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-09 02:15:29,809 INFO L158 Benchmark]: Boogie Preprocessor took 11.54ms. Allocated memory is still 174.1MB. Free memory was 136.4MB in the beginning and 135.5MB in the end (delta: 809.6kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-09 02:15:29,810 INFO L158 Benchmark]: RCFGBuilder took 217.06ms. Allocated memory is still 174.1MB. Free memory was 135.4MB in the beginning and 128.2MB in the end (delta: 7.2MB). Peak memory consumption was 7.3MB. Max. memory is 8.0GB. [2022-02-09 02:15:29,811 INFO L158 Benchmark]: TraceAbstraction took 505.88ms. Allocated memory is still 174.1MB. Free memory was 127.7MB in the beginning and 151.2MB in the end (delta: -23.4MB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-09 02:15:29,836 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 0.63ms. Allocated memory is still 174.1MB. Free memory was 139.0MB in the beginning and 138.9MB in the end (delta: 122.4kB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 31.00ms. Allocated memory is still 174.1MB. Free memory was 138.0MB in the beginning and 136.4MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 11.54ms. Allocated memory is still 174.1MB. Free memory was 136.4MB in the beginning and 135.5MB in the end (delta: 809.6kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 217.06ms. Allocated memory is still 174.1MB. Free memory was 135.4MB in the beginning and 128.2MB in the end (delta: 7.2MB). Peak memory consumption was 7.3MB. Max. memory is 8.0GB. * TraceAbstraction took 505.88ms. Allocated memory is still 174.1MB. Free memory was 127.7MB in the beginning and 151.2MB in the end (delta: -23.4MB). 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 - PositiveResult [Line: 16]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 14 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 8 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8 mSDsluCounter, 10 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 7 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 14 IncrementalHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 8 mSDtfsCounter, 14 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred in iteration=0, InterpolantAutomatonStates: 8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 68 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-02-09 02:15:29,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...