/usr/bin/java -Xmx16000000000 -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-dev-bc79526 [2022-01-18 03:52:41,164 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 03:52:41,166 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 03:52:41,205 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-18 03:52:41,248 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 [2022-01-18 03:52:41,267 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 03:52:41,267 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 03:52:41,268 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 03:52:41,268 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 03:52:41,268 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 03:52:41,268 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 03:52:41,269 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 03:52:41,269 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 03:52:41,269 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 03:52:41,269 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 03:52:41,269 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 03:52:41,269 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 03:52:41,269 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 03:52:41,269 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 03:52:41,269 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 03:52:41,270 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 03:52:41,270 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 03:52:41,270 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 03:52:41,270 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 03:52:41,270 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 03:52:41,270 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 03:52:41,270 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 03:52:41,270 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 03:52:41,270 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 03:52:41,270 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 03:52:41,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 03:52:41,270 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 03:52:41,271 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 03:52:41,271 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 03:52:41,271 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 03:52:41,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 03:52:41,271 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 03:52:41,271 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 03:52:41,271 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 03:52:41,412 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 03:52:41,429 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 03:52:41,430 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 03:52:41,431 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 03:52:41,432 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 03:52:41,433 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/fork_unchanged_local_variables2.bpl [2022-01-18 03:52:41,433 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/fork_unchanged_local_variables2.bpl' [2022-01-18 03:52:41,450 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 03:52:41,451 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 03:52:41,452 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 03:52:41,453 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 03:52:41,453 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 03:52:41,461 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 18.01 03:52:41" (1/1) ... [2022-01-18 03:52:41,465 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 18.01 03:52:41" (1/1) ... [2022-01-18 03:52:41,473 INFO L137 Inliner]: procedures = 2, calls = 1, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 03:52:41,474 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 03:52:41,475 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 03:52:41,475 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 03:52:41,475 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 03:52:41,480 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 18.01 03:52:41" (1/1) ... [2022-01-18 03:52:41,481 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 18.01 03:52:41" (1/1) ... [2022-01-18 03:52:41,481 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 18.01 03:52:41" (1/1) ... [2022-01-18 03:52:41,481 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 18.01 03:52:41" (1/1) ... [2022-01-18 03:52:41,482 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 18.01 03:52:41" (1/1) ... [2022-01-18 03:52:41,484 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 18.01 03:52:41" (1/1) ... [2022-01-18 03:52:41,485 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 18.01 03:52:41" (1/1) ... [2022-01-18 03:52:41,486 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 03:52:41,489 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 03:52:41,489 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 03:52:41,489 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 03:52:41,490 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:52:41" (1/1) ... [2022-01-18 03:52:41,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 03:52:41,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 03:52:41,515 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) [2022-01-18 03:52:41,532 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 [2022-01-18 03:52:41,546 INFO L124 BoogieDeclarations]: Specification and implementation of procedure foo given in one single declaration [2022-01-18 03:52:41,546 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2022-01-18 03:52:41,546 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2022-01-18 03:52:41,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 03:52:41,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 03:52:41,547 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-18 03:52:41,576 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 03:52:41,577 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 03:52:41,630 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 03:52:41,634 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 03:52:41,634 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 03:52:41,636 INFO L202 PluginConnector]: Adding new model fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 03:52:41 BoogieIcfgContainer [2022-01-18 03:52:41,636 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 03:52:41,637 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 03:52:41,637 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 03:52:41,639 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 03:52:41,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:52:41" (1/2) ... [2022-01-18 03:52:41,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ccef1a1 and model type fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 03:52:41, skipping insertion in model container [2022-01-18 03:52:41,640 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 18.01 03:52:41" (2/2) ... [2022-01-18 03:52:41,641 INFO L111 eAbstractionObserver]: Analyzing ICFG fork_unchanged_local_variables2.bpl [2022-01-18 03:52:41,644 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 03:52:41,644 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 03:52:41,644 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 03:52:41,644 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 03:52:41,657 WARN L322 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 03:52:41,658 WARN L322 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 03:52:41,658 WARN L322 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 03:52:41,658 WARN L322 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 03:52:41,660 WARN L322 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 03:52:41,660 WARN L322 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 03:52:41,662 INFO L148 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-01-18 03:52:41,689 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 03:52:41,694 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, 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 [2022-01-18 03:52:41,694 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-01-18 03:52:41,700 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 18 places, 16 transitions, 40 flow [2022-01-18 03:52:41,708 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) [2022-01-18 03:52:41,716 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) [2022-01-18 03:52:41,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-18 03:52:41,720 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 03:52:41,720 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 03:52:41,721 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION] === [2022-01-18 03:52:41,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 03:52:41,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1810014354, now seen corresponding path program 1 times [2022-01-18 03:52:41,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 03:52:41,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418682164] [2022-01-18 03:52:41,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 03:52:41,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 03:52:41,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 03:52:41,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 03:52:41,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 03:52:41,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418682164] [2022-01-18 03:52:41,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418682164] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 03:52:41,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 03:52:41,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 03:52:41,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325297746] [2022-01-18 03:52:41,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 03:52:41,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 03:52:41,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 03:52:41,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 03:52:41,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 03:52:41,880 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) [2022-01-18 03:52:41,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 03:52:41,916 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2022-01-18 03:52:41,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 03:52:41,921 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 [2022-01-18 03:52:41,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 03:52:41,926 INFO L225 Difference]: With dead ends: 24 [2022-01-18 03:52:41,926 INFO L226 Difference]: Without dead ends: 24 [2022-01-18 03:52:41,927 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 [2022-01-18 03:52:41,936 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 [2022-01-18 03:52:41,937 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] [2022-01-18 03:52:41,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-18 03:52:41,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-01-18 03:52:41,956 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) [2022-01-18 03:52:41,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-01-18 03:52:41,957 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 10 [2022-01-18 03:52:41,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 03:52:41,958 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-01-18 03:52:41,958 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) [2022-01-18 03:52:41,958 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-01-18 03:52:41,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 03:52:41,958 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 03:52:41,958 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-01-18 03:52:41,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 03:52:41,959 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION] === [2022-01-18 03:52:41,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 03:52:41,959 INFO L85 PathProgramCache]: Analyzing trace with hash -2012947041, now seen corresponding path program 1 times [2022-01-18 03:52:41,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 03:52:41,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641092343] [2022-01-18 03:52:41,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 03:52:41,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 03:52:41,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-18 03:52:41,981 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-01-18 03:52:41,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-18 03:52:41,995 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-01-18 03:52:41,995 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-01-18 03:52:41,996 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (1 of 2 remaining) [2022-01-18 03:52:41,998 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION (0 of 2 remaining) [2022-01-18 03:52:41,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 03:52:42,016 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2022-01-18 03:52:42,033 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 03:52:42,033 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 03:52:42,056 INFO L202 PluginConnector]: Adding new model fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 03:52:42 BasicIcfg [2022-01-18 03:52:42,056 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 03:52:42,057 INFO L158 Benchmark]: Toolchain (without parser) took 605.27ms. Allocated memory was 436.2MB in the beginning and 524.3MB in the end (delta: 88.1MB). Free memory was 392.8MB in the beginning and 496.0MB in the end (delta: -103.2MB). Peak memory consumption was 8.7MB. Max. memory is 16.0GB. [2022-01-18 03:52:42,057 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.09ms. Allocated memory is still 436.2MB. Free memory is still 393.9MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 03:52:42,057 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.05ms. Allocated memory is still 436.2MB. Free memory was 392.8MB in the beginning and 391.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 03:52:42,058 INFO L158 Benchmark]: Boogie Preprocessor took 11.25ms. Allocated memory is still 436.2MB. Free memory was 391.3MB in the beginning and 390.3MB in the end (delta: 928.5kB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 03:52:42,058 INFO L158 Benchmark]: RCFGBuilder took 147.22ms. Allocated memory is still 436.2MB. Free memory was 390.3MB in the beginning and 382.3MB in the end (delta: 8.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. [2022-01-18 03:52:42,059 INFO L158 Benchmark]: TraceAbstraction took 419.13ms. Allocated memory was 436.2MB in the beginning and 524.3MB in the end (delta: 88.1MB). Free memory was 381.8MB in the beginning and 496.0MB in the end (delta: -114.2MB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 03:52:42,060 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 0.09ms. Allocated memory is still 436.2MB. Free memory is still 393.9MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 22.05ms. Allocated memory is still 436.2MB. Free memory was 392.8MB in the beginning and 391.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 11.25ms. Allocated memory is still 436.2MB. Free memory was 391.3MB in the beginning and 390.3MB in the end (delta: 928.5kB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 147.22ms. Allocated memory is still 436.2MB. Free memory was 390.3MB in the beginning and 382.3MB in the end (delta: 8.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. * TraceAbstraction took 419.13ms. Allocated memory was 436.2MB in the beginning and 524.3MB in the end (delta: 88.1MB). Free memory was 381.8MB in the beginning and 496.0MB in the end (delta: -114.2MB). There was no memory consumed. Max. memory is 16.0GB. * 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=2, res=0, 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: 0.3s, 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! [2022-01-18 03:52:42,097 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...