/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-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/JoinTheForkingThread.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 13:12:37,450 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 13:12:37,452 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 13:12:37,488 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 13:12:37,793 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-Separate.epf [2021-06-05 13:12:37,829 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 13:12:37,829 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 13:12:37,829 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 13:12:37,830 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 13:12:37,832 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 13:12:37,832 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 13:12:37,832 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 13:12:37,832 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 13:12:37,833 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 13:12:37,833 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 13:12:37,833 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 13:12:37,834 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 13:12:37,834 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 13:12:37,834 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 13:12:37,834 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 13:12:37,834 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 13:12:37,834 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 13:12:37,834 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 13:12:37,834 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 13:12:37,834 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 13:12:37,835 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 13:12:37,835 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 13:12:37,835 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 13:12:37,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 13:12:37,835 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 13:12:37,835 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 13:12:37,835 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 13:12:37,835 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 13:12:37,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 13:12:37,836 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 13:12:37,836 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 13:12:37,836 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 13:12:37,836 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 13:12:38,184 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 13:12:38,205 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 13:12:38,207 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 13:12:38,208 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 13:12:38,209 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 13:12:38,210 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/JoinTheForkingThread.bpl [2021-06-05 13:12:38,210 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/JoinTheForkingThread.bpl' [2021-06-05 13:12:38,240 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 13:12:38,241 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 13:12:38,242 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 13:12:38,242 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 13:12:38,242 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 13:12:38,255 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:12:38" (1/1) ... [2021-06-05 13:12:38,260 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:12:38" (1/1) ... [2021-06-05 13:12:38,267 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 13:12:38,269 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 13:12:38,270 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 13:12:38,270 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 13:12:38,276 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:12:38" (1/1) ... [2021-06-05 13:12:38,276 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:12:38" (1/1) ... [2021-06-05 13:12:38,276 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:12:38" (1/1) ... [2021-06-05 13:12:38,277 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:12:38" (1/1) ... [2021-06-05 13:12:38,278 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:12:38" (1/1) ... [2021-06-05 13:12:38,279 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:12:38" (1/1) ... [2021-06-05 13:12:38,279 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:12:38" (1/1) ... [2021-06-05 13:12:38,280 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 13:12:38,281 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 13:12:38,281 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 13:12:38,281 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 13:12:38,282 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:12:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 13:12:38,337 INFO L124 BoogieDeclarations]: Specification and implementation of procedure bar given in one single declaration [2021-06-05 13:12:38,338 INFO L130 BoogieDeclarations]: Found specification of procedure bar [2021-06-05 13:12:38,338 INFO L138 BoogieDeclarations]: Found implementation of procedure bar [2021-06-05 13:12:38,338 INFO L124 BoogieDeclarations]: Specification and implementation of procedure foo given in one single declaration [2021-06-05 13:12:38,338 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-06-05 13:12:38,338 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-06-05 13:12:38,338 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 13:12:38,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 13:12:38,339 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 13:12:38,339 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 13:12:38,479 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 13:12:38,479 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 13:12:38,480 INFO L202 PluginConnector]: Adding new model JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 01:12:38 BoogieIcfgContainer [2021-06-05 13:12:38,480 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 13:12:38,483 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 13:12:38,483 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 13:12:38,486 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 13:12:38,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:12:38" (1/2) ... [2021-06-05 13:12:38,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41cde1b8 and model type JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 01:12:38, skipping insertion in model container [2021-06-05 13:12:38,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 01:12:38" (2/2) ... [2021-06-05 13:12:38,489 INFO L111 eAbstractionObserver]: Analyzing ICFG JoinTheForkingThread.bpl [2021-06-05 13:12:38,495 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 13:12:38,496 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 13:12:38,496 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-06-05 13:12:38,497 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 13:12:38,515 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:12:38,516 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:12:38,517 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork1_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:12:38,517 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork1_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:12:38,519 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_localVar not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:12:38,520 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_nondet not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:12:38,520 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:12:38,524 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork1_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:12:38,526 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_localVar not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:12:38,526 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_nondet not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:12:38,527 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:12:38,543 INFO L149 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2021-06-05 13:12:38,562 INFO L255 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-06-05 13:12:38,580 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 13:12:38,580 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 13:12:38,580 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 13:12:38,580 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 13:12:38,581 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 13:12:38,581 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 13:12:38,581 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 13:12:38,581 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 13:12:38,606 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 29 places, 25 transitions, 78 flow [2021-06-05 13:12:38,615 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 28 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 27 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:12:38,617 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 27 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:12:38,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-06-05 13:12:38,622 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:12:38,623 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:12:38,623 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooThread1of1ForFork1Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, barErr0ASSERT_VIOLATIONASSERT, fooErr1INUSE_VIOLATION, barErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:12:38,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:12:38,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1250792783, now seen corresponding path program 1 times [2021-06-05 13:12:38,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:12:38,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084067711] [2021-06-05 13:12:38,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:12:38,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:12:38,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:12:38,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:12:38,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084067711] [2021-06-05 13:12:38,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084067711] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:12:38,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:12:38,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 13:12:38,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497616417] [2021-06-05 13:12:38,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 13:12:38,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:12:38,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 13:12:38,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:12:38,836 INFO L87 Difference]: Start difference. First operand has 28 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 27 states have internal predecessors, (35), 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 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:12:38,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:12:38,852 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2021-06-05 13:12:38,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 13:12:38,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2021-06-05 13:12:38,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:12:38,859 INFO L225 Difference]: With dead ends: 14 [2021-06-05 13:12:38,860 INFO L226 Difference]: Without dead ends: 14 [2021-06-05 13:12:38,861 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:12:38,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-06-05 13:12:38,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-06-05 13:12:38,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:12:38,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-06-05 13:12:38,888 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2021-06-05 13:12:38,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:12:38,889 INFO L482 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-06-05 13:12:38,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:12:38,890 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-06-05 13:12:38,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 13:12:38,891 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:12:38,891 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:12:38,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 13:12:38,891 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooThread1of1ForFork1Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, barErr0ASSERT_VIOLATIONASSERT, fooErr1INUSE_VIOLATION, barErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:12:38,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:12:38,901 INFO L82 PathProgramCache]: Analyzing trace with hash -292609395, now seen corresponding path program 1 times [2021-06-05 13:12:38,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:12:38,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604619271] [2021-06-05 13:12:38,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:12:38,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 13:12:38,921 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 13:12:38,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 13:12:38,939 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 13:12:38,959 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-05 13:12:38,959 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-06-05 13:12:38,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 13:12:38,963 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 13:12:38,975 INFO L202 PluginConnector]: Adding new model JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 01:12:38 BasicIcfg [2021-06-05 13:12:38,975 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 13:12:38,977 INFO L168 Benchmark]: Toolchain (without parser) took 734.57 ms. Allocated memory is still 339.7 MB. Free memory was 319.7 MB in the beginning and 308.3 MB in the end (delta: 11.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 16.0 GB. [2021-06-05 13:12:38,977 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 339.7 MB. Free memory is still 320.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 13:12:38,979 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.87 ms. Allocated memory is still 339.7 MB. Free memory was 319.5 MB in the beginning and 318.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 13:12:38,980 INFO L168 Benchmark]: Boogie Preprocessor took 11.28 ms. Allocated memory is still 339.7 MB. Free memory was 318.0 MB in the beginning and 317.2 MB in the end (delta: 876.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 13:12:38,981 INFO L168 Benchmark]: RCFGBuilder took 199.27 ms. Allocated memory is still 339.7 MB. Free memory was 317.2 MB in the beginning and 308.1 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-06-05 13:12:38,983 INFO L168 Benchmark]: TraceAbstraction took 492.68 ms. Allocated memory is still 339.7 MB. Free memory was 307.7 MB in the beginning and 308.3 MB in the end (delta: -601.9 kB). Peak memory consumption was 694.6 kB. Max. memory is 16.0 GB. [2021-06-05 13:12:38,989 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 0.13 ms. Allocated memory is still 339.7 MB. Free memory is still 320.6 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.87 ms. Allocated memory is still 339.7 MB. Free memory was 319.5 MB in the beginning and 318.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.28 ms. Allocated memory is still 339.7 MB. Free memory was 318.0 MB in the beginning and 317.2 MB in the end (delta: 876.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 199.27 ms. Allocated memory is still 339.7 MB. Free memory was 317.2 MB in the beginning and 308.1 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 492.68 ms. Allocated memory is still 339.7 MB. Free memory was 307.7 MB in the beginning and 308.3 MB in the end (delta: -601.9 kB). Peak memory consumption was 694.6 kB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 45]: assertion can be violated assertion can be violated We found a FailurePath: [L17] 0 x := 0; VAL [x=0] [L18] 0 g := 0; VAL [g=0, x=0] [L20] FORK 0 fork 1 foo(x); VAL [g=0, n=0, x=0] [L29] FORK 1 fork 2 bar(n); VAL [g=0, n=0, n=0, x=0] [L40] 2 res := 23; VAL [g=0, n=0, n=0, res=23, x=0] [L30] 1 g := g + 1; VAL [g=1, n=0, n=0, res=23, x=0] [L31] 1 res := 23; VAL [g=1, n=0, n=0, res=23, res=23, x=0] [L44] JOIN 1 join nondet assign localVar; VAL [g=1, localVar=23, n=0, n=0, nondet=1, res=23, res=23, x=0] [L45] 2 assert false; VAL [g=1, localVar=23, n=0, n=0, nondet=1, res=23, res=23, x=0] - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 33 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 383.1ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 7.4ms, AutomataDifference: 43.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 34.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 9 SDtfs, 3 SDslu, 2 SDs, 0 SdLazy, 1 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 15.7ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 9.0ms SsaConstructionTime, 41.9ms SatisfiabilityAnalysisTime, 67.9ms InterpolantComputationTime, 19 NumberOfCodeBlocks, 19 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 8 ConstructedInterpolants, 0 QuantifiedInterpolants, 18 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! Received shutdown request...