/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_join_NotMod.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 20:41:14,078 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 20:41:14,079 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 20:41:14,101 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 20:41:14,147 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 [2021-03-10 20:41:14,172 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 20:41:14,172 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 20:41:14,172 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 20:41:14,172 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 20:41:14,174 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 20:41:14,174 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 20:41:14,174 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 20:41:14,174 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 20:41:14,175 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 20:41:14,175 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 20:41:14,175 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 20:41:14,175 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 20:41:14,175 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 20:41:14,175 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 20:41:14,175 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 20:41:14,176 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 20:41:14,176 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 20:41:14,176 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 20:41:14,176 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 20:41:14,176 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 20:41:14,176 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 20:41:14,176 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 20:41:14,176 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 20:41:14,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 20:41:14,176 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 20:41:14,176 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 20:41:14,177 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 20:41:14,177 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 20:41:14,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 20:41:14,177 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 20:41:14,177 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 20:41:14,177 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 20:41:14,384 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 20:41:14,401 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 20:41:14,402 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 20:41:14,403 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 20:41:14,408 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 20:41:14,408 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/fork_join_NotMod.bpl [2021-03-10 20:41:14,408 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/fork_join_NotMod.bpl' [2021-03-10 20:41:14,432 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 20:41:14,435 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 20:41:14,436 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 20:41:14,436 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 20:41:14,436 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 20:41:14,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "fork_join_NotMod.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:14" (1/1) ... [2021-03-10 20:41:14,450 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "fork_join_NotMod.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:14" (1/1) ... [2021-03-10 20:41:14,454 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 20:41:14,455 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 20:41:14,455 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 20:41:14,455 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 20:41:14,459 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fork_join_NotMod.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:14" (1/1) ... [2021-03-10 20:41:14,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fork_join_NotMod.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:14" (1/1) ... [2021-03-10 20:41:14,460 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fork_join_NotMod.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:14" (1/1) ... [2021-03-10 20:41:14,460 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fork_join_NotMod.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:14" (1/1) ... [2021-03-10 20:41:14,461 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fork_join_NotMod.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:14" (1/1) ... [2021-03-10 20:41:14,461 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fork_join_NotMod.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:14" (1/1) ... [2021-03-10 20:41:14,462 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fork_join_NotMod.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:14" (1/1) ... [2021-03-10 20:41:14,462 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 20:41:14,463 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 20:41:14,463 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 20:41:14,463 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 20:41:14,466 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fork_join_NotMod.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:14" (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 [2021-03-10 20:41:14,516 INFO L130 BoogieDeclarations]: Found specification of procedure increment [2021-03-10 20:41:14,516 INFO L138 BoogieDeclarations]: Found implementation of procedure increment [2021-03-10 20:41:14,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 20:41:14,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 20:41:14,517 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 20:41:14,602 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 20:41:14,602 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-10 20:41:14,603 INFO L202 PluginConnector]: Adding new model fork_join_NotMod.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 08:41:14 BoogieIcfgContainer [2021-03-10 20:41:14,603 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 20:41:14,604 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 20:41:14,604 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 20:41:14,606 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 20:41:14,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_join_NotMod.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:14" (1/2) ... [2021-03-10 20:41:14,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bb15beb and model type fork_join_NotMod.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 08:41:14, skipping insertion in model container [2021-03-10 20:41:14,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_join_NotMod.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 08:41:14" (2/2) ... [2021-03-10 20:41:14,607 INFO L111 eAbstractionObserver]: Analyzing ICFG fork_join_NotMod.bpl [2021-03-10 20:41:14,611 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 20:41:14,611 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 20:41:14,613 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2021-03-10 20:41:14,613 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 20:41:14,626 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:41:14,626 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:41:14,626 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:41:14,626 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:41:14,628 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:41:14,635 INFO L149 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2021-03-10 20:41:14,645 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-03-10 20:41:14,656 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 20:41:14,656 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 20:41:14,656 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 20:41:14,657 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 20:41:14,657 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 20:41:14,657 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 20:41:14,657 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 20:41:14,657 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 20:41:14,662 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 40 flow [2021-03-10 20:41:14,668 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 24 states, 19 states have (on average 1.631578947368421) internal successors, (31), 23 states have internal predecessors, (31), 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) [2021-03-10 20:41:14,669 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 19 states have (on average 1.631578947368421) internal successors, (31), 23 states have internal predecessors, (31), 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) [2021-03-10 20:41:14,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-03-10 20:41:14,673 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:41:14,674 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-03-10 20:41:14,674 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:41:14,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:41:14,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1538645, now seen corresponding path program 1 times [2021-03-10 20:41:14,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:41:14,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626923441] [2021-03-10 20:41:14,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:41:14,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:41:14,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:41:14,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626923441] [2021-03-10 20:41:14,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:41:14,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-10 20:41:14,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848480085] [2021-03-10 20:41:14,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 20:41:14,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:41:14,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 20:41:14,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 20:41:14,798 INFO L87 Difference]: Start difference. First operand has 24 states, 19 states have (on average 1.631578947368421) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:41:14,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:41:14,828 INFO L93 Difference]: Finished difference Result 20 states and 25 transitions. [2021-03-10 20:41:14,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 20:41:14,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-03-10 20:41:14,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:41:14,848 INFO L225 Difference]: With dead ends: 20 [2021-03-10 20:41:14,848 INFO L226 Difference]: Without dead ends: 18 [2021-03-10 20:41:14,849 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 20:41:14,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-03-10 20:41:14,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-03-10 20:41:14,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 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) [2021-03-10 20:41:14,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2021-03-10 20:41:14,879 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 4 [2021-03-10 20:41:14,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:41:14,879 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2021-03-10 20:41:14,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:41:14,879 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2021-03-10 20:41:14,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-03-10 20:41:14,880 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:41:14,880 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-03-10 20:41:14,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 20:41:14,880 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:41:14,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:41:14,881 INFO L82 PathProgramCache]: Analyzing trace with hash 47698052, now seen corresponding path program 1 times [2021-03-10 20:41:14,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:41:14,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742275250] [2021-03-10 20:41:14,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:41:14,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:41:14,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:41:14,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742275250] [2021-03-10 20:41:14,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:41:14,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-10 20:41:14,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548117757] [2021-03-10 20:41:14,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 20:41:14,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:41:14,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 20:41:14,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 20:41:14,908 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2021-03-10 20:41:14,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:41:14,913 INFO L93 Difference]: Finished difference Result 14 states and 17 transitions. [2021-03-10 20:41:14,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 20:41:14,914 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2021-03-10 20:41:14,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:41:14,914 INFO L225 Difference]: With dead ends: 14 [2021-03-10 20:41:14,914 INFO L226 Difference]: Without dead ends: 0 [2021-03-10 20:41:14,914 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 20:41:14,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-03-10 20:41:14,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-03-10 20:41:14,915 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) [2021-03-10 20:41:14,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-03-10 20:41:14,915 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 5 [2021-03-10 20:41:14,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:41:14,915 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-03-10 20:41:14,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2021-03-10 20:41:14,915 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-03-10 20:41:14,915 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-03-10 20:41:14,915 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 20:41:14,918 INFO L202 PluginConnector]: Adding new model fork_join_NotMod.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.03 08:41:14 BasicIcfg [2021-03-10 20:41:14,918 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-10 20:41:14,919 INFO L168 Benchmark]: Toolchain (without parser) took 485.73 ms. Allocated memory is still 341.8 MB. Free memory was 322.4 MB in the beginning and 313.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 10.6 MB. Max. memory is 16.0 GB. [2021-03-10 20:41:14,920 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 341.8 MB. Free memory was 323.4 MB in the beginning and 323.3 MB in the end (delta: 134.0 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 20:41:14,920 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.96 ms. Allocated memory is still 341.8 MB. Free memory was 321.9 MB in the beginning and 320.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 20:41:14,921 INFO L168 Benchmark]: Boogie Preprocessor took 7.75 ms. Allocated memory is still 341.8 MB. Free memory was 320.4 MB in the beginning and 319.5 MB in the end (delta: 951.1 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 20:41:14,921 INFO L168 Benchmark]: RCFGBuilder took 140.47 ms. Allocated memory is still 341.8 MB. Free memory was 319.5 MB in the beginning and 311.0 MB in the end (delta: 8.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-03-10 20:41:14,922 INFO L168 Benchmark]: TraceAbstraction took 313.98 ms. Allocated memory is still 341.8 MB. Free memory was 310.5 MB in the beginning and 313.1 MB in the end (delta: -2.6 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 20:41:14,924 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 0.11 ms. Allocated memory is still 341.8 MB. Free memory was 323.4 MB in the beginning and 323.3 MB in the end (delta: 134.0 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 17.96 ms. Allocated memory is still 341.8 MB. Free memory was 321.9 MB in the beginning and 320.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 7.75 ms. Allocated memory is still 341.8 MB. Free memory was 320.4 MB in the beginning and 319.5 MB in the end (delta: 951.1 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 140.47 ms. Allocated memory is still 341.8 MB. Free memory was 319.5 MB in the beginning and 311.0 MB in the end (delta: 8.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 313.98 ms. Allocated memory is still 341.8 MB. Free memory was 310.5 MB in the beginning and 313.1 MB in the end (delta: -2.6 MB). There was no memory consumed. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 28]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 27]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 24]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 25]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 4 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 17 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 260.6ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 5.1ms, AutomataDifference: 66.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 16 SDtfs, 15 SDslu, 1 SDs, 0 SdLazy, 6 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 21.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=0, InterpolantAutomatonStates: 6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 22.7ms AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 3.7ms SsaConstructionTime, 10.8ms SatisfiabilityAnalysisTime, 68.8ms InterpolantComputationTime, 9 NumberOfCodeBlocks, 9 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 7 ConstructedInterpolants, 0 QuantifiedInterpolants, 19 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 RESULT: Ultimate proved your program to be correct! Received shutdown request...