/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/showcase/PetersonWithBug.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 03:20:54,958 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 03:20:54,960 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 03:20:54,991 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 03:20:55,214 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 [2021-06-05 03:20:55,244 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 03:20:55,245 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 03:20:55,245 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 03:20:55,245 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 03:20:55,247 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 03:20:55,247 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 03:20:55,247 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 03:20:55,247 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 03:20:55,248 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 03:20:55,248 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 03:20:55,248 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 03:20:55,248 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 03:20:55,248 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 03:20:55,248 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 03:20:55,249 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 03:20:55,249 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 03:20:55,249 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 03:20:55,249 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 03:20:55,249 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 03:20:55,249 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 03:20:55,249 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 03:20:55,249 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 03:20:55,249 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 03:20:55,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 03:20:55,249 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 03:20:55,250 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 03:20:55,250 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 03:20:55,250 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 03:20:55,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 03:20:55,250 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 03:20:55,250 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 03:20:55,250 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 03:20:55,460 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 03:20:55,475 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 03:20:55,477 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 03:20:55,477 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 03:20:55,479 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 03:20:55,480 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/showcase/PetersonWithBug.bpl [2021-06-05 03:20:55,480 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/showcase/PetersonWithBug.bpl' [2021-06-05 03:20:55,514 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 03:20:55,515 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 03:20:55,517 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 03:20:55,517 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 03:20:55,517 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 03:20:55,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:20:55" (1/1) ... [2021-06-05 03:20:55,531 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:20:55" (1/1) ... [2021-06-05 03:20:55,536 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 03:20:55,538 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 03:20:55,538 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 03:20:55,539 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 03:20:55,544 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:20:55" (1/1) ... [2021-06-05 03:20:55,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:20:55" (1/1) ... [2021-06-05 03:20:55,544 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:20:55" (1/1) ... [2021-06-05 03:20:55,544 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:20:55" (1/1) ... [2021-06-05 03:20:55,546 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:20:55" (1/1) ... [2021-06-05 03:20:55,548 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:20:55" (1/1) ... [2021-06-05 03:20:55,548 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:20:55" (1/1) ... [2021-06-05 03:20:55,549 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 03:20:55,550 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 03:20:55,550 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 03:20:55,550 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 03:20:55,552 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:20:55" (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 03:20:55,604 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Process0 given in one single declaration [2021-06-05 03:20:55,604 INFO L130 BoogieDeclarations]: Found specification of procedure Process0 [2021-06-05 03:20:55,604 INFO L138 BoogieDeclarations]: Found implementation of procedure Process0 [2021-06-05 03:20:55,604 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Process1 given in one single declaration [2021-06-05 03:20:55,604 INFO L130 BoogieDeclarations]: Found specification of procedure Process1 [2021-06-05 03:20:55,604 INFO L138 BoogieDeclarations]: Found implementation of procedure Process1 [2021-06-05 03:20:55,604 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 03:20:55,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 03:20:55,605 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 03:20:55,605 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 03:20:55,702 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 03:20:55,703 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-05 03:20:55,703 INFO L202 PluginConnector]: Adding new model PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:20:55 BoogieIcfgContainer [2021-06-05 03:20:55,704 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 03:20:55,705 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 03:20:55,705 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 03:20:55,707 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 03:20:55,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:20:55" (1/2) ... [2021-06-05 03:20:55,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13eb2921 and model type PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 03:20:55, skipping insertion in model container [2021-06-05 03:20:55,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:20:55" (2/2) ... [2021-06-05 03:20:55,708 INFO L111 eAbstractionObserver]: Analyzing ICFG PetersonWithBug.bpl [2021-06-05 03:20:55,712 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 03:20:55,712 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 03:20:55,712 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-06-05 03:20:55,713 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 03:20:55,732 WARN L313 ript$VariableManager]: TermVariabe Process0Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:20:55,733 WARN L313 ript$VariableManager]: TermVariabe Process0Thread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:20:55,737 WARN L313 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:20:55,738 WARN L313 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 03:20:55,739 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 03:20:55,753 INFO L255 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-06-05 03:20:55,769 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 03:20:55,769 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 03:20:55,769 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 03:20:55,769 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 03:20:55,769 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 03:20:55,769 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 03:20:55,769 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 03:20:55,769 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 03:20:55,777 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 26 transitions, 62 flow [2021-06-05 03:20:55,817 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 212 states, 208 states have (on average 2.5096153846153846) internal successors, (522), 211 states have internal predecessors, (522), 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 03:20:55,819 INFO L276 IsEmpty]: Start isEmpty. Operand has 212 states, 208 states have (on average 2.5096153846153846) internal successors, (522), 211 states have internal predecessors, (522), 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 03:20:55,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-06-05 03:20:55,830 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:20:55,830 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-06-05 03:20:55,830 INFO L430 AbstractCegarLoop]: === Iteration 1 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-05 03:20:55,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:20:55,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1990965056, now seen corresponding path program 1 times [2021-06-05 03:20:55,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:20:55,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919181461] [2021-06-05 03:20:55,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:20:55,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:20:55,917 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 03:20:55,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:20:55,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919181461] [2021-06-05 03:20:55,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919181461] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:20:55,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:20:55,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-05 03:20:55,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215729761] [2021-06-05 03:20:55,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 03:20:55,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:20:55,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 03:20:55,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 03:20:55,931 INFO L87 Difference]: Start difference. First operand has 212 states, 208 states have (on average 2.5096153846153846) internal successors, (522), 211 states have internal predecessors, (522), 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 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:20:55,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:20:55,965 INFO L93 Difference]: Finished difference Result 159 states and 367 transitions. [2021-06-05 03:20:55,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 03:20:55,966 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-06-05 03:20:55,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:20:55,973 INFO L225 Difference]: With dead ends: 159 [2021-06-05 03:20:55,974 INFO L226 Difference]: Without dead ends: 159 [2021-06-05 03:20:55,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 03:20:55,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-06-05 03:20:56,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2021-06-05 03:20:56,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 155 states have (on average 2.303225806451613) internal successors, (357), 154 states have internal predecessors, (357), 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 03:20:56,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 357 transitions. [2021-06-05 03:20:56,012 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 357 transitions. Word has length 6 [2021-06-05 03:20:56,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:20:56,012 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 357 transitions. [2021-06-05 03:20:56,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:20:56,012 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 357 transitions. [2021-06-05 03:20:56,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 03:20:56,013 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:20:56,013 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:20:56,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 03:20:56,013 INFO L430 AbstractCegarLoop]: === Iteration 2 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-05 03:20:56,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:20:56,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1224981428, now seen corresponding path program 1 times [2021-06-05 03:20:56,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:20:56,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447814701] [2021-06-05 03:20:56,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:20:56,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:20:56,048 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 03:20:56,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:20:56,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447814701] [2021-06-05 03:20:56,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447814701] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:20:56,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:20:56,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 03:20:56,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570632830] [2021-06-05 03:20:56,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 03:20:56,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:20:56,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 03:20:56,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 03:20:56,050 INFO L87 Difference]: Start difference. First operand 155 states and 357 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 03:20:56,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:20:56,065 INFO L93 Difference]: Finished difference Result 159 states and 357 transitions. [2021-06-05 03:20:56,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 03:20:56,065 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 12 [2021-06-05 03:20:56,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:20:56,067 INFO L225 Difference]: With dead ends: 159 [2021-06-05 03:20:56,067 INFO L226 Difference]: Without dead ends: 159 [2021-06-05 03:20:56,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 03:20:56,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-06-05 03:20:56,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 151. [2021-06-05 03:20:56,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.26) internal successors, (339), 150 states have internal predecessors, (339), 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 03:20:56,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 339 transitions. [2021-06-05 03:20:56,079 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 339 transitions. Word has length 12 [2021-06-05 03:20:56,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:20:56,079 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 339 transitions. [2021-06-05 03:20:56,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 03:20:56,080 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 339 transitions. [2021-06-05 03:20:56,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 03:20:56,080 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:20:56,081 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:20:56,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 03:20:56,081 INFO L430 AbstractCegarLoop]: === Iteration 3 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-05 03:20:56,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:20:56,081 INFO L82 PathProgramCache]: Analyzing trace with hash 719296298, now seen corresponding path program 1 times [2021-06-05 03:20:56,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:20:56,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684080809] [2021-06-05 03:20:56,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:20:56,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 03:20:56,089 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 03:20:56,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 03:20:56,093 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 03:20:56,103 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-05 03:20:56,103 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-06-05 03:20:56,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 03:20:56,105 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 03:20:56,112 INFO L202 PluginConnector]: Adding new model PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 03:20:56 BasicIcfg [2021-06-05 03:20:56,112 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 03:20:56,113 INFO L168 Benchmark]: Toolchain (without parser) took 597.50 ms. Allocated memory is still 383.8 MB. Free memory was 363.4 MB in the beginning and 339.8 MB in the end (delta: 23.6 MB). Peak memory consumption was 25.6 MB. Max. memory is 16.0 GB. [2021-06-05 03:20:56,113 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 383.8 MB. Free memory was 364.5 MB in the beginning and 364.4 MB in the end (delta: 136.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 03:20:56,114 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.27 ms. Allocated memory is still 383.8 MB. Free memory was 363.4 MB in the beginning and 361.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 03:20:56,114 INFO L168 Benchmark]: Boogie Preprocessor took 11.19 ms. Allocated memory is still 383.8 MB. Free memory was 361.9 MB in the beginning and 361.0 MB in the end (delta: 915.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 03:20:56,114 INFO L168 Benchmark]: RCFGBuilder took 153.89 ms. Allocated memory is still 383.8 MB. Free memory was 360.8 MB in the beginning and 350.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-06-05 03:20:56,115 INFO L168 Benchmark]: TraceAbstraction took 407.36 ms. Allocated memory is still 383.8 MB. Free memory was 350.4 MB in the beginning and 339.8 MB in the end (delta: 10.6 MB). Peak memory consumption was 11.0 MB. Max. memory is 16.0 GB. [2021-06-05 03:20:56,116 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 383.8 MB. Free memory was 364.5 MB in the beginning and 364.4 MB in the end (delta: 136.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 20.27 ms. Allocated memory is still 383.8 MB. Free memory was 363.4 MB in the beginning and 361.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.19 ms. Allocated memory is still 383.8 MB. Free memory was 361.9 MB in the beginning and 361.0 MB in the end (delta: 915.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 153.89 ms. Allocated memory is still 383.8 MB. Free memory was 360.8 MB in the beginning and 350.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 407.36 ms. Allocated memory is still 383.8 MB. Free memory was 350.4 MB in the beginning and 339.8 MB in the end (delta: 10.6 MB). Peak memory consumption was 11.0 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 40]: assertion can be violated assertion can be violated We found a FailurePath: [L25] 0 critical := 0; VAL [critical=0] [L26] FORK 0 fork 0 Process0(); VAL [critical=0] [L37] 1 turn := 1; VAL [critical=0, turn=1] [L27] FORK 0 fork 1 Process1(); VAL [critical=0, turn=1] [L56] 2 flag1 := 1; VAL [critical=0, flag1=1, turn=1] [L57] 2 turn := 0; VAL [critical=0, flag1=1, turn=0] [L58] 2 assume flag0 == 0 || turn == 1; VAL [critical=0, flag0=0, flag1=1, turn=0] [L59] 2 assert critical == 0; VAL [critical=0, flag0=0, flag1=1, turn=0] [L60] 2 critical := 1; VAL [critical=1, flag0=0, flag1=1, turn=0] [L38] 1 flag0 := 1; VAL [critical=1, flag0=1, flag1=1, turn=0] [L39] 1 assume flag1 == 0 || turn == 0; VAL [critical=1, flag0=1, flag1=1, turn=0] [L40] 1 assert critical == 0; VAL [critical=1, flag0=1, flag1=1, turn=0] - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 47 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 336.4ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 14.0ms, AutomataDifference: 70.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 47.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 53 SDtfs, 24 SDslu, 33 SDs, 0 SdLazy, 14 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 15.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=212occurred in iteration=0, InterpolantAutomatonStates: 7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 40.5ms AutomataMinimizationTime, 2 MinimizatonAttempts, 12 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 4.3ms SsaConstructionTime, 17.1ms SatisfiabilityAnalysisTime, 59.2ms InterpolantComputationTime, 30 NumberOfCodeBlocks, 30 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 44 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 incorrect! Received shutdown request...