/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe-OGIterative-CovSimpl-Hitting.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/showcase/PetersonWithBug.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2cf4d3f9dd5fed411db405f577e28237a543b59a-2cf4d3f [2021-08-13 17:54:02,416 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-13 17:54:02,419 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-13 17:54:02,447 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-13 17:54:02,491 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-PN-NoLbe-OGIterative-CovSimpl-Hitting.epf [2021-08-13 17:54:02,518 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-13 17:54:02,518 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-13 17:54:02,521 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-13 17:54:02,521 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-13 17:54:02,521 INFO L138 SettingsManager]: * Use SBE=true [2021-08-13 17:54:02,521 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-13 17:54:02,522 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-13 17:54:02,522 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-13 17:54:02,522 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-13 17:54:02,522 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-13 17:54:02,523 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-13 17:54:02,523 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-13 17:54:02,523 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-13 17:54:02,523 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-13 17:54:02,523 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-13 17:54:02,523 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-13 17:54:02,523 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-13 17:54:02,524 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-13 17:54:02,524 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-13 17:54:02,524 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-13 17:54:02,524 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-13 17:54:02,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-13 17:54:02,524 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-13 17:54:02,524 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-13 17:54:02,525 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-13 17:54:02,525 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-13 17:54:02,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-13 17:54:02,525 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-13 17:54:02,525 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-08-13 17:54:02,525 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-13 17:54:02,525 INFO L138 SettingsManager]: * Compute cosets for OwickiGries annotation iteratively=true [2021-08-13 17:54:02,525 INFO L138 SettingsManager]: * Use hitting sets in computation of OwickiGries annotation=true [2021-08-13 17:54:02,526 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-08-13 17:54:02,526 INFO L138 SettingsManager]: * Simplify away covered predicates in OwickiGries annotation=true 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-13 17:54:02,776 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-13 17:54:02,793 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-13 17:54:02,794 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-13 17:54:02,795 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-13 17:54:02,796 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-13 17:54:02,797 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/showcase/PetersonWithBug.bpl [2021-08-13 17:54:02,797 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/showcase/PetersonWithBug.bpl' [2021-08-13 17:54:02,820 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-13 17:54:02,821 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-13 17:54:02,822 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-13 17:54:02,822 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-13 17:54:02,822 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-13 17:54:02,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 05:54:02" (1/1) ... [2021-08-13 17:54:02,836 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 05:54:02" (1/1) ... [2021-08-13 17:54:02,841 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-13 17:54:02,842 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-13 17:54:02,842 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-13 17:54:02,843 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-13 17:54:02,848 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 05:54:02" (1/1) ... [2021-08-13 17:54:02,848 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 05:54:02" (1/1) ... [2021-08-13 17:54:02,848 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 05:54:02" (1/1) ... [2021-08-13 17:54:02,849 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 05:54:02" (1/1) ... [2021-08-13 17:54:02,851 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 05:54:02" (1/1) ... [2021-08-13 17:54:02,853 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 05:54:02" (1/1) ... [2021-08-13 17:54:02,853 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 05:54:02" (1/1) ... [2021-08-13 17:54:02,854 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-13 17:54:02,856 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-13 17:54:02,856 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-13 17:54:02,856 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-13 17:54:02,861 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 05:54:02" (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 [2021-08-13 17:54:02,923 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Process0 given in one single declaration [2021-08-13 17:54:02,923 INFO L130 BoogieDeclarations]: Found specification of procedure Process0 [2021-08-13 17:54:02,923 INFO L138 BoogieDeclarations]: Found implementation of procedure Process0 [2021-08-13 17:54:02,923 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Process1 given in one single declaration [2021-08-13 17:54:02,923 INFO L130 BoogieDeclarations]: Found specification of procedure Process1 [2021-08-13 17:54:02,923 INFO L138 BoogieDeclarations]: Found implementation of procedure Process1 [2021-08-13 17:54:02,924 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-13 17:54:02,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-13 17:54:02,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-13 17:54:02,924 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-13 17:54:03,038 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-13 17:54:03,039 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-08-13 17:54:03,040 INFO L202 PluginConnector]: Adding new model PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.08 05:54:03 BoogieIcfgContainer [2021-08-13 17:54:03,040 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-13 17:54:03,041 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-13 17:54:03,041 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-13 17:54:03,043 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-13 17:54:03,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 05:54:02" (1/2) ... [2021-08-13 17:54:03,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24db9e78 and model type PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.08 05:54:03, skipping insertion in model container [2021-08-13 17:54:03,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.08 05:54:03" (2/2) ... [2021-08-13 17:54:03,045 INFO L111 eAbstractionObserver]: Analyzing ICFG PetersonWithBug.bpl [2021-08-13 17:54:03,048 INFO L206 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-13 17:54:03,053 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-08-13 17:54:03,054 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-13 17:54:03,085 WARN L313 ript$VariableManager]: TermVariabe Process0Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 17:54:03,085 WARN L313 ript$VariableManager]: TermVariabe Process0Thread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 17:54:03,087 WARN L313 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 17:54:03,087 WARN L313 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 17:54:03,088 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 17:54:03,112 INFO L255 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-08-13 17:54:03,142 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 17:54:03,142 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 17:54:03,142 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 17:54:03,142 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 17:54:03,142 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 17:54:03,143 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 17:54:03,143 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 17:54:03,143 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 17:54:03,151 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 31 places, 26 transitions, 62 flow [2021-08-13 17:54:03,164 INFO L129 PetriNetUnfolder]: 2/24 cut-off events. [2021-08-13 17:54:03,164 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 17:54:03,166 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31 conditions, 24 events. 2/24 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 40 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2021-08-13 17:54:03,167 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 26 transitions, 62 flow [2021-08-13 17:54:03,169 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 24 transitions, 54 flow [2021-08-13 17:54:03,173 INFO L129 PetriNetUnfolder]: 0/14 cut-off events. [2021-08-13 17:54:03,173 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 17:54:03,174 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 17:54:03,174 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-13 17:54:03,174 INFO L430 AbstractCegarLoop]: === Iteration 1 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, Process1Err0ASSERT_VIOLATIONASSERT, Process0Err0ASSERT_VIOLATIONASSERT]=== [2021-08-13 17:54:03,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 17:54:03,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1990965056, now seen corresponding path program 1 times [2021-08-13 17:54:03,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 17:54:03,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289061538] [2021-08-13 17:54:03,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 17:54:03,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 17:54:03,246 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:54:03,247 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:54:03,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 17:54:03,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 17:54:03,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289061538] [2021-08-13 17:54:03,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289061538] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 17:54:03,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 17:54:03,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-13 17:54:03,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442402619] [2021-08-13 17:54:03,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 17:54:03,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 17:54:03,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 17:54:03,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 17:54:03,276 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 26 [2021-08-13 17:54:03,278 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2021-08-13 17:54:03,278 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 17:54:03,278 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 26 [2021-08-13 17:54:03,279 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 17:54:03,316 INFO L129 PetriNetUnfolder]: 22/81 cut-off events. [2021-08-13 17:54:03,317 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 17:54:03,318 INFO L84 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 81 events. 22/81 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 232 event pairs, 4 based on Foata normal form. 15/92 useless extension candidates. Maximal degree in co-relation 125. Up to 30 conditions per place. [2021-08-13 17:54:03,319 INFO L132 encePairwiseOnDemand]: 15/26 looper letters, 8 selfloop transitions, 7 changer transitions 0/26 dead transitions. [2021-08-13 17:54:03,319 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 26 transitions, 88 flow [2021-08-13 17:54:03,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 17:54:03,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 17:54:03,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 66 transitions. [2021-08-13 17:54:03,326 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.8461538461538461 [2021-08-13 17:54:03,326 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 66 transitions. [2021-08-13 17:54:03,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 66 transitions. [2021-08-13 17:54:03,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 17:54:03,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 66 transitions. [2021-08-13 17:54:03,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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) [2021-08-13 17:54:03,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 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) [2021-08-13 17:54:03,332 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 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) [2021-08-13 17:54:03,333 INFO L348 CegarLoopForPetriNet]: 29 programPoint places, -2 predicate places. [2021-08-13 17:54:03,333 INFO L482 AbstractCegarLoop]: Abstraction has has 27 places, 26 transitions, 88 flow [2021-08-13 17:54:03,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2021-08-13 17:54:03,333 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 17:54:03,333 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 17:54:03,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-13 17:54:03,334 INFO L430 AbstractCegarLoop]: === Iteration 2 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, Process1Err0ASSERT_VIOLATIONASSERT, Process0Err0ASSERT_VIOLATIONASSERT]=== [2021-08-13 17:54:03,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 17:54:03,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1226902786, now seen corresponding path program 1 times [2021-08-13 17:54:03,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 17:54:03,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650288970] [2021-08-13 17:54:03,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 17:54:03,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 17:54:03,349 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:54:03,350 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 17:54:03,351 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:54:03,351 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:54:03,358 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:54:03,359 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 17:54:03,366 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:54:03,366 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 17:54:03,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 17:54:03,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 17:54:03,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650288970] [2021-08-13 17:54:03,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650288970] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 17:54:03,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 17:54:03,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-13 17:54:03,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384325941] [2021-08-13 17:54:03,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-13 17:54:03,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 17:54:03,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-13 17:54:03,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-13 17:54:03,370 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 26 [2021-08-13 17:54:03,370 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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) [2021-08-13 17:54:03,370 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 17:54:03,370 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 26 [2021-08-13 17:54:03,370 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 17:54:03,401 INFO L129 PetriNetUnfolder]: 29/105 cut-off events. [2021-08-13 17:54:03,401 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 17:54:03,402 INFO L84 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 105 events. 29/105 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 340 event pairs, 5 based on Foata normal form. 5/104 useless extension candidates. Maximal degree in co-relation 196. Up to 32 conditions per place. [2021-08-13 17:54:03,402 INFO L132 encePairwiseOnDemand]: 21/26 looper letters, 6 selfloop transitions, 5 changer transitions 0/31 dead transitions. [2021-08-13 17:54:03,402 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 31 transitions, 120 flow [2021-08-13 17:54:03,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-13 17:54:03,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-08-13 17:54:03,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 84 transitions. [2021-08-13 17:54:03,404 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.8076923076923077 [2021-08-13 17:54:03,404 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 84 transitions. [2021-08-13 17:54:03,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 84 transitions. [2021-08-13 17:54:03,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 17:54:03,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 84 transitions. [2021-08-13 17:54:03,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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) [2021-08-13 17:54:03,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 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) [2021-08-13 17:54:03,406 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 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) [2021-08-13 17:54:03,406 INFO L348 CegarLoopForPetriNet]: 29 programPoint places, 1 predicate places. [2021-08-13 17:54:03,406 INFO L482 AbstractCegarLoop]: Abstraction has has 30 places, 31 transitions, 120 flow [2021-08-13 17:54:03,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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) [2021-08-13 17:54:03,406 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 17:54:03,407 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 17:54:03,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-13 17:54:03,407 INFO L430 AbstractCegarLoop]: === Iteration 3 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, Process1Err0ASSERT_VIOLATIONASSERT, Process0Err0ASSERT_VIOLATIONASSERT]=== [2021-08-13 17:54:03,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 17:54:03,407 INFO L82 PathProgramCache]: Analyzing trace with hash -791483276, now seen corresponding path program 2 times [2021-08-13 17:54:03,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 17:54:03,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774730471] [2021-08-13 17:54:03,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 17:54:03,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 17:54:03,418 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:54:03,419 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 17:54:03,420 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:54:03,420 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:54:03,423 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:54:03,424 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 17:54:03,430 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:54:03,430 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 17:54:03,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 17:54:03,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 17:54:03,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774730471] [2021-08-13 17:54:03,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774730471] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 17:54:03,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 17:54:03,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-13 17:54:03,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68668073] [2021-08-13 17:54:03,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-13 17:54:03,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 17:54:03,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-13 17:54:03,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-13 17:54:03,433 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 26 [2021-08-13 17:54:03,433 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 31 transitions, 120 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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) [2021-08-13 17:54:03,433 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 17:54:03,433 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 26 [2021-08-13 17:54:03,433 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 17:54:03,455 INFO L129 PetriNetUnfolder]: 32/107 cut-off events. [2021-08-13 17:54:03,455 INFO L130 PetriNetUnfolder]: For 7/9 co-relation queries the response was YES. [2021-08-13 17:54:03,456 INFO L84 FinitePrefix]: Finished finitePrefix Result has 247 conditions, 107 events. 32/107 cut-off events. For 7/9 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 362 event pairs, 4 based on Foata normal form. 6/109 useless extension candidates. Maximal degree in co-relation 236. Up to 31 conditions per place. [2021-08-13 17:54:03,456 INFO L132 encePairwiseOnDemand]: 22/26 looper letters, 11 selfloop transitions, 5 changer transitions 0/37 dead transitions. [2021-08-13 17:54:03,456 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 37 transitions, 174 flow [2021-08-13 17:54:03,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-13 17:54:03,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-08-13 17:54:03,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 83 transitions. [2021-08-13 17:54:03,458 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.7980769230769231 [2021-08-13 17:54:03,458 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 83 transitions. [2021-08-13 17:54:03,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 83 transitions. [2021-08-13 17:54:03,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 17:54:03,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 83 transitions. [2021-08-13 17:54:03,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 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) [2021-08-13 17:54:03,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 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) [2021-08-13 17:54:03,459 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 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) [2021-08-13 17:54:03,460 INFO L348 CegarLoopForPetriNet]: 29 programPoint places, 4 predicate places. [2021-08-13 17:54:03,460 INFO L482 AbstractCegarLoop]: Abstraction has has 33 places, 37 transitions, 174 flow [2021-08-13 17:54:03,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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) [2021-08-13 17:54:03,460 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 17:54:03,460 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 17:54:03,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-13 17:54:03,460 INFO L430 AbstractCegarLoop]: === Iteration 4 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, Process1Err0ASSERT_VIOLATIONASSERT, Process0Err0ASSERT_VIOLATIONASSERT]=== [2021-08-13 17:54:03,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 17:54:03,461 INFO L82 PathProgramCache]: Analyzing trace with hash -897079962, now seen corresponding path program 3 times [2021-08-13 17:54:03,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 17:54:03,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533944829] [2021-08-13 17:54:03,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 17:54:03,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 17:54:03,466 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 17:54:03,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 17:54:03,469 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 17:54:03,484 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 17:54:03,485 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 17:54:03,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-13 17:54:03,487 INFO L239 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-13 17:54:03,493 INFO L202 PluginConnector]: Adding new model PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.08 05:54:03 BasicIcfg [2021-08-13 17:54:03,494 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-13 17:54:03,494 INFO L168 Benchmark]: Toolchain (without parser) took 672.76 ms. Allocated memory is still 211.8 MB. Free memory was 193.1 MB in the beginning and 193.7 MB in the end (delta: -521.3 kB). Peak memory consumption was 63.0 MB. Max. memory is 8.0 GB. [2021-08-13 17:54:03,495 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 211.8 MB. Free memory is still 194.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-13 17:54:03,495 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.63 ms. Allocated memory is still 211.8 MB. Free memory was 193.1 MB in the beginning and 191.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-13 17:54:03,495 INFO L168 Benchmark]: Boogie Preprocessor took 12.89 ms. Allocated memory is still 211.8 MB. Free memory was 191.7 MB in the beginning and 190.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-13 17:54:03,496 INFO L168 Benchmark]: RCFGBuilder took 183.62 ms. Allocated memory is still 211.8 MB. Free memory was 190.6 MB in the beginning and 180.5 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-08-13 17:54:03,496 INFO L168 Benchmark]: TraceAbstraction took 452.67 ms. Allocated memory is still 211.8 MB. Free memory was 180.1 MB in the beginning and 193.7 MB in the end (delta: -13.6 MB). Peak memory consumption was 50.4 MB. Max. memory is 8.0 GB. [2021-08-13 17:54:03,498 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 211.8 MB. Free memory is still 194.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 19.63 ms. Allocated memory is still 211.8 MB. Free memory was 193.1 MB in the beginning and 191.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 12.89 ms. Allocated memory is still 211.8 MB. Free memory was 191.7 MB in the beginning and 190.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 183.62 ms. Allocated memory is still 211.8 MB. Free memory was 190.6 MB in the beginning and 180.5 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 452.67 ms. Allocated memory is still 211.8 MB. Free memory was 180.1 MB in the beginning and 193.7 MB in the end (delta: -13.6 MB). Peak memory consumption was 50.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 59]: 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] [L27] FORK 0 fork 1 Process1(); VAL [critical=0] [L37] 1 turn := 1; 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] [L38] 1 flag0 := 1; VAL [critical=0, flag0=1, flag1=1, turn=0] [L39] 1 assume flag1 == 0 || turn == 0; VAL [critical=0, flag0=1, flag1=1, turn=0] [L40] 1 assert critical == 0; VAL [critical=0, flag0=1, flag1=1, turn=0] [L41] 1 critical := 1; VAL [critical=1, flag0=1, flag1=1, turn=0] [L59] 2 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. EmptinessCheckTime: 3.8ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 362.4ms, OverallIterations: 4, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 124.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 26.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 26 SDtfs, 8 SDslu, 3 SDs, 0 SdLazy, 24 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 25.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=174occurred in iteration=3, InterpolantAutomatonStates: 11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 4.8ms SsaConstructionTime, 16.9ms SatisfiabilityAnalysisTime, 76.4ms InterpolantComputationTime, 42 NumberOfCodeBlocks, 42 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 27 ConstructedInterpolants, 0 QuantifiedInterpolants, 69 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 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...