/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-PN-RepeatedSemanticLbeWithPredicates.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/showcase/PetersonWithBug.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-6f4246e9f5583d222ebb38ff8175c901f3a528f0-6f4246e [2021-04-29 03:55:39,548 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-29 03:55:39,551 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-29 03:55:39,592 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-04-29 03:55:39,592 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-04-29 03:55:39,597 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-04-29 03:55:39,601 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-04-29 03:55:39,609 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-04-29 03:55:39,612 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-04-29 03:55:39,618 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-04-29 03:55:39,619 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-04-29 03:55:39,621 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-04-29 03:55:39,621 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-04-29 03:55:39,624 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-04-29 03:55:39,626 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-04-29 03:55:39,628 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-04-29 03:55:39,631 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-04-29 03:55:39,633 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-04-29 03:55:39,642 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-04-29 03:55:39,646 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-04-29 03:55:39,648 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-04-29 03:55:39,652 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-04-29 03:55:39,654 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-04-29 03:55:39,657 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-04-29 03:55:39,662 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-04-29 03:55:39,682 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-RepeatedSemanticLbeWithPredicates.epf [2021-04-29 03:55:39,737 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-29 03:55:39,738 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-29 03:55:39,743 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-29 03:55:39,743 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-29 03:55:39,743 INFO L138 SettingsManager]: * Use SBE=true [2021-04-29 03:55:39,744 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-29 03:55:39,744 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-29 03:55:39,744 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-29 03:55:39,744 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-29 03:55:39,745 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-29 03:55:39,746 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-29 03:55:39,746 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-29 03:55:39,746 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-29 03:55:39,747 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-29 03:55:39,747 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-29 03:55:39,747 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-29 03:55:39,747 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-29 03:55:39,748 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-29 03:55:39,748 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-29 03:55:39,748 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-29 03:55:39,749 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-29 03:55:39,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-29 03:55:39,749 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-29 03:55:39,749 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-29 03:55:39,750 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-29 03:55:39,750 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-29 03:55:39,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-29 03:55:39,750 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=SEMANTIC_BASED_MOVER_CHECK_WITH_PREDICATES [2021-04-29 03:55:39,750 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-04-29 03:55:39,751 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-04-29 03:55:39,751 INFO L138 SettingsManager]: * Apply repeated Lipton Reduction=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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-29 03:55:40,169 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-29 03:55:40,202 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-29 03:55:40,205 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-29 03:55:40,207 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-04-29 03:55:40,208 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-04-29 03:55:40,209 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/showcase/PetersonWithBug.bpl [2021-04-29 03:55:40,210 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/showcase/PetersonWithBug.bpl' [2021-04-29 03:55:40,256 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-29 03:55:40,309 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-29 03:55:40,311 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-04-29 03:55:40,311 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-04-29 03:55:40,311 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-04-29 03:55:40,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.04 03:55:40" (1/1) ... [2021-04-29 03:55:40,338 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.04 03:55:40" (1/1) ... [2021-04-29 03:55:40,350 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-04-29 03:55:40,352 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-29 03:55:40,352 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-29 03:55:40,352 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-29 03:55:40,362 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.04 03:55:40" (1/1) ... [2021-04-29 03:55:40,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.04 03:55:40" (1/1) ... [2021-04-29 03:55:40,363 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.04 03:55:40" (1/1) ... [2021-04-29 03:55:40,363 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.04 03:55:40" (1/1) ... [2021-04-29 03:55:40,366 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.04 03:55:40" (1/1) ... [2021-04-29 03:55:40,370 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.04 03:55:40" (1/1) ... [2021-04-29 03:55:40,371 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.04 03:55:40" (1/1) ... [2021-04-29 03:55:40,372 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-29 03:55:40,373 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-29 03:55:40,373 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-29 03:55:40,373 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-29 03:55:40,375 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.04 03:55:40" (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 [2021-04-29 03:55:40,481 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Process0 given in one single declaration [2021-04-29 03:55:40,481 INFO L130 BoogieDeclarations]: Found specification of procedure Process0 [2021-04-29 03:55:40,482 INFO L138 BoogieDeclarations]: Found implementation of procedure Process0 [2021-04-29 03:55:40,482 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Process1 given in one single declaration [2021-04-29 03:55:40,482 INFO L130 BoogieDeclarations]: Found specification of procedure Process1 [2021-04-29 03:55:40,482 INFO L138 BoogieDeclarations]: Found implementation of procedure Process1 [2021-04-29 03:55:40,482 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-04-29 03:55:40,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-29 03:55:40,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-29 03:55:40,484 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-04-29 03:55:40,668 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-29 03:55:40,668 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-04-29 03:55:40,670 INFO L202 PluginConnector]: Adding new model PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.04 03:55:40 BoogieIcfgContainer [2021-04-29 03:55:40,670 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-29 03:55:40,672 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-29 03:55:40,673 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-29 03:55:40,676 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-29 03:55:40,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.04 03:55:40" (1/2) ... [2021-04-29 03:55:40,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b1e879e and model type PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.04 03:55:40, skipping insertion in model container [2021-04-29 03:55:40,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.04 03:55:40" (2/2) ... [2021-04-29 03:55:40,679 INFO L111 eAbstractionObserver]: Analyzing ICFG PetersonWithBug.bpl [2021-04-29 03:55:40,690 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-29 03:55:40,696 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-04-29 03:55:40,697 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-04-29 03:55:40,730 WARN L313 ript$VariableManager]: TermVariabe Process0Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-29 03:55:40,730 WARN L313 ript$VariableManager]: TermVariabe Process0Thread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-29 03:55:40,735 WARN L313 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-29 03:55:40,735 WARN L313 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-29 03:55:40,737 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-04-29 03:55:40,757 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-04-29 03:55:40,783 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-29 03:55:40,784 INFO L377 AbstractCegarLoop]: Hoare is false [2021-04-29 03:55:40,784 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-29 03:55:40,784 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-29 03:55:40,784 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-29 03:55:40,784 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-29 03:55:40,784 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-29 03:55:40,785 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-29 03:55:40,798 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 31 places, 26 transitions, 62 flow [2021-04-29 03:55:40,823 INFO L129 PetriNetUnfolder]: 2/24 cut-off events. [2021-04-29 03:55:40,823 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-04-29 03:55:40,828 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. [2021-04-29 03:55:40,828 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 26 transitions, 62 flow [2021-04-29 03:55:40,834 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 24 transitions, 54 flow [2021-04-29 03:55:40,836 INFO L171 etLargeBlockEncoding]: Petri net LBE is using conditional semantic-based independence relation. [2021-04-29 03:55:40,851 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 29 places, 24 transitions, 54 flow [2021-04-29 03:55:40,855 INFO L133 LiptonReduction]: Starting Lipton reduction on Petri net that has 29 places, 24 transitions, 54 flow [2021-04-29 03:55:40,856 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 29 places, 24 transitions, 54 flow [2021-04-29 03:55:40,866 INFO L129 PetriNetUnfolder]: 2/24 cut-off events. [2021-04-29 03:55:40,867 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-04-29 03:55:40,868 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 47 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. [2021-04-29 03:55:40,871 INFO L146 LiptonReduction]: Number of co-enabled transitions 260 [2021-04-29 03:55:41,322 INFO L158 LiptonReduction]: Checked pairs total: 528 [2021-04-29 03:55:41,322 INFO L160 LiptonReduction]: Total number of compositions: 6 [2021-04-29 03:55:41,325 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 491 [2021-04-29 03:55:41,348 INFO L129 PetriNetUnfolder]: 0/13 cut-off events. [2021-04-29 03:55:41,348 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-04-29 03:55:41,349 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-04-29 03:55:41,350 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-04-29 03:55:41,350 INFO L428 AbstractCegarLoop]: === Iteration 1 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-04-29 03:55:41,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-29 03:55:41,356 INFO L82 PathProgramCache]: Analyzing trace with hash 74323396, now seen corresponding path program 1 times [2021-04-29 03:55:41,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-29 03:55:41,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884972066] [2021-04-29 03:55:41,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-29 03:55:41,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-29 03:55:41,509 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-29 03:55:41,511 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-29 03:55:41,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-29 03:55:41,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884972066] [2021-04-29 03:55:41,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-29 03:55:41,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-04-29 03:55:41,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888586566] [2021-04-29 03:55:41,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-29 03:55:41,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-29 03:55:41,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-29 03:55:41,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-29 03:55:41,576 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 32 [2021-04-29 03:55:41,578 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) [2021-04-29 03:55:41,578 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-04-29 03:55:41,578 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 32 [2021-04-29 03:55:41,580 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-04-29 03:55:41,702 INFO L129 PetriNetUnfolder]: 33/93 cut-off events. [2021-04-29 03:55:41,702 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-04-29 03:55:41,704 INFO L84 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 93 events. 33/93 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 302 event pairs, 5 based on Foata normal form. 15/79 useless extension candidates. Maximal degree in co-relation 158. Up to 50 conditions per place. [2021-04-29 03:55:41,708 INFO L132 encePairwiseOnDemand]: 17/32 looper letters, 8 selfloop transitions, 9 changer transitions 2/28 dead transitions. [2021-04-29 03:55:41,709 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 28 transitions, 100 flow [2021-04-29 03:55:41,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-29 03:55:41,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-04-29 03:55:41,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2021-04-29 03:55:41,733 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8333333333333334 [2021-04-29 03:55:41,735 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 80 transitions. [2021-04-29 03:55:41,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 80 transitions. [2021-04-29 03:55:41,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-04-29 03:55:41,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 80 transitions. [2021-04-29 03:55:41,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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) [2021-04-29 03:55:41,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 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) [2021-04-29 03:55:41,754 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 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) [2021-04-29 03:55:41,756 INFO L185 Difference]: Start difference. First operand has 29 places, 24 transitions, 54 flow. Second operand 3 states and 80 transitions. [2021-04-29 03:55:41,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 28 transitions, 100 flow [2021-04-29 03:55:41,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 28 transitions, 98 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-04-29 03:55:41,774 INFO L241 Difference]: Finished difference. Result has 27 places, 26 transitions, 108 flow [2021-04-29 03:55:41,777 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=27, PETRI_TRANSITIONS=26} [2021-04-29 03:55:41,778 INFO L343 CegarLoopForPetriNet]: 29 programPoint places, -2 predicate places. [2021-04-29 03:55:41,778 INFO L171 etLargeBlockEncoding]: Petri net LBE is using conditional semantic-based independence relation. [2021-04-29 03:55:41,779 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 27 places, 26 transitions, 108 flow [2021-04-29 03:55:41,780 INFO L133 LiptonReduction]: Starting Lipton reduction on Petri net that has 27 places, 26 transitions, 108 flow [2021-04-29 03:55:41,781 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 27 places, 26 transitions, 108 flow [2021-04-29 03:55:41,825 INFO L129 PetriNetUnfolder]: 27/87 cut-off events. [2021-04-29 03:55:41,825 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-04-29 03:55:41,828 INFO L84 FinitePrefix]: Finished finitePrefix Result has 191 conditions, 87 events. 27/87 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 307 event pairs, 4 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 182. Up to 44 conditions per place. [2021-04-29 03:55:41,831 INFO L146 LiptonReduction]: Number of co-enabled transitions 136 [2021-04-29 03:55:41,883 INFO L158 LiptonReduction]: Checked pairs total: 115 [2021-04-29 03:55:41,884 INFO L160 LiptonReduction]: Total number of compositions: 0 [2021-04-29 03:55:41,884 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 106 [2021-04-29 03:55:41,887 INFO L480 AbstractCegarLoop]: Abstraction has has 27 places, 26 transitions, 108 flow [2021-04-29 03:55:41,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) [2021-04-29 03:55:41,888 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-04-29 03:55:41,889 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-29 03:55:41,889 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-29 03:55:41,889 INFO L428 AbstractCegarLoop]: === Iteration 2 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-04-29 03:55:41,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-29 03:55:41,892 INFO L82 PathProgramCache]: Analyzing trace with hash -413431067, now seen corresponding path program 1 times [2021-04-29 03:55:41,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-29 03:55:41,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474929870] [2021-04-29 03:55:41,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-29 03:55:41,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-29 03:55:41,951 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-29 03:55:41,952 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-29 03:55:41,955 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-29 03:55:41,957 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-29 03:55:41,976 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-29 03:55:41,977 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-29 03:55:41,987 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-29 03:55:41,988 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-29 03:55:41,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-29 03:55:41,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474929870] [2021-04-29 03:55:41,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-29 03:55:41,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-29 03:55:41,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842714565] [2021-04-29 03:55:41,997 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-29 03:55:41,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-29 03:55:42,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-29 03:55:42,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-04-29 03:55:42,004 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 32 [2021-04-29 03:55:42,006 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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) [2021-04-29 03:55:42,006 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-04-29 03:55:42,007 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 32 [2021-04-29 03:55:42,008 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-04-29 03:55:42,088 INFO L129 PetriNetUnfolder]: 37/114 cut-off events. [2021-04-29 03:55:42,091 INFO L130 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2021-04-29 03:55:42,094 INFO L84 FinitePrefix]: Finished finitePrefix Result has 282 conditions, 114 events. 37/114 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 414 event pairs, 7 based on Foata normal form. 5/102 useless extension candidates. Maximal degree in co-relation 272. Up to 51 conditions per place. [2021-04-29 03:55:42,095 INFO L132 encePairwiseOnDemand]: 27/32 looper letters, 5 selfloop transitions, 7 changer transitions 0/31 dead transitions. [2021-04-29 03:55:42,095 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 31 transitions, 148 flow [2021-04-29 03:55:42,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-29 03:55:42,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-04-29 03:55:42,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 87 transitions. [2021-04-29 03:55:42,105 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6796875 [2021-04-29 03:55:42,105 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 87 transitions. [2021-04-29 03:55:42,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 87 transitions. [2021-04-29 03:55:42,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-04-29 03:55:42,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 87 transitions. [2021-04-29 03:55:42,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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) [2021-04-29 03:55:42,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 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) [2021-04-29 03:55:42,113 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 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) [2021-04-29 03:55:42,113 INFO L185 Difference]: Start difference. First operand has 27 places, 26 transitions, 108 flow. Second operand 4 states and 87 transitions. [2021-04-29 03:55:42,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 31 transitions, 148 flow [2021-04-29 03:55:42,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 31 transitions, 128 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-04-29 03:55:42,120 INFO L241 Difference]: Finished difference. Result has 30 places, 29 transitions, 126 flow [2021-04-29 03:55:42,121 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=126, PETRI_PLACES=30, PETRI_TRANSITIONS=29} [2021-04-29 03:55:42,121 INFO L343 CegarLoopForPetriNet]: 29 programPoint places, 1 predicate places. [2021-04-29 03:55:42,122 INFO L171 etLargeBlockEncoding]: Petri net LBE is using conditional semantic-based independence relation. [2021-04-29 03:55:42,122 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 30 places, 29 transitions, 126 flow [2021-04-29 03:55:42,123 INFO L133 LiptonReduction]: Starting Lipton reduction on Petri net that has 30 places, 29 transitions, 126 flow [2021-04-29 03:55:42,124 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 30 places, 29 transitions, 126 flow [2021-04-29 03:55:42,147 INFO L129 PetriNetUnfolder]: 30/98 cut-off events. [2021-04-29 03:55:42,148 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2021-04-29 03:55:42,150 INFO L84 FinitePrefix]: Finished finitePrefix Result has 217 conditions, 98 events. 30/98 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 363 event pairs, 5 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 207. Up to 48 conditions per place. [2021-04-29 03:55:42,153 INFO L146 LiptonReduction]: Number of co-enabled transitions 134 [2021-04-29 03:55:42,167 INFO L158 LiptonReduction]: Checked pairs total: 27 [2021-04-29 03:55:42,167 INFO L160 LiptonReduction]: Total number of compositions: 0 [2021-04-29 03:55:42,167 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 45 [2021-04-29 03:55:42,169 INFO L480 AbstractCegarLoop]: Abstraction has has 30 places, 29 transitions, 126 flow [2021-04-29 03:55:42,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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) [2021-04-29 03:55:42,170 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-04-29 03:55:42,170 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-29 03:55:42,170 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-29 03:55:42,170 INFO L428 AbstractCegarLoop]: === Iteration 3 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-04-29 03:55:42,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-29 03:55:42,171 INFO L82 PathProgramCache]: Analyzing trace with hash -675466535, now seen corresponding path program 2 times [2021-04-29 03:55:42,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-29 03:55:42,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881710041] [2021-04-29 03:55:42,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-29 03:55:42,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-29 03:55:42,222 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-29 03:55:42,223 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-29 03:55:42,224 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-29 03:55:42,224 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-29 03:55:42,229 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-29 03:55:42,230 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-29 03:55:42,241 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-29 03:55:42,242 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-29 03:55:42,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-29 03:55:42,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881710041] [2021-04-29 03:55:42,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-29 03:55:42,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-29 03:55:42,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308610092] [2021-04-29 03:55:42,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-29 03:55:42,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-29 03:55:42,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-29 03:55:42,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-04-29 03:55:42,249 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 32 [2021-04-29 03:55:42,249 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 29 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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) [2021-04-29 03:55:42,250 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-04-29 03:55:42,250 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 32 [2021-04-29 03:55:42,250 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-04-29 03:55:42,290 INFO L129 PetriNetUnfolder]: 35/115 cut-off events. [2021-04-29 03:55:42,291 INFO L130 PetriNetUnfolder]: For 37/39 co-relation queries the response was YES. [2021-04-29 03:55:42,294 INFO L84 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 115 events. 35/115 cut-off events. For 37/39 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 428 event pairs, 7 based on Foata normal form. 6/116 useless extension candidates. Maximal degree in co-relation 287. Up to 54 conditions per place. [2021-04-29 03:55:42,296 INFO L132 encePairwiseOnDemand]: 27/32 looper letters, 5 selfloop transitions, 7 changer transitions 0/33 dead transitions. [2021-04-29 03:55:42,296 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 33 transitions, 165 flow [2021-04-29 03:55:42,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-29 03:55:42,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-04-29 03:55:42,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 86 transitions. [2021-04-29 03:55:42,302 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.671875 [2021-04-29 03:55:42,302 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 86 transitions. [2021-04-29 03:55:42,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 86 transitions. [2021-04-29 03:55:42,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-04-29 03:55:42,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 86 transitions. [2021-04-29 03:55:42,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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) [2021-04-29 03:55:42,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 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) [2021-04-29 03:55:42,307 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 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) [2021-04-29 03:55:42,307 INFO L185 Difference]: Start difference. First operand has 30 places, 29 transitions, 126 flow. Second operand 4 states and 86 transitions. [2021-04-29 03:55:42,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 33 transitions, 165 flow [2021-04-29 03:55:42,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 33 transitions, 158 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-04-29 03:55:42,325 INFO L241 Difference]: Finished difference. Result has 34 places, 32 transitions, 158 flow [2021-04-29 03:55:42,325 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=158, PETRI_PLACES=34, PETRI_TRANSITIONS=32} [2021-04-29 03:55:42,326 INFO L343 CegarLoopForPetriNet]: 29 programPoint places, 5 predicate places. [2021-04-29 03:55:42,326 INFO L171 etLargeBlockEncoding]: Petri net LBE is using conditional semantic-based independence relation. [2021-04-29 03:55:42,326 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 34 places, 32 transitions, 158 flow [2021-04-29 03:55:42,328 INFO L133 LiptonReduction]: Starting Lipton reduction on Petri net that has 34 places, 32 transitions, 158 flow [2021-04-29 03:55:42,329 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 34 places, 32 transitions, 158 flow [2021-04-29 03:55:42,348 INFO L129 PetriNetUnfolder]: 29/98 cut-off events. [2021-04-29 03:55:42,349 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2021-04-29 03:55:42,349 INFO L84 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 98 events. 29/98 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 349 event pairs, 4 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 251. Up to 48 conditions per place. [2021-04-29 03:55:42,351 INFO L146 LiptonReduction]: Number of co-enabled transitions 130 [2021-04-29 03:55:42,358 INFO L158 LiptonReduction]: Checked pairs total: 0 [2021-04-29 03:55:42,358 INFO L160 LiptonReduction]: Total number of compositions: 0 [2021-04-29 03:55:42,359 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 33 [2021-04-29 03:55:42,365 INFO L480 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 158 flow [2021-04-29 03:55:42,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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) [2021-04-29 03:55:42,365 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-04-29 03:55:42,365 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-29 03:55:42,366 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-04-29 03:55:42,366 INFO L428 AbstractCegarLoop]: === Iteration 4 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-04-29 03:55:42,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-29 03:55:42,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1004446781, now seen corresponding path program 3 times [2021-04-29 03:55:42,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-29 03:55:42,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187676649] [2021-04-29 03:55:42,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-29 03:55:42,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-04-29 03:55:42,387 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-04-29 03:55:42,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-04-29 03:55:42,401 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-04-29 03:55:42,421 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-04-29 03:55:42,422 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-04-29 03:55:42,422 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-04-29 03:55:42,444 INFO L202 PluginConnector]: Adding new model PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.04 03:55:42 BasicIcfg [2021-04-29 03:55:42,444 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-29 03:55:42,446 INFO L168 Benchmark]: Toolchain (without parser) took 2186.64 ms. Allocated memory was 302.0 MB in the beginning and 375.4 MB in the end (delta: 73.4 MB). Free memory was 269.2 MB in the beginning and 350.2 MB in the end (delta: -81.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-29 03:55:42,447 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.68 ms. Allocated memory is still 302.0 MB. Free memory is still 270.2 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-04-29 03:55:42,449 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.37 ms. Allocated memory is still 302.0 MB. Free memory was 284.4 MB in the beginning and 282.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-29 03:55:42,450 INFO L168 Benchmark]: Boogie Preprocessor took 20.29 ms. Allocated memory is still 302.0 MB. Free memory was 282.9 MB in the beginning and 282.0 MB in the end (delta: 881.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-04-29 03:55:42,453 INFO L168 Benchmark]: RCFGBuilder took 297.52 ms. Allocated memory is still 302.0 MB. Free memory was 281.8 MB in the beginning and 279.1 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-04-29 03:55:42,460 INFO L168 Benchmark]: TraceAbstraction took 1772.03 ms. Allocated memory was 302.0 MB in the beginning and 375.4 MB in the end (delta: 73.4 MB). Free memory was 278.7 MB in the beginning and 350.2 MB in the end (delta: -71.6 MB). Peak memory consumption was 4.1 MB. Max. memory is 16.0 GB. [2021-04-29 03:55:42,466 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 0.68 ms. Allocated memory is still 302.0 MB. Free memory is still 270.2 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 40.37 ms. Allocated memory is still 302.0 MB. Free memory was 284.4 MB in the beginning and 282.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 20.29 ms. Allocated memory is still 302.0 MB. Free memory was 282.9 MB in the beginning and 282.0 MB in the end (delta: 881.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 297.52 ms. Allocated memory is still 302.0 MB. Free memory was 281.8 MB in the beginning and 279.1 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * TraceAbstraction took 1772.03 ms. Allocated memory was 302.0 MB in the beginning and 375.4 MB in the end (delta: 73.4 MB). Free memory was 278.7 MB in the beginning and 350.2 MB in the end (delta: -71.6 MB). Peak memory consumption was 4.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 467.6ms, 29 PlacesBefore, 29 PlacesAfterwards, 24 TransitionsBefore, 24 TransitionsAfterwards, 260 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 6 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 6 TotalNumberOfCompositions, 528 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 222, positive: 182, positive conditional: 182, positive unconditional: 0, negative: 40, negative conditional: 40, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 157, positive: 137, positive conditional: 0, positive unconditional: 137, negative: 20, negative conditional: 0, negative unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 157, positive: 137, positive conditional: 0, positive unconditional: 137, negative: 20, negative conditional: 0, negative unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 157, positive: 116, positive conditional: 0, positive unconditional: 116, negative: 41, negative conditional: 0, negative unconditional: 41, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 41, positive: 21, positive conditional: 0, positive unconditional: 21, negative: 20, negative conditional: 0, negative unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 227, positive: 136, positive conditional: 0, positive unconditional: 136, negative: 91, negative conditional: 0, negative unconditional: 91, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 222, positive: 45, positive conditional: 45, positive unconditional: 0, negative: 20, negative conditional: 20, negative unconditional: 0, unknown: 157, unknown conditional: 157, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 157, Positive cache size: 137, Positive conditional cache size: 137, Positive unconditional cache size: 0, Negative cache size: 20, Negative conditional cache size: 20, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 103.5ms, 27 PlacesBefore, 27 PlacesAfterwards, 26 TransitionsBefore, 26 TransitionsAfterwards, 136 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, 115 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 49, positive: 37, positive conditional: 37, positive unconditional: 0, negative: 12, negative conditional: 12, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 21, positive: 19, positive conditional: 3, positive unconditional: 16, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 21, positive: 19, positive conditional: 3, positive unconditional: 16, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 21, positive: 17, positive conditional: 0, positive unconditional: 17, negative: 4, negative conditional: 0, negative unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 4, positive: 2, positive conditional: 0, positive unconditional: 2, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 37, positive: 17, positive conditional: 0, positive unconditional: 17, negative: 20, negative conditional: 0, negative unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 49, positive: 18, positive conditional: 18, positive unconditional: 0, negative: 10, negative conditional: 10, negative unconditional: 0, unknown: 21, unknown conditional: 21, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 178, Positive cache size: 156, Positive conditional cache size: 156, Positive unconditional cache size: 0, Negative cache size: 22, Negative conditional cache size: 22, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 44.2ms, 30 PlacesBefore, 30 PlacesAfterwards, 29 TransitionsBefore, 29 TransitionsAfterwards, 134 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, 27 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 6, positive: 3, positive conditional: 3, positive unconditional: 0, negative: 3, negative conditional: 3, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 1, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 1, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 5, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 5, negative conditional: 0, negative unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 6, positive: 3, positive conditional: 3, positive unconditional: 0, negative: 2, negative conditional: 2, negative unconditional: 0, unknown: 1, unknown conditional: 1, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 179, Positive cache size: 156, Positive conditional cache size: 156, Positive unconditional cache size: 0, Negative cache size: 23, Negative conditional cache size: 23, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 30.8ms, 34 PlacesBefore, 34 PlacesAfterwards, 32 TransitionsBefore, 32 TransitionsAfterwards, 130 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, 0 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 179, Positive cache size: 156, Positive conditional cache size: 156, Positive unconditional cache size: 0, Negative cache size: 23, Negative conditional cache size: 23, Negative unconditional cache size: 0 - 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] [L37] 1 turn := 1; VAL [critical=0, turn=1] [L27] FORK 0 fork 1 Process1(); VAL [critical=0, turn=1] [L56] 2 flag1 := 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; [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 CFG has 3 procedures, 25 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 8.1ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 1645.1ms, OverallIterations: 4, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 411.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 555.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 29 SDtfs, 7 SDslu, 3 SDs, 0 SdLazy, 22 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 63.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=158occurred 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: 13.0ms SsaConstructionTime, 47.8ms SatisfiabilityAnalysisTime, 201.0ms InterpolantComputationTime, 35 NumberOfCodeBlocks, 35 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 22 ConstructedInterpolants, 0 QuantifiedInterpolants, 50 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...