/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-RepeatedSemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/showcase/Peterson.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-25 17:49:13,590 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-25 17:49:13,592 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-25 17:49:13,626 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-25 17:49:13,681 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-25 17:49:13,682 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-25 17:49:13,683 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-25 17:49:13,685 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-RepeatedSemanticLbe.epf [2021-03-25 17:49:13,721 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-25 17:49:13,721 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-25 17:49:13,724 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-25 17:49:13,725 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-25 17:49:13,725 INFO L138 SettingsManager]: * Use SBE=true [2021-03-25 17:49:13,725 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-25 17:49:13,725 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-25 17:49:13,725 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-25 17:49:13,725 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-25 17:49:13,726 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-25 17:49:13,726 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-25 17:49:13,726 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-25 17:49:13,727 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-25 17:49:13,727 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-25 17:49:13,727 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-25 17:49:13,727 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-25 17:49:13,727 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-25 17:49:13,727 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-25 17:49:13,727 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-25 17:49:13,728 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-25 17:49:13,728 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-25 17:49:13,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-25 17:49:13,728 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-25 17:49:13,728 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-25 17:49:13,728 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-25 17:49:13,728 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-25 17:49:13,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-25 17:49:13,729 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-25 17:49:13,729 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-03-25 17:49:13,729 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-25 17:49:13,989 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-25 17:49:14,006 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-25 17:49:14,008 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-25 17:49:14,009 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-25 17:49:14,009 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-25 17:49:14,010 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/showcase/Peterson.bpl [2021-03-25 17:49:14,010 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/showcase/Peterson.bpl' [2021-03-25 17:49:14,048 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-25 17:49:14,050 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-25 17:49:14,051 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-25 17:49:14,051 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-25 17:49:14,051 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-25 17:49:14,062 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Peterson.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 05:49:14" (1/1) ... [2021-03-25 17:49:14,067 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Peterson.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 05:49:14" (1/1) ... [2021-03-25 17:49:14,075 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-25 17:49:14,077 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-25 17:49:14,077 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-25 17:49:14,077 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-25 17:49:14,083 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Peterson.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 05:49:14" (1/1) ... [2021-03-25 17:49:14,084 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Peterson.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 05:49:14" (1/1) ... [2021-03-25 17:49:14,084 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Peterson.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 05:49:14" (1/1) ... [2021-03-25 17:49:14,084 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Peterson.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 05:49:14" (1/1) ... [2021-03-25 17:49:14,087 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Peterson.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 05:49:14" (1/1) ... [2021-03-25 17:49:14,090 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Peterson.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 05:49:14" (1/1) ... [2021-03-25 17:49:14,090 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Peterson.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 05:49:14" (1/1) ... [2021-03-25 17:49:14,091 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-25 17:49:14,093 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-25 17:49:14,093 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-25 17:49:14,093 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-25 17:49:14,094 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Peterson.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 05:49:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-25 17:49:14,153 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Process0 given in one single declaration [2021-03-25 17:49:14,154 INFO L130 BoogieDeclarations]: Found specification of procedure Process0 [2021-03-25 17:49:14,154 INFO L138 BoogieDeclarations]: Found implementation of procedure Process0 [2021-03-25 17:49:14,154 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Process1 given in one single declaration [2021-03-25 17:49:14,154 INFO L130 BoogieDeclarations]: Found specification of procedure Process1 [2021-03-25 17:49:14,154 INFO L138 BoogieDeclarations]: Found implementation of procedure Process1 [2021-03-25 17:49:14,154 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-25 17:49:14,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-25 17:49:14,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-25 17:49:14,155 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-25 17:49:14,285 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-25 17:49:14,285 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-03-25 17:49:14,286 INFO L202 PluginConnector]: Adding new model Peterson.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.03 05:49:14 BoogieIcfgContainer [2021-03-25 17:49:14,287 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-25 17:49:14,288 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-25 17:49:14,288 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-25 17:49:14,290 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-25 17:49:14,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Peterson.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 05:49:14" (1/2) ... [2021-03-25 17:49:14,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75dd556c and model type Peterson.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.03 05:49:14, skipping insertion in model container [2021-03-25 17:49:14,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Peterson.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.03 05:49:14" (2/2) ... [2021-03-25 17:49:14,293 INFO L111 eAbstractionObserver]: Analyzing ICFG Peterson.bpl [2021-03-25 17:49:14,297 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-25 17:49:14,300 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-03-25 17:49:14,300 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-25 17:49:14,321 WARN L313 ript$VariableManager]: TermVariabe Process0Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:49:14,322 WARN L313 ript$VariableManager]: TermVariabe Process0Thread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:49:14,330 WARN L313 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:49:14,330 WARN L313 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 17:49:14,332 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-25 17:49:14,349 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-03-25 17:49:14,366 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-25 17:49:14,366 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-25 17:49:14,366 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-25 17:49:14,366 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-25 17:49:14,366 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-25 17:49:14,367 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-25 17:49:14,367 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-25 17:49:14,367 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-25 17:49:14,374 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 31 places, 26 transitions, 62 flow [2021-03-25 17:49:14,392 INFO L129 PetriNetUnfolder]: 2/24 cut-off events. [2021-03-25 17:49:14,392 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-25 17:49:14,395 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. [2021-03-25 17:49:14,395 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 26 transitions, 62 flow [2021-03-25 17:49:14,399 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 24 transitions, 54 flow [2021-03-25 17:49:14,400 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-25 17:49:14,411 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 29 places, 24 transitions, 54 flow [2021-03-25 17:49:14,414 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 29 places, 24 transitions, 54 flow [2021-03-25 17:49:14,415 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 29 places, 24 transitions, 54 flow [2021-03-25 17:49:14,422 INFO L129 PetriNetUnfolder]: 2/24 cut-off events. [2021-03-25 17:49:14,423 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-25 17:49:14,424 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 48 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. [2021-03-25 17:49:14,426 INFO L142 LiptonReduction]: Number of co-enabled transitions 260 [2021-03-25 17:49:14,531 INFO L154 LiptonReduction]: Checked pairs total: 107 [2021-03-25 17:49:14,531 INFO L156 LiptonReduction]: Total number of compositions: 4 [2021-03-25 17:49:14,533 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 134 [2021-03-25 17:49:14,543 INFO L129 PetriNetUnfolder]: 0/13 cut-off events. [2021-03-25 17:49:14,543 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-25 17:49:14,543 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 17:49:14,544 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-25 17:49:14,544 INFO L428 AbstractCegarLoop]: === Iteration 1 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-03-25 17:49:14,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 17:49:14,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1933706754, now seen corresponding path program 1 times [2021-03-25 17:49:14,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 17:49:14,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957135641] [2021-03-25 17:49:14,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 17:49:14,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 17:49:14,638 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:49:14,639 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 17:49:14,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 17:49:14,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957135641] [2021-03-25 17:49:14,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 17:49:14,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-25 17:49:14,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758864293] [2021-03-25 17:49:14,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-25 17:49:14,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 17:49:14,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-25 17:49:14,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-25 17:49:14,682 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 30 [2021-03-25 17:49:14,683 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 46 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) [2021-03-25 17:49:14,683 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 17:49:14,683 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 30 [2021-03-25 17:49:14,684 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 17:49:14,722 INFO L129 PetriNetUnfolder]: 19/64 cut-off events. [2021-03-25 17:49:14,722 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-25 17:49:14,723 INFO L84 FinitePrefix]: Finished finitePrefix Result has 112 conditions, 64 events. 19/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 150 event pairs, 1 based on Foata normal form. 12/73 useless extension candidates. Maximal degree in co-relation 103. Up to 26 conditions per place. [2021-03-25 17:49:14,732 INFO L132 encePairwiseOnDemand]: 19/30 looper letters, 8 selfloop transitions, 7 changer transitions 0/24 dead transitions. [2021-03-25 17:49:14,732 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 24 transitions, 84 flow [2021-03-25 17:49:14,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-25 17:49:14,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-25 17:49:14,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 66 transitions. [2021-03-25 17:49:14,741 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7333333333333333 [2021-03-25 17:49:14,741 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 66 transitions. [2021-03-25 17:49:14,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 66 transitions. [2021-03-25 17:49:14,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 17:49:14,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 66 transitions. [2021-03-25 17:49:14,746 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) [2021-03-25 17:49:14,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 17:49:14,752 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 17:49:14,754 INFO L185 Difference]: Start difference. First operand has 25 places, 20 transitions, 46 flow. Second operand 3 states and 66 transitions. [2021-03-25 17:49:14,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 24 transitions, 84 flow [2021-03-25 17:49:14,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 24 transitions, 82 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-25 17:49:14,761 INFO L241 Difference]: Finished difference. Result has 25 places, 24 transitions, 96 flow [2021-03-25 17:49:14,763 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=25, PETRI_TRANSITIONS=24} [2021-03-25 17:49:14,764 INFO L343 CegarLoopForPetriNet]: 25 programPoint places, 0 predicate places. [2021-03-25 17:49:14,764 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-25 17:49:14,764 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 25 places, 24 transitions, 96 flow [2021-03-25 17:49:14,769 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 25 places, 24 transitions, 96 flow [2021-03-25 17:49:14,771 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 25 places, 24 transitions, 96 flow [2021-03-25 17:49:14,795 INFO L129 PetriNetUnfolder]: 19/64 cut-off events. [2021-03-25 17:49:14,796 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-03-25 17:49:14,798 INFO L84 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 64 events. 19/64 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 153 event pairs, 1 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 124. Up to 26 conditions per place. [2021-03-25 17:49:14,801 INFO L142 LiptonReduction]: Number of co-enabled transitions 118 [2021-03-25 17:49:14,821 INFO L154 LiptonReduction]: Checked pairs total: 17 [2021-03-25 17:49:14,821 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 17:49:14,821 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 57 [2021-03-25 17:49:14,824 INFO L480 AbstractCegarLoop]: Abstraction has has 25 places, 24 transitions, 96 flow [2021-03-25 17:49:14,824 INFO L481 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) [2021-03-25 17:49:14,824 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 17:49:14,824 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 17:49:14,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-25 17:49:14,825 INFO L428 AbstractCegarLoop]: === Iteration 2 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-03-25 17:49:14,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 17:49:14,826 INFO L82 PathProgramCache]: Analyzing trace with hash -968737348, now seen corresponding path program 1 times [2021-03-25 17:49:14,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 17:49:14,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338563791] [2021-03-25 17:49:14,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 17:49:14,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 17:49:14,861 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:49:14,861 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 17:49:14,864 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:49:14,865 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 17:49:14,874 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:49:14,875 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:49:14,884 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:49:14,885 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 17:49:14,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 17:49:14,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338563791] [2021-03-25 17:49:14,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 17:49:14,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-25 17:49:14,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554802560] [2021-03-25 17:49:14,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-25 17:49:14,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 17:49:14,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-25 17:49:14,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-25 17:49:14,894 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 30 [2021-03-25 17:49:14,896 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 24 transitions, 96 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 17:49:14,896 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 17:49:14,897 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 30 [2021-03-25 17:49:14,897 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 17:49:14,948 INFO L129 PetriNetUnfolder]: 25/79 cut-off events. [2021-03-25 17:49:14,949 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2021-03-25 17:49:14,949 INFO L84 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 79 events. 25/79 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 207 event pairs, 3 based on Foata normal form. 5/83 useless extension candidates. Maximal degree in co-relation 185. Up to 29 conditions per place. [2021-03-25 17:49:14,950 INFO L132 encePairwiseOnDemand]: 25/30 looper letters, 6 selfloop transitions, 7 changer transitions 0/30 dead transitions. [2021-03-25 17:49:14,950 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 30 transitions, 140 flow [2021-03-25 17:49:14,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-25 17:49:14,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-25 17:49:14,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 88 transitions. [2021-03-25 17:49:14,958 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7333333333333333 [2021-03-25 17:49:14,958 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 88 transitions. [2021-03-25 17:49:14,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 88 transitions. [2021-03-25 17:49:14,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 17:49:14,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 88 transitions. [2021-03-25 17:49:14,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 17:49:14,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 30.0) internal successors, (150), 5 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 17:49:14,960 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 30.0) internal successors, (150), 5 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 17:49:14,960 INFO L185 Difference]: Start difference. First operand has 25 places, 24 transitions, 96 flow. Second operand 4 states and 88 transitions. [2021-03-25 17:49:14,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 30 transitions, 140 flow [2021-03-25 17:49:14,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 30 transitions, 124 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-25 17:49:14,962 INFO L241 Difference]: Finished difference. Result has 28 places, 28 transitions, 123 flow [2021-03-25 17:49:14,962 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=28, PETRI_TRANSITIONS=28} [2021-03-25 17:49:14,963 INFO L343 CegarLoopForPetriNet]: 25 programPoint places, 3 predicate places. [2021-03-25 17:49:14,973 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-25 17:49:14,973 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 28 places, 28 transitions, 123 flow [2021-03-25 17:49:14,974 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 28 places, 28 transitions, 123 flow [2021-03-25 17:49:14,974 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 28 places, 28 transitions, 123 flow [2021-03-25 17:49:14,993 INFO L129 PetriNetUnfolder]: 22/73 cut-off events. [2021-03-25 17:49:14,993 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2021-03-25 17:49:14,995 INFO L84 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 73 events. 22/73 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 183 event pairs, 2 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 158. Up to 29 conditions per place. [2021-03-25 17:49:14,997 INFO L142 LiptonReduction]: Number of co-enabled transitions 114 [2021-03-25 17:49:15,002 INFO L154 LiptonReduction]: Checked pairs total: 23 [2021-03-25 17:49:15,003 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 17:49:15,003 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 30 [2021-03-25 17:49:15,004 INFO L480 AbstractCegarLoop]: Abstraction has has 28 places, 28 transitions, 123 flow [2021-03-25 17:49:15,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 17:49:15,005 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 17:49:15,005 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-25 17:49:15,005 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-25 17:49:15,005 INFO L428 AbstractCegarLoop]: === Iteration 3 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-03-25 17:49:15,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 17:49:15,006 INFO L82 PathProgramCache]: Analyzing trace with hash -533317838, now seen corresponding path program 2 times [2021-03-25 17:49:15,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 17:49:15,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748488632] [2021-03-25 17:49:15,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 17:49:15,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 17:49:15,023 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:49:15,025 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 17:49:15,025 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:49:15,026 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 17:49:15,032 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:49:15,033 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 17:49:15,040 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 17:49:15,042 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 17:49:15,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 17:49:15,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748488632] [2021-03-25 17:49:15,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 17:49:15,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-25 17:49:15,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284151118] [2021-03-25 17:49:15,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-25 17:49:15,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 17:49:15,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-25 17:49:15,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-25 17:49:15,045 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 30 [2021-03-25 17:49:15,045 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 28 transitions, 123 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 17:49:15,045 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 17:49:15,045 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 30 [2021-03-25 17:49:15,045 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 17:49:15,068 INFO L129 PetriNetUnfolder]: 10/37 cut-off events. [2021-03-25 17:49:15,069 INFO L130 PetriNetUnfolder]: For 15/20 co-relation queries the response was YES. [2021-03-25 17:49:15,069 INFO L84 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 37 events. 10/37 cut-off events. For 15/20 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 82 event pairs, 0 based on Foata normal form. 5/41 useless extension candidates. Maximal degree in co-relation 95. Up to 12 conditions per place. [2021-03-25 17:49:15,069 INFO L132 encePairwiseOnDemand]: 25/30 looper letters, 0 selfloop transitions, 0 changer transitions 24/24 dead transitions. [2021-03-25 17:49:15,069 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 24 transitions, 127 flow [2021-03-25 17:49:15,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-25 17:49:15,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-25 17:49:15,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 88 transitions. [2021-03-25 17:49:15,074 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7333333333333333 [2021-03-25 17:49:15,075 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 88 transitions. [2021-03-25 17:49:15,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 88 transitions. [2021-03-25 17:49:15,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 17:49:15,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 88 transitions. [2021-03-25 17:49:15,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 17:49:15,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 30.0) internal successors, (150), 5 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 17:49:15,079 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 30.0) internal successors, (150), 5 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 17:49:15,079 INFO L185 Difference]: Start difference. First operand has 28 places, 28 transitions, 123 flow. Second operand 4 states and 88 transitions. [2021-03-25 17:49:15,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 24 transitions, 127 flow [2021-03-25 17:49:15,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 24 transitions, 106 flow, removed 2 selfloop flow, removed 3 redundant places. [2021-03-25 17:49:15,082 INFO L241 Difference]: Finished difference. Result has 26 places, 0 transitions, 0 flow [2021-03-25 17:49:15,083 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=26, PETRI_TRANSITIONS=0} [2021-03-25 17:49:15,083 INFO L343 CegarLoopForPetriNet]: 25 programPoint places, 1 predicate places. [2021-03-25 17:49:15,083 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-25 17:49:15,083 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 26 places, 0 transitions, 0 flow [2021-03-25 17:49:15,084 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 26 places, 0 transitions, 0 flow [2021-03-25 17:49:15,084 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 0 places, 0 transitions, 0 flow [2021-03-25 17:49:15,084 INFO L129 PetriNetUnfolder]: 0/0 cut-off events. [2021-03-25 17:49:15,084 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-25 17:49:15,085 INFO L84 FinitePrefix]: Finished finitePrefix Result has 0 conditions, 0 events. 0/0 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 0. Compared 0 event pairs, 0 based on Foata normal form. 0/0 useless extension candidates. Maximal degree in co-relation 0. Up to 0 conditions per place. [2021-03-25 17:49:15,085 INFO L142 LiptonReduction]: Number of co-enabled transitions 0 [2021-03-25 17:49:15,085 INFO L154 LiptonReduction]: Checked pairs total: 0 [2021-03-25 17:49:15,085 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 17:49:15,085 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 2 [2021-03-25 17:49:15,089 INFO L480 AbstractCegarLoop]: Abstraction has has 0 places, 0 transitions, 0 flow [2021-03-25 17:49:15,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 17:49:15,090 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-25 17:49:15,094 INFO L202 PluginConnector]: Adding new model Peterson.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.03 05:49:15 BasicIcfg [2021-03-25 17:49:15,094 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-25 17:49:15,095 INFO L168 Benchmark]: Toolchain (without parser) took 1044.79 ms. Allocated memory was 255.9 MB in the beginning and 343.9 MB in the end (delta: 88.1 MB). Free memory was 236.3 MB in the beginning and 316.4 MB in the end (delta: -80.1 MB). Peak memory consumption was 8.6 MB. Max. memory is 16.0 GB. [2021-03-25 17:49:15,096 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 237.4 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-25 17:49:15,097 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.31 ms. Allocated memory is still 255.9 MB. Free memory was 236.2 MB in the beginning and 234.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-25 17:49:15,097 INFO L168 Benchmark]: Boogie Preprocessor took 14.97 ms. Allocated memory is still 255.9 MB. Free memory was 234.8 MB in the beginning and 233.9 MB in the end (delta: 898.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-25 17:49:15,098 INFO L168 Benchmark]: RCFGBuilder took 194.04 ms. Allocated memory is still 255.9 MB. Free memory was 233.8 MB in the beginning and 239.0 MB in the end (delta: -5.2 MB). Peak memory consumption was 21.7 MB. Max. memory is 16.0 GB. [2021-03-25 17:49:15,100 INFO L168 Benchmark]: TraceAbstraction took 806.08 ms. Allocated memory was 255.9 MB in the beginning and 343.9 MB in the end (delta: 88.1 MB). Free memory was 238.6 MB in the beginning and 316.4 MB in the end (delta: -77.8 MB). Peak memory consumption was 10.1 MB. Max. memory is 16.0 GB. [2021-03-25 17:49:15,104 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 255.9 MB. Free memory is still 237.4 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 24.31 ms. Allocated memory is still 255.9 MB. Free memory was 236.2 MB in the beginning and 234.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.97 ms. Allocated memory is still 255.9 MB. Free memory was 234.8 MB in the beginning and 233.9 MB in the end (delta: 898.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 194.04 ms. Allocated memory is still 255.9 MB. Free memory was 233.8 MB in the beginning and 239.0 MB in the end (delta: -5.2 MB). Peak memory consumption was 21.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 806.08 ms. Allocated memory was 255.9 MB in the beginning and 343.9 MB in the end (delta: 88.1 MB). Free memory was 238.6 MB in the beginning and 316.4 MB in the end (delta: -77.8 MB). Peak memory consumption was 10.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 117.3ms, 29 PlacesBefore, 25 PlacesAfterwards, 24 TransitionsBefore, 20 TransitionsAfterwards, 260 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 4 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 4 TotalNumberOfCompositions, 107 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 73, positive: 67, positive conditional: 0, positive unconditional: 67, negative: 6, negative conditional: 0, negative unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 69, positive: 63, positive conditional: 0, positive unconditional: 63, negative: 6, negative conditional: 0, negative unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 69, positive: 63, positive conditional: 0, positive unconditional: 63, negative: 6, negative conditional: 0, negative unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 69, positive: 59, positive conditional: 0, positive unconditional: 59, negative: 10, negative conditional: 0, negative unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 10, positive: 4, positive conditional: 0, positive unconditional: 4, negative: 6, negative conditional: 0, negative unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 36, positive: 12, positive conditional: 0, positive unconditional: 12, negative: 24, negative conditional: 0, negative unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 73, positive: 4, positive conditional: 0, positive unconditional: 4, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 69, unknown conditional: 0, unknown unconditional: 69] , Statistics on independence cache: Total cache size (in pairs): 14, Positive cache size: 10, Positive conditional cache size: 0, Positive unconditional cache size: 10, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 52.4ms, 25 PlacesBefore, 25 PlacesAfterwards, 24 TransitionsBefore, 24 TransitionsAfterwards, 118 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, 17 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 15, positive: 13, positive conditional: 0, positive unconditional: 13, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 13, positive: 11, positive conditional: 0, positive unconditional: 11, 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: 13, positive: 11, positive conditional: 0, positive unconditional: 11, 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: 13, positive: 11, positive conditional: 0, positive unconditional: 11, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 2, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 14, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 14, negative conditional: 0, negative unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 15, positive: 2, positive conditional: 0, positive unconditional: 2, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 13, unknown conditional: 0, unknown unconditional: 13] , Statistics on independence cache: Total cache size (in pairs): 27, Positive cache size: 21, Positive conditional cache size: 0, Positive unconditional cache size: 21, Negative cache size: 6, Negative conditional cache size: 0, Negative unconditional cache size: 6 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 29.2ms, 28 PlacesBefore, 28 PlacesAfterwards, 28 TransitionsBefore, 28 TransitionsAfterwards, 114 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, 23 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 14, positive: 11, positive conditional: 0, positive unconditional: 11, negative: 3, negative conditional: 0, negative unconditional: 3, 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: 14, positive: 11, positive conditional: 0, positive unconditional: 11, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 27, Positive cache size: 21, Positive conditional cache size: 0, Positive unconditional cache size: 21, Negative cache size: 6, Negative conditional cache size: 0, Negative unconditional cache size: 6 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.2ms, 26 PlacesBefore, 0 PlacesAfterwards, 0 TransitionsBefore, 0 TransitionsAfterwards, 0 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): 27, Positive cache size: 21, Positive conditional cache size: 0, Positive unconditional cache size: 21, Negative cache size: 6, Negative conditional cache size: 0, Negative unconditional cache size: 6 - PositiveResult [Line: 37]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 54]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 25 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 5.3ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 727.8ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 197.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 170.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 27 SDtfs, 8 SDslu, 2 SDs, 0 SdLazy, 26 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 33.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=123occurred in iteration=2, 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: 7.3ms SsaConstructionTime, 15.8ms SatisfiabilityAnalysisTime, 119.7ms InterpolantComputationTime, 30 NumberOfCodeBlocks, 30 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 27 ConstructedInterpolants, 0 QuantifiedInterpolants, 67 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 - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...