/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-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/fork_loop_noop.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-24 22:14:19,650 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-24 22:14:19,652 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-24 22:14:19,691 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-24 22:14:19,747 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-SemanticLbe.epf [2021-03-24 22:14:19,782 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-24 22:14:19,782 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-24 22:14:19,785 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-24 22:14:19,785 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-24 22:14:19,786 INFO L138 SettingsManager]: * Use SBE=true [2021-03-24 22:14:19,786 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-24 22:14:19,786 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-24 22:14:19,786 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-24 22:14:19,786 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-24 22:14:19,786 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-24 22:14:19,787 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-24 22:14:19,787 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-24 22:14:19,787 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-24 22:14:19,787 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-24 22:14:19,787 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-24 22:14:19,787 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-24 22:14:19,788 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-24 22:14:19,788 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-24 22:14:19,788 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-24 22:14:19,788 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-24 22:14:19,788 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-24 22:14:19,788 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-24 22:14:19,788 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-24 22:14:19,788 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-24 22:14:19,789 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-24 22:14:19,789 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-24 22:14:19,789 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-24 22:14:19,789 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-24 22:14:19,789 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-24 22:14:20,065 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-24 22:14:20,093 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-24 22:14:20,094 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-24 22:14:20,095 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-24 22:14:20,111 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-24 22:14:20,111 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_noop.bpl [2021-03-24 22:14:20,112 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_noop.bpl' [2021-03-24 22:14:20,126 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-24 22:14:20,127 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-24 22:14:20,128 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-24 22:14:20,128 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-24 22:14:20,128 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-24 22:14:20,138 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:14:20" (1/1) ... [2021-03-24 22:14:20,142 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:14:20" (1/1) ... [2021-03-24 22:14:20,148 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-24 22:14:20,149 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-24 22:14:20,149 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-24 22:14:20,149 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-24 22:14:20,155 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:14:20" (1/1) ... [2021-03-24 22:14:20,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:14:20" (1/1) ... [2021-03-24 22:14:20,156 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:14:20" (1/1) ... [2021-03-24 22:14:20,156 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:14:20" (1/1) ... [2021-03-24 22:14:20,157 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:14:20" (1/1) ... [2021-03-24 22:14:20,159 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:14:20" (1/1) ... [2021-03-24 22:14:20,160 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:14:20" (1/1) ... [2021-03-24 22:14:20,160 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-24 22:14:20,161 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-24 22:14:20,161 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-24 22:14:20,161 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-24 22:14:20,162 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:14:20" (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 [2021-03-24 22:14:20,233 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-24 22:14:20,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-24 22:14:20,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-24 22:14:20,233 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread given in one single declaration [2021-03-24 22:14:20,233 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2021-03-24 22:14:20,233 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2021-03-24 22:14:20,234 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-24 22:14:20,333 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-24 22:14:20,333 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-03-24 22:14:20,334 INFO L202 PluginConnector]: Adding new model fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 10:14:20 BoogieIcfgContainer [2021-03-24 22:14:20,334 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-24 22:14:20,336 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-24 22:14:20,336 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-24 22:14:20,338 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-24 22:14:20,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:14:20" (1/2) ... [2021-03-24 22:14:20,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cba346f and model type fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.03 10:14:20, skipping insertion in model container [2021-03-24 22:14:20,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 10:14:20" (2/2) ... [2021-03-24 22:14:20,340 INFO L111 eAbstractionObserver]: Analyzing ICFG fork_loop_noop.bpl [2021-03-24 22:14:20,344 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-24 22:14:20,347 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-24 22:14:20,347 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-24 22:14:20,364 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:14:20,378 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:14:20,395 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:14:20,395 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:14:20,395 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:14:20,395 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:14:20,395 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:14:20,395 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:14:20,396 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:14:20,396 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:14:20,402 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 11 places, 8 transitions, 21 flow [2021-03-24 22:14:20,415 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2021-03-24 22:14:20,415 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:20,417 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16 conditions, 11 events. 0/11 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 19 event pairs, 0 based on Foata normal form. 0/9 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-24 22:14:20,417 INFO L82 GeneralOperation]: Start removeDead. Operand has 11 places, 8 transitions, 21 flow [2021-03-24 22:14:20,419 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 9 places, 6 transitions, 17 flow [2021-03-24 22:14:20,420 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:14:20,431 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 9 places, 6 transitions, 17 flow [2021-03-24 22:14:20,434 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 9 places, 6 transitions, 17 flow [2021-03-24 22:14:20,434 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 9 places, 6 transitions, 17 flow [2021-03-24 22:14:20,437 INFO L129 PetriNetUnfolder]: 0/7 cut-off events. [2021-03-24 22:14:20,437 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:20,437 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12 conditions, 7 events. 0/7 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 8 event pairs, 0 based on Foata normal form. 0/7 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-24 22:14:20,438 INFO L142 LiptonReduction]: Number of co-enabled transitions 8 [2021-03-24 22:14:20,459 INFO L154 LiptonReduction]: Checked pairs total: 2 [2021-03-24 22:14:20,459 INFO L156 LiptonReduction]: Total number of compositions: 1 [2021-03-24 22:14:20,461 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 41 [2021-03-24 22:14:20,468 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:14:20,468 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:20,468 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:20,468 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:14:20,469 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:20,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:20,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1315, now seen corresponding path program 1 times [2021-03-24 22:14:20,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:20,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654419291] [2021-03-24 22:14:20,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:20,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:14:20,560 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:14:20,561 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:14:20,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:14:20,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654419291] [2021-03-24 22:14:20,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:14:20,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:14:20,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837274293] [2021-03-24 22:14:20,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:14:20,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:14:20,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:14:20,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:14:20,591 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 9 [2021-03-24 22:14:20,592 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 8 places, 5 transitions, 15 flow. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2021-03-24 22:14:20,593 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:14:20,593 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 9 [2021-03-24 22:14:20,594 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:14:20,598 INFO L129 PetriNetUnfolder]: 0/4 cut-off events. [2021-03-24 22:14:20,598 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:20,598 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11 conditions, 4 events. 0/4 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 1 event pairs, 0 based on Foata normal form. 2/6 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-24 22:14:20,599 INFO L132 encePairwiseOnDemand]: 7/9 looper letters, 0 selfloop transitions, 1 changer transitions 0/4 dead transitions. [2021-03-24 22:14:20,599 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 9 places, 4 transitions, 15 flow [2021-03-24 22:14:20,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:14:20,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:14:20,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 20 transitions. [2021-03-24 22:14:20,607 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7407407407407407 [2021-03-24 22:14:20,607 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 20 transitions. [2021-03-24 22:14:20,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 20 transitions. [2021-03-24 22:14:20,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:14:20,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 20 transitions. [2021-03-24 22:14:20,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2021-03-24 22:14:20,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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) [2021-03-24 22:14:20,614 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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) [2021-03-24 22:14:20,615 INFO L185 Difference]: Start difference. First operand has 8 places, 5 transitions, 15 flow. Second operand 3 states and 20 transitions. [2021-03-24 22:14:20,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 9 places, 4 transitions, 15 flow [2021-03-24 22:14:20,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 9 places, 4 transitions, 15 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-03-24 22:14:20,618 INFO L241 Difference]: Finished difference. Result has 9 places, 4 transitions, 15 flow [2021-03-24 22:14:20,619 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=9, PETRI_DIFFERENCE_MINUEND_FLOW=13, PETRI_DIFFERENCE_MINUEND_PLACES=7, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=15, PETRI_PLACES=9, PETRI_TRANSITIONS=4} [2021-03-24 22:14:20,620 INFO L343 CegarLoopForPetriNet]: 8 programPoint places, 1 predicate places. [2021-03-24 22:14:20,620 INFO L480 AbstractCegarLoop]: Abstraction has has 9 places, 4 transitions, 15 flow [2021-03-24 22:14:20,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2021-03-24 22:14:20,620 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:20,621 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2021-03-24 22:14:20,621 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-24 22:14:20,621 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:20,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:20,622 INFO L82 PathProgramCache]: Analyzing trace with hash 41033, now seen corresponding path program 1 times [2021-03-24 22:14:20,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:20,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800192534] [2021-03-24 22:14:20,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:20,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:20,625 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:20,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:20,628 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:20,637 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:14:20,637 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:14:20,638 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-24 22:14:20,639 WARN L342 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:14:20,639 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-03-24 22:14:20,645 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:14:20,646 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:14:20,647 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:14:20,647 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:14:20,648 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:14:20,648 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:14:20,648 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:14:20,648 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:14:20,648 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:14:20,648 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:14:20,649 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 16 places, 11 transitions, 34 flow [2021-03-24 22:14:20,652 INFO L129 PetriNetUnfolder]: 0/17 cut-off events. [2021-03-24 22:14:20,652 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:20,652 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 17 events. 0/17 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 38 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-03-24 22:14:20,652 INFO L82 GeneralOperation]: Start removeDead. Operand has 16 places, 11 transitions, 34 flow [2021-03-24 22:14:20,653 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 14 places, 9 transitions, 30 flow [2021-03-24 22:14:20,653 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:14:20,653 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 14 places, 9 transitions, 30 flow [2021-03-24 22:14:20,654 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 14 places, 9 transitions, 30 flow [2021-03-24 22:14:20,654 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 14 places, 9 transitions, 30 flow [2021-03-24 22:14:20,656 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2021-03-24 22:14:20,656 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:20,656 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21 conditions, 11 events. 0/11 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 11 event pairs, 0 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-03-24 22:14:20,657 INFO L142 LiptonReduction]: Number of co-enabled transitions 28 [2021-03-24 22:14:20,726 INFO L154 LiptonReduction]: Checked pairs total: 9 [2021-03-24 22:14:20,726 INFO L156 LiptonReduction]: Total number of compositions: 2 [2021-03-24 22:14:20,726 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 73 [2021-03-24 22:14:20,728 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-03-24 22:14:20,728 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:20,728 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:20,728 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:14:20,728 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:20,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:20,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1699, now seen corresponding path program 1 times [2021-03-24 22:14:20,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:20,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42696042] [2021-03-24 22:14:20,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:20,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:14:20,734 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:14:20,735 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:14:20,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:14:20,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42696042] [2021-03-24 22:14:20,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:14:20,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:14:20,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543998808] [2021-03-24 22:14:20,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:14:20,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:14:20,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:14:20,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:14:20,757 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 13 [2021-03-24 22:14:20,758 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 7 transitions, 26 flow. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2021-03-24 22:14:20,758 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:14:20,758 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 13 [2021-03-24 22:14:20,758 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:14:20,760 INFO L129 PetriNetUnfolder]: 0/6 cut-off events. [2021-03-24 22:14:20,760 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:20,760 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18 conditions, 6 events. 0/6 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 2 event pairs, 0 based on Foata normal form. 3/9 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-03-24 22:14:20,760 INFO L132 encePairwiseOnDemand]: 11/13 looper letters, 0 selfloop transitions, 1 changer transitions 0/6 dead transitions. [2021-03-24 22:14:20,760 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 13 places, 6 transitions, 26 flow [2021-03-24 22:14:20,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:14:20,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:14:20,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 32 transitions. [2021-03-24 22:14:20,761 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8205128205128205 [2021-03-24 22:14:20,761 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 32 transitions. [2021-03-24 22:14:20,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 32 transitions. [2021-03-24 22:14:20,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:14:20,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 32 transitions. [2021-03-24 22:14:20,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2021-03-24 22:14:20,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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) [2021-03-24 22:14:20,763 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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) [2021-03-24 22:14:20,763 INFO L185 Difference]: Start difference. First operand has 12 places, 7 transitions, 26 flow. Second operand 3 states and 32 transitions. [2021-03-24 22:14:20,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 13 places, 6 transitions, 26 flow [2021-03-24 22:14:20,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 13 places, 6 transitions, 24 flow, removed 1 selfloop flow, removed 0 redundant places. [2021-03-24 22:14:20,764 INFO L241 Difference]: Finished difference. Result has 13 places, 6 transitions, 24 flow [2021-03-24 22:14:20,764 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=13, PETRI_DIFFERENCE_MINUEND_FLOW=22, PETRI_DIFFERENCE_MINUEND_PLACES=11, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=24, PETRI_PLACES=13, PETRI_TRANSITIONS=6} [2021-03-24 22:14:20,764 INFO L343 CegarLoopForPetriNet]: 12 programPoint places, 1 predicate places. [2021-03-24 22:14:20,764 INFO L480 AbstractCegarLoop]: Abstraction has has 13 places, 6 transitions, 24 flow [2021-03-24 22:14:20,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2021-03-24 22:14:20,764 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:20,764 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2021-03-24 22:14:20,765 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-24 22:14:20,765 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:20,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:20,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1643499, now seen corresponding path program 1 times [2021-03-24 22:14:20,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:20,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69175326] [2021-03-24 22:14:20,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:20,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:20,768 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:20,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:20,770 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:20,771 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:14:20,783 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:14:20,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-24 22:14:20,784 WARN L342 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:14:20,785 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2021-03-24 22:14:20,800 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:14:20,800 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:14:20,801 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:14:20,801 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:14:20,801 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:14:20,802 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:14:20,802 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:14:20,802 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:14:20,802 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:14:20,802 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:14:20,802 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 21 places, 14 transitions, 49 flow [2021-03-24 22:14:20,806 INFO L129 PetriNetUnfolder]: 0/23 cut-off events. [2021-03-24 22:14:20,806 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:20,806 INFO L84 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 23 events. 0/23 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 65 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-03-24 22:14:20,806 INFO L82 GeneralOperation]: Start removeDead. Operand has 21 places, 14 transitions, 49 flow [2021-03-24 22:14:20,807 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 19 places, 12 transitions, 45 flow [2021-03-24 22:14:20,807 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:14:20,807 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 19 places, 12 transitions, 45 flow [2021-03-24 22:14:20,807 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 19 places, 12 transitions, 45 flow [2021-03-24 22:14:20,808 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 19 places, 12 transitions, 45 flow [2021-03-24 22:14:20,810 INFO L129 PetriNetUnfolder]: 0/15 cut-off events. [2021-03-24 22:14:20,810 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:20,811 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31 conditions, 15 events. 0/15 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 23 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-03-24 22:14:20,811 INFO L142 LiptonReduction]: Number of co-enabled transitions 60 [2021-03-24 22:14:20,869 INFO L154 LiptonReduction]: Checked pairs total: 21 [2021-03-24 22:14:20,869 INFO L156 LiptonReduction]: Total number of compositions: 3 [2021-03-24 22:14:20,869 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 62 [2021-03-24 22:14:20,871 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-03-24 22:14:20,871 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:20,871 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:20,872 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:14:20,872 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:20,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:20,872 INFO L82 PathProgramCache]: Analyzing trace with hash 2211, now seen corresponding path program 1 times [2021-03-24 22:14:20,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:20,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978115844] [2021-03-24 22:14:20,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:20,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:14:20,878 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:14:20,878 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:14:20,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:14:20,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978115844] [2021-03-24 22:14:20,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:14:20,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:14:20,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022856003] [2021-03-24 22:14:20,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:14:20,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:14:20,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:14:20,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:14:20,885 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 17 [2021-03-24 22:14:20,885 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 16 places, 9 transitions, 39 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2021-03-24 22:14:20,885 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:14:20,886 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 17 [2021-03-24 22:14:20,886 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:14:20,888 INFO L129 PetriNetUnfolder]: 0/8 cut-off events. [2021-03-24 22:14:20,888 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:20,889 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 8 events. 0/8 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 3 event pairs, 0 based on Foata normal form. 4/12 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-03-24 22:14:20,889 INFO L132 encePairwiseOnDemand]: 15/17 looper letters, 0 selfloop transitions, 1 changer transitions 0/8 dead transitions. [2021-03-24 22:14:20,889 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 8 transitions, 39 flow [2021-03-24 22:14:20,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:14:20,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:14:20,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 44 transitions. [2021-03-24 22:14:20,890 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8627450980392157 [2021-03-24 22:14:20,890 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 44 transitions. [2021-03-24 22:14:20,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 44 transitions. [2021-03-24 22:14:20,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:14:20,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 44 transitions. [2021-03-24 22:14:20,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2021-03-24 22:14:20,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 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) [2021-03-24 22:14:20,892 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 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) [2021-03-24 22:14:20,892 INFO L185 Difference]: Start difference. First operand has 16 places, 9 transitions, 39 flow. Second operand 3 states and 44 transitions. [2021-03-24 22:14:20,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 8 transitions, 39 flow [2021-03-24 22:14:20,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 8 transitions, 33 flow, removed 3 selfloop flow, removed 0 redundant places. [2021-03-24 22:14:20,893 INFO L241 Difference]: Finished difference. Result has 17 places, 8 transitions, 33 flow [2021-03-24 22:14:20,894 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=31, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=33, PETRI_PLACES=17, PETRI_TRANSITIONS=8} [2021-03-24 22:14:20,894 INFO L343 CegarLoopForPetriNet]: 16 programPoint places, 1 predicate places. [2021-03-24 22:14:20,894 INFO L480 AbstractCegarLoop]: Abstraction has has 17 places, 8 transitions, 33 flow [2021-03-24 22:14:20,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2021-03-24 22:14:20,894 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:20,894 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-03-24 22:14:20,894 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-24 22:14:20,895 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:20,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:20,895 INFO L82 PathProgramCache]: Analyzing trace with hash 66279044, now seen corresponding path program 1 times [2021-03-24 22:14:20,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:20,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599937349] [2021-03-24 22:14:20,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:20,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:20,899 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:20,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:20,901 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:20,903 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:14:20,903 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:14:20,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-24 22:14:20,903 WARN L342 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:14:20,904 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2021-03-24 22:14:20,914 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:14:20,914 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:14:20,915 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:14:20,915 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:14:20,915 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:14:20,915 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:14:20,915 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:14:20,916 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:14:20,916 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:14:20,916 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:14:20,917 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 26 places, 17 transitions, 66 flow [2021-03-24 22:14:20,922 INFO L129 PetriNetUnfolder]: 0/29 cut-off events. [2021-03-24 22:14:20,922 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:20,922 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 29 events. 0/29 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 91 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2021-03-24 22:14:20,923 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 17 transitions, 66 flow [2021-03-24 22:14:20,923 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 15 transitions, 62 flow [2021-03-24 22:14:20,923 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:14:20,923 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 24 places, 15 transitions, 62 flow [2021-03-24 22:14:20,924 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 24 places, 15 transitions, 62 flow [2021-03-24 22:14:20,924 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 24 places, 15 transitions, 62 flow [2021-03-24 22:14:20,927 INFO L129 PetriNetUnfolder]: 0/19 cut-off events. [2021-03-24 22:14:20,927 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:20,927 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 19 events. 0/19 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 29 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2021-03-24 22:14:20,928 INFO L142 LiptonReduction]: Number of co-enabled transitions 104 [2021-03-24 22:14:21,000 INFO L154 LiptonReduction]: Checked pairs total: 38 [2021-03-24 22:14:21,001 INFO L156 LiptonReduction]: Total number of compositions: 4 [2021-03-24 22:14:21,001 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 78 [2021-03-24 22:14:21,002 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-03-24 22:14:21,002 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:21,003 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:21,003 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:14:21,003 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:21,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:21,003 INFO L82 PathProgramCache]: Analyzing trace with hash 2851, now seen corresponding path program 1 times [2021-03-24 22:14:21,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:21,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112672286] [2021-03-24 22:14:21,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:21,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:14:21,008 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:14:21,009 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:14:21,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:14:21,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112672286] [2021-03-24 22:14:21,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:14:21,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:14:21,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586929739] [2021-03-24 22:14:21,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:14:21,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:14:21,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:14:21,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:14:21,013 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 21 [2021-03-24 22:14:21,014 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 11 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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) [2021-03-24 22:14:21,014 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:14:21,014 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 21 [2021-03-24 22:14:21,014 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:14:21,017 INFO L129 PetriNetUnfolder]: 0/10 cut-off events. [2021-03-24 22:14:21,017 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:21,017 INFO L84 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 10 events. 0/10 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 6 event pairs, 0 based on Foata normal form. 5/15 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2021-03-24 22:14:21,017 INFO L132 encePairwiseOnDemand]: 19/21 looper letters, 0 selfloop transitions, 1 changer transitions 0/10 dead transitions. [2021-03-24 22:14:21,017 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 10 transitions, 54 flow [2021-03-24 22:14:21,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:14:21,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:14:21,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 56 transitions. [2021-03-24 22:14:21,018 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8888888888888888 [2021-03-24 22:14:21,018 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 56 transitions. [2021-03-24 22:14:21,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 56 transitions. [2021-03-24 22:14:21,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:14:21,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 56 transitions. [2021-03-24 22:14:21,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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) [2021-03-24 22:14:21,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:14:21,020 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:14:21,021 INFO L185 Difference]: Start difference. First operand has 20 places, 11 transitions, 54 flow. Second operand 3 states and 56 transitions. [2021-03-24 22:14:21,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 10 transitions, 54 flow [2021-03-24 22:14:21,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 10 transitions, 42 flow, removed 6 selfloop flow, removed 0 redundant places. [2021-03-24 22:14:21,022 INFO L241 Difference]: Finished difference. Result has 21 places, 10 transitions, 42 flow [2021-03-24 22:14:21,022 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=42, PETRI_PLACES=21, PETRI_TRANSITIONS=10} [2021-03-24 22:14:21,022 INFO L343 CegarLoopForPetriNet]: 20 programPoint places, 1 predicate places. [2021-03-24 22:14:21,022 INFO L480 AbstractCegarLoop]: Abstraction has has 21 places, 10 transitions, 42 flow [2021-03-24 22:14:21,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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) [2021-03-24 22:14:21,023 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:21,023 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-24 22:14:21,023 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-24 22:14:21,023 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:21,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:21,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1646739026, now seen corresponding path program 1 times [2021-03-24 22:14:21,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:21,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437298455] [2021-03-24 22:14:21,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:21,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:21,028 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:21,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:21,030 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:21,031 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:14:21,031 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:14:21,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-24 22:14:21,032 WARN L342 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:14:21,032 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2021-03-24 22:14:21,040 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:14:21,040 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:14:21,041 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:14:21,041 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:14:21,041 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:14:21,042 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:14:21,042 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:14:21,042 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:14:21,042 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:14:21,042 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:14:21,043 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 31 places, 20 transitions, 85 flow [2021-03-24 22:14:21,048 INFO L129 PetriNetUnfolder]: 0/35 cut-off events. [2021-03-24 22:14:21,048 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:21,048 INFO L84 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 35 events. 0/35 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 111 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2021-03-24 22:14:21,048 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 20 transitions, 85 flow [2021-03-24 22:14:21,049 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 18 transitions, 81 flow [2021-03-24 22:14:21,049 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:14:21,049 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 29 places, 18 transitions, 81 flow [2021-03-24 22:14:21,050 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 29 places, 18 transitions, 81 flow [2021-03-24 22:14:21,050 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 29 places, 18 transitions, 81 flow [2021-03-24 22:14:21,053 INFO L129 PetriNetUnfolder]: 0/23 cut-off events. [2021-03-24 22:14:21,054 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:21,054 INFO L84 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 23 events. 0/23 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 54 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2021-03-24 22:14:21,054 INFO L142 LiptonReduction]: Number of co-enabled transitions 160 [2021-03-24 22:14:21,131 INFO L154 LiptonReduction]: Checked pairs total: 60 [2021-03-24 22:14:21,131 INFO L156 LiptonReduction]: Total number of compositions: 5 [2021-03-24 22:14:21,132 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 83 [2021-03-24 22:14:21,133 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:14:21,134 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:21,134 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:21,134 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:14:21,134 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:21,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:21,134 INFO L82 PathProgramCache]: Analyzing trace with hash 3619, now seen corresponding path program 1 times [2021-03-24 22:14:21,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:21,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067270530] [2021-03-24 22:14:21,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:21,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:14:21,139 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:14:21,140 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:14:21,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:14:21,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067270530] [2021-03-24 22:14:21,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:14:21,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:14:21,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150818593] [2021-03-24 22:14:21,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:14:21,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:14:21,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:14:21,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:14:21,144 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 25 [2021-03-24 22:14:21,145 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 13 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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) [2021-03-24 22:14:21,145 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:14:21,145 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 25 [2021-03-24 22:14:21,145 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:14:21,148 INFO L129 PetriNetUnfolder]: 0/12 cut-off events. [2021-03-24 22:14:21,149 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:21,149 INFO L84 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 12 events. 0/12 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 7 event pairs, 0 based on Foata normal form. 6/18 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2021-03-24 22:14:21,149 INFO L132 encePairwiseOnDemand]: 23/25 looper letters, 0 selfloop transitions, 1 changer transitions 0/12 dead transitions. [2021-03-24 22:14:21,149 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 12 transitions, 71 flow [2021-03-24 22:14:21,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:14:21,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:14:21,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2021-03-24 22:14:21,150 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9066666666666666 [2021-03-24 22:14:21,150 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 68 transitions. [2021-03-24 22:14:21,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 68 transitions. [2021-03-24 22:14:21,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:14:21,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 68 transitions. [2021-03-24 22:14:21,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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) [2021-03-24 22:14:21,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 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) [2021-03-24 22:14:21,152 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 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) [2021-03-24 22:14:21,152 INFO L185 Difference]: Start difference. First operand has 24 places, 13 transitions, 71 flow. Second operand 3 states and 68 transitions. [2021-03-24 22:14:21,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 12 transitions, 71 flow [2021-03-24 22:14:21,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 12 transitions, 51 flow, removed 10 selfloop flow, removed 0 redundant places. [2021-03-24 22:14:21,154 INFO L241 Difference]: Finished difference. Result has 25 places, 12 transitions, 51 flow [2021-03-24 22:14:21,154 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=51, PETRI_PLACES=25, PETRI_TRANSITIONS=12} [2021-03-24 22:14:21,155 INFO L343 CegarLoopForPetriNet]: 24 programPoint places, 1 predicate places. [2021-03-24 22:14:21,155 INFO L480 AbstractCegarLoop]: Abstraction has has 25 places, 12 transitions, 51 flow [2021-03-24 22:14:21,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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) [2021-03-24 22:14:21,155 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:21,155 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:14:21,155 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-24 22:14:21,155 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:21,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:21,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1085119695, now seen corresponding path program 1 times [2021-03-24 22:14:21,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:21,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692247640] [2021-03-24 22:14:21,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:21,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:21,159 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:21,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:21,162 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:21,163 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:14:21,163 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:14:21,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-03-24 22:14:21,164 WARN L342 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:14:21,164 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2021-03-24 22:14:21,173 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:14:21,173 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:14:21,174 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:14:21,174 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:14:21,174 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:14:21,174 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:14:21,174 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:14:21,174 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:14:21,174 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:14:21,174 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:14:21,175 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 36 places, 23 transitions, 106 flow [2021-03-24 22:14:21,180 INFO L129 PetriNetUnfolder]: 0/41 cut-off events. [2021-03-24 22:14:21,180 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:21,180 INFO L84 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 41 events. 0/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 136 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2021-03-24 22:14:21,180 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 23 transitions, 106 flow [2021-03-24 22:14:21,181 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 21 transitions, 102 flow [2021-03-24 22:14:21,181 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:14:21,181 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 34 places, 21 transitions, 102 flow [2021-03-24 22:14:21,182 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 34 places, 21 transitions, 102 flow [2021-03-24 22:14:21,182 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 34 places, 21 transitions, 102 flow [2021-03-24 22:14:21,185 INFO L129 PetriNetUnfolder]: 0/27 cut-off events. [2021-03-24 22:14:21,185 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:21,185 INFO L84 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 27 events. 0/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 59 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2021-03-24 22:14:21,186 INFO L142 LiptonReduction]: Number of co-enabled transitions 228 [2021-03-24 22:14:21,330 INFO L154 LiptonReduction]: Checked pairs total: 87 [2021-03-24 22:14:21,330 INFO L156 LiptonReduction]: Total number of compositions: 6 [2021-03-24 22:14:21,330 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 149 [2021-03-24 22:14:21,331 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-03-24 22:14:21,332 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:21,332 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:21,332 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:14:21,332 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:21,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:21,332 INFO L82 PathProgramCache]: Analyzing trace with hash 4515, now seen corresponding path program 1 times [2021-03-24 22:14:21,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:21,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206854186] [2021-03-24 22:14:21,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:21,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:14:21,337 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:14:21,338 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:14:21,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:14:21,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206854186] [2021-03-24 22:14:21,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:14:21,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:14:21,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546251315] [2021-03-24 22:14:21,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:14:21,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:14:21,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:14:21,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:14:21,342 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 29 [2021-03-24 22:14:21,343 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 15 transitions, 90 flow. Second operand has 3 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) [2021-03-24 22:14:21,343 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:14:21,343 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 29 [2021-03-24 22:14:21,343 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:14:21,345 INFO L129 PetriNetUnfolder]: 0/14 cut-off events. [2021-03-24 22:14:21,346 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:21,346 INFO L84 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 14 events. 0/14 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs, 0 based on Foata normal form. 7/21 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2021-03-24 22:14:21,346 INFO L132 encePairwiseOnDemand]: 27/29 looper letters, 0 selfloop transitions, 1 changer transitions 0/14 dead transitions. [2021-03-24 22:14:21,346 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 14 transitions, 90 flow [2021-03-24 22:14:21,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:14:21,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:14:21,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2021-03-24 22:14:21,347 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9195402298850575 [2021-03-24 22:14:21,347 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 80 transitions. [2021-03-24 22:14:21,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 80 transitions. [2021-03-24 22:14:21,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:14:21,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 80 transitions. [2021-03-24 22:14:21,348 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) [2021-03-24 22:14:21,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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) [2021-03-24 22:14:21,349 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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) [2021-03-24 22:14:21,349 INFO L185 Difference]: Start difference. First operand has 28 places, 15 transitions, 90 flow. Second operand 3 states and 80 transitions. [2021-03-24 22:14:21,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 14 transitions, 90 flow [2021-03-24 22:14:21,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 14 transitions, 60 flow, removed 15 selfloop flow, removed 0 redundant places. [2021-03-24 22:14:21,351 INFO L241 Difference]: Finished difference. Result has 29 places, 14 transitions, 60 flow [2021-03-24 22:14:21,351 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=60, PETRI_PLACES=29, PETRI_TRANSITIONS=14} [2021-03-24 22:14:21,351 INFO L343 CegarLoopForPetriNet]: 28 programPoint places, 1 predicate places. [2021-03-24 22:14:21,351 INFO L480 AbstractCegarLoop]: Abstraction has has 29 places, 14 transitions, 60 flow [2021-03-24 22:14:21,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 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) [2021-03-24 22:14:21,351 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:21,351 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:14:21,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-03-24 22:14:21,352 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:21,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:21,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1719135375, now seen corresponding path program 1 times [2021-03-24 22:14:21,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:21,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739139791] [2021-03-24 22:14:21,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:21,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:21,356 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:21,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:21,358 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:21,359 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:14:21,359 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:14:21,360 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-03-24 22:14:21,360 WARN L342 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:14:21,360 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2021-03-24 22:14:21,369 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:14:21,369 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:14:21,370 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:14:21,370 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:14:21,370 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:14:21,370 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:14:21,371 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:14:21,371 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:14:21,371 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:14:21,371 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:14:21,372 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 41 places, 26 transitions, 129 flow [2021-03-24 22:14:21,376 INFO L129 PetriNetUnfolder]: 0/47 cut-off events. [2021-03-24 22:14:21,376 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:21,377 INFO L84 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 47 events. 0/47 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 166 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 0. Up to 8 conditions per place. [2021-03-24 22:14:21,377 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 26 transitions, 129 flow [2021-03-24 22:14:21,377 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 24 transitions, 125 flow [2021-03-24 22:14:21,377 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:14:21,377 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 39 places, 24 transitions, 125 flow [2021-03-24 22:14:21,378 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 39 places, 24 transitions, 125 flow [2021-03-24 22:14:21,378 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 39 places, 24 transitions, 125 flow [2021-03-24 22:14:21,381 INFO L129 PetriNetUnfolder]: 0/31 cut-off events. [2021-03-24 22:14:21,381 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:21,381 INFO L84 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 31 events. 0/31 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 86 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 0. Up to 8 conditions per place. [2021-03-24 22:14:21,382 INFO L142 LiptonReduction]: Number of co-enabled transitions 308 [2021-03-24 22:14:21,546 INFO L154 LiptonReduction]: Checked pairs total: 119 [2021-03-24 22:14:21,547 INFO L156 LiptonReduction]: Total number of compositions: 7 [2021-03-24 22:14:21,547 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 170 [2021-03-24 22:14:21,549 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-03-24 22:14:21,549 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:21,549 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:21,549 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:14:21,550 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:21,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:21,551 INFO L82 PathProgramCache]: Analyzing trace with hash 5539, now seen corresponding path program 1 times [2021-03-24 22:14:21,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:21,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250235617] [2021-03-24 22:14:21,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:21,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:14:21,568 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:14:21,570 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:14:21,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:14:21,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250235617] [2021-03-24 22:14:21,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:14:21,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:14:21,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655813802] [2021-03-24 22:14:21,575 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:14:21,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:14:21,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:14:21,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:14:21,577 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 33 [2021-03-24 22:14:21,577 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 17 transitions, 111 flow. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 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) [2021-03-24 22:14:21,577 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:14:21,577 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 33 [2021-03-24 22:14:21,577 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:14:21,583 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2021-03-24 22:14:21,583 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:21,583 INFO L84 FinitePrefix]: Finished finitePrefix Result has 68 conditions, 16 events. 0/16 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 13 event pairs, 0 based on Foata normal form. 8/24 useless extension candidates. Maximal degree in co-relation 0. Up to 8 conditions per place. [2021-03-24 22:14:21,583 INFO L132 encePairwiseOnDemand]: 31/33 looper letters, 0 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2021-03-24 22:14:21,583 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 16 transitions, 111 flow [2021-03-24 22:14:21,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:14:21,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:14:21,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 92 transitions. [2021-03-24 22:14:21,587 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9292929292929293 [2021-03-24 22:14:21,587 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 92 transitions. [2021-03-24 22:14:21,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 92 transitions. [2021-03-24 22:14:21,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:14:21,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 92 transitions. [2021-03-24 22:14:21,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 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) [2021-03-24 22:14:21,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 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) [2021-03-24 22:14:21,596 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 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) [2021-03-24 22:14:21,596 INFO L185 Difference]: Start difference. First operand has 32 places, 17 transitions, 111 flow. Second operand 3 states and 92 transitions. [2021-03-24 22:14:21,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 16 transitions, 111 flow [2021-03-24 22:14:21,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 16 transitions, 69 flow, removed 21 selfloop flow, removed 0 redundant places. [2021-03-24 22:14:21,598 INFO L241 Difference]: Finished difference. Result has 33 places, 16 transitions, 69 flow [2021-03-24 22:14:21,598 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=33, PETRI_TRANSITIONS=16} [2021-03-24 22:14:21,598 INFO L343 CegarLoopForPetriNet]: 32 programPoint places, 1 predicate places. [2021-03-24 22:14:21,598 INFO L480 AbstractCegarLoop]: Abstraction has has 33 places, 16 transitions, 69 flow [2021-03-24 22:14:21,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 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) [2021-03-24 22:14:21,598 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:21,599 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:14:21,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-03-24 22:14:21,599 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:21,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:21,599 INFO L82 PathProgramCache]: Analyzing trace with hash 779611434, now seen corresponding path program 1 times [2021-03-24 22:14:21,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:21,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742485664] [2021-03-24 22:14:21,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:21,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:21,603 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:21,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:21,606 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:21,614 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:14:21,614 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:14:21,614 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-03-24 22:14:21,614 WARN L342 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:14:21,615 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2021-03-24 22:14:21,629 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:14:21,629 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:14:21,630 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:14:21,630 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:14:21,630 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:14:21,630 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:14:21,630 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:14:21,630 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:14:21,631 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:14:21,631 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:14:21,633 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 46 places, 29 transitions, 154 flow [2021-03-24 22:14:21,642 INFO L129 PetriNetUnfolder]: 0/53 cut-off events. [2021-03-24 22:14:21,642 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:21,643 INFO L84 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 53 events. 0/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 191 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2021-03-24 22:14:21,643 INFO L82 GeneralOperation]: Start removeDead. Operand has 46 places, 29 transitions, 154 flow [2021-03-24 22:14:21,644 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 27 transitions, 150 flow [2021-03-24 22:14:21,644 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:14:21,644 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 44 places, 27 transitions, 150 flow [2021-03-24 22:14:21,644 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 44 places, 27 transitions, 150 flow [2021-03-24 22:14:21,644 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 44 places, 27 transitions, 150 flow [2021-03-24 22:14:21,650 INFO L129 PetriNetUnfolder]: 0/35 cut-off events. [2021-03-24 22:14:21,650 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:21,650 INFO L84 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 35 events. 0/35 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 73 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2021-03-24 22:14:21,651 INFO L142 LiptonReduction]: Number of co-enabled transitions 400 [2021-03-24 22:14:21,805 INFO L154 LiptonReduction]: Checked pairs total: 156 [2021-03-24 22:14:21,806 INFO L156 LiptonReduction]: Total number of compositions: 8 [2021-03-24 22:14:21,806 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 162 [2021-03-24 22:14:21,809 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-03-24 22:14:21,809 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:21,809 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:21,809 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:14:21,810 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:21,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:21,810 INFO L82 PathProgramCache]: Analyzing trace with hash 6691, now seen corresponding path program 1 times [2021-03-24 22:14:21,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:21,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362977960] [2021-03-24 22:14:21,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:21,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:14:21,821 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:14:21,822 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:14:21,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:14:21,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362977960] [2021-03-24 22:14:21,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:14:21,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:14:21,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11542148] [2021-03-24 22:14:21,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:14:21,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:14:21,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:14:21,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:14:21,827 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 37 [2021-03-24 22:14:21,827 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 19 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:14:21,828 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:14:21,828 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 37 [2021-03-24 22:14:21,828 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:14:21,833 INFO L129 PetriNetUnfolder]: 0/18 cut-off events. [2021-03-24 22:14:21,833 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:21,833 INFO L84 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 18 events. 0/18 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 16 event pairs, 0 based on Foata normal form. 9/27 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2021-03-24 22:14:21,834 INFO L132 encePairwiseOnDemand]: 35/37 looper letters, 0 selfloop transitions, 1 changer transitions 0/18 dead transitions. [2021-03-24 22:14:21,834 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 18 transitions, 134 flow [2021-03-24 22:14:21,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:14:21,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:14:21,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 104 transitions. [2021-03-24 22:14:21,835 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9369369369369369 [2021-03-24 22:14:21,835 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 104 transitions. [2021-03-24 22:14:21,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 104 transitions. [2021-03-24 22:14:21,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:14:21,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 104 transitions. [2021-03-24 22:14:21,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:14:21,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 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) [2021-03-24 22:14:21,837 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 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) [2021-03-24 22:14:21,837 INFO L185 Difference]: Start difference. First operand has 36 places, 19 transitions, 134 flow. Second operand 3 states and 104 transitions. [2021-03-24 22:14:21,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 18 transitions, 134 flow [2021-03-24 22:14:21,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 18 transitions, 78 flow, removed 28 selfloop flow, removed 0 redundant places. [2021-03-24 22:14:21,844 INFO L241 Difference]: Finished difference. Result has 37 places, 18 transitions, 78 flow [2021-03-24 22:14:21,844 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=37, PETRI_TRANSITIONS=18} [2021-03-24 22:14:21,844 INFO L343 CegarLoopForPetriNet]: 36 programPoint places, 1 predicate places. [2021-03-24 22:14:21,844 INFO L480 AbstractCegarLoop]: Abstraction has has 37 places, 18 transitions, 78 flow [2021-03-24 22:14:21,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:14:21,844 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:21,844 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:14:21,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-03-24 22:14:21,844 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:21,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:21,845 INFO L82 PathProgramCache]: Analyzing trace with hash -2053304524, now seen corresponding path program 1 times [2021-03-24 22:14:21,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:21,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393279409] [2021-03-24 22:14:21,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:21,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:21,849 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:21,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:21,852 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:21,854 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:14:21,854 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:14:21,854 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-03-24 22:14:21,854 WARN L342 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:14:21,855 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2021-03-24 22:14:21,865 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:14:21,865 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:14:21,866 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:14:21,866 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:14:21,866 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:14:21,867 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:14:21,867 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:14:21,867 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:14:21,867 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:14:21,867 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:14:21,867 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 51 places, 32 transitions, 181 flow [2021-03-24 22:14:21,871 INFO L129 PetriNetUnfolder]: 0/59 cut-off events. [2021-03-24 22:14:21,872 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:21,872 INFO L84 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 59 events. 0/59 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 212 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 0. Up to 10 conditions per place. [2021-03-24 22:14:21,872 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 32 transitions, 181 flow [2021-03-24 22:14:21,872 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 30 transitions, 177 flow [2021-03-24 22:14:21,872 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:14:21,873 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 49 places, 30 transitions, 177 flow [2021-03-24 22:14:21,873 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 49 places, 30 transitions, 177 flow [2021-03-24 22:14:21,873 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 49 places, 30 transitions, 177 flow [2021-03-24 22:14:21,876 INFO L129 PetriNetUnfolder]: 0/39 cut-off events. [2021-03-24 22:14:21,876 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:21,876 INFO L84 FinitePrefix]: Finished finitePrefix Result has 112 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 100 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 0. Up to 10 conditions per place. [2021-03-24 22:14:21,877 INFO L142 LiptonReduction]: Number of co-enabled transitions 504 [2021-03-24 22:14:22,066 INFO L154 LiptonReduction]: Checked pairs total: 198 [2021-03-24 22:14:22,066 INFO L156 LiptonReduction]: Total number of compositions: 9 [2021-03-24 22:14:22,066 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 194 [2021-03-24 22:14:22,071 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:14:22,071 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:22,071 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:22,071 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:14:22,071 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:22,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:22,071 INFO L82 PathProgramCache]: Analyzing trace with hash 7971, now seen corresponding path program 1 times [2021-03-24 22:14:22,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:22,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761866117] [2021-03-24 22:14:22,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:22,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:14:22,086 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:14:22,086 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:14:22,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:14:22,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761866117] [2021-03-24 22:14:22,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:14:22,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:14:22,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650447554] [2021-03-24 22:14:22,089 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:14:22,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:14:22,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:14:22,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:14:22,090 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 41 [2021-03-24 22:14:22,090 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 21 transitions, 159 flow. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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) [2021-03-24 22:14:22,090 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:14:22,090 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 41 [2021-03-24 22:14:22,090 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:14:22,093 INFO L129 PetriNetUnfolder]: 0/20 cut-off events. [2021-03-24 22:14:22,093 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:22,093 INFO L84 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 20 events. 0/20 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 13 event pairs, 0 based on Foata normal form. 10/30 useless extension candidates. Maximal degree in co-relation 0. Up to 10 conditions per place. [2021-03-24 22:14:22,093 INFO L132 encePairwiseOnDemand]: 39/41 looper letters, 0 selfloop transitions, 1 changer transitions 0/20 dead transitions. [2021-03-24 22:14:22,094 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 20 transitions, 159 flow [2021-03-24 22:14:22,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:14:22,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:14:22,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 116 transitions. [2021-03-24 22:14:22,095 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.943089430894309 [2021-03-24 22:14:22,095 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 116 transitions. [2021-03-24 22:14:22,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 116 transitions. [2021-03-24 22:14:22,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:14:22,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 116 transitions. [2021-03-24 22:14:22,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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) [2021-03-24 22:14:22,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 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) [2021-03-24 22:14:22,096 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 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) [2021-03-24 22:14:22,097 INFO L185 Difference]: Start difference. First operand has 40 places, 21 transitions, 159 flow. Second operand 3 states and 116 transitions. [2021-03-24 22:14:22,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 20 transitions, 159 flow [2021-03-24 22:14:22,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 20 transitions, 87 flow, removed 36 selfloop flow, removed 0 redundant places. [2021-03-24 22:14:22,099 INFO L241 Difference]: Finished difference. Result has 41 places, 20 transitions, 87 flow [2021-03-24 22:14:22,099 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=41, PETRI_TRANSITIONS=20} [2021-03-24 22:14:22,099 INFO L343 CegarLoopForPetriNet]: 40 programPoint places, 1 predicate places. [2021-03-24 22:14:22,099 INFO L480 AbstractCegarLoop]: Abstraction has has 41 places, 20 transitions, 87 flow [2021-03-24 22:14:22,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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) [2021-03-24 22:14:22,099 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:22,100 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:14:22,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-03-24 22:14:22,100 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:22,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:22,100 INFO L82 PathProgramCache]: Analyzing trace with hash -607272555, now seen corresponding path program 1 times [2021-03-24 22:14:22,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:22,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927786070] [2021-03-24 22:14:22,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:22,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:22,115 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:22,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:22,117 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:22,118 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:14:22,118 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:14:22,119 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-03-24 22:14:22,119 WARN L342 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:14:22,119 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2021-03-24 22:14:22,144 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:14:22,144 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:14:22,145 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:14:22,145 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:14:22,145 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:14:22,145 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:14:22,145 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:14:22,145 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:14:22,145 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:14:22,146 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:14:22,146 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 56 places, 35 transitions, 210 flow [2021-03-24 22:14:22,150 INFO L129 PetriNetUnfolder]: 0/65 cut-off events. [2021-03-24 22:14:22,150 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:22,150 INFO L84 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 65 events. 0/65 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 234 event pairs, 0 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2021-03-24 22:14:22,151 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 35 transitions, 210 flow [2021-03-24 22:14:22,151 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 33 transitions, 206 flow [2021-03-24 22:14:22,151 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:14:22,151 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 54 places, 33 transitions, 206 flow [2021-03-24 22:14:22,151 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 54 places, 33 transitions, 206 flow [2021-03-24 22:14:22,152 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 54 places, 33 transitions, 206 flow [2021-03-24 22:14:22,154 INFO L129 PetriNetUnfolder]: 0/43 cut-off events. [2021-03-24 22:14:22,155 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:22,155 INFO L84 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 43 events. 0/43 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 110 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2021-03-24 22:14:22,159 INFO L142 LiptonReduction]: Number of co-enabled transitions 620 [2021-03-24 22:14:22,393 INFO L154 LiptonReduction]: Checked pairs total: 245 [2021-03-24 22:14:22,393 INFO L156 LiptonReduction]: Total number of compositions: 10 [2021-03-24 22:14:22,393 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 242 [2021-03-24 22:14:22,394 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-03-24 22:14:22,394 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:22,394 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:22,394 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:14:22,395 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:22,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:22,395 INFO L82 PathProgramCache]: Analyzing trace with hash 9379, now seen corresponding path program 1 times [2021-03-24 22:14:22,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:22,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872840105] [2021-03-24 22:14:22,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:22,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:14:22,403 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:14:22,403 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:14:22,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:14:22,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872840105] [2021-03-24 22:14:22,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:14:22,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:14:22,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527326193] [2021-03-24 22:14:22,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:14:22,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:14:22,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:14:22,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:14:22,408 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 45 [2021-03-24 22:14:22,408 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 23 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 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) [2021-03-24 22:14:22,408 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:14:22,408 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 45 [2021-03-24 22:14:22,408 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:14:22,413 INFO L129 PetriNetUnfolder]: 0/22 cut-off events. [2021-03-24 22:14:22,414 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:22,414 INFO L84 FinitePrefix]: Finished finitePrefix Result has 110 conditions, 22 events. 0/22 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 11/33 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2021-03-24 22:14:22,414 INFO L132 encePairwiseOnDemand]: 43/45 looper letters, 0 selfloop transitions, 1 changer transitions 0/22 dead transitions. [2021-03-24 22:14:22,414 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 22 transitions, 186 flow [2021-03-24 22:14:22,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:14:22,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:14:22,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 128 transitions. [2021-03-24 22:14:22,415 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9481481481481482 [2021-03-24 22:14:22,415 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 128 transitions. [2021-03-24 22:14:22,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 128 transitions. [2021-03-24 22:14:22,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:14:22,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 128 transitions. [2021-03-24 22:14:22,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 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) [2021-03-24 22:14:22,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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) [2021-03-24 22:14:22,416 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 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) [2021-03-24 22:14:22,416 INFO L185 Difference]: Start difference. First operand has 44 places, 23 transitions, 186 flow. Second operand 3 states and 128 transitions. [2021-03-24 22:14:22,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 22 transitions, 186 flow [2021-03-24 22:14:22,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 22 transitions, 96 flow, removed 45 selfloop flow, removed 0 redundant places. [2021-03-24 22:14:22,419 INFO L241 Difference]: Finished difference. Result has 45 places, 22 transitions, 96 flow [2021-03-24 22:14:22,419 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=45, PETRI_TRANSITIONS=22} [2021-03-24 22:14:22,419 INFO L343 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2021-03-24 22:14:22,420 INFO L480 AbstractCegarLoop]: Abstraction has has 45 places, 22 transitions, 96 flow [2021-03-24 22:14:22,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 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) [2021-03-24 22:14:22,420 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:22,420 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:14:22,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-03-24 22:14:22,420 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:22,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:22,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1208304905, now seen corresponding path program 1 times [2021-03-24 22:14:22,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:22,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788536341] [2021-03-24 22:14:22,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:22,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:22,436 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:22,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:22,461 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:22,463 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:14:22,463 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:14:22,463 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-03-24 22:14:22,463 WARN L342 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:14:22,463 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2021-03-24 22:14:22,481 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:14:22,481 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:14:22,482 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:14:22,482 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:14:22,482 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:14:22,482 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:14:22,483 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:14:22,483 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:14:22,483 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:14:22,483 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:14:22,484 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 61 places, 38 transitions, 241 flow [2021-03-24 22:14:22,493 INFO L129 PetriNetUnfolder]: 0/71 cut-off events. [2021-03-24 22:14:22,493 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:22,493 INFO L84 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 71 events. 0/71 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 257 event pairs, 0 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2021-03-24 22:14:22,493 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 38 transitions, 241 flow [2021-03-24 22:14:22,494 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 59 places, 36 transitions, 237 flow [2021-03-24 22:14:22,494 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:14:22,494 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 36 transitions, 237 flow [2021-03-24 22:14:22,494 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 59 places, 36 transitions, 237 flow [2021-03-24 22:14:22,494 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 59 places, 36 transitions, 237 flow [2021-03-24 22:14:22,500 INFO L129 PetriNetUnfolder]: 0/47 cut-off events. [2021-03-24 22:14:22,500 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:22,500 INFO L84 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 47 events. 0/47 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 142 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2021-03-24 22:14:22,501 INFO L142 LiptonReduction]: Number of co-enabled transitions 748 [2021-03-24 22:14:22,775 INFO L154 LiptonReduction]: Checked pairs total: 297 [2021-03-24 22:14:22,775 INFO L156 LiptonReduction]: Total number of compositions: 11 [2021-03-24 22:14:22,775 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 281 [2021-03-24 22:14:22,778 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:14:22,778 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:22,778 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:22,778 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:14:22,778 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:22,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:22,779 INFO L82 PathProgramCache]: Analyzing trace with hash 10915, now seen corresponding path program 1 times [2021-03-24 22:14:22,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:22,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457422656] [2021-03-24 22:14:22,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:22,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:14:22,788 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:14:22,789 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:14:22,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:14:22,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457422656] [2021-03-24 22:14:22,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:14:22,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:14:22,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118519057] [2021-03-24 22:14:22,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:14:22,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:14:22,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:14:22,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:14:22,792 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 49 [2021-03-24 22:14:22,793 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 25 transitions, 215 flow. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 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) [2021-03-24 22:14:22,793 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:14:22,793 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 49 [2021-03-24 22:14:22,793 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:14:22,797 INFO L129 PetriNetUnfolder]: 0/24 cut-off events. [2021-03-24 22:14:22,797 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:22,797 INFO L84 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 24 events. 0/24 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 21 event pairs, 0 based on Foata normal form. 12/36 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2021-03-24 22:14:22,798 INFO L132 encePairwiseOnDemand]: 47/49 looper letters, 0 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2021-03-24 22:14:22,798 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 24 transitions, 215 flow [2021-03-24 22:14:22,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:14:22,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:14:22,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 140 transitions. [2021-03-24 22:14:22,798 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9523809523809523 [2021-03-24 22:14:22,799 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 140 transitions. [2021-03-24 22:14:22,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 140 transitions. [2021-03-24 22:14:22,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:14:22,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 140 transitions. [2021-03-24 22:14:22,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 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) [2021-03-24 22:14:22,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 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) [2021-03-24 22:14:22,800 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 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) [2021-03-24 22:14:22,800 INFO L185 Difference]: Start difference. First operand has 48 places, 25 transitions, 215 flow. Second operand 3 states and 140 transitions. [2021-03-24 22:14:22,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 24 transitions, 215 flow [2021-03-24 22:14:22,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 24 transitions, 105 flow, removed 55 selfloop flow, removed 0 redundant places. [2021-03-24 22:14:22,801 INFO L241 Difference]: Finished difference. Result has 49 places, 24 transitions, 105 flow [2021-03-24 22:14:22,801 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=49, PETRI_TRANSITIONS=24} [2021-03-24 22:14:22,802 INFO L343 CegarLoopForPetriNet]: 48 programPoint places, 1 predicate places. [2021-03-24 22:14:22,802 INFO L480 AbstractCegarLoop]: Abstraction has has 49 places, 24 transitions, 105 flow [2021-03-24 22:14:22,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 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) [2021-03-24 22:14:22,802 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:22,802 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:14:22,802 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-03-24 22:14:22,802 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:22,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:22,802 INFO L82 PathProgramCache]: Analyzing trace with hash 941462544, now seen corresponding path program 1 times [2021-03-24 22:14:22,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:22,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988384303] [2021-03-24 22:14:22,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:22,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:22,809 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:22,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:22,814 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:22,818 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:14:22,818 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:14:22,819 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-03-24 22:14:22,819 WARN L342 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:14:22,821 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2021-03-24 22:14:22,834 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:14:22,834 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:14:22,835 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:14:22,835 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:14:22,835 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:14:22,835 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:14:22,835 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:14:22,835 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:14:22,836 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:14:22,836 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:14:22,836 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 66 places, 41 transitions, 274 flow [2021-03-24 22:14:22,841 INFO L129 PetriNetUnfolder]: 0/77 cut-off events. [2021-03-24 22:14:22,841 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:22,841 INFO L84 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 77 events. 0/77 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 294 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2021-03-24 22:14:22,841 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 41 transitions, 274 flow [2021-03-24 22:14:22,842 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 64 places, 39 transitions, 270 flow [2021-03-24 22:14:22,842 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:14:22,842 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 64 places, 39 transitions, 270 flow [2021-03-24 22:14:22,842 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 64 places, 39 transitions, 270 flow [2021-03-24 22:14:22,843 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 64 places, 39 transitions, 270 flow [2021-03-24 22:14:22,846 INFO L129 PetriNetUnfolder]: 0/51 cut-off events. [2021-03-24 22:14:22,846 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:22,846 INFO L84 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 51 events. 0/51 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 153 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2021-03-24 22:14:22,847 INFO L142 LiptonReduction]: Number of co-enabled transitions 888 [2021-03-24 22:14:23,188 INFO L154 LiptonReduction]: Checked pairs total: 354 [2021-03-24 22:14:23,188 INFO L156 LiptonReduction]: Total number of compositions: 12 [2021-03-24 22:14:23,188 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 346 [2021-03-24 22:14:23,196 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:14:23,196 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:23,196 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:23,196 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:14:23,196 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:23,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:23,196 INFO L82 PathProgramCache]: Analyzing trace with hash 12579, now seen corresponding path program 1 times [2021-03-24 22:14:23,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:23,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836661241] [2021-03-24 22:14:23,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:23,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:14:23,201 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:14:23,201 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:14:23,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:14:23,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836661241] [2021-03-24 22:14:23,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:14:23,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:14:23,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312462850] [2021-03-24 22:14:23,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:14:23,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:14:23,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:14:23,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:14:23,204 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 53 [2021-03-24 22:14:23,205 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 27 transitions, 246 flow. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 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) [2021-03-24 22:14:23,205 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:14:23,205 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 53 [2021-03-24 22:14:23,205 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:14:23,208 INFO L129 PetriNetUnfolder]: 0/26 cut-off events. [2021-03-24 22:14:23,208 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:23,208 INFO L84 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 26 events. 0/26 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 22 event pairs, 0 based on Foata normal form. 13/39 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2021-03-24 22:14:23,208 INFO L132 encePairwiseOnDemand]: 51/53 looper letters, 0 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2021-03-24 22:14:23,209 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 26 transitions, 246 flow [2021-03-24 22:14:23,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:14:23,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:14:23,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 152 transitions. [2021-03-24 22:14:23,209 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9559748427672956 [2021-03-24 22:14:23,209 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 152 transitions. [2021-03-24 22:14:23,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 152 transitions. [2021-03-24 22:14:23,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:14:23,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 152 transitions. [2021-03-24 22:14:23,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 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) [2021-03-24 22:14:23,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 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) [2021-03-24 22:14:23,210 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 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) [2021-03-24 22:14:23,210 INFO L185 Difference]: Start difference. First operand has 52 places, 27 transitions, 246 flow. Second operand 3 states and 152 transitions. [2021-03-24 22:14:23,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 26 transitions, 246 flow [2021-03-24 22:14:23,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 26 transitions, 114 flow, removed 66 selfloop flow, removed 0 redundant places. [2021-03-24 22:14:23,213 INFO L241 Difference]: Finished difference. Result has 53 places, 26 transitions, 114 flow [2021-03-24 22:14:23,213 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=53, PETRI_TRANSITIONS=26} [2021-03-24 22:14:23,213 INFO L343 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2021-03-24 22:14:23,213 INFO L480 AbstractCegarLoop]: Abstraction has has 53 places, 26 transitions, 114 flow [2021-03-24 22:14:23,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 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) [2021-03-24 22:14:23,213 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:23,213 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:14:23,213 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-03-24 22:14:23,213 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:23,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:23,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1127292090, now seen corresponding path program 1 times [2021-03-24 22:14:23,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:23,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465021529] [2021-03-24 22:14:23,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:23,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:23,217 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:23,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:23,219 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:23,221 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:14:23,221 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:14:23,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-03-24 22:14:23,221 WARN L342 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:14:23,221 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2021-03-24 22:14:23,235 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:14:23,236 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:14:23,236 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:14:23,236 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:14:23,236 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:14:23,236 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:14:23,236 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:14:23,236 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:14:23,236 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:14:23,237 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:14:23,237 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 71 places, 44 transitions, 309 flow [2021-03-24 22:14:23,242 INFO L129 PetriNetUnfolder]: 0/83 cut-off events. [2021-03-24 22:14:23,242 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:23,242 INFO L84 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 83 events. 0/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 304 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 0. Up to 14 conditions per place. [2021-03-24 22:14:23,243 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 44 transitions, 309 flow [2021-03-24 22:14:23,243 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 42 transitions, 305 flow [2021-03-24 22:14:23,243 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:14:23,243 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 69 places, 42 transitions, 305 flow [2021-03-24 22:14:23,243 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 69 places, 42 transitions, 305 flow [2021-03-24 22:14:23,244 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 69 places, 42 transitions, 305 flow [2021-03-24 22:14:23,248 INFO L129 PetriNetUnfolder]: 0/55 cut-off events. [2021-03-24 22:14:23,248 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:23,248 INFO L84 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 55 events. 0/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 126 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 0. Up to 14 conditions per place. [2021-03-24 22:14:23,249 INFO L142 LiptonReduction]: Number of co-enabled transitions 1040 [2021-03-24 22:14:23,624 INFO L154 LiptonReduction]: Checked pairs total: 416 [2021-03-24 22:14:23,625 INFO L156 LiptonReduction]: Total number of compositions: 13 [2021-03-24 22:14:23,625 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 382 [2021-03-24 22:14:23,626 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-03-24 22:14:23,626 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:23,626 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:23,626 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:14:23,626 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:23,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:23,627 INFO L82 PathProgramCache]: Analyzing trace with hash 14371, now seen corresponding path program 1 times [2021-03-24 22:14:23,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:23,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324285070] [2021-03-24 22:14:23,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:23,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:14:23,631 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:14:23,632 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:14:23,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:14:23,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324285070] [2021-03-24 22:14:23,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:14:23,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:14:23,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452672268] [2021-03-24 22:14:23,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:14:23,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:14:23,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:14:23,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:14:23,636 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 57 [2021-03-24 22:14:23,636 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 29 transitions, 279 flow. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-03-24 22:14:23,636 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:14:23,636 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 57 [2021-03-24 22:14:23,636 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:14:23,640 INFO L129 PetriNetUnfolder]: 0/28 cut-off events. [2021-03-24 22:14:23,640 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:23,640 INFO L84 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 28 events. 0/28 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 23 event pairs, 0 based on Foata normal form. 14/42 useless extension candidates. Maximal degree in co-relation 0. Up to 14 conditions per place. [2021-03-24 22:14:23,641 INFO L132 encePairwiseOnDemand]: 55/57 looper letters, 0 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2021-03-24 22:14:23,641 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 28 transitions, 279 flow [2021-03-24 22:14:23,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:14:23,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:14:23,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 164 transitions. [2021-03-24 22:14:23,641 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9590643274853801 [2021-03-24 22:14:23,641 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 164 transitions. [2021-03-24 22:14:23,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 164 transitions. [2021-03-24 22:14:23,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:14:23,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 164 transitions. [2021-03-24 22:14:23,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-03-24 22:14:23,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 57.0) internal successors, (228), 4 states have internal predecessors, (228), 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) [2021-03-24 22:14:23,643 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 57.0) internal successors, (228), 4 states have internal predecessors, (228), 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) [2021-03-24 22:14:23,643 INFO L185 Difference]: Start difference. First operand has 56 places, 29 transitions, 279 flow. Second operand 3 states and 164 transitions. [2021-03-24 22:14:23,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 28 transitions, 279 flow [2021-03-24 22:14:23,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 28 transitions, 123 flow, removed 78 selfloop flow, removed 0 redundant places. [2021-03-24 22:14:23,645 INFO L241 Difference]: Finished difference. Result has 57 places, 28 transitions, 123 flow [2021-03-24 22:14:23,646 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=123, PETRI_PLACES=57, PETRI_TRANSITIONS=28} [2021-03-24 22:14:23,646 INFO L343 CegarLoopForPetriNet]: 56 programPoint places, 1 predicate places. [2021-03-24 22:14:23,646 INFO L480 AbstractCegarLoop]: Abstraction has has 57 places, 28 transitions, 123 flow [2021-03-24 22:14:23,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-03-24 22:14:23,646 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:23,646 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:14:23,646 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-03-24 22:14:23,646 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:23,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:23,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1451810459, now seen corresponding path program 1 times [2021-03-24 22:14:23,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:23,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482833946] [2021-03-24 22:14:23,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:23,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:23,651 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:23,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:23,653 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:23,655 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:14:23,655 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:14:23,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-03-24 22:14:23,655 WARN L342 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:14:23,655 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2021-03-24 22:14:23,672 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:14:23,672 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:14:23,673 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:14:23,673 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:14:23,673 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:14:23,673 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:14:23,673 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:14:23,673 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:14:23,673 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:14:23,673 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:14:23,674 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 76 places, 47 transitions, 346 flow [2021-03-24 22:14:23,680 INFO L129 PetriNetUnfolder]: 0/89 cut-off events. [2021-03-24 22:14:23,680 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:23,680 INFO L84 FinitePrefix]: Finished finitePrefix Result has 237 conditions, 89 events. 0/89 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 346 event pairs, 0 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2021-03-24 22:14:23,680 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 47 transitions, 346 flow [2021-03-24 22:14:23,681 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 45 transitions, 342 flow [2021-03-24 22:14:23,681 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:14:23,681 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 74 places, 45 transitions, 342 flow [2021-03-24 22:14:23,682 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 74 places, 45 transitions, 342 flow [2021-03-24 22:14:23,682 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 74 places, 45 transitions, 342 flow [2021-03-24 22:14:23,686 INFO L129 PetriNetUnfolder]: 0/59 cut-off events. [2021-03-24 22:14:23,686 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:23,686 INFO L84 FinitePrefix]: Finished finitePrefix Result has 207 conditions, 59 events. 0/59 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 167 event pairs, 0 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2021-03-24 22:14:23,688 INFO L142 LiptonReduction]: Number of co-enabled transitions 1204 [2021-03-24 22:14:24,093 INFO L154 LiptonReduction]: Checked pairs total: 483 [2021-03-24 22:14:24,093 INFO L156 LiptonReduction]: Total number of compositions: 14 [2021-03-24 22:14:24,093 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 412 [2021-03-24 22:14:24,094 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:14:24,094 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:24,094 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:24,095 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:14:24,095 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:24,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:24,095 INFO L82 PathProgramCache]: Analyzing trace with hash 16291, now seen corresponding path program 1 times [2021-03-24 22:14:24,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:24,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222495832] [2021-03-24 22:14:24,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:24,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:14:24,103 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:14:24,104 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:14:24,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:14:24,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222495832] [2021-03-24 22:14:24,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:14:24,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:14:24,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104494618] [2021-03-24 22:14:24,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:14:24,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:14:24,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:14:24,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:14:24,107 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 61 [2021-03-24 22:14:24,108 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 31 transitions, 314 flow. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 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) [2021-03-24 22:14:24,108 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:14:24,108 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 61 [2021-03-24 22:14:24,108 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:14:24,112 INFO L129 PetriNetUnfolder]: 0/30 cut-off events. [2021-03-24 22:14:24,112 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:24,112 INFO L84 FinitePrefix]: Finished finitePrefix Result has 180 conditions, 30 events. 0/30 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 32 event pairs, 0 based on Foata normal form. 15/45 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2021-03-24 22:14:24,112 INFO L132 encePairwiseOnDemand]: 59/61 looper letters, 0 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2021-03-24 22:14:24,112 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 30 transitions, 314 flow [2021-03-24 22:14:24,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:14:24,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:14:24,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 176 transitions. [2021-03-24 22:14:24,113 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9617486338797814 [2021-03-24 22:14:24,113 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 176 transitions. [2021-03-24 22:14:24,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 176 transitions. [2021-03-24 22:14:24,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:14:24,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 176 transitions. [2021-03-24 22:14:24,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 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) [2021-03-24 22:14:24,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 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) [2021-03-24 22:14:24,114 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 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) [2021-03-24 22:14:24,114 INFO L185 Difference]: Start difference. First operand has 60 places, 31 transitions, 314 flow. Second operand 3 states and 176 transitions. [2021-03-24 22:14:24,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 30 transitions, 314 flow [2021-03-24 22:14:24,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 30 transitions, 132 flow, removed 91 selfloop flow, removed 0 redundant places. [2021-03-24 22:14:24,118 INFO L241 Difference]: Finished difference. Result has 61 places, 30 transitions, 132 flow [2021-03-24 22:14:24,119 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=61, PETRI_TRANSITIONS=30} [2021-03-24 22:14:24,119 INFO L343 CegarLoopForPetriNet]: 60 programPoint places, 1 predicate places. [2021-03-24 22:14:24,119 INFO L480 AbstractCegarLoop]: Abstraction has has 61 places, 30 transitions, 132 flow [2021-03-24 22:14:24,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 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) [2021-03-24 22:14:24,119 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:24,119 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:14:24,119 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-03-24 22:14:24,119 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:24,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:24,120 INFO L82 PathProgramCache]: Analyzing trace with hash -138593667, now seen corresponding path program 1 times [2021-03-24 22:14:24,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:24,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758774378] [2021-03-24 22:14:24,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:24,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:24,132 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:24,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:24,138 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:24,140 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:14:24,140 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:14:24,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-03-24 22:14:24,141 WARN L342 ceAbstractionStarter]: 14 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:14:24,141 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 15 thread instances. [2021-03-24 22:14:24,158 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:14:24,158 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:14:24,159 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:14:24,159 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:14:24,159 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:14:24,159 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:14:24,159 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:14:24,159 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:14:24,159 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:14:24,159 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:14:24,160 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 81 places, 50 transitions, 385 flow [2021-03-24 22:14:24,168 INFO L129 PetriNetUnfolder]: 0/95 cut-off events. [2021-03-24 22:14:24,169 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:24,169 INFO L84 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 95 events. 0/95 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 296 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 0. Up to 16 conditions per place. [2021-03-24 22:14:24,169 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 50 transitions, 385 flow [2021-03-24 22:14:24,170 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 48 transitions, 381 flow [2021-03-24 22:14:24,170 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:14:24,170 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 79 places, 48 transitions, 381 flow [2021-03-24 22:14:24,170 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 79 places, 48 transitions, 381 flow [2021-03-24 22:14:24,170 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 79 places, 48 transitions, 381 flow [2021-03-24 22:14:24,175 INFO L129 PetriNetUnfolder]: 0/63 cut-off events. [2021-03-24 22:14:24,175 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:24,175 INFO L84 FinitePrefix]: Finished finitePrefix Result has 229 conditions, 63 events. 0/63 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 179 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 0. Up to 16 conditions per place. [2021-03-24 22:14:24,176 INFO L142 LiptonReduction]: Number of co-enabled transitions 1380 [2021-03-24 22:14:24,597 INFO L154 LiptonReduction]: Checked pairs total: 555 [2021-03-24 22:14:24,597 INFO L156 LiptonReduction]: Total number of compositions: 15 [2021-03-24 22:14:24,598 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 428 [2021-03-24 22:14:24,599 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:14:24,599 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:24,599 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:24,599 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:14:24,599 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:24,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:24,599 INFO L82 PathProgramCache]: Analyzing trace with hash 18339, now seen corresponding path program 1 times [2021-03-24 22:14:24,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:24,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777767607] [2021-03-24 22:14:24,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:24,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:14:24,607 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:14:24,608 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:14:24,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:14:24,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777767607] [2021-03-24 22:14:24,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:14:24,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:14:24,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621323463] [2021-03-24 22:14:24,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:14:24,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:14:24,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:14:24,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:14:24,611 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 65 [2021-03-24 22:14:24,611 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 33 transitions, 351 flow. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 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) [2021-03-24 22:14:24,612 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:14:24,612 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 65 [2021-03-24 22:14:24,612 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:14:24,640 INFO L129 PetriNetUnfolder]: 0/32 cut-off events. [2021-03-24 22:14:24,640 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:24,641 INFO L84 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 32 events. 0/32 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 27 event pairs, 0 based on Foata normal form. 16/48 useless extension candidates. Maximal degree in co-relation 0. Up to 16 conditions per place. [2021-03-24 22:14:24,641 INFO L132 encePairwiseOnDemand]: 63/65 looper letters, 0 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2021-03-24 22:14:24,641 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 32 transitions, 351 flow [2021-03-24 22:14:24,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:14:24,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:14:24,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 188 transitions. [2021-03-24 22:14:24,642 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9641025641025641 [2021-03-24 22:14:24,643 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 188 transitions. [2021-03-24 22:14:24,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 188 transitions. [2021-03-24 22:14:24,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:14:24,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 188 transitions. [2021-03-24 22:14:24,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 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) [2021-03-24 22:14:24,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 65.0) internal successors, (260), 4 states have internal predecessors, (260), 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) [2021-03-24 22:14:24,645 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 65.0) internal successors, (260), 4 states have internal predecessors, (260), 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) [2021-03-24 22:14:24,645 INFO L185 Difference]: Start difference. First operand has 64 places, 33 transitions, 351 flow. Second operand 3 states and 188 transitions. [2021-03-24 22:14:24,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 32 transitions, 351 flow [2021-03-24 22:14:24,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 32 transitions, 141 flow, removed 105 selfloop flow, removed 0 redundant places. [2021-03-24 22:14:24,652 INFO L241 Difference]: Finished difference. Result has 65 places, 32 transitions, 141 flow [2021-03-24 22:14:24,653 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=141, PETRI_PLACES=65, PETRI_TRANSITIONS=32} [2021-03-24 22:14:24,653 INFO L343 CegarLoopForPetriNet]: 64 programPoint places, 1 predicate places. [2021-03-24 22:14:24,653 INFO L480 AbstractCegarLoop]: Abstraction has has 65 places, 32 transitions, 141 flow [2021-03-24 22:14:24,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 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) [2021-03-24 22:14:24,653 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:24,653 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:14:24,653 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-03-24 22:14:24,653 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:24,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:24,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1465640138, now seen corresponding path program 1 times [2021-03-24 22:14:24,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:24,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136077320] [2021-03-24 22:14:24,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:24,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:24,664 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:24,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:24,665 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:24,672 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:14:24,672 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:14:24,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-03-24 22:14:24,673 WARN L342 ceAbstractionStarter]: 15 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:14:24,673 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 16 thread instances. [2021-03-24 22:14:24,693 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:14:24,694 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:14:24,694 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:14:24,694 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:14:24,694 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:14:24,694 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:14:24,694 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:14:24,694 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:14:24,694 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:14:24,695 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:14:24,695 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 86 places, 53 transitions, 426 flow [2021-03-24 22:14:24,703 INFO L129 PetriNetUnfolder]: 0/101 cut-off events. [2021-03-24 22:14:24,703 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:24,703 INFO L84 FinitePrefix]: Finished finitePrefix Result has 286 conditions, 101 events. 0/101 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 329 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 0. Up to 17 conditions per place. [2021-03-24 22:14:24,703 INFO L82 GeneralOperation]: Start removeDead. Operand has 86 places, 53 transitions, 426 flow [2021-03-24 22:14:24,704 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 51 transitions, 422 flow [2021-03-24 22:14:24,704 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:14:24,704 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 84 places, 51 transitions, 422 flow [2021-03-24 22:14:24,704 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 84 places, 51 transitions, 422 flow [2021-03-24 22:14:24,704 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 84 places, 51 transitions, 422 flow [2021-03-24 22:14:24,709 INFO L129 PetriNetUnfolder]: 0/67 cut-off events. [2021-03-24 22:14:24,709 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:24,709 INFO L84 FinitePrefix]: Finished finitePrefix Result has 252 conditions, 67 events. 0/67 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 175 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 0. Up to 17 conditions per place. [2021-03-24 22:14:24,711 INFO L142 LiptonReduction]: Number of co-enabled transitions 1568 [2021-03-24 22:14:25,167 INFO L154 LiptonReduction]: Checked pairs total: 632 [2021-03-24 22:14:25,167 INFO L156 LiptonReduction]: Total number of compositions: 16 [2021-03-24 22:14:25,167 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 463 [2021-03-24 22:14:25,171 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:14:25,171 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:25,171 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:25,171 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:14:25,171 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:25,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:25,171 INFO L82 PathProgramCache]: Analyzing trace with hash 20515, now seen corresponding path program 1 times [2021-03-24 22:14:25,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:25,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860910832] [2021-03-24 22:14:25,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:25,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:14:25,180 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:14:25,180 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:14:25,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:14:25,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860910832] [2021-03-24 22:14:25,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:14:25,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:14:25,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42829184] [2021-03-24 22:14:25,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:14:25,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:14:25,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:14:25,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:14:25,184 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 69 [2021-03-24 22:14:25,184 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 35 transitions, 390 flow. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 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) [2021-03-24 22:14:25,184 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:14:25,184 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 69 [2021-03-24 22:14:25,184 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:14:25,196 INFO L129 PetriNetUnfolder]: 0/34 cut-off events. [2021-03-24 22:14:25,197 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:25,197 INFO L84 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 34 events. 0/34 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 32 event pairs, 0 based on Foata normal form. 17/51 useless extension candidates. Maximal degree in co-relation 0. Up to 17 conditions per place. [2021-03-24 22:14:25,197 INFO L132 encePairwiseOnDemand]: 67/69 looper letters, 0 selfloop transitions, 1 changer transitions 0/34 dead transitions. [2021-03-24 22:14:25,197 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 34 transitions, 390 flow [2021-03-24 22:14:25,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:14:25,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:14:25,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 200 transitions. [2021-03-24 22:14:25,198 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.966183574879227 [2021-03-24 22:14:25,198 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 200 transitions. [2021-03-24 22:14:25,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 200 transitions. [2021-03-24 22:14:25,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:14:25,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 200 transitions. [2021-03-24 22:14:25,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 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) [2021-03-24 22:14:25,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 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) [2021-03-24 22:14:25,202 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 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) [2021-03-24 22:14:25,202 INFO L185 Difference]: Start difference. First operand has 68 places, 35 transitions, 390 flow. Second operand 3 states and 200 transitions. [2021-03-24 22:14:25,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 34 transitions, 390 flow [2021-03-24 22:14:25,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 34 transitions, 150 flow, removed 120 selfloop flow, removed 0 redundant places. [2021-03-24 22:14:25,204 INFO L241 Difference]: Finished difference. Result has 69 places, 34 transitions, 150 flow [2021-03-24 22:14:25,204 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=69, PETRI_TRANSITIONS=34} [2021-03-24 22:14:25,204 INFO L343 CegarLoopForPetriNet]: 68 programPoint places, 1 predicate places. [2021-03-24 22:14:25,204 INFO L480 AbstractCegarLoop]: Abstraction has has 69 places, 34 transitions, 150 flow [2021-03-24 22:14:25,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 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) [2021-03-24 22:14:25,205 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:25,205 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:14:25,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-03-24 22:14:25,205 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:25,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:25,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1833507392, now seen corresponding path program 1 times [2021-03-24 22:14:25,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:25,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961479122] [2021-03-24 22:14:25,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:25,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:25,213 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:25,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:25,216 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:25,218 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:14:25,218 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:14:25,218 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-03-24 22:14:25,218 WARN L342 ceAbstractionStarter]: 16 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:14:25,218 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 17 thread instances. [2021-03-24 22:14:25,242 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:14:25,242 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:14:25,243 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:14:25,243 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:14:25,243 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:14:25,243 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:14:25,243 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:14:25,243 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:14:25,243 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:14:25,243 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:14:25,244 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 91 places, 56 transitions, 469 flow [2021-03-24 22:14:25,252 INFO L129 PetriNetUnfolder]: 0/107 cut-off events. [2021-03-24 22:14:25,252 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:25,252 INFO L84 FinitePrefix]: Finished finitePrefix Result has 312 conditions, 107 events. 0/107 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 345 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2021-03-24 22:14:25,252 INFO L82 GeneralOperation]: Start removeDead. Operand has 91 places, 56 transitions, 469 flow [2021-03-24 22:14:25,253 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 89 places, 54 transitions, 465 flow [2021-03-24 22:14:25,253 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:14:25,253 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 89 places, 54 transitions, 465 flow [2021-03-24 22:14:25,253 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 89 places, 54 transitions, 465 flow [2021-03-24 22:14:25,254 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 89 places, 54 transitions, 465 flow [2021-03-24 22:14:25,261 INFO L129 PetriNetUnfolder]: 0/71 cut-off events. [2021-03-24 22:14:25,262 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:25,262 INFO L84 FinitePrefix]: Finished finitePrefix Result has 276 conditions, 71 events. 0/71 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 185 event pairs, 0 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2021-03-24 22:14:25,263 INFO L142 LiptonReduction]: Number of co-enabled transitions 1768 [2021-03-24 22:14:25,797 INFO L154 LiptonReduction]: Checked pairs total: 714 [2021-03-24 22:14:25,797 INFO L156 LiptonReduction]: Total number of compositions: 17 [2021-03-24 22:14:25,797 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 544 [2021-03-24 22:14:25,798 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-03-24 22:14:25,798 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:25,798 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:25,798 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:14:25,798 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:25,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:25,799 INFO L82 PathProgramCache]: Analyzing trace with hash 22819, now seen corresponding path program 1 times [2021-03-24 22:14:25,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:25,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246459247] [2021-03-24 22:14:25,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:25,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:14:25,804 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:14:25,804 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:14:25,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:14:25,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246459247] [2021-03-24 22:14:25,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:14:25,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:14:25,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035958281] [2021-03-24 22:14:25,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:14:25,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:14:25,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:14:25,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:14:25,808 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 73 [2021-03-24 22:14:25,809 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 37 transitions, 431 flow. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 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) [2021-03-24 22:14:25,809 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:14:25,809 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 73 [2021-03-24 22:14:25,809 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:14:25,816 INFO L129 PetriNetUnfolder]: 0/36 cut-off events. [2021-03-24 22:14:25,816 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:25,816 INFO L84 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 36 events. 0/36 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 33 event pairs, 0 based on Foata normal form. 18/54 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2021-03-24 22:14:25,816 INFO L132 encePairwiseOnDemand]: 71/73 looper letters, 0 selfloop transitions, 1 changer transitions 0/36 dead transitions. [2021-03-24 22:14:25,816 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 36 transitions, 431 flow [2021-03-24 22:14:25,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:14:25,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:14:25,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 212 transitions. [2021-03-24 22:14:25,817 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9680365296803652 [2021-03-24 22:14:25,817 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 212 transitions. [2021-03-24 22:14:25,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 212 transitions. [2021-03-24 22:14:25,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:14:25,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 212 transitions. [2021-03-24 22:14:25,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 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) [2021-03-24 22:14:25,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 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) [2021-03-24 22:14:25,819 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 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) [2021-03-24 22:14:25,819 INFO L185 Difference]: Start difference. First operand has 72 places, 37 transitions, 431 flow. Second operand 3 states and 212 transitions. [2021-03-24 22:14:25,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 36 transitions, 431 flow [2021-03-24 22:14:25,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 36 transitions, 159 flow, removed 136 selfloop flow, removed 0 redundant places. [2021-03-24 22:14:25,822 INFO L241 Difference]: Finished difference. Result has 73 places, 36 transitions, 159 flow [2021-03-24 22:14:25,822 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=159, PETRI_PLACES=73, PETRI_TRANSITIONS=36} [2021-03-24 22:14:25,822 INFO L343 CegarLoopForPetriNet]: 72 programPoint places, 1 predicate places. [2021-03-24 22:14:25,822 INFO L480 AbstractCegarLoop]: Abstraction has has 73 places, 36 transitions, 159 flow [2021-03-24 22:14:25,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 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) [2021-03-24 22:14:25,822 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:25,822 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:14:25,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-03-24 22:14:25,822 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:25,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:25,823 INFO L82 PathProgramCache]: Analyzing trace with hash 825672673, now seen corresponding path program 1 times [2021-03-24 22:14:25,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:25,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290151252] [2021-03-24 22:14:25,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:25,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:25,835 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:25,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:25,842 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:25,845 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:14:25,845 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:14:25,845 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-03-24 22:14:25,845 WARN L342 ceAbstractionStarter]: 17 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:14:25,845 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 18 thread instances. [2021-03-24 22:14:25,867 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:14:25,868 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:14:25,868 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:14:25,868 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:14:25,868 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:14:25,868 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:14:25,868 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:14:25,868 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:14:25,868 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:14:25,868 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:14:25,869 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 96 places, 59 transitions, 514 flow [2021-03-24 22:14:25,877 INFO L129 PetriNetUnfolder]: 0/113 cut-off events. [2021-03-24 22:14:25,877 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:25,877 INFO L84 FinitePrefix]: Finished finitePrefix Result has 339 conditions, 113 events. 0/113 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 366 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2021-03-24 22:14:25,877 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 59 transitions, 514 flow [2021-03-24 22:14:25,878 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 94 places, 57 transitions, 510 flow [2021-03-24 22:14:25,878 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:14:25,878 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 94 places, 57 transitions, 510 flow [2021-03-24 22:14:25,878 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 94 places, 57 transitions, 510 flow [2021-03-24 22:14:25,878 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 94 places, 57 transitions, 510 flow [2021-03-24 22:14:25,884 INFO L129 PetriNetUnfolder]: 0/75 cut-off events. [2021-03-24 22:14:25,884 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:25,884 INFO L84 FinitePrefix]: Finished finitePrefix Result has 301 conditions, 75 events. 0/75 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 185 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2021-03-24 22:14:25,886 INFO L142 LiptonReduction]: Number of co-enabled transitions 1980 [2021-03-24 22:14:26,444 INFO L154 LiptonReduction]: Checked pairs total: 801 [2021-03-24 22:14:26,444 INFO L156 LiptonReduction]: Total number of compositions: 18 [2021-03-24 22:14:26,444 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 566 [2021-03-24 22:14:26,446 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-03-24 22:14:26,447 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:26,447 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:26,447 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:14:26,447 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:26,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:26,447 INFO L82 PathProgramCache]: Analyzing trace with hash 25251, now seen corresponding path program 1 times [2021-03-24 22:14:26,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:26,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574338831] [2021-03-24 22:14:26,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:26,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:14:26,453 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:14:26,453 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:14:26,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:14:26,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574338831] [2021-03-24 22:14:26,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:14:26,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:14:26,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846674847] [2021-03-24 22:14:26,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:14:26,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:14:26,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:14:26,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:14:26,457 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 77 [2021-03-24 22:14:26,457 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 39 transitions, 474 flow. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 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) [2021-03-24 22:14:26,457 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:14:26,457 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 77 [2021-03-24 22:14:26,457 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:14:26,463 INFO L129 PetriNetUnfolder]: 0/38 cut-off events. [2021-03-24 22:14:26,463 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:26,463 INFO L84 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 36 event pairs, 0 based on Foata normal form. 19/57 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2021-03-24 22:14:26,464 INFO L132 encePairwiseOnDemand]: 75/77 looper letters, 0 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2021-03-24 22:14:26,464 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 38 transitions, 474 flow [2021-03-24 22:14:26,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:14:26,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:14:26,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 224 transitions. [2021-03-24 22:14:26,465 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9696969696969697 [2021-03-24 22:14:26,465 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 224 transitions. [2021-03-24 22:14:26,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 224 transitions. [2021-03-24 22:14:26,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:14:26,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 224 transitions. [2021-03-24 22:14:26,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 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) [2021-03-24 22:14:26,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 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) [2021-03-24 22:14:26,466 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 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) [2021-03-24 22:14:26,466 INFO L185 Difference]: Start difference. First operand has 76 places, 39 transitions, 474 flow. Second operand 3 states and 224 transitions. [2021-03-24 22:14:26,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 38 transitions, 474 flow [2021-03-24 22:14:26,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 38 transitions, 168 flow, removed 153 selfloop flow, removed 0 redundant places. [2021-03-24 22:14:26,470 INFO L241 Difference]: Finished difference. Result has 77 places, 38 transitions, 168 flow [2021-03-24 22:14:26,470 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=77, PETRI_TRANSITIONS=38} [2021-03-24 22:14:26,470 INFO L343 CegarLoopForPetriNet]: 76 programPoint places, 1 predicate places. [2021-03-24 22:14:26,470 INFO L480 AbstractCegarLoop]: Abstraction has has 77 places, 38 transitions, 168 flow [2021-03-24 22:14:26,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 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) [2021-03-24 22:14:26,470 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:26,470 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:14:26,470 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-03-24 22:14:26,470 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:26,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:26,471 INFO L82 PathProgramCache]: Analyzing trace with hash 334217731, now seen corresponding path program 1 times [2021-03-24 22:14:26,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:26,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535416997] [2021-03-24 22:14:26,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:26,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:26,476 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:26,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:26,485 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:26,490 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:14:26,490 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:14:26,491 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-03-24 22:14:26,491 WARN L342 ceAbstractionStarter]: 18 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:14:26,491 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 19 thread instances. [2021-03-24 22:14:26,511 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:14:26,511 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:14:26,512 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:14:26,512 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:14:26,512 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:14:26,512 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:14:26,512 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:14:26,512 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:14:26,512 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:14:26,512 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:14:26,513 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 101 places, 62 transitions, 561 flow [2021-03-24 22:14:26,521 INFO L129 PetriNetUnfolder]: 0/119 cut-off events. [2021-03-24 22:14:26,521 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:26,522 INFO L84 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 119 events. 0/119 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 380 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 0. Up to 20 conditions per place. [2021-03-24 22:14:26,522 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 62 transitions, 561 flow [2021-03-24 22:14:26,522 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 60 transitions, 557 flow [2021-03-24 22:14:26,523 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:14:26,523 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 60 transitions, 557 flow [2021-03-24 22:14:26,523 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 60 transitions, 557 flow [2021-03-24 22:14:26,523 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 99 places, 60 transitions, 557 flow [2021-03-24 22:14:26,532 INFO L129 PetriNetUnfolder]: 0/79 cut-off events. [2021-03-24 22:14:26,532 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:26,532 INFO L84 FinitePrefix]: Finished finitePrefix Result has 327 conditions, 79 events. 0/79 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 207 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 0. Up to 20 conditions per place. [2021-03-24 22:14:26,534 INFO L142 LiptonReduction]: Number of co-enabled transitions 2204 [2021-03-24 22:14:27,174 INFO L154 LiptonReduction]: Checked pairs total: 893 [2021-03-24 22:14:27,174 INFO L156 LiptonReduction]: Total number of compositions: 19 [2021-03-24 22:14:27,175 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 652 [2021-03-24 22:14:27,176 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-03-24 22:14:27,176 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:27,176 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:27,176 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:14:27,176 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:27,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:27,177 INFO L82 PathProgramCache]: Analyzing trace with hash 27811, now seen corresponding path program 1 times [2021-03-24 22:14:27,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:27,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39116341] [2021-03-24 22:14:27,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:27,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:14:27,182 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:14:27,182 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:14:27,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:14:27,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39116341] [2021-03-24 22:14:27,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:14:27,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:14:27,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921657144] [2021-03-24 22:14:27,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:14:27,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:14:27,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:14:27,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:14:27,186 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 81 [2021-03-24 22:14:27,187 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 41 transitions, 519 flow. Second operand has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 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) [2021-03-24 22:14:27,187 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:14:27,187 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 81 [2021-03-24 22:14:27,187 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:14:27,192 INFO L129 PetriNetUnfolder]: 0/40 cut-off events. [2021-03-24 22:14:27,192 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:27,192 INFO L84 FinitePrefix]: Finished finitePrefix Result has 290 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 37 event pairs, 0 based on Foata normal form. 20/60 useless extension candidates. Maximal degree in co-relation 0. Up to 20 conditions per place. [2021-03-24 22:14:27,193 INFO L132 encePairwiseOnDemand]: 79/81 looper letters, 0 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2021-03-24 22:14:27,193 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 40 transitions, 519 flow [2021-03-24 22:14:27,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:14:27,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:14:27,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 236 transitions. [2021-03-24 22:14:27,193 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9711934156378601 [2021-03-24 22:14:27,194 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 236 transitions. [2021-03-24 22:14:27,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 236 transitions. [2021-03-24 22:14:27,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:14:27,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 236 transitions. [2021-03-24 22:14:27,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 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) [2021-03-24 22:14:27,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 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) [2021-03-24 22:14:27,195 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 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) [2021-03-24 22:14:27,195 INFO L185 Difference]: Start difference. First operand has 80 places, 41 transitions, 519 flow. Second operand 3 states and 236 transitions. [2021-03-24 22:14:27,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 40 transitions, 519 flow [2021-03-24 22:14:27,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 40 transitions, 177 flow, removed 171 selfloop flow, removed 0 redundant places. [2021-03-24 22:14:27,201 INFO L241 Difference]: Finished difference. Result has 81 places, 40 transitions, 177 flow [2021-03-24 22:14:27,201 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=177, PETRI_PLACES=81, PETRI_TRANSITIONS=40} [2021-03-24 22:14:27,202 INFO L343 CegarLoopForPetriNet]: 80 programPoint places, 1 predicate places. [2021-03-24 22:14:27,202 INFO L480 AbstractCegarLoop]: Abstraction has has 81 places, 40 transitions, 177 flow [2021-03-24 22:14:27,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 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) [2021-03-24 22:14:27,202 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:27,202 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:14:27,202 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-03-24 22:14:27,202 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:27,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:27,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1359261028, now seen corresponding path program 1 times [2021-03-24 22:14:27,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:27,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074674883] [2021-03-24 22:14:27,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:27,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:27,207 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:27,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:27,208 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:27,215 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:14:27,215 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:14:27,215 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-03-24 22:14:27,216 WARN L342 ceAbstractionStarter]: 19 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:14:27,216 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 20 thread instances. [2021-03-24 22:14:27,239 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:14:27,240 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:14:27,240 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:14:27,240 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:14:27,240 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:14:27,240 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:14:27,240 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:14:27,240 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:14:27,240 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:14:27,240 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:14:27,241 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 106 places, 65 transitions, 610 flow [2021-03-24 22:14:27,250 INFO L129 PetriNetUnfolder]: 0/125 cut-off events. [2021-03-24 22:14:27,250 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:27,250 INFO L84 FinitePrefix]: Finished finitePrefix Result has 396 conditions, 125 events. 0/125 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 402 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 0. Up to 21 conditions per place. [2021-03-24 22:14:27,250 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 65 transitions, 610 flow [2021-03-24 22:14:27,252 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 63 transitions, 606 flow [2021-03-24 22:14:27,252 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:14:27,252 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 104 places, 63 transitions, 606 flow [2021-03-24 22:14:27,253 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 104 places, 63 transitions, 606 flow [2021-03-24 22:14:27,254 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 104 places, 63 transitions, 606 flow [2021-03-24 22:14:27,260 INFO L129 PetriNetUnfolder]: 0/83 cut-off events. [2021-03-24 22:14:27,260 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:27,260 INFO L84 FinitePrefix]: Finished finitePrefix Result has 354 conditions, 83 events. 0/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 223 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 0. Up to 21 conditions per place. [2021-03-24 22:14:27,262 INFO L142 LiptonReduction]: Number of co-enabled transitions 2440 [2021-03-24 22:14:27,985 INFO L154 LiptonReduction]: Checked pairs total: 990 [2021-03-24 22:14:27,986 INFO L156 LiptonReduction]: Total number of compositions: 20 [2021-03-24 22:14:27,986 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 734 [2021-03-24 22:14:27,988 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-03-24 22:14:27,988 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:27,988 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:27,988 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:14:27,988 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:27,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:27,988 INFO L82 PathProgramCache]: Analyzing trace with hash 30499, now seen corresponding path program 1 times [2021-03-24 22:14:27,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:27,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076642756] [2021-03-24 22:14:27,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:27,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:14:27,995 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:14:27,995 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:14:27,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:14:27,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076642756] [2021-03-24 22:14:27,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:14:27,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:14:27,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480456787] [2021-03-24 22:14:27,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:14:27,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:14:27,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:14:27,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:14:27,999 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 85 [2021-03-24 22:14:28,000 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 43 transitions, 566 flow. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 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) [2021-03-24 22:14:28,000 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:14:28,000 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 85 [2021-03-24 22:14:28,000 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:14:28,010 INFO L129 PetriNetUnfolder]: 0/42 cut-off events. [2021-03-24 22:14:28,010 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:28,011 INFO L84 FinitePrefix]: Finished finitePrefix Result has 315 conditions, 42 events. 0/42 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 42 event pairs, 0 based on Foata normal form. 21/63 useless extension candidates. Maximal degree in co-relation 0. Up to 21 conditions per place. [2021-03-24 22:14:28,011 INFO L132 encePairwiseOnDemand]: 83/85 looper letters, 0 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2021-03-24 22:14:28,011 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 42 transitions, 566 flow [2021-03-24 22:14:28,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:14:28,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:14:28,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 248 transitions. [2021-03-24 22:14:28,012 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9725490196078431 [2021-03-24 22:14:28,012 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 248 transitions. [2021-03-24 22:14:28,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 248 transitions. [2021-03-24 22:14:28,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:14:28,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 248 transitions. [2021-03-24 22:14:28,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 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) [2021-03-24 22:14:28,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 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) [2021-03-24 22:14:28,014 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 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) [2021-03-24 22:14:28,014 INFO L185 Difference]: Start difference. First operand has 84 places, 43 transitions, 566 flow. Second operand 3 states and 248 transitions. [2021-03-24 22:14:28,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 42 transitions, 566 flow [2021-03-24 22:14:28,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 42 transitions, 186 flow, removed 190 selfloop flow, removed 0 redundant places. [2021-03-24 22:14:28,019 INFO L241 Difference]: Finished difference. Result has 85 places, 42 transitions, 186 flow [2021-03-24 22:14:28,019 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=85, PETRI_TRANSITIONS=42} [2021-03-24 22:14:28,019 INFO L343 CegarLoopForPetriNet]: 84 programPoint places, 1 predicate places. [2021-03-24 22:14:28,019 INFO L480 AbstractCegarLoop]: Abstraction has has 85 places, 42 transitions, 186 flow [2021-03-24 22:14:28,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 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) [2021-03-24 22:14:28,020 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:28,020 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:14:28,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-03-24 22:14:28,020 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:28,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:28,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1298741190, now seen corresponding path program 1 times [2021-03-24 22:14:28,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:28,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255330060] [2021-03-24 22:14:28,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:28,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:28,025 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:28,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:28,027 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:28,029 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:14:28,029 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:14:28,030 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-03-24 22:14:28,030 WARN L342 ceAbstractionStarter]: 20 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:14:28,030 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 21 thread instances. [2021-03-24 22:14:28,053 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:14:28,053 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:14:28,054 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:14:28,054 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:14:28,054 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:14:28,054 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:14:28,054 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:14:28,054 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:14:28,054 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:14:28,054 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:14:28,055 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 111 places, 68 transitions, 661 flow [2021-03-24 22:14:28,065 INFO L129 PetriNetUnfolder]: 0/131 cut-off events. [2021-03-24 22:14:28,066 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:28,066 INFO L84 FinitePrefix]: Finished finitePrefix Result has 426 conditions, 131 events. 0/131 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 418 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 0. Up to 22 conditions per place. [2021-03-24 22:14:28,066 INFO L82 GeneralOperation]: Start removeDead. Operand has 111 places, 68 transitions, 661 flow [2021-03-24 22:14:28,067 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 66 transitions, 657 flow [2021-03-24 22:14:28,067 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:14:28,067 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 66 transitions, 657 flow [2021-03-24 22:14:28,067 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 66 transitions, 657 flow [2021-03-24 22:14:28,068 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 109 places, 66 transitions, 657 flow [2021-03-24 22:14:28,075 INFO L129 PetriNetUnfolder]: 0/87 cut-off events. [2021-03-24 22:14:28,076 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:28,076 INFO L84 FinitePrefix]: Finished finitePrefix Result has 382 conditions, 87 events. 0/87 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 257 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 0. Up to 22 conditions per place. [2021-03-24 22:14:28,078 INFO L142 LiptonReduction]: Number of co-enabled transitions 2688 [2021-03-24 22:14:28,803 INFO L154 LiptonReduction]: Checked pairs total: 1092 [2021-03-24 22:14:28,803 INFO L156 LiptonReduction]: Total number of compositions: 21 [2021-03-24 22:14:28,804 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 737 [2021-03-24 22:14:28,805 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:14:28,805 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:28,806 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:28,806 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:14:28,806 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:28,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:28,806 INFO L82 PathProgramCache]: Analyzing trace with hash 33315, now seen corresponding path program 1 times [2021-03-24 22:14:28,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:28,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825296356] [2021-03-24 22:14:28,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:28,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:14:28,810 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:14:28,811 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:14:28,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:14:28,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825296356] [2021-03-24 22:14:28,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:14:28,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:14:28,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026832913] [2021-03-24 22:14:28,813 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:14:28,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:14:28,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:14:28,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:14:28,814 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 89 [2021-03-24 22:14:28,814 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 45 transitions, 615 flow. Second operand has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 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) [2021-03-24 22:14:28,814 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:14:28,814 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 89 [2021-03-24 22:14:28,814 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:14:28,824 INFO L129 PetriNetUnfolder]: 0/44 cut-off events. [2021-03-24 22:14:28,824 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:28,825 INFO L84 FinitePrefix]: Finished finitePrefix Result has 341 conditions, 44 events. 0/44 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 47 event pairs, 0 based on Foata normal form. 22/66 useless extension candidates. Maximal degree in co-relation 0. Up to 22 conditions per place. [2021-03-24 22:14:28,825 INFO L132 encePairwiseOnDemand]: 87/89 looper letters, 0 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2021-03-24 22:14:28,825 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 44 transitions, 615 flow [2021-03-24 22:14:28,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:14:28,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:14:28,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 260 transitions. [2021-03-24 22:14:28,826 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9737827715355806 [2021-03-24 22:14:28,826 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 260 transitions. [2021-03-24 22:14:28,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 260 transitions. [2021-03-24 22:14:28,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:14:28,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 260 transitions. [2021-03-24 22:14:28,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 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) [2021-03-24 22:14:28,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 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) [2021-03-24 22:14:28,829 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 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) [2021-03-24 22:14:28,829 INFO L185 Difference]: Start difference. First operand has 88 places, 45 transitions, 615 flow. Second operand 3 states and 260 transitions. [2021-03-24 22:14:28,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 44 transitions, 615 flow [2021-03-24 22:14:28,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 44 transitions, 195 flow, removed 210 selfloop flow, removed 0 redundant places. [2021-03-24 22:14:28,834 INFO L241 Difference]: Finished difference. Result has 89 places, 44 transitions, 195 flow [2021-03-24 22:14:28,835 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=195, PETRI_PLACES=89, PETRI_TRANSITIONS=44} [2021-03-24 22:14:28,835 INFO L343 CegarLoopForPetriNet]: 88 programPoint places, 1 predicate places. [2021-03-24 22:14:28,835 INFO L480 AbstractCegarLoop]: Abstraction has has 89 places, 44 transitions, 195 flow [2021-03-24 22:14:28,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 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) [2021-03-24 22:14:28,835 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:28,836 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:14:28,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-03-24 22:14:28,836 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:28,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:28,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1084276377, now seen corresponding path program 1 times [2021-03-24 22:14:28,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:28,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439669261] [2021-03-24 22:14:28,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:28,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:28,840 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:28,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:28,841 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:28,844 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:14:28,844 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:14:28,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-03-24 22:14:28,844 WARN L342 ceAbstractionStarter]: 21 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:14:28,844 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 22 thread instances. [2021-03-24 22:14:28,866 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:14:28,866 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:14:28,867 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:14:28,867 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:14:28,867 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:14:28,867 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:14:28,867 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:14:28,867 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:14:28,867 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:14:28,867 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:14:28,868 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 116 places, 71 transitions, 714 flow [2021-03-24 22:14:28,878 INFO L129 PetriNetUnfolder]: 0/137 cut-off events. [2021-03-24 22:14:28,878 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:28,878 INFO L84 FinitePrefix]: Finished finitePrefix Result has 457 conditions, 137 events. 0/137 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 447 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2021-03-24 22:14:28,878 INFO L82 GeneralOperation]: Start removeDead. Operand has 116 places, 71 transitions, 714 flow [2021-03-24 22:14:28,879 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 69 transitions, 710 flow [2021-03-24 22:14:28,879 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:14:28,879 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 114 places, 69 transitions, 710 flow [2021-03-24 22:14:28,880 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 114 places, 69 transitions, 710 flow [2021-03-24 22:14:28,880 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 114 places, 69 transitions, 710 flow [2021-03-24 22:14:28,887 INFO L129 PetriNetUnfolder]: 0/91 cut-off events. [2021-03-24 22:14:28,887 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:28,887 INFO L84 FinitePrefix]: Finished finitePrefix Result has 411 conditions, 91 events. 0/91 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 281 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2021-03-24 22:14:28,890 INFO L142 LiptonReduction]: Number of co-enabled transitions 2948 [2021-03-24 22:14:29,705 INFO L154 LiptonReduction]: Checked pairs total: 1199 [2021-03-24 22:14:29,706 INFO L156 LiptonReduction]: Total number of compositions: 22 [2021-03-24 22:14:29,706 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 827 [2021-03-24 22:14:29,708 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:14:29,708 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:29,708 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:29,708 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:14:29,708 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:29,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:29,709 INFO L82 PathProgramCache]: Analyzing trace with hash 36259, now seen corresponding path program 1 times [2021-03-24 22:14:29,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:29,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945034327] [2021-03-24 22:14:29,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:29,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:14:29,715 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:14:29,715 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:14:29,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:14:29,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945034327] [2021-03-24 22:14:29,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:14:29,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:14:29,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316957401] [2021-03-24 22:14:29,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:14:29,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:14:29,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:14:29,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:14:29,718 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 93 [2021-03-24 22:14:29,719 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 47 transitions, 666 flow. Second operand has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 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) [2021-03-24 22:14:29,719 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:14:29,719 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 93 [2021-03-24 22:14:29,719 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:14:29,726 INFO L129 PetriNetUnfolder]: 0/46 cut-off events. [2021-03-24 22:14:29,726 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:29,726 INFO L84 FinitePrefix]: Finished finitePrefix Result has 368 conditions, 46 events. 0/46 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 46 event pairs, 0 based on Foata normal form. 23/69 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2021-03-24 22:14:29,726 INFO L132 encePairwiseOnDemand]: 91/93 looper letters, 0 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2021-03-24 22:14:29,726 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 46 transitions, 666 flow [2021-03-24 22:14:29,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:14:29,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:14:29,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 272 transitions. [2021-03-24 22:14:29,728 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.974910394265233 [2021-03-24 22:14:29,728 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 272 transitions. [2021-03-24 22:14:29,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 272 transitions. [2021-03-24 22:14:29,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:14:29,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 272 transitions. [2021-03-24 22:14:29,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 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) [2021-03-24 22:14:29,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 93.0) internal successors, (372), 4 states have internal predecessors, (372), 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) [2021-03-24 22:14:29,730 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 93.0) internal successors, (372), 4 states have internal predecessors, (372), 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) [2021-03-24 22:14:29,730 INFO L185 Difference]: Start difference. First operand has 92 places, 47 transitions, 666 flow. Second operand 3 states and 272 transitions. [2021-03-24 22:14:29,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 46 transitions, 666 flow [2021-03-24 22:14:29,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 46 transitions, 204 flow, removed 231 selfloop flow, removed 0 redundant places. [2021-03-24 22:14:29,737 INFO L241 Difference]: Finished difference. Result has 93 places, 46 transitions, 204 flow [2021-03-24 22:14:29,737 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=93, PETRI_TRANSITIONS=46} [2021-03-24 22:14:29,737 INFO L343 CegarLoopForPetriNet]: 92 programPoint places, 1 predicate places. [2021-03-24 22:14:29,737 INFO L480 AbstractCegarLoop]: Abstraction has has 93 places, 46 transitions, 204 flow [2021-03-24 22:14:29,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 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) [2021-03-24 22:14:29,738 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:29,738 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:14:29,738 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-03-24 22:14:29,738 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:29,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:29,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1905098359, now seen corresponding path program 1 times [2021-03-24 22:14:29,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:29,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185871417] [2021-03-24 22:14:29,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:29,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:29,742 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:29,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:29,743 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:29,749 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:14:29,749 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:14:29,749 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-03-24 22:14:29,749 WARN L342 ceAbstractionStarter]: 22 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:14:29,750 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 23 thread instances. [2021-03-24 22:14:29,775 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:14:29,775 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:14:29,776 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:14:29,776 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:14:29,776 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:14:29,776 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:14:29,776 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:14:29,776 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:14:29,776 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:14:29,776 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:14:29,778 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 121 places, 74 transitions, 769 flow [2021-03-24 22:14:29,789 INFO L129 PetriNetUnfolder]: 0/143 cut-off events. [2021-03-24 22:14:29,790 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:29,790 INFO L84 FinitePrefix]: Finished finitePrefix Result has 489 conditions, 143 events. 0/143 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 469 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 0. Up to 24 conditions per place. [2021-03-24 22:14:29,790 INFO L82 GeneralOperation]: Start removeDead. Operand has 121 places, 74 transitions, 769 flow [2021-03-24 22:14:29,791 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 119 places, 72 transitions, 765 flow [2021-03-24 22:14:29,791 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:14:29,791 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 119 places, 72 transitions, 765 flow [2021-03-24 22:14:29,791 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 119 places, 72 transitions, 765 flow [2021-03-24 22:14:29,791 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 119 places, 72 transitions, 765 flow [2021-03-24 22:14:29,800 INFO L129 PetriNetUnfolder]: 0/95 cut-off events. [2021-03-24 22:14:29,800 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:29,800 INFO L84 FinitePrefix]: Finished finitePrefix Result has 441 conditions, 95 events. 0/95 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 275 event pairs, 0 based on Foata normal form. 0/95 useless extension candidates. Maximal degree in co-relation 0. Up to 24 conditions per place. [2021-03-24 22:14:29,802 INFO L142 LiptonReduction]: Number of co-enabled transitions 3220 [2021-03-24 22:14:30,606 INFO L154 LiptonReduction]: Checked pairs total: 1311 [2021-03-24 22:14:30,606 INFO L156 LiptonReduction]: Total number of compositions: 23 [2021-03-24 22:14:30,606 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 815 [2021-03-24 22:14:30,607 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-03-24 22:14:30,607 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:30,607 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:30,608 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:14:30,608 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:30,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:30,608 INFO L82 PathProgramCache]: Analyzing trace with hash 39331, now seen corresponding path program 1 times [2021-03-24 22:14:30,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:30,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361245480] [2021-03-24 22:14:30,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:30,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:14:30,612 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:14:30,612 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:14:30,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:14:30,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361245480] [2021-03-24 22:14:30,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:14:30,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:14:30,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88204276] [2021-03-24 22:14:30,615 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:14:30,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:14:30,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:14:30,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:14:30,616 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 97 [2021-03-24 22:14:30,616 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 49 transitions, 719 flow. Second operand has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 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) [2021-03-24 22:14:30,616 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:14:30,616 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 97 [2021-03-24 22:14:30,616 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:14:30,623 INFO L129 PetriNetUnfolder]: 0/48 cut-off events. [2021-03-24 22:14:30,623 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:30,623 INFO L84 FinitePrefix]: Finished finitePrefix Result has 396 conditions, 48 events. 0/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 47 event pairs, 0 based on Foata normal form. 24/72 useless extension candidates. Maximal degree in co-relation 0. Up to 24 conditions per place. [2021-03-24 22:14:30,623 INFO L132 encePairwiseOnDemand]: 95/97 looper letters, 0 selfloop transitions, 1 changer transitions 0/48 dead transitions. [2021-03-24 22:14:30,623 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 48 transitions, 719 flow [2021-03-24 22:14:30,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:14:30,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:14:30,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 284 transitions. [2021-03-24 22:14:30,624 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9759450171821306 [2021-03-24 22:14:30,624 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 284 transitions. [2021-03-24 22:14:30,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 284 transitions. [2021-03-24 22:14:30,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:14:30,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 284 transitions. [2021-03-24 22:14:30,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 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) [2021-03-24 22:14:30,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 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) [2021-03-24 22:14:30,625 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 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) [2021-03-24 22:14:30,626 INFO L185 Difference]: Start difference. First operand has 96 places, 49 transitions, 719 flow. Second operand 3 states and 284 transitions. [2021-03-24 22:14:30,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 48 transitions, 719 flow [2021-03-24 22:14:30,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 48 transitions, 213 flow, removed 253 selfloop flow, removed 0 redundant places. [2021-03-24 22:14:30,632 INFO L241 Difference]: Finished difference. Result has 97 places, 48 transitions, 213 flow [2021-03-24 22:14:30,632 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=213, PETRI_PLACES=97, PETRI_TRANSITIONS=48} [2021-03-24 22:14:30,632 INFO L343 CegarLoopForPetriNet]: 96 programPoint places, 1 predicate places. [2021-03-24 22:14:30,632 INFO L480 AbstractCegarLoop]: Abstraction has has 97 places, 48 transitions, 213 flow [2021-03-24 22:14:30,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 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) [2021-03-24 22:14:30,632 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:30,632 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:14:30,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-03-24 22:14:30,632 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:30,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:30,633 INFO L82 PathProgramCache]: Analyzing trace with hash -113046974, now seen corresponding path program 1 times [2021-03-24 22:14:30,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:30,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632764278] [2021-03-24 22:14:30,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:30,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:30,636 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:30,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:30,638 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:30,640 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:14:30,640 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:14:30,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-03-24 22:14:30,641 WARN L342 ceAbstractionStarter]: 23 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:14:30,641 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 24 thread instances. [2021-03-24 22:14:30,663 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:14:30,664 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:14:30,664 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:14:30,664 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:14:30,664 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:14:30,664 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:14:30,664 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:14:30,664 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:14:30,664 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:14:30,664 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:14:30,665 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 126 places, 77 transitions, 826 flow [2021-03-24 22:14:30,676 INFO L129 PetriNetUnfolder]: 0/149 cut-off events. [2021-03-24 22:14:30,676 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:30,676 INFO L84 FinitePrefix]: Finished finitePrefix Result has 522 conditions, 149 events. 0/149 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 472 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 0. Up to 25 conditions per place. [2021-03-24 22:14:30,677 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 77 transitions, 826 flow [2021-03-24 22:14:30,677 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 124 places, 75 transitions, 822 flow [2021-03-24 22:14:30,678 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:14:30,678 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 124 places, 75 transitions, 822 flow [2021-03-24 22:14:30,678 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 124 places, 75 transitions, 822 flow [2021-03-24 22:14:30,678 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 124 places, 75 transitions, 822 flow [2021-03-24 22:14:30,687 INFO L129 PetriNetUnfolder]: 0/99 cut-off events. [2021-03-24 22:14:30,687 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:30,687 INFO L84 FinitePrefix]: Finished finitePrefix Result has 472 conditions, 99 events. 0/99 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 279 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 0. Up to 25 conditions per place. [2021-03-24 22:14:30,690 INFO L142 LiptonReduction]: Number of co-enabled transitions 3504 [2021-03-24 22:14:31,558 INFO L154 LiptonReduction]: Checked pairs total: 1428 [2021-03-24 22:14:31,558 INFO L156 LiptonReduction]: Total number of compositions: 24 [2021-03-24 22:14:31,558 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 880 [2021-03-24 22:14:31,559 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:14:31,559 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:31,559 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:31,559 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:14:31,559 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:31,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:31,559 INFO L82 PathProgramCache]: Analyzing trace with hash 42531, now seen corresponding path program 1 times [2021-03-24 22:14:31,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:31,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859667317] [2021-03-24 22:14:31,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:31,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:14:31,572 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:14:31,572 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:14:31,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:14:31,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859667317] [2021-03-24 22:14:31,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:14:31,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:14:31,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826387716] [2021-03-24 22:14:31,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:14:31,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:14:31,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:14:31,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:14:31,579 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 101 [2021-03-24 22:14:31,580 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 51 transitions, 774 flow. Second operand has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 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) [2021-03-24 22:14:31,580 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:14:31,580 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 101 [2021-03-24 22:14:31,580 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:14:31,587 INFO L129 PetriNetUnfolder]: 0/50 cut-off events. [2021-03-24 22:14:31,587 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:31,587 INFO L84 FinitePrefix]: Finished finitePrefix Result has 425 conditions, 50 events. 0/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 52 event pairs, 0 based on Foata normal form. 25/75 useless extension candidates. Maximal degree in co-relation 0. Up to 25 conditions per place. [2021-03-24 22:14:31,588 INFO L132 encePairwiseOnDemand]: 99/101 looper letters, 0 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2021-03-24 22:14:31,588 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 50 transitions, 774 flow [2021-03-24 22:14:31,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:14:31,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:14:31,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 296 transitions. [2021-03-24 22:14:31,589 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.976897689768977 [2021-03-24 22:14:31,589 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 296 transitions. [2021-03-24 22:14:31,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 296 transitions. [2021-03-24 22:14:31,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:14:31,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 296 transitions. [2021-03-24 22:14:31,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 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) [2021-03-24 22:14:31,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 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) [2021-03-24 22:14:31,590 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 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) [2021-03-24 22:14:31,590 INFO L185 Difference]: Start difference. First operand has 100 places, 51 transitions, 774 flow. Second operand 3 states and 296 transitions. [2021-03-24 22:14:31,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 50 transitions, 774 flow [2021-03-24 22:14:31,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 50 transitions, 222 flow, removed 276 selfloop flow, removed 0 redundant places. [2021-03-24 22:14:31,596 INFO L241 Difference]: Finished difference. Result has 101 places, 50 transitions, 222 flow [2021-03-24 22:14:31,596 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=101, PETRI_TRANSITIONS=50} [2021-03-24 22:14:31,596 INFO L343 CegarLoopForPetriNet]: 100 programPoint places, 1 predicate places. [2021-03-24 22:14:31,596 INFO L480 AbstractCegarLoop]: Abstraction has has 101 places, 50 transitions, 222 flow [2021-03-24 22:14:31,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 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) [2021-03-24 22:14:31,597 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:31,597 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:14:31,597 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-03-24 22:14:31,597 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:31,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:31,597 INFO L82 PathProgramCache]: Analyzing trace with hash -2014993076, now seen corresponding path program 1 times [2021-03-24 22:14:31,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:31,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316083262] [2021-03-24 22:14:31,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:31,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:31,602 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:31,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:31,611 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:31,615 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:14:31,615 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:14:31,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-03-24 22:14:31,615 WARN L342 ceAbstractionStarter]: 24 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:14:31,615 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 25 thread instances. [2021-03-24 22:14:31,641 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:14:31,641 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:14:31,641 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:14:31,642 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:14:31,642 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:14:31,642 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:14:31,642 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:14:31,642 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:14:31,642 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:14:31,642 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:14:31,643 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 131 places, 80 transitions, 885 flow [2021-03-24 22:14:31,655 INFO L129 PetriNetUnfolder]: 0/155 cut-off events. [2021-03-24 22:14:31,655 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:31,655 INFO L84 FinitePrefix]: Finished finitePrefix Result has 556 conditions, 155 events. 0/155 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 516 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 0. Up to 26 conditions per place. [2021-03-24 22:14:31,655 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 80 transitions, 885 flow [2021-03-24 22:14:31,656 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 78 transitions, 881 flow [2021-03-24 22:14:31,656 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:14:31,656 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 129 places, 78 transitions, 881 flow [2021-03-24 22:14:31,656 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 129 places, 78 transitions, 881 flow [2021-03-24 22:14:31,657 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 129 places, 78 transitions, 881 flow [2021-03-24 22:14:31,665 INFO L129 PetriNetUnfolder]: 0/103 cut-off events. [2021-03-24 22:14:31,666 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:31,666 INFO L84 FinitePrefix]: Finished finitePrefix Result has 504 conditions, 103 events. 0/103 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 261 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 0. Up to 26 conditions per place. [2021-03-24 22:14:31,670 INFO L142 LiptonReduction]: Number of co-enabled transitions 3800 [2021-03-24 22:14:32,579 INFO L154 LiptonReduction]: Checked pairs total: 1550 [2021-03-24 22:14:32,579 INFO L156 LiptonReduction]: Total number of compositions: 25 [2021-03-24 22:14:32,580 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 924 [2021-03-24 22:14:32,580 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-03-24 22:14:32,580 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:32,580 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:32,580 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:14:32,581 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:32,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:32,581 INFO L82 PathProgramCache]: Analyzing trace with hash 45859, now seen corresponding path program 1 times [2021-03-24 22:14:32,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:32,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615894367] [2021-03-24 22:14:32,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:32,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:14:32,589 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:14:32,589 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:14:32,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:14:32,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615894367] [2021-03-24 22:14:32,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:14:32,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:14:32,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456062222] [2021-03-24 22:14:32,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:14:32,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:14:32,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:14:32,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:14:32,592 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 105 [2021-03-24 22:14:32,593 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 53 transitions, 831 flow. Second operand has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 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) [2021-03-24 22:14:32,593 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:14:32,593 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 105 [2021-03-24 22:14:32,593 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:14:32,600 INFO L129 PetriNetUnfolder]: 0/52 cut-off events. [2021-03-24 22:14:32,601 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:32,601 INFO L84 FinitePrefix]: Finished finitePrefix Result has 455 conditions, 52 events. 0/52 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 47 event pairs, 0 based on Foata normal form. 26/78 useless extension candidates. Maximal degree in co-relation 0. Up to 26 conditions per place. [2021-03-24 22:14:32,601 INFO L132 encePairwiseOnDemand]: 103/105 looper letters, 0 selfloop transitions, 1 changer transitions 0/52 dead transitions. [2021-03-24 22:14:32,601 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 52 transitions, 831 flow [2021-03-24 22:14:32,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:14:32,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:14:32,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 308 transitions. [2021-03-24 22:14:32,602 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9777777777777777 [2021-03-24 22:14:32,602 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 308 transitions. [2021-03-24 22:14:32,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 308 transitions. [2021-03-24 22:14:32,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:14:32,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 308 transitions. [2021-03-24 22:14:32,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 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) [2021-03-24 22:14:32,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 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) [2021-03-24 22:14:32,604 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 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) [2021-03-24 22:14:32,604 INFO L185 Difference]: Start difference. First operand has 104 places, 53 transitions, 831 flow. Second operand 3 states and 308 transitions. [2021-03-24 22:14:32,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 52 transitions, 831 flow [2021-03-24 22:14:32,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 52 transitions, 231 flow, removed 300 selfloop flow, removed 0 redundant places. [2021-03-24 22:14:32,610 INFO L241 Difference]: Finished difference. Result has 105 places, 52 transitions, 231 flow [2021-03-24 22:14:32,610 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=231, PETRI_PLACES=105, PETRI_TRANSITIONS=52} [2021-03-24 22:14:32,610 INFO L343 CegarLoopForPetriNet]: 104 programPoint places, 1 predicate places. [2021-03-24 22:14:32,610 INFO L480 AbstractCegarLoop]: Abstraction has has 105 places, 52 transitions, 231 flow [2021-03-24 22:14:32,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 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) [2021-03-24 22:14:32,611 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:32,611 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:14:32,611 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-03-24 22:14:32,611 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:32,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:32,611 INFO L82 PathProgramCache]: Analyzing trace with hash -4577491, now seen corresponding path program 1 times [2021-03-24 22:14:32,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:32,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621287284] [2021-03-24 22:14:32,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:32,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:32,616 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:32,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:32,617 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:32,619 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:14:32,620 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:14:32,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-03-24 22:14:32,620 WARN L342 ceAbstractionStarter]: 25 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:14:32,620 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 26 thread instances. [2021-03-24 22:14:32,643 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:14:32,644 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:14:32,644 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:14:32,644 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:14:32,644 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:14:32,644 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:14:32,644 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:14:32,645 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:14:32,645 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:14:32,645 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:14:32,645 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 136 places, 83 transitions, 946 flow [2021-03-24 22:14:32,658 INFO L129 PetriNetUnfolder]: 0/161 cut-off events. [2021-03-24 22:14:32,658 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:32,658 INFO L84 FinitePrefix]: Finished finitePrefix Result has 591 conditions, 161 events. 0/161 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 506 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2021-03-24 22:14:32,658 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 83 transitions, 946 flow [2021-03-24 22:14:32,659 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 81 transitions, 942 flow [2021-03-24 22:14:32,659 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:14:32,659 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 134 places, 81 transitions, 942 flow [2021-03-24 22:14:32,659 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 134 places, 81 transitions, 942 flow [2021-03-24 22:14:32,660 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 134 places, 81 transitions, 942 flow [2021-03-24 22:14:32,669 INFO L129 PetriNetUnfolder]: 0/107 cut-off events. [2021-03-24 22:14:32,669 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:32,669 INFO L84 FinitePrefix]: Finished finitePrefix Result has 537 conditions, 107 events. 0/107 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 345 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2021-03-24 22:14:32,673 INFO L142 LiptonReduction]: Number of co-enabled transitions 4108 [2021-03-24 22:14:33,764 INFO L154 LiptonReduction]: Checked pairs total: 1677 [2021-03-24 22:14:33,764 INFO L156 LiptonReduction]: Total number of compositions: 26 [2021-03-24 22:14:33,764 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1105 [2021-03-24 22:14:33,765 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-03-24 22:14:33,765 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:33,765 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:33,765 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:14:33,765 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:33,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:33,765 INFO L82 PathProgramCache]: Analyzing trace with hash 49315, now seen corresponding path program 1 times [2021-03-24 22:14:33,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:33,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647081589] [2021-03-24 22:14:33,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:33,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:14:33,771 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:14:33,771 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:14:33,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:14:33,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647081589] [2021-03-24 22:14:33,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:14:33,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:14:33,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188201976] [2021-03-24 22:14:33,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:14:33,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:14:33,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:14:33,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:14:33,775 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 109 [2021-03-24 22:14:33,775 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 55 transitions, 890 flow. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 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) [2021-03-24 22:14:33,775 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:14:33,775 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 109 [2021-03-24 22:14:33,775 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:14:33,783 INFO L129 PetriNetUnfolder]: 0/54 cut-off events. [2021-03-24 22:14:33,783 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:33,783 INFO L84 FinitePrefix]: Finished finitePrefix Result has 486 conditions, 54 events. 0/54 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 38 event pairs, 0 based on Foata normal form. 27/81 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2021-03-24 22:14:33,784 INFO L132 encePairwiseOnDemand]: 107/109 looper letters, 0 selfloop transitions, 1 changer transitions 0/54 dead transitions. [2021-03-24 22:14:33,784 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 54 transitions, 890 flow [2021-03-24 22:14:33,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:14:33,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:14:33,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 320 transitions. [2021-03-24 22:14:33,785 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9785932721712538 [2021-03-24 22:14:33,785 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 320 transitions. [2021-03-24 22:14:33,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 320 transitions. [2021-03-24 22:14:33,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:14:33,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 320 transitions. [2021-03-24 22:14:33,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 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) [2021-03-24 22:14:33,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 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) [2021-03-24 22:14:33,787 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 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) [2021-03-24 22:14:33,787 INFO L185 Difference]: Start difference. First operand has 108 places, 55 transitions, 890 flow. Second operand 3 states and 320 transitions. [2021-03-24 22:14:33,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 54 transitions, 890 flow [2021-03-24 22:14:33,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 54 transitions, 240 flow, removed 325 selfloop flow, removed 0 redundant places. [2021-03-24 22:14:33,794 INFO L241 Difference]: Finished difference. Result has 109 places, 54 transitions, 240 flow [2021-03-24 22:14:33,794 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=240, PETRI_PLACES=109, PETRI_TRANSITIONS=54} [2021-03-24 22:14:33,794 INFO L343 CegarLoopForPetriNet]: 108 programPoint places, 1 predicate places. [2021-03-24 22:14:33,795 INFO L480 AbstractCegarLoop]: Abstraction has has 109 places, 54 transitions, 240 flow [2021-03-24 22:14:33,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 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) [2021-03-24 22:14:33,795 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:33,795 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:14:33,795 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-03-24 22:14:33,795 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:33,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:33,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1477290255, now seen corresponding path program 1 times [2021-03-24 22:14:33,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:33,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117341680] [2021-03-24 22:14:33,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:33,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:33,800 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:33,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:33,801 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:33,804 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:14:33,804 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:14:33,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-03-24 22:14:33,804 WARN L342 ceAbstractionStarter]: 26 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:14:33,804 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 27 thread instances. [2021-03-24 22:14:33,830 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:14:33,830 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:14:33,830 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:14:33,830 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:14:33,831 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:14:33,831 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:14:33,831 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:14:33,831 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:14:33,831 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:14:33,831 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:14:33,832 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 141 places, 86 transitions, 1009 flow [2021-03-24 22:14:33,845 INFO L129 PetriNetUnfolder]: 0/167 cut-off events. [2021-03-24 22:14:33,845 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:33,845 INFO L84 FinitePrefix]: Finished finitePrefix Result has 627 conditions, 167 events. 0/167 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 561 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 0. Up to 28 conditions per place. [2021-03-24 22:14:33,846 INFO L82 GeneralOperation]: Start removeDead. Operand has 141 places, 86 transitions, 1009 flow [2021-03-24 22:14:33,846 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 139 places, 84 transitions, 1005 flow [2021-03-24 22:14:33,847 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:14:33,847 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 139 places, 84 transitions, 1005 flow [2021-03-24 22:14:33,847 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 139 places, 84 transitions, 1005 flow [2021-03-24 22:14:33,847 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 139 places, 84 transitions, 1005 flow [2021-03-24 22:14:33,858 INFO L129 PetriNetUnfolder]: 0/111 cut-off events. [2021-03-24 22:14:33,858 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:33,858 INFO L84 FinitePrefix]: Finished finitePrefix Result has 571 conditions, 111 events. 0/111 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 304 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 0. Up to 28 conditions per place. [2021-03-24 22:14:33,861 INFO L142 LiptonReduction]: Number of co-enabled transitions 4428 [2021-03-24 22:14:34,863 INFO L154 LiptonReduction]: Checked pairs total: 1809 [2021-03-24 22:14:34,863 INFO L156 LiptonReduction]: Total number of compositions: 27 [2021-03-24 22:14:34,863 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1016 [2021-03-24 22:14:34,864 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:14:34,864 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:34,864 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:34,864 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:14:34,864 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:34,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:34,865 INFO L82 PathProgramCache]: Analyzing trace with hash 52899, now seen corresponding path program 1 times [2021-03-24 22:14:34,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:34,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305112061] [2021-03-24 22:14:34,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:34,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:14:34,871 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:14:34,872 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:14:34,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:14:34,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305112061] [2021-03-24 22:14:34,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:14:34,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:14:34,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911998600] [2021-03-24 22:14:34,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:14:34,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:14:34,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:14:34,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:14:34,875 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 113 [2021-03-24 22:14:34,875 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 57 transitions, 951 flow. Second operand has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 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) [2021-03-24 22:14:34,875 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:14:34,875 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 113 [2021-03-24 22:14:34,875 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:14:34,884 INFO L129 PetriNetUnfolder]: 0/56 cut-off events. [2021-03-24 22:14:34,884 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:34,884 INFO L84 FinitePrefix]: Finished finitePrefix Result has 518 conditions, 56 events. 0/56 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 57 event pairs, 0 based on Foata normal form. 28/84 useless extension candidates. Maximal degree in co-relation 0. Up to 28 conditions per place. [2021-03-24 22:14:34,884 INFO L132 encePairwiseOnDemand]: 111/113 looper letters, 0 selfloop transitions, 1 changer transitions 0/56 dead transitions. [2021-03-24 22:14:34,884 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 56 transitions, 951 flow [2021-03-24 22:14:34,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:14:34,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:14:34,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 332 transitions. [2021-03-24 22:14:34,885 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9793510324483776 [2021-03-24 22:14:34,885 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 332 transitions. [2021-03-24 22:14:34,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 332 transitions. [2021-03-24 22:14:34,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:14:34,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 332 transitions. [2021-03-24 22:14:34,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 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) [2021-03-24 22:14:34,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 113.0) internal successors, (452), 4 states have internal predecessors, (452), 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) [2021-03-24 22:14:34,887 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 113.0) internal successors, (452), 4 states have internal predecessors, (452), 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) [2021-03-24 22:14:34,887 INFO L185 Difference]: Start difference. First operand has 112 places, 57 transitions, 951 flow. Second operand 3 states and 332 transitions. [2021-03-24 22:14:34,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 56 transitions, 951 flow [2021-03-24 22:14:34,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 56 transitions, 249 flow, removed 351 selfloop flow, removed 0 redundant places. [2021-03-24 22:14:34,895 INFO L241 Difference]: Finished difference. Result has 113 places, 56 transitions, 249 flow [2021-03-24 22:14:34,895 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=113, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=249, PETRI_PLACES=113, PETRI_TRANSITIONS=56} [2021-03-24 22:14:34,895 INFO L343 CegarLoopForPetriNet]: 112 programPoint places, 1 predicate places. [2021-03-24 22:14:34,895 INFO L480 AbstractCegarLoop]: Abstraction has has 113 places, 56 transitions, 249 flow [2021-03-24 22:14:34,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 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) [2021-03-24 22:14:34,895 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:34,896 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:14:34,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-03-24 22:14:34,896 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:34,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:34,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1932848600, now seen corresponding path program 1 times [2021-03-24 22:14:34,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:34,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480334369] [2021-03-24 22:14:34,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:34,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:34,901 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:34,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:34,902 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:34,905 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:14:34,905 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:14:34,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-03-24 22:14:34,905 WARN L342 ceAbstractionStarter]: 27 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:14:34,906 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 28 thread instances. [2021-03-24 22:14:34,934 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:14:34,934 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:14:34,935 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:14:34,935 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:14:34,935 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:14:34,935 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:14:34,935 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:14:34,935 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:14:34,935 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:14:34,935 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:14:34,936 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 146 places, 89 transitions, 1074 flow [2021-03-24 22:14:34,951 INFO L129 PetriNetUnfolder]: 0/173 cut-off events. [2021-03-24 22:14:34,951 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:34,951 INFO L84 FinitePrefix]: Finished finitePrefix Result has 664 conditions, 173 events. 0/173 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 571 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 0. Up to 29 conditions per place. [2021-03-24 22:14:34,951 INFO L82 GeneralOperation]: Start removeDead. Operand has 146 places, 89 transitions, 1074 flow [2021-03-24 22:14:34,952 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 144 places, 87 transitions, 1070 flow [2021-03-24 22:14:34,952 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:14:34,952 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 144 places, 87 transitions, 1070 flow [2021-03-24 22:14:34,952 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 144 places, 87 transitions, 1070 flow [2021-03-24 22:14:34,953 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 144 places, 87 transitions, 1070 flow [2021-03-24 22:14:34,964 INFO L129 PetriNetUnfolder]: 0/115 cut-off events. [2021-03-24 22:14:34,964 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:34,964 INFO L84 FinitePrefix]: Finished finitePrefix Result has 606 conditions, 115 events. 0/115 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 361 event pairs, 0 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 0. Up to 29 conditions per place. [2021-03-24 22:14:34,968 INFO L142 LiptonReduction]: Number of co-enabled transitions 4760 [2021-03-24 22:14:36,045 INFO L154 LiptonReduction]: Checked pairs total: 1946 [2021-03-24 22:14:36,045 INFO L156 LiptonReduction]: Total number of compositions: 28 [2021-03-24 22:14:36,045 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1093 [2021-03-24 22:14:36,046 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:14:36,046 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:36,046 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:36,046 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:14:36,046 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:36,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:36,047 INFO L82 PathProgramCache]: Analyzing trace with hash 56611, now seen corresponding path program 1 times [2021-03-24 22:14:36,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:36,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693138209] [2021-03-24 22:14:36,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:36,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:14:36,056 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:14:36,056 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:14:36,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:14:36,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693138209] [2021-03-24 22:14:36,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:14:36,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:14:36,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586860815] [2021-03-24 22:14:36,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:14:36,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:14:36,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:14:36,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:14:36,060 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 117 [2021-03-24 22:14:36,060 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 59 transitions, 1014 flow. Second operand has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 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) [2021-03-24 22:14:36,060 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:14:36,060 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 117 [2021-03-24 22:14:36,060 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:14:36,068 INFO L129 PetriNetUnfolder]: 0/58 cut-off events. [2021-03-24 22:14:36,068 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:36,068 INFO L84 FinitePrefix]: Finished finitePrefix Result has 551 conditions, 58 events. 0/58 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 64 event pairs, 0 based on Foata normal form. 29/87 useless extension candidates. Maximal degree in co-relation 0. Up to 29 conditions per place. [2021-03-24 22:14:36,068 INFO L132 encePairwiseOnDemand]: 115/117 looper letters, 0 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2021-03-24 22:14:36,068 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 58 transitions, 1014 flow [2021-03-24 22:14:36,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:14:36,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:14:36,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 344 transitions. [2021-03-24 22:14:36,069 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.98005698005698 [2021-03-24 22:14:36,069 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 344 transitions. [2021-03-24 22:14:36,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 344 transitions. [2021-03-24 22:14:36,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:14:36,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 344 transitions. [2021-03-24 22:14:36,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 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) [2021-03-24 22:14:36,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 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) [2021-03-24 22:14:36,071 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 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) [2021-03-24 22:14:36,071 INFO L185 Difference]: Start difference. First operand has 116 places, 59 transitions, 1014 flow. Second operand 3 states and 344 transitions. [2021-03-24 22:14:36,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 58 transitions, 1014 flow [2021-03-24 22:14:36,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 58 transitions, 258 flow, removed 378 selfloop flow, removed 0 redundant places. [2021-03-24 22:14:36,080 INFO L241 Difference]: Finished difference. Result has 117 places, 58 transitions, 258 flow [2021-03-24 22:14:36,080 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=258, PETRI_PLACES=117, PETRI_TRANSITIONS=58} [2021-03-24 22:14:36,080 INFO L343 CegarLoopForPetriNet]: 116 programPoint places, 1 predicate places. [2021-03-24 22:14:36,080 INFO L480 AbstractCegarLoop]: Abstraction has has 117 places, 58 transitions, 258 flow [2021-03-24 22:14:36,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 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) [2021-03-24 22:14:36,081 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:36,081 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:14:36,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-03-24 22:14:36,081 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:36,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:36,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1008561454, now seen corresponding path program 1 times [2021-03-24 22:14:36,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:36,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352809577] [2021-03-24 22:14:36,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:36,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:36,086 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:36,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:36,087 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:36,090 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:14:36,090 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:14:36,090 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-03-24 22:14:36,090 WARN L342 ceAbstractionStarter]: 28 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:14:36,090 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 29 thread instances. [2021-03-24 22:14:36,117 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:14:36,117 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:14:36,117 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:14:36,117 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:14:36,117 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:14:36,117 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:14:36,118 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:14:36,118 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:14:36,118 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:14:36,118 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:14:36,119 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 151 places, 92 transitions, 1141 flow [2021-03-24 22:14:36,135 INFO L129 PetriNetUnfolder]: 0/179 cut-off events. [2021-03-24 22:14:36,135 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:36,135 INFO L84 FinitePrefix]: Finished finitePrefix Result has 702 conditions, 179 events. 0/179 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 587 event pairs, 0 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2021-03-24 22:14:36,135 INFO L82 GeneralOperation]: Start removeDead. Operand has 151 places, 92 transitions, 1141 flow [2021-03-24 22:14:36,136 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 149 places, 90 transitions, 1137 flow [2021-03-24 22:14:36,136 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:14:36,136 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 149 places, 90 transitions, 1137 flow [2021-03-24 22:14:36,136 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 149 places, 90 transitions, 1137 flow [2021-03-24 22:14:36,137 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 149 places, 90 transitions, 1137 flow [2021-03-24 22:14:36,149 INFO L129 PetriNetUnfolder]: 0/119 cut-off events. [2021-03-24 22:14:36,149 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:36,149 INFO L84 FinitePrefix]: Finished finitePrefix Result has 642 conditions, 119 events. 0/119 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 333 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2021-03-24 22:14:36,152 INFO L142 LiptonReduction]: Number of co-enabled transitions 5104 [2021-03-24 22:14:37,354 INFO L154 LiptonReduction]: Checked pairs total: 2088 [2021-03-24 22:14:37,354 INFO L156 LiptonReduction]: Total number of compositions: 29 [2021-03-24 22:14:37,354 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1218 [2021-03-24 22:14:37,355 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-03-24 22:14:37,355 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:37,355 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:37,355 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:14:37,355 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:37,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:37,356 INFO L82 PathProgramCache]: Analyzing trace with hash 60451, now seen corresponding path program 1 times [2021-03-24 22:14:37,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:37,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137352434] [2021-03-24 22:14:37,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:37,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:14:37,361 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:14:37,362 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:14:37,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:14:37,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137352434] [2021-03-24 22:14:37,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:14:37,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:14:37,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540052480] [2021-03-24 22:14:37,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:14:37,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:14:37,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:14:37,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:14:37,366 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 121 [2021-03-24 22:14:37,366 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 61 transitions, 1079 flow. Second operand has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 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) [2021-03-24 22:14:37,366 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:14:37,366 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 121 [2021-03-24 22:14:37,366 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:14:37,377 INFO L129 PetriNetUnfolder]: 0/60 cut-off events. [2021-03-24 22:14:37,377 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:37,377 INFO L84 FinitePrefix]: Finished finitePrefix Result has 585 conditions, 60 events. 0/60 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 55 event pairs, 0 based on Foata normal form. 30/90 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2021-03-24 22:14:37,377 INFO L132 encePairwiseOnDemand]: 119/121 looper letters, 0 selfloop transitions, 1 changer transitions 0/60 dead transitions. [2021-03-24 22:14:37,377 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 60 transitions, 1079 flow [2021-03-24 22:14:37,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:14:37,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:14:37,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 356 transitions. [2021-03-24 22:14:37,378 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9807162534435262 [2021-03-24 22:14:37,378 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 356 transitions. [2021-03-24 22:14:37,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 356 transitions. [2021-03-24 22:14:37,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:14:37,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 356 transitions. [2021-03-24 22:14:37,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 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) [2021-03-24 22:14:37,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 121.0) internal successors, (484), 4 states have internal predecessors, (484), 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) [2021-03-24 22:14:37,380 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 121.0) internal successors, (484), 4 states have internal predecessors, (484), 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) [2021-03-24 22:14:37,380 INFO L185 Difference]: Start difference. First operand has 120 places, 61 transitions, 1079 flow. Second operand 3 states and 356 transitions. [2021-03-24 22:14:37,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 60 transitions, 1079 flow [2021-03-24 22:14:37,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 60 transitions, 267 flow, removed 406 selfloop flow, removed 0 redundant places. [2021-03-24 22:14:37,391 INFO L241 Difference]: Finished difference. Result has 121 places, 60 transitions, 267 flow [2021-03-24 22:14:37,391 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=121, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=267, PETRI_PLACES=121, PETRI_TRANSITIONS=60} [2021-03-24 22:14:37,391 INFO L343 CegarLoopForPetriNet]: 120 programPoint places, 1 predicate places. [2021-03-24 22:14:37,391 INFO L480 AbstractCegarLoop]: Abstraction has has 121 places, 60 transitions, 267 flow [2021-03-24 22:14:37,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 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) [2021-03-24 22:14:37,392 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:37,392 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:14:37,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-03-24 22:14:37,392 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:37,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:37,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1949254963, now seen corresponding path program 1 times [2021-03-24 22:14:37,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:37,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409203084] [2021-03-24 22:14:37,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:37,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:37,398 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:37,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:37,399 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:37,402 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:14:37,402 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:14:37,402 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-03-24 22:14:37,403 WARN L342 ceAbstractionStarter]: 29 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:14:37,403 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 30 thread instances. [2021-03-24 22:14:37,433 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:14:37,433 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:14:37,433 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:14:37,434 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:14:37,434 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:14:37,434 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:14:37,434 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:14:37,434 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:14:37,434 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:14:37,434 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:14:37,435 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 156 places, 95 transitions, 1210 flow [2021-03-24 22:14:37,453 INFO L129 PetriNetUnfolder]: 0/185 cut-off events. [2021-03-24 22:14:37,453 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:37,453 INFO L84 FinitePrefix]: Finished finitePrefix Result has 741 conditions, 185 events. 0/185 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 599 event pairs, 0 based on Foata normal form. 0/154 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2021-03-24 22:14:37,453 INFO L82 GeneralOperation]: Start removeDead. Operand has 156 places, 95 transitions, 1210 flow [2021-03-24 22:14:37,454 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 93 transitions, 1206 flow [2021-03-24 22:14:37,454 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:14:37,455 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 154 places, 93 transitions, 1206 flow [2021-03-24 22:14:37,455 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 154 places, 93 transitions, 1206 flow [2021-03-24 22:14:37,455 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 154 places, 93 transitions, 1206 flow [2021-03-24 22:14:37,469 INFO L129 PetriNetUnfolder]: 0/123 cut-off events. [2021-03-24 22:14:37,470 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:37,470 INFO L84 FinitePrefix]: Finished finitePrefix Result has 679 conditions, 123 events. 0/123 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 365 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2021-03-24 22:14:37,474 INFO L142 LiptonReduction]: Number of co-enabled transitions 5460 [2021-03-24 22:14:38,701 INFO L154 LiptonReduction]: Checked pairs total: 2235 [2021-03-24 22:14:38,701 INFO L156 LiptonReduction]: Total number of compositions: 30 [2021-03-24 22:14:38,701 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1247 [2021-03-24 22:14:38,702 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:14:38,702 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:38,702 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:38,702 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:14:38,702 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:38,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:38,703 INFO L82 PathProgramCache]: Analyzing trace with hash 64419, now seen corresponding path program 1 times [2021-03-24 22:14:38,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:38,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279162408] [2021-03-24 22:14:38,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:38,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:14:38,711 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:14:38,711 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:14:38,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:14:38,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279162408] [2021-03-24 22:14:38,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:14:38,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:14:38,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337185682] [2021-03-24 22:14:38,713 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:14:38,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:14:38,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:14:38,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:14:38,714 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 125 [2021-03-24 22:14:38,714 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 63 transitions, 1146 flow. Second operand has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 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) [2021-03-24 22:14:38,714 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:14:38,714 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 125 [2021-03-24 22:14:38,714 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:14:38,724 INFO L129 PetriNetUnfolder]: 0/62 cut-off events. [2021-03-24 22:14:38,724 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:38,724 INFO L84 FinitePrefix]: Finished finitePrefix Result has 620 conditions, 62 events. 0/62 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 52 event pairs, 0 based on Foata normal form. 31/93 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2021-03-24 22:14:38,724 INFO L132 encePairwiseOnDemand]: 123/125 looper letters, 0 selfloop transitions, 1 changer transitions 0/62 dead transitions. [2021-03-24 22:14:38,724 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 62 transitions, 1146 flow [2021-03-24 22:14:38,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:14:38,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:14:38,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 368 transitions. [2021-03-24 22:14:38,725 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9813333333333333 [2021-03-24 22:14:38,725 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 368 transitions. [2021-03-24 22:14:38,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 368 transitions. [2021-03-24 22:14:38,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:14:38,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 368 transitions. [2021-03-24 22:14:38,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 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) [2021-03-24 22:14:38,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 125.0) internal successors, (500), 4 states have internal predecessors, (500), 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) [2021-03-24 22:14:38,727 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 125.0) internal successors, (500), 4 states have internal predecessors, (500), 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) [2021-03-24 22:14:38,727 INFO L185 Difference]: Start difference. First operand has 124 places, 63 transitions, 1146 flow. Second operand 3 states and 368 transitions. [2021-03-24 22:14:38,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 62 transitions, 1146 flow [2021-03-24 22:14:38,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 62 transitions, 276 flow, removed 435 selfloop flow, removed 0 redundant places. [2021-03-24 22:14:38,739 INFO L241 Difference]: Finished difference. Result has 125 places, 62 transitions, 276 flow [2021-03-24 22:14:38,739 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=276, PETRI_PLACES=125, PETRI_TRANSITIONS=62} [2021-03-24 22:14:38,739 INFO L343 CegarLoopForPetriNet]: 124 programPoint places, 1 predicate places. [2021-03-24 22:14:38,739 INFO L480 AbstractCegarLoop]: Abstraction has has 125 places, 62 transitions, 276 flow [2021-03-24 22:14:38,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 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) [2021-03-24 22:14:38,739 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:38,740 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:14:38,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-03-24 22:14:38,740 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:38,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:38,740 INFO L82 PathProgramCache]: Analyzing trace with hash 2018076821, now seen corresponding path program 1 times [2021-03-24 22:14:38,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:38,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633551432] [2021-03-24 22:14:38,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:38,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:38,745 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:38,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:38,747 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:38,750 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:14:38,750 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:14:38,750 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-03-24 22:14:38,750 WARN L342 ceAbstractionStarter]: 30 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:14:38,750 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 31 thread instances. [2021-03-24 22:14:38,778 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:14:38,778 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:14:38,779 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:14:38,779 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:14:38,779 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:14:38,779 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:14:38,779 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:14:38,779 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:14:38,779 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:14:38,779 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:14:38,780 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 161 places, 98 transitions, 1281 flow [2021-03-24 22:14:38,797 INFO L129 PetriNetUnfolder]: 0/191 cut-off events. [2021-03-24 22:14:38,798 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:38,798 INFO L84 FinitePrefix]: Finished finitePrefix Result has 781 conditions, 191 events. 0/191 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 620 event pairs, 0 based on Foata normal form. 0/159 useless extension candidates. Maximal degree in co-relation 0. Up to 32 conditions per place. [2021-03-24 22:14:38,798 INFO L82 GeneralOperation]: Start removeDead. Operand has 161 places, 98 transitions, 1281 flow [2021-03-24 22:14:38,799 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 159 places, 96 transitions, 1277 flow [2021-03-24 22:14:38,799 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:14:38,799 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 159 places, 96 transitions, 1277 flow [2021-03-24 22:14:38,799 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 159 places, 96 transitions, 1277 flow [2021-03-24 22:14:38,800 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 159 places, 96 transitions, 1277 flow [2021-03-24 22:14:38,814 INFO L129 PetriNetUnfolder]: 0/127 cut-off events. [2021-03-24 22:14:38,814 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:38,814 INFO L84 FinitePrefix]: Finished finitePrefix Result has 717 conditions, 127 events. 0/127 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 353 event pairs, 0 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 0. Up to 32 conditions per place. [2021-03-24 22:14:38,818 INFO L142 LiptonReduction]: Number of co-enabled transitions 5828 [2021-03-24 22:14:40,111 INFO L154 LiptonReduction]: Checked pairs total: 2387 [2021-03-24 22:14:40,111 INFO L156 LiptonReduction]: Total number of compositions: 31 [2021-03-24 22:14:40,111 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1312 [2021-03-24 22:14:40,112 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:14:40,112 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:40,112 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:40,112 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:14:40,112 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:40,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:40,113 INFO L82 PathProgramCache]: Analyzing trace with hash 68515, now seen corresponding path program 1 times [2021-03-24 22:14:40,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:40,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773735908] [2021-03-24 22:14:40,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:40,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:14:40,119 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:14:40,119 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:14:40,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:14:40,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773735908] [2021-03-24 22:14:40,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:14:40,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:14:40,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314443380] [2021-03-24 22:14:40,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:14:40,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:14:40,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:14:40,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:14:40,123 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 129 [2021-03-24 22:14:40,123 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 65 transitions, 1215 flow. Second operand has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 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) [2021-03-24 22:14:40,123 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:14:40,124 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 129 [2021-03-24 22:14:40,124 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:14:40,134 INFO L129 PetriNetUnfolder]: 0/64 cut-off events. [2021-03-24 22:14:40,134 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:40,134 INFO L84 FinitePrefix]: Finished finitePrefix Result has 656 conditions, 64 events. 0/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 63 event pairs, 0 based on Foata normal form. 32/96 useless extension candidates. Maximal degree in co-relation 0. Up to 32 conditions per place. [2021-03-24 22:14:40,134 INFO L132 encePairwiseOnDemand]: 127/129 looper letters, 0 selfloop transitions, 1 changer transitions 0/64 dead transitions. [2021-03-24 22:14:40,134 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 64 transitions, 1215 flow [2021-03-24 22:14:40,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:14:40,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:14:40,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 380 transitions. [2021-03-24 22:14:40,135 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9819121447028424 [2021-03-24 22:14:40,136 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 380 transitions. [2021-03-24 22:14:40,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 380 transitions. [2021-03-24 22:14:40,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:14:40,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 380 transitions. [2021-03-24 22:14:40,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 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) [2021-03-24 22:14:40,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 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) [2021-03-24 22:14:40,137 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 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) [2021-03-24 22:14:40,137 INFO L185 Difference]: Start difference. First operand has 128 places, 65 transitions, 1215 flow. Second operand 3 states and 380 transitions. [2021-03-24 22:14:40,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 64 transitions, 1215 flow [2021-03-24 22:14:40,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 64 transitions, 285 flow, removed 465 selfloop flow, removed 0 redundant places. [2021-03-24 22:14:40,150 INFO L241 Difference]: Finished difference. Result has 129 places, 64 transitions, 285 flow [2021-03-24 22:14:40,150 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=285, PETRI_PLACES=129, PETRI_TRANSITIONS=64} [2021-03-24 22:14:40,150 INFO L343 CegarLoopForPetriNet]: 128 programPoint places, 1 predicate places. [2021-03-24 22:14:40,150 INFO L480 AbstractCegarLoop]: Abstraction has has 129 places, 64 transitions, 285 flow [2021-03-24 22:14:40,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 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) [2021-03-24 22:14:40,150 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:40,150 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:14:40,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-03-24 22:14:40,150 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:40,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:40,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1642907058, now seen corresponding path program 1 times [2021-03-24 22:14:40,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:40,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554998139] [2021-03-24 22:14:40,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:40,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:40,157 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:40,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:40,159 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:40,162 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:14:40,162 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:14:40,162 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-03-24 22:14:40,163 WARN L342 ceAbstractionStarter]: 31 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:14:40,163 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 32 thread instances. [2021-03-24 22:14:40,210 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:14:40,211 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:14:40,211 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:14:40,211 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:14:40,211 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:14:40,211 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:14:40,211 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:14:40,212 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:14:40,212 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:14:40,212 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:14:40,213 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 166 places, 101 transitions, 1354 flow [2021-03-24 22:14:40,232 INFO L129 PetriNetUnfolder]: 0/197 cut-off events. [2021-03-24 22:14:40,232 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:40,232 INFO L84 FinitePrefix]: Finished finitePrefix Result has 822 conditions, 197 events. 0/197 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 637 event pairs, 0 based on Foata normal form. 0/164 useless extension candidates. Maximal degree in co-relation 0. Up to 33 conditions per place. [2021-03-24 22:14:40,233 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 101 transitions, 1354 flow [2021-03-24 22:14:40,234 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 99 transitions, 1350 flow [2021-03-24 22:14:40,234 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:14:40,234 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 164 places, 99 transitions, 1350 flow [2021-03-24 22:14:40,234 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 164 places, 99 transitions, 1350 flow [2021-03-24 22:14:40,235 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 164 places, 99 transitions, 1350 flow [2021-03-24 22:14:40,250 INFO L129 PetriNetUnfolder]: 0/131 cut-off events. [2021-03-24 22:14:40,250 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:40,250 INFO L84 FinitePrefix]: Finished finitePrefix Result has 756 conditions, 131 events. 0/131 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 361 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 0. Up to 33 conditions per place. [2021-03-24 22:14:40,254 INFO L142 LiptonReduction]: Number of co-enabled transitions 6208 [2021-03-24 22:14:41,609 INFO L154 LiptonReduction]: Checked pairs total: 2544 [2021-03-24 22:14:41,609 INFO L156 LiptonReduction]: Total number of compositions: 32 [2021-03-24 22:14:41,610 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1376 [2021-03-24 22:14:41,610 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:14:41,610 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:41,610 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:41,611 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:14:41,611 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:41,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:41,611 INFO L82 PathProgramCache]: Analyzing trace with hash 72739, now seen corresponding path program 1 times [2021-03-24 22:14:41,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:41,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252414227] [2021-03-24 22:14:41,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:41,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:14:41,616 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:14:41,616 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:14:41,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:14:41,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252414227] [2021-03-24 22:14:41,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:14:41,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:14:41,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85402577] [2021-03-24 22:14:41,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:14:41,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:14:41,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:14:41,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:14:41,620 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 133 [2021-03-24 22:14:41,620 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 67 transitions, 1286 flow. Second operand has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 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) [2021-03-24 22:14:41,620 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:14:41,620 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 133 [2021-03-24 22:14:41,620 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:14:41,631 INFO L129 PetriNetUnfolder]: 0/66 cut-off events. [2021-03-24 22:14:41,631 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:41,631 INFO L84 FinitePrefix]: Finished finitePrefix Result has 693 conditions, 66 events. 0/66 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 68 event pairs, 0 based on Foata normal form. 33/99 useless extension candidates. Maximal degree in co-relation 0. Up to 33 conditions per place. [2021-03-24 22:14:41,631 INFO L132 encePairwiseOnDemand]: 131/133 looper letters, 0 selfloop transitions, 1 changer transitions 0/66 dead transitions. [2021-03-24 22:14:41,632 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 66 transitions, 1286 flow [2021-03-24 22:14:41,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:14:41,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:14:41,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 392 transitions. [2021-03-24 22:14:41,633 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9824561403508771 [2021-03-24 22:14:41,633 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 392 transitions. [2021-03-24 22:14:41,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 392 transitions. [2021-03-24 22:14:41,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:14:41,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 392 transitions. [2021-03-24 22:14:41,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 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) [2021-03-24 22:14:41,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 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) [2021-03-24 22:14:41,635 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 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) [2021-03-24 22:14:41,635 INFO L185 Difference]: Start difference. First operand has 132 places, 67 transitions, 1286 flow. Second operand 3 states and 392 transitions. [2021-03-24 22:14:41,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 66 transitions, 1286 flow [2021-03-24 22:14:41,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 66 transitions, 294 flow, removed 496 selfloop flow, removed 0 redundant places. [2021-03-24 22:14:41,648 INFO L241 Difference]: Finished difference. Result has 133 places, 66 transitions, 294 flow [2021-03-24 22:14:41,648 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=294, PETRI_PLACES=133, PETRI_TRANSITIONS=66} [2021-03-24 22:14:41,648 INFO L343 CegarLoopForPetriNet]: 132 programPoint places, 1 predicate places. [2021-03-24 22:14:41,648 INFO L480 AbstractCegarLoop]: Abstraction has has 133 places, 66 transitions, 294 flow [2021-03-24 22:14:41,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 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) [2021-03-24 22:14:41,649 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:41,649 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:14:41,649 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-03-24 22:14:41,649 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:41,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:41,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1398026328, now seen corresponding path program 1 times [2021-03-24 22:14:41,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:41,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300318147] [2021-03-24 22:14:41,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:41,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:41,654 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:41,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:41,656 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:41,659 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:14:41,659 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:14:41,659 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-03-24 22:14:41,659 WARN L342 ceAbstractionStarter]: 32 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:14:41,660 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 33 thread instances. [2021-03-24 22:14:41,691 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:14:41,692 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:14:41,692 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:14:41,692 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:14:41,692 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:14:41,692 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:14:41,692 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:14:41,692 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:14:41,692 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:14:41,692 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:14:41,693 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 171 places, 104 transitions, 1429 flow [2021-03-24 22:14:41,713 INFO L129 PetriNetUnfolder]: 0/203 cut-off events. [2021-03-24 22:14:41,713 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:41,713 INFO L84 FinitePrefix]: Finished finitePrefix Result has 864 conditions, 203 events. 0/203 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 653 event pairs, 0 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 0. Up to 34 conditions per place. [2021-03-24 22:14:41,713 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 104 transitions, 1429 flow [2021-03-24 22:14:41,714 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 169 places, 102 transitions, 1425 flow [2021-03-24 22:14:41,714 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:14:41,714 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 169 places, 102 transitions, 1425 flow [2021-03-24 22:14:41,715 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 169 places, 102 transitions, 1425 flow [2021-03-24 22:14:41,715 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 169 places, 102 transitions, 1425 flow [2021-03-24 22:14:41,731 INFO L129 PetriNetUnfolder]: 0/135 cut-off events. [2021-03-24 22:14:41,731 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:41,731 INFO L84 FinitePrefix]: Finished finitePrefix Result has 796 conditions, 135 events. 0/135 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 432 event pairs, 0 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 0. Up to 34 conditions per place. [2021-03-24 22:14:41,735 INFO L142 LiptonReduction]: Number of co-enabled transitions 6600 [2021-03-24 22:14:43,193 INFO L154 LiptonReduction]: Checked pairs total: 2706 [2021-03-24 22:14:43,194 INFO L156 LiptonReduction]: Total number of compositions: 33 [2021-03-24 22:14:43,194 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1480 [2021-03-24 22:14:43,195 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-03-24 22:14:43,195 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:43,195 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:43,195 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:14:43,195 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:43,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:43,195 INFO L82 PathProgramCache]: Analyzing trace with hash 77091, now seen corresponding path program 1 times [2021-03-24 22:14:43,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:43,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346247182] [2021-03-24 22:14:43,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:43,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:14:43,202 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:14:43,202 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:14:43,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:14:43,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346247182] [2021-03-24 22:14:43,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:14:43,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:14:43,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942167518] [2021-03-24 22:14:43,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:14:43,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:14:43,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:14:43,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:14:43,206 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 137 [2021-03-24 22:14:43,206 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 69 transitions, 1359 flow. Second operand has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 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) [2021-03-24 22:14:43,206 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:14:43,206 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 137 [2021-03-24 22:14:43,206 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:14:43,219 INFO L129 PetriNetUnfolder]: 0/68 cut-off events. [2021-03-24 22:14:43,220 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:43,220 INFO L84 FinitePrefix]: Finished finitePrefix Result has 731 conditions, 68 events. 0/68 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 67 event pairs, 0 based on Foata normal form. 34/102 useless extension candidates. Maximal degree in co-relation 0. Up to 34 conditions per place. [2021-03-24 22:14:43,220 INFO L132 encePairwiseOnDemand]: 135/137 looper letters, 0 selfloop transitions, 1 changer transitions 0/68 dead transitions. [2021-03-24 22:14:43,220 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 68 transitions, 1359 flow [2021-03-24 22:14:43,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:14:43,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:14:43,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 404 transitions. [2021-03-24 22:14:43,221 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9829683698296837 [2021-03-24 22:14:43,221 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 404 transitions. [2021-03-24 22:14:43,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 404 transitions. [2021-03-24 22:14:43,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:14:43,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 404 transitions. [2021-03-24 22:14:43,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 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) [2021-03-24 22:14:43,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 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) [2021-03-24 22:14:43,224 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 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) [2021-03-24 22:14:43,224 INFO L185 Difference]: Start difference. First operand has 136 places, 69 transitions, 1359 flow. Second operand 3 states and 404 transitions. [2021-03-24 22:14:43,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 68 transitions, 1359 flow [2021-03-24 22:14:43,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 68 transitions, 303 flow, removed 528 selfloop flow, removed 0 redundant places. [2021-03-24 22:14:43,238 INFO L241 Difference]: Finished difference. Result has 137 places, 68 transitions, 303 flow [2021-03-24 22:14:43,238 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=303, PETRI_PLACES=137, PETRI_TRANSITIONS=68} [2021-03-24 22:14:43,238 INFO L343 CegarLoopForPetriNet]: 136 programPoint places, 1 predicate places. [2021-03-24 22:14:43,239 INFO L480 AbstractCegarLoop]: Abstraction has has 137 places, 68 transitions, 303 flow [2021-03-24 22:14:43,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 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) [2021-03-24 22:14:43,239 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:43,239 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:14:43,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-03-24 22:14:43,239 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:43,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:43,239 INFO L82 PathProgramCache]: Analyzing trace with hash -103388295, now seen corresponding path program 1 times [2021-03-24 22:14:43,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:43,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646151520] [2021-03-24 22:14:43,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:43,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:43,245 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:43,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:43,247 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:43,251 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:14:43,251 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:14:43,251 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-03-24 22:14:43,251 WARN L342 ceAbstractionStarter]: 33 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:14:43,251 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 34 thread instances. [2021-03-24 22:14:43,286 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:14:43,286 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:14:43,286 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:14:43,287 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:14:43,287 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:14:43,287 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:14:43,287 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:14:43,287 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:14:43,287 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:14:43,287 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:14:43,293 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 176 places, 107 transitions, 1506 flow [2021-03-24 22:14:43,314 INFO L129 PetriNetUnfolder]: 0/209 cut-off events. [2021-03-24 22:14:43,314 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:43,314 INFO L84 FinitePrefix]: Finished finitePrefix Result has 907 conditions, 209 events. 0/209 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 676 event pairs, 0 based on Foata normal form. 0/174 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2021-03-24 22:14:43,314 INFO L82 GeneralOperation]: Start removeDead. Operand has 176 places, 107 transitions, 1506 flow [2021-03-24 22:14:43,315 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 174 places, 105 transitions, 1502 flow [2021-03-24 22:14:43,316 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:14:43,316 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 174 places, 105 transitions, 1502 flow [2021-03-24 22:14:43,316 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 174 places, 105 transitions, 1502 flow [2021-03-24 22:14:43,317 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 174 places, 105 transitions, 1502 flow [2021-03-24 22:14:43,333 INFO L129 PetriNetUnfolder]: 0/139 cut-off events. [2021-03-24 22:14:43,333 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:43,333 INFO L84 FinitePrefix]: Finished finitePrefix Result has 837 conditions, 139 events. 0/139 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 359 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2021-03-24 22:14:43,338 INFO L142 LiptonReduction]: Number of co-enabled transitions 7004 [2021-03-24 22:14:44,930 INFO L154 LiptonReduction]: Checked pairs total: 2873 [2021-03-24 22:14:44,930 INFO L156 LiptonReduction]: Total number of compositions: 34 [2021-03-24 22:14:44,931 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1615 [2021-03-24 22:14:44,931 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:14:44,932 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:44,932 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:44,932 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:14:44,932 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:44,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:44,932 INFO L82 PathProgramCache]: Analyzing trace with hash 81571, now seen corresponding path program 1 times [2021-03-24 22:14:44,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:44,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173931297] [2021-03-24 22:14:44,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:44,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:14:44,939 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:14:44,939 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:14:44,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:14:44,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173931297] [2021-03-24 22:14:44,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:14:44,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:14:44,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53796992] [2021-03-24 22:14:44,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:14:44,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:14:44,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:14:44,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:14:44,943 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 141 [2021-03-24 22:14:44,943 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 71 transitions, 1434 flow. Second operand has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 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) [2021-03-24 22:14:44,943 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:14:44,943 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 141 [2021-03-24 22:14:44,944 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:14:44,956 INFO L129 PetriNetUnfolder]: 0/70 cut-off events. [2021-03-24 22:14:44,956 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:44,956 INFO L84 FinitePrefix]: Finished finitePrefix Result has 770 conditions, 70 events. 0/70 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 76 event pairs, 0 based on Foata normal form. 35/105 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2021-03-24 22:14:44,956 INFO L132 encePairwiseOnDemand]: 139/141 looper letters, 0 selfloop transitions, 1 changer transitions 0/70 dead transitions. [2021-03-24 22:14:44,956 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 70 transitions, 1434 flow [2021-03-24 22:14:44,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:14:44,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:14:44,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 416 transitions. [2021-03-24 22:14:44,958 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.983451536643026 [2021-03-24 22:14:44,958 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 416 transitions. [2021-03-24 22:14:44,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 416 transitions. [2021-03-24 22:14:44,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:14:44,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 416 transitions. [2021-03-24 22:14:44,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 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) [2021-03-24 22:14:44,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 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) [2021-03-24 22:14:44,960 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 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) [2021-03-24 22:14:44,960 INFO L185 Difference]: Start difference. First operand has 140 places, 71 transitions, 1434 flow. Second operand 3 states and 416 transitions. [2021-03-24 22:14:44,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 70 transitions, 1434 flow [2021-03-24 22:14:44,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 70 transitions, 312 flow, removed 561 selfloop flow, removed 0 redundant places. [2021-03-24 22:14:44,974 INFO L241 Difference]: Finished difference. Result has 141 places, 70 transitions, 312 flow [2021-03-24 22:14:44,974 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=312, PETRI_PLACES=141, PETRI_TRANSITIONS=70} [2021-03-24 22:14:44,974 INFO L343 CegarLoopForPetriNet]: 140 programPoint places, 1 predicate places. [2021-03-24 22:14:44,974 INFO L480 AbstractCegarLoop]: Abstraction has has 141 places, 70 transitions, 312 flow [2021-03-24 22:14:44,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 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) [2021-03-24 22:14:44,974 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:44,974 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:14:44,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-03-24 22:14:44,975 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:44,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:44,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1249775589, now seen corresponding path program 1 times [2021-03-24 22:14:44,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:44,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306028901] [2021-03-24 22:14:44,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:44,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:44,982 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:44,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:44,983 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:44,988 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:14:44,988 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:14:44,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-03-24 22:14:44,988 WARN L342 ceAbstractionStarter]: 34 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:14:44,988 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 35 thread instances. [2021-03-24 22:14:45,023 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:14:45,023 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:14:45,024 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:14:45,024 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:14:45,024 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:14:45,024 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:14:45,024 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:14:45,024 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:14:45,024 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:14:45,024 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:14:45,025 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 181 places, 110 transitions, 1585 flow [2021-03-24 22:14:45,047 INFO L129 PetriNetUnfolder]: 0/215 cut-off events. [2021-03-24 22:14:45,047 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:45,048 INFO L84 FinitePrefix]: Finished finitePrefix Result has 951 conditions, 215 events. 0/215 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 710 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 0. Up to 36 conditions per place. [2021-03-24 22:14:45,048 INFO L82 GeneralOperation]: Start removeDead. Operand has 181 places, 110 transitions, 1585 flow [2021-03-24 22:14:45,049 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 179 places, 108 transitions, 1581 flow [2021-03-24 22:14:45,049 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:14:45,049 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 108 transitions, 1581 flow [2021-03-24 22:14:45,049 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 108 transitions, 1581 flow [2021-03-24 22:14:45,050 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 179 places, 108 transitions, 1581 flow [2021-03-24 22:14:45,067 INFO L129 PetriNetUnfolder]: 0/143 cut-off events. [2021-03-24 22:14:45,067 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:45,068 INFO L84 FinitePrefix]: Finished finitePrefix Result has 879 conditions, 143 events. 0/143 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 379 event pairs, 0 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 0. Up to 36 conditions per place. [2021-03-24 22:14:45,073 INFO L142 LiptonReduction]: Number of co-enabled transitions 7420 [2021-03-24 22:14:46,679 INFO L154 LiptonReduction]: Checked pairs total: 3045 [2021-03-24 22:14:46,679 INFO L156 LiptonReduction]: Total number of compositions: 35 [2021-03-24 22:14:46,680 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1631 [2021-03-24 22:14:46,680 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:14:46,680 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:46,681 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:46,681 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:14:46,681 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:46,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:46,681 INFO L82 PathProgramCache]: Analyzing trace with hash 86179, now seen corresponding path program 1 times [2021-03-24 22:14:46,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:46,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264600741] [2021-03-24 22:14:46,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:46,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:14:46,687 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:14:46,687 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:14:46,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:14:46,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264600741] [2021-03-24 22:14:46,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:14:46,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:14:46,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048272364] [2021-03-24 22:14:46,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:14:46,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:14:46,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:14:46,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:14:46,690 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 145 [2021-03-24 22:14:46,690 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 73 transitions, 1511 flow. Second operand has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 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) [2021-03-24 22:14:46,690 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:14:46,690 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 145 [2021-03-24 22:14:46,691 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:14:46,738 INFO L129 PetriNetUnfolder]: 0/72 cut-off events. [2021-03-24 22:14:46,738 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:46,738 INFO L84 FinitePrefix]: Finished finitePrefix Result has 810 conditions, 72 events. 0/72 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 71 event pairs, 0 based on Foata normal form. 36/108 useless extension candidates. Maximal degree in co-relation 0. Up to 36 conditions per place. [2021-03-24 22:14:46,738 INFO L132 encePairwiseOnDemand]: 143/145 looper letters, 0 selfloop transitions, 1 changer transitions 0/72 dead transitions. [2021-03-24 22:14:46,738 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 72 transitions, 1511 flow [2021-03-24 22:14:46,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:14:46,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:14:46,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 428 transitions. [2021-03-24 22:14:46,739 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9839080459770115 [2021-03-24 22:14:46,739 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 428 transitions. [2021-03-24 22:14:46,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 428 transitions. [2021-03-24 22:14:46,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:14:46,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 428 transitions. [2021-03-24 22:14:46,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 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) [2021-03-24 22:14:46,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 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) [2021-03-24 22:14:46,742 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 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) [2021-03-24 22:14:46,743 INFO L185 Difference]: Start difference. First operand has 144 places, 73 transitions, 1511 flow. Second operand 3 states and 428 transitions. [2021-03-24 22:14:46,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 72 transitions, 1511 flow [2021-03-24 22:14:46,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 72 transitions, 321 flow, removed 595 selfloop flow, removed 0 redundant places. [2021-03-24 22:14:46,755 INFO L241 Difference]: Finished difference. Result has 145 places, 72 transitions, 321 flow [2021-03-24 22:14:46,755 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=321, PETRI_PLACES=145, PETRI_TRANSITIONS=72} [2021-03-24 22:14:46,755 INFO L343 CegarLoopForPetriNet]: 144 programPoint places, 1 predicate places. [2021-03-24 22:14:46,756 INFO L480 AbstractCegarLoop]: Abstraction has has 145 places, 72 transitions, 321 flow [2021-03-24 22:14:46,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 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) [2021-03-24 22:14:46,756 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:46,756 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:14:46,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-03-24 22:14:46,756 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:46,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:46,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1758155444, now seen corresponding path program 1 times [2021-03-24 22:14:46,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:46,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526340163] [2021-03-24 22:14:46,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:46,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:46,763 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:46,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:46,764 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:46,768 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:14:46,768 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:14:46,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-03-24 22:14:46,768 WARN L342 ceAbstractionStarter]: 35 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:14:46,768 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 36 thread instances. [2021-03-24 22:14:46,798 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:14:46,799 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:14:46,799 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:14:46,799 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:14:46,799 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:14:46,799 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:14:46,799 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:14:46,799 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:14:46,799 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:14:46,799 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:14:46,803 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 186 places, 113 transitions, 1666 flow [2021-03-24 22:14:46,825 INFO L129 PetriNetUnfolder]: 0/221 cut-off events. [2021-03-24 22:14:46,825 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:46,825 INFO L84 FinitePrefix]: Finished finitePrefix Result has 996 conditions, 221 events. 0/221 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 732 event pairs, 0 based on Foata normal form. 0/184 useless extension candidates. Maximal degree in co-relation 0. Up to 37 conditions per place. [2021-03-24 22:14:46,825 INFO L82 GeneralOperation]: Start removeDead. Operand has 186 places, 113 transitions, 1666 flow [2021-03-24 22:14:46,827 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 184 places, 111 transitions, 1662 flow [2021-03-24 22:14:46,827 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:14:46,827 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 184 places, 111 transitions, 1662 flow [2021-03-24 22:14:46,827 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 184 places, 111 transitions, 1662 flow [2021-03-24 22:14:46,828 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 184 places, 111 transitions, 1662 flow [2021-03-24 22:14:46,847 INFO L129 PetriNetUnfolder]: 0/147 cut-off events. [2021-03-24 22:14:46,847 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:46,847 INFO L84 FinitePrefix]: Finished finitePrefix Result has 922 conditions, 147 events. 0/147 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 445 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 0. Up to 37 conditions per place. [2021-03-24 22:14:46,853 INFO L142 LiptonReduction]: Number of co-enabled transitions 7848 [2021-03-24 22:14:48,638 INFO L154 LiptonReduction]: Checked pairs total: 3222 [2021-03-24 22:14:48,638 INFO L156 LiptonReduction]: Total number of compositions: 36 [2021-03-24 22:14:48,638 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1811 [2021-03-24 22:14:48,639 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-03-24 22:14:48,639 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:48,639 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:48,639 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:14:48,639 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:48,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:48,639 INFO L82 PathProgramCache]: Analyzing trace with hash 90915, now seen corresponding path program 1 times [2021-03-24 22:14:48,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:48,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763759382] [2021-03-24 22:14:48,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:48,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:14:48,645 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:14:48,646 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:14:48,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:14:48,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763759382] [2021-03-24 22:14:48,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:14:48,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:14:48,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980725402] [2021-03-24 22:14:48,648 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:14:48,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:14:48,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:14:48,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:14:48,649 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 149 [2021-03-24 22:14:48,649 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 75 transitions, 1590 flow. Second operand has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 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) [2021-03-24 22:14:48,649 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:14:48,649 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 149 [2021-03-24 22:14:48,649 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:14:48,659 INFO L129 PetriNetUnfolder]: 0/74 cut-off events. [2021-03-24 22:14:48,659 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:48,659 INFO L84 FinitePrefix]: Finished finitePrefix Result has 851 conditions, 74 events. 0/74 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 82 event pairs, 0 based on Foata normal form. 37/111 useless extension candidates. Maximal degree in co-relation 0. Up to 37 conditions per place. [2021-03-24 22:14:48,660 INFO L132 encePairwiseOnDemand]: 147/149 looper letters, 0 selfloop transitions, 1 changer transitions 0/74 dead transitions. [2021-03-24 22:14:48,660 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 74 transitions, 1590 flow [2021-03-24 22:14:48,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:14:48,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:14:48,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 440 transitions. [2021-03-24 22:14:48,661 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9843400447427293 [2021-03-24 22:14:48,661 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 440 transitions. [2021-03-24 22:14:48,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 440 transitions. [2021-03-24 22:14:48,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:14:48,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 440 transitions. [2021-03-24 22:14:48,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 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) [2021-03-24 22:14:48,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 149.0) internal successors, (596), 4 states have internal predecessors, (596), 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) [2021-03-24 22:14:48,662 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 149.0) internal successors, (596), 4 states have internal predecessors, (596), 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) [2021-03-24 22:14:48,663 INFO L185 Difference]: Start difference. First operand has 148 places, 75 transitions, 1590 flow. Second operand 3 states and 440 transitions. [2021-03-24 22:14:48,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 74 transitions, 1590 flow [2021-03-24 22:14:48,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 74 transitions, 330 flow, removed 630 selfloop flow, removed 0 redundant places. [2021-03-24 22:14:48,676 INFO L241 Difference]: Finished difference. Result has 149 places, 74 transitions, 330 flow [2021-03-24 22:14:48,676 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=330, PETRI_PLACES=149, PETRI_TRANSITIONS=74} [2021-03-24 22:14:48,676 INFO L343 CegarLoopForPetriNet]: 148 programPoint places, 1 predicate places. [2021-03-24 22:14:48,676 INFO L480 AbstractCegarLoop]: Abstraction has has 149 places, 74 transitions, 330 flow [2021-03-24 22:14:48,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 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) [2021-03-24 22:14:48,677 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:48,677 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:14:48,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-03-24 22:14:48,677 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:48,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:48,677 INFO L82 PathProgramCache]: Analyzing trace with hash -620843554, now seen corresponding path program 1 times [2021-03-24 22:14:48,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:48,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367034787] [2021-03-24 22:14:48,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:48,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:48,683 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:48,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:48,685 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:48,688 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:14:48,688 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:14:48,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-03-24 22:14:48,688 WARN L342 ceAbstractionStarter]: 36 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:14:48,689 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 37 thread instances. [2021-03-24 22:14:48,722 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:14:48,722 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:14:48,722 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:14:48,722 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:14:48,722 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:14:48,722 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:14:48,722 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:14:48,722 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:14:48,723 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:14:48,723 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:14:48,724 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 191 places, 116 transitions, 1749 flow [2021-03-24 22:14:48,741 INFO L129 PetriNetUnfolder]: 0/227 cut-off events. [2021-03-24 22:14:48,741 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:48,741 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1042 conditions, 227 events. 0/227 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 705 event pairs, 0 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 0. Up to 38 conditions per place. [2021-03-24 22:14:48,741 INFO L82 GeneralOperation]: Start removeDead. Operand has 191 places, 116 transitions, 1749 flow [2021-03-24 22:14:48,742 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 114 transitions, 1745 flow [2021-03-24 22:14:48,742 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:14:48,742 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 189 places, 114 transitions, 1745 flow [2021-03-24 22:14:48,742 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 189 places, 114 transitions, 1745 flow [2021-03-24 22:14:48,743 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 189 places, 114 transitions, 1745 flow [2021-03-24 22:14:48,756 INFO L129 PetriNetUnfolder]: 0/151 cut-off events. [2021-03-24 22:14:48,756 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:48,756 INFO L84 FinitePrefix]: Finished finitePrefix Result has 966 conditions, 151 events. 0/151 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 480 event pairs, 0 based on Foata normal form. 0/151 useless extension candidates. Maximal degree in co-relation 0. Up to 38 conditions per place. [2021-03-24 22:14:48,760 INFO L142 LiptonReduction]: Number of co-enabled transitions 8288 [2021-03-24 22:14:50,596 INFO L154 LiptonReduction]: Checked pairs total: 3404 [2021-03-24 22:14:50,597 INFO L156 LiptonReduction]: Total number of compositions: 37 [2021-03-24 22:14:50,597 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1855 [2021-03-24 22:14:50,598 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:14:50,598 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:50,598 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:50,598 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:14:50,598 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:50,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:50,598 INFO L82 PathProgramCache]: Analyzing trace with hash 95779, now seen corresponding path program 1 times [2021-03-24 22:14:50,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:50,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066487481] [2021-03-24 22:14:50,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:50,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:14:50,606 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:14:50,606 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:14:50,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:14:50,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066487481] [2021-03-24 22:14:50,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:14:50,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:14:50,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017108477] [2021-03-24 22:14:50,609 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:14:50,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:14:50,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:14:50,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:14:50,610 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 153 [2021-03-24 22:14:50,610 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 77 transitions, 1671 flow. Second operand has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 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) [2021-03-24 22:14:50,610 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:14:50,610 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 153 [2021-03-24 22:14:50,610 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:14:50,625 INFO L129 PetriNetUnfolder]: 0/76 cut-off events. [2021-03-24 22:14:50,625 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:50,625 INFO L84 FinitePrefix]: Finished finitePrefix Result has 893 conditions, 76 events. 0/76 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 71 event pairs, 0 based on Foata normal form. 38/114 useless extension candidates. Maximal degree in co-relation 0. Up to 38 conditions per place. [2021-03-24 22:14:50,625 INFO L132 encePairwiseOnDemand]: 151/153 looper letters, 0 selfloop transitions, 1 changer transitions 0/76 dead transitions. [2021-03-24 22:14:50,625 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 76 transitions, 1671 flow [2021-03-24 22:14:50,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:14:50,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:14:50,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 452 transitions. [2021-03-24 22:14:50,626 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9847494553376906 [2021-03-24 22:14:50,626 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 452 transitions. [2021-03-24 22:14:50,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 452 transitions. [2021-03-24 22:14:50,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:14:50,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 452 transitions. [2021-03-24 22:14:50,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 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) [2021-03-24 22:14:50,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 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) [2021-03-24 22:14:50,628 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 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) [2021-03-24 22:14:50,629 INFO L185 Difference]: Start difference. First operand has 152 places, 77 transitions, 1671 flow. Second operand 3 states and 452 transitions. [2021-03-24 22:14:50,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 76 transitions, 1671 flow [2021-03-24 22:14:50,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 76 transitions, 339 flow, removed 666 selfloop flow, removed 0 redundant places. [2021-03-24 22:14:50,644 INFO L241 Difference]: Finished difference. Result has 153 places, 76 transitions, 339 flow [2021-03-24 22:14:50,644 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=339, PETRI_PLACES=153, PETRI_TRANSITIONS=76} [2021-03-24 22:14:50,644 INFO L343 CegarLoopForPetriNet]: 152 programPoint places, 1 predicate places. [2021-03-24 22:14:50,644 INFO L480 AbstractCegarLoop]: Abstraction has has 153 places, 76 transitions, 339 flow [2021-03-24 22:14:50,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 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) [2021-03-24 22:14:50,644 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:50,644 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:14:50,645 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-03-24 22:14:50,645 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:50,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:50,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1594398209, now seen corresponding path program 1 times [2021-03-24 22:14:50,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:50,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776399896] [2021-03-24 22:14:50,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:50,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:50,652 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:50,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:50,654 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:50,658 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:14:50,658 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:14:50,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-03-24 22:14:50,658 WARN L342 ceAbstractionStarter]: 37 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:14:50,658 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 38 thread instances. [2021-03-24 22:14:50,697 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:14:50,697 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:14:50,698 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:14:50,698 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:14:50,698 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:14:50,698 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:14:50,698 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:14:50,698 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:14:50,698 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:14:50,698 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:14:50,699 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 196 places, 119 transitions, 1834 flow [2021-03-24 22:14:50,728 INFO L129 PetriNetUnfolder]: 0/233 cut-off events. [2021-03-24 22:14:50,728 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:50,728 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1089 conditions, 233 events. 0/233 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 762 event pairs, 0 based on Foata normal form. 0/194 useless extension candidates. Maximal degree in co-relation 0. Up to 39 conditions per place. [2021-03-24 22:14:50,728 INFO L82 GeneralOperation]: Start removeDead. Operand has 196 places, 119 transitions, 1834 flow [2021-03-24 22:14:50,730 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 194 places, 117 transitions, 1830 flow [2021-03-24 22:14:50,730 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:14:50,730 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 194 places, 117 transitions, 1830 flow [2021-03-24 22:14:50,730 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 194 places, 117 transitions, 1830 flow [2021-03-24 22:14:50,731 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 194 places, 117 transitions, 1830 flow [2021-03-24 22:14:50,753 INFO L129 PetriNetUnfolder]: 0/155 cut-off events. [2021-03-24 22:14:50,753 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:50,754 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1011 conditions, 155 events. 0/155 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 431 event pairs, 0 based on Foata normal form. 0/155 useless extension candidates. Maximal degree in co-relation 0. Up to 39 conditions per place. [2021-03-24 22:14:50,761 INFO L142 LiptonReduction]: Number of co-enabled transitions 8740 [2021-03-24 22:14:52,711 INFO L154 LiptonReduction]: Checked pairs total: 3591 [2021-03-24 22:14:52,711 INFO L156 LiptonReduction]: Total number of compositions: 38 [2021-03-24 22:14:52,711 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1981 [2021-03-24 22:14:52,712 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-03-24 22:14:52,712 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:52,712 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:52,712 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:14:52,712 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:52,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:52,713 INFO L82 PathProgramCache]: Analyzing trace with hash 100771, now seen corresponding path program 1 times [2021-03-24 22:14:52,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:52,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69587973] [2021-03-24 22:14:52,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:52,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:14:52,724 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:14:52,724 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:14:52,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:14:52,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69587973] [2021-03-24 22:14:52,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:14:52,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:14:52,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777415997] [2021-03-24 22:14:52,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:14:52,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:14:52,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:14:52,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:14:52,727 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 157 [2021-03-24 22:14:52,728 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 79 transitions, 1754 flow. Second operand has 3 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 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) [2021-03-24 22:14:52,728 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:14:52,728 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 157 [2021-03-24 22:14:52,728 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:14:52,743 INFO L129 PetriNetUnfolder]: 0/78 cut-off events. [2021-03-24 22:14:52,743 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:52,743 INFO L84 FinitePrefix]: Finished finitePrefix Result has 936 conditions, 78 events. 0/78 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 76 event pairs, 0 based on Foata normal form. 39/117 useless extension candidates. Maximal degree in co-relation 0. Up to 39 conditions per place. [2021-03-24 22:14:52,743 INFO L132 encePairwiseOnDemand]: 155/157 looper letters, 0 selfloop transitions, 1 changer transitions 0/78 dead transitions. [2021-03-24 22:14:52,743 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 78 transitions, 1754 flow [2021-03-24 22:14:52,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:14:52,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:14:52,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 464 transitions. [2021-03-24 22:14:52,744 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9851380042462845 [2021-03-24 22:14:52,744 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 464 transitions. [2021-03-24 22:14:52,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 464 transitions. [2021-03-24 22:14:52,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:14:52,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 464 transitions. [2021-03-24 22:14:52,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 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) [2021-03-24 22:14:52,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 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) [2021-03-24 22:14:52,746 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 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) [2021-03-24 22:14:52,746 INFO L185 Difference]: Start difference. First operand has 156 places, 79 transitions, 1754 flow. Second operand 3 states and 464 transitions. [2021-03-24 22:14:52,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 78 transitions, 1754 flow [2021-03-24 22:14:52,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 78 transitions, 348 flow, removed 703 selfloop flow, removed 0 redundant places. [2021-03-24 22:14:52,762 INFO L241 Difference]: Finished difference. Result has 157 places, 78 transitions, 348 flow [2021-03-24 22:14:52,762 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=348, PETRI_PLACES=157, PETRI_TRANSITIONS=78} [2021-03-24 22:14:52,762 INFO L343 CegarLoopForPetriNet]: 156 programPoint places, 1 predicate places. [2021-03-24 22:14:52,763 INFO L480 AbstractCegarLoop]: Abstraction has has 157 places, 78 transitions, 348 flow [2021-03-24 22:14:52,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 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) [2021-03-24 22:14:52,763 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:52,763 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:14:52,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-03-24 22:14:52,763 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:52,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:52,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1021538209, now seen corresponding path program 1 times [2021-03-24 22:14:52,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:52,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339289930] [2021-03-24 22:14:52,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:52,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:52,769 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:52,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:52,771 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:52,776 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:14:52,776 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:14:52,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-03-24 22:14:52,776 WARN L342 ceAbstractionStarter]: 38 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:14:52,776 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 39 thread instances. [2021-03-24 22:14:52,812 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:14:52,812 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:14:52,813 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:14:52,813 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:14:52,813 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:14:52,813 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:14:52,813 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:14:52,813 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:14:52,813 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:14:52,813 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:14:52,814 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 201 places, 122 transitions, 1921 flow [2021-03-24 22:14:52,841 INFO L129 PetriNetUnfolder]: 0/239 cut-off events. [2021-03-24 22:14:52,841 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:52,842 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1137 conditions, 239 events. 0/239 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 781 event pairs, 0 based on Foata normal form. 0/199 useless extension candidates. Maximal degree in co-relation 0. Up to 40 conditions per place. [2021-03-24 22:14:52,842 INFO L82 GeneralOperation]: Start removeDead. Operand has 201 places, 122 transitions, 1921 flow [2021-03-24 22:14:52,843 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 199 places, 120 transitions, 1917 flow [2021-03-24 22:14:52,843 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:14:52,843 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 199 places, 120 transitions, 1917 flow [2021-03-24 22:14:52,843 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 199 places, 120 transitions, 1917 flow [2021-03-24 22:14:52,844 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 199 places, 120 transitions, 1917 flow [2021-03-24 22:14:52,865 INFO L129 PetriNetUnfolder]: 0/159 cut-off events. [2021-03-24 22:14:52,866 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:52,866 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1057 conditions, 159 events. 0/159 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 379 event pairs, 0 based on Foata normal form. 0/159 useless extension candidates. Maximal degree in co-relation 0. Up to 40 conditions per place. [2021-03-24 22:14:52,872 INFO L142 LiptonReduction]: Number of co-enabled transitions 9204 [2021-03-24 22:14:54,920 INFO L154 LiptonReduction]: Checked pairs total: 3783 [2021-03-24 22:14:54,920 INFO L156 LiptonReduction]: Total number of compositions: 39 [2021-03-24 22:14:54,921 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 2078 [2021-03-24 22:14:54,921 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-03-24 22:14:54,921 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:54,921 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:54,921 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:14:54,921 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:54,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:54,922 INFO L82 PathProgramCache]: Analyzing trace with hash 105891, now seen corresponding path program 1 times [2021-03-24 22:14:54,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:54,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246106124] [2021-03-24 22:14:54,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:54,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:14:54,928 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:14:54,928 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:14:54,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:14:54,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246106124] [2021-03-24 22:14:54,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:14:54,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:14:54,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199094349] [2021-03-24 22:14:54,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:14:54,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:14:54,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:14:54,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:14:54,931 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 161 [2021-03-24 22:14:54,931 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 81 transitions, 1839 flow. Second operand has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 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) [2021-03-24 22:14:54,931 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:14:54,931 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 161 [2021-03-24 22:14:54,931 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:14:54,942 INFO L129 PetriNetUnfolder]: 0/80 cut-off events. [2021-03-24 22:14:54,942 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:54,943 INFO L84 FinitePrefix]: Finished finitePrefix Result has 980 conditions, 80 events. 0/80 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 77 event pairs, 0 based on Foata normal form. 40/120 useless extension candidates. Maximal degree in co-relation 0. Up to 40 conditions per place. [2021-03-24 22:14:54,943 INFO L132 encePairwiseOnDemand]: 159/161 looper letters, 0 selfloop transitions, 1 changer transitions 0/80 dead transitions. [2021-03-24 22:14:54,943 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 80 transitions, 1839 flow [2021-03-24 22:14:54,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:14:54,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:14:54,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 476 transitions. [2021-03-24 22:14:54,944 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9855072463768116 [2021-03-24 22:14:54,944 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 476 transitions. [2021-03-24 22:14:54,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 476 transitions. [2021-03-24 22:14:54,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:14:54,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 476 transitions. [2021-03-24 22:14:54,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 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) [2021-03-24 22:14:54,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 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) [2021-03-24 22:14:54,946 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 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) [2021-03-24 22:14:54,946 INFO L185 Difference]: Start difference. First operand has 160 places, 81 transitions, 1839 flow. Second operand 3 states and 476 transitions. [2021-03-24 22:14:54,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 80 transitions, 1839 flow [2021-03-24 22:14:54,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 80 transitions, 357 flow, removed 741 selfloop flow, removed 0 redundant places. [2021-03-24 22:14:54,962 INFO L241 Difference]: Finished difference. Result has 161 places, 80 transitions, 357 flow [2021-03-24 22:14:54,962 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=357, PETRI_PLACES=161, PETRI_TRANSITIONS=80} [2021-03-24 22:14:54,962 INFO L343 CegarLoopForPetriNet]: 160 programPoint places, 1 predicate places. [2021-03-24 22:14:54,962 INFO L480 AbstractCegarLoop]: Abstraction has has 161 places, 80 transitions, 357 flow [2021-03-24 22:14:54,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 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) [2021-03-24 22:14:54,963 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:54,963 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:14:54,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-03-24 22:14:54,963 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:54,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:54,963 INFO L82 PathProgramCache]: Analyzing trace with hash 131279706, now seen corresponding path program 1 times [2021-03-24 22:14:54,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:54,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040122370] [2021-03-24 22:14:54,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:54,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:54,970 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:54,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:54,972 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:54,976 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:14:54,976 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:14:54,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-03-24 22:14:54,976 WARN L342 ceAbstractionStarter]: 39 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:14:54,977 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 40 thread instances. [2021-03-24 22:14:55,014 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:14:55,014 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:14:55,015 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:14:55,015 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:14:55,015 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:14:55,015 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:14:55,015 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:14:55,015 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:14:55,015 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:14:55,015 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:14:55,016 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 206 places, 125 transitions, 2010 flow [2021-03-24 22:14:55,039 INFO L129 PetriNetUnfolder]: 0/245 cut-off events. [2021-03-24 22:14:55,040 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:55,040 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1186 conditions, 245 events. 0/245 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 816 event pairs, 0 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 0. Up to 41 conditions per place. [2021-03-24 22:14:55,040 INFO L82 GeneralOperation]: Start removeDead. Operand has 206 places, 125 transitions, 2010 flow [2021-03-24 22:14:55,041 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 204 places, 123 transitions, 2006 flow [2021-03-24 22:14:55,041 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:14:55,041 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 204 places, 123 transitions, 2006 flow [2021-03-24 22:14:55,042 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 204 places, 123 transitions, 2006 flow [2021-03-24 22:14:55,042 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 204 places, 123 transitions, 2006 flow [2021-03-24 22:14:55,064 INFO L129 PetriNetUnfolder]: 0/163 cut-off events. [2021-03-24 22:14:55,064 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:55,064 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1104 conditions, 163 events. 0/163 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 456 event pairs, 0 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 0. Up to 41 conditions per place. [2021-03-24 22:14:55,071 INFO L142 LiptonReduction]: Number of co-enabled transitions 9680 [2021-03-24 22:14:57,222 INFO L154 LiptonReduction]: Checked pairs total: 3980 [2021-03-24 22:14:57,222 INFO L156 LiptonReduction]: Total number of compositions: 40 [2021-03-24 22:14:57,222 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 2181 [2021-03-24 22:14:57,223 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:14:57,223 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:57,223 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:57,224 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:14:57,224 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:57,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:57,224 INFO L82 PathProgramCache]: Analyzing trace with hash 111139, now seen corresponding path program 1 times [2021-03-24 22:14:57,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:57,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167287858] [2021-03-24 22:14:57,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:57,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:14:57,230 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:14:57,231 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:14:57,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:14:57,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167287858] [2021-03-24 22:14:57,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:14:57,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:14:57,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603276094] [2021-03-24 22:14:57,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:14:57,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:14:57,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:14:57,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:14:57,234 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 165 [2021-03-24 22:14:57,234 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 83 transitions, 1926 flow. Second operand has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 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) [2021-03-24 22:14:57,235 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:14:57,235 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 165 [2021-03-24 22:14:57,235 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:14:57,247 INFO L129 PetriNetUnfolder]: 0/82 cut-off events. [2021-03-24 22:14:57,247 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:57,247 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1025 conditions, 82 events. 0/82 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 70 event pairs, 0 based on Foata normal form. 41/123 useless extension candidates. Maximal degree in co-relation 0. Up to 41 conditions per place. [2021-03-24 22:14:57,248 INFO L132 encePairwiseOnDemand]: 163/165 looper letters, 0 selfloop transitions, 1 changer transitions 0/82 dead transitions. [2021-03-24 22:14:57,248 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 82 transitions, 1926 flow [2021-03-24 22:14:57,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:14:57,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:14:57,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 488 transitions. [2021-03-24 22:14:57,248 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9858585858585859 [2021-03-24 22:14:57,248 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 488 transitions. [2021-03-24 22:14:57,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 488 transitions. [2021-03-24 22:14:57,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:14:57,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 488 transitions. [2021-03-24 22:14:57,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 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) [2021-03-24 22:14:57,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 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) [2021-03-24 22:14:57,250 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 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) [2021-03-24 22:14:57,250 INFO L185 Difference]: Start difference. First operand has 164 places, 83 transitions, 1926 flow. Second operand 3 states and 488 transitions. [2021-03-24 22:14:57,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 82 transitions, 1926 flow [2021-03-24 22:14:57,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 82 transitions, 366 flow, removed 780 selfloop flow, removed 0 redundant places. [2021-03-24 22:14:57,271 INFO L241 Difference]: Finished difference. Result has 165 places, 82 transitions, 366 flow [2021-03-24 22:14:57,271 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=366, PETRI_PLACES=165, PETRI_TRANSITIONS=82} [2021-03-24 22:14:57,271 INFO L343 CegarLoopForPetriNet]: 164 programPoint places, 1 predicate places. [2021-03-24 22:14:57,271 INFO L480 AbstractCegarLoop]: Abstraction has has 165 places, 82 transitions, 366 flow [2021-03-24 22:14:57,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 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) [2021-03-24 22:14:57,271 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:57,271 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:14:57,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-03-24 22:14:57,272 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:57,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:57,272 INFO L82 PathProgramCache]: Analyzing trace with hash -92914844, now seen corresponding path program 1 times [2021-03-24 22:14:57,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:57,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876776425] [2021-03-24 22:14:57,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:57,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:57,279 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:57,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:57,281 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:57,285 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:14:57,285 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:14:57,286 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-03-24 22:14:57,286 WARN L342 ceAbstractionStarter]: 40 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:14:57,286 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 41 thread instances. [2021-03-24 22:14:57,323 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:14:57,323 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:14:57,324 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:14:57,324 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:14:57,324 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:14:57,324 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:14:57,324 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:14:57,324 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:14:57,324 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:14:57,324 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:14:57,326 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 211 places, 128 transitions, 2101 flow [2021-03-24 22:14:57,355 INFO L129 PetriNetUnfolder]: 0/251 cut-off events. [2021-03-24 22:14:57,355 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:57,356 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1236 conditions, 251 events. 0/251 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 802 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 0. Up to 42 conditions per place. [2021-03-24 22:14:57,356 INFO L82 GeneralOperation]: Start removeDead. Operand has 211 places, 128 transitions, 2101 flow [2021-03-24 22:14:57,357 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 126 transitions, 2097 flow [2021-03-24 22:14:57,357 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:14:57,357 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 209 places, 126 transitions, 2097 flow [2021-03-24 22:14:57,357 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 209 places, 126 transitions, 2097 flow [2021-03-24 22:14:57,358 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 209 places, 126 transitions, 2097 flow [2021-03-24 22:14:57,382 INFO L129 PetriNetUnfolder]: 0/167 cut-off events. [2021-03-24 22:14:57,382 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:57,382 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1152 conditions, 167 events. 0/167 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 495 event pairs, 0 based on Foata normal form. 0/167 useless extension candidates. Maximal degree in co-relation 0. Up to 42 conditions per place. [2021-03-24 22:14:57,389 INFO L142 LiptonReduction]: Number of co-enabled transitions 10168 [2021-03-24 22:14:59,673 INFO L154 LiptonReduction]: Checked pairs total: 4182 [2021-03-24 22:14:59,673 INFO L156 LiptonReduction]: Total number of compositions: 41 [2021-03-24 22:14:59,673 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 2316 [2021-03-24 22:14:59,674 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-03-24 22:14:59,674 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:59,674 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:59,674 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:14:59,674 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:59,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:59,674 INFO L82 PathProgramCache]: Analyzing trace with hash 116515, now seen corresponding path program 1 times [2021-03-24 22:14:59,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:59,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037524380] [2021-03-24 22:14:59,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:59,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:14:59,681 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:14:59,681 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:14:59,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:14:59,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037524380] [2021-03-24 22:14:59,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:14:59,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:14:59,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780337064] [2021-03-24 22:14:59,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:14:59,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:14:59,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:14:59,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:14:59,685 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 169 [2021-03-24 22:14:59,685 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 85 transitions, 2015 flow. Second operand has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 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) [2021-03-24 22:14:59,685 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:14:59,685 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 169 [2021-03-24 22:14:59,685 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:14:59,701 INFO L129 PetriNetUnfolder]: 0/84 cut-off events. [2021-03-24 22:14:59,701 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:59,702 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1071 conditions, 84 events. 0/84 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 79 event pairs, 0 based on Foata normal form. 42/126 useless extension candidates. Maximal degree in co-relation 0. Up to 42 conditions per place. [2021-03-24 22:14:59,702 INFO L132 encePairwiseOnDemand]: 167/169 looper letters, 0 selfloop transitions, 1 changer transitions 0/84 dead transitions. [2021-03-24 22:14:59,702 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 84 transitions, 2015 flow [2021-03-24 22:14:59,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:14:59,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:14:59,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 500 transitions. [2021-03-24 22:14:59,703 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9861932938856016 [2021-03-24 22:14:59,703 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 500 transitions. [2021-03-24 22:14:59,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 500 transitions. [2021-03-24 22:14:59,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:14:59,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 500 transitions. [2021-03-24 22:14:59,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 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) [2021-03-24 22:14:59,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 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) [2021-03-24 22:14:59,704 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 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) [2021-03-24 22:14:59,704 INFO L185 Difference]: Start difference. First operand has 168 places, 85 transitions, 2015 flow. Second operand 3 states and 500 transitions. [2021-03-24 22:14:59,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 84 transitions, 2015 flow [2021-03-24 22:14:59,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 84 transitions, 375 flow, removed 820 selfloop flow, removed 0 redundant places. [2021-03-24 22:14:59,730 INFO L241 Difference]: Finished difference. Result has 169 places, 84 transitions, 375 flow [2021-03-24 22:14:59,731 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=373, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=375, PETRI_PLACES=169, PETRI_TRANSITIONS=84} [2021-03-24 22:14:59,731 INFO L343 CegarLoopForPetriNet]: 168 programPoint places, 1 predicate places. [2021-03-24 22:14:59,731 INFO L480 AbstractCegarLoop]: Abstraction has has 169 places, 84 transitions, 375 flow [2021-03-24 22:14:59,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 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) [2021-03-24 22:14:59,731 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:14:59,731 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:14:59,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-03-24 22:14:59,731 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:14:59,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:14:59,732 INFO L82 PathProgramCache]: Analyzing trace with hash -2062937915, now seen corresponding path program 1 times [2021-03-24 22:14:59,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:14:59,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128290601] [2021-03-24 22:14:59,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:14:59,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:59,739 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:59,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:14:59,741 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:14:59,746 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:14:59,746 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:14:59,746 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-03-24 22:14:59,746 WARN L342 ceAbstractionStarter]: 41 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:14:59,746 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 42 thread instances. [2021-03-24 22:14:59,798 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:14:59,799 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:14:59,799 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:14:59,799 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:14:59,799 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:14:59,799 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:14:59,799 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:14:59,799 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:14:59,799 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:14:59,799 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:14:59,801 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 216 places, 131 transitions, 2194 flow [2021-03-24 22:14:59,828 INFO L129 PetriNetUnfolder]: 0/257 cut-off events. [2021-03-24 22:14:59,828 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:59,828 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1287 conditions, 257 events. 0/257 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 808 event pairs, 0 based on Foata normal form. 0/214 useless extension candidates. Maximal degree in co-relation 0. Up to 43 conditions per place. [2021-03-24 22:14:59,828 INFO L82 GeneralOperation]: Start removeDead. Operand has 216 places, 131 transitions, 2194 flow [2021-03-24 22:14:59,829 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 214 places, 129 transitions, 2190 flow [2021-03-24 22:14:59,829 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:14:59,829 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 214 places, 129 transitions, 2190 flow [2021-03-24 22:14:59,830 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 214 places, 129 transitions, 2190 flow [2021-03-24 22:14:59,830 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 214 places, 129 transitions, 2190 flow [2021-03-24 22:14:59,850 INFO L129 PetriNetUnfolder]: 0/171 cut-off events. [2021-03-24 22:14:59,850 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:14:59,850 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1201 conditions, 171 events. 0/171 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 493 event pairs, 0 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 0. Up to 43 conditions per place. [2021-03-24 22:14:59,859 INFO L142 LiptonReduction]: Number of co-enabled transitions 10668 [2021-03-24 22:15:02,264 INFO L154 LiptonReduction]: Checked pairs total: 4389 [2021-03-24 22:15:02,264 INFO L156 LiptonReduction]: Total number of compositions: 42 [2021-03-24 22:15:02,264 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 2435 [2021-03-24 22:15:02,265 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-03-24 22:15:02,265 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:02,265 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:15:02,265 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:15:02,265 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:15:02,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:15:02,265 INFO L82 PathProgramCache]: Analyzing trace with hash 122019, now seen corresponding path program 1 times [2021-03-24 22:15:02,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:15:02,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410679808] [2021-03-24 22:15:02,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:15:02,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:15:02,275 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:15:02,275 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:15:02,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:15:02,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410679808] [2021-03-24 22:15:02,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:15:02,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:15:02,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806616768] [2021-03-24 22:15:02,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:15:02,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:15:02,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:15:02,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:15:02,279 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 173 [2021-03-24 22:15:02,280 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 87 transitions, 2106 flow. Second operand has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 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) [2021-03-24 22:15:02,280 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:15:02,280 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 173 [2021-03-24 22:15:02,280 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:15:02,297 INFO L129 PetriNetUnfolder]: 0/86 cut-off events. [2021-03-24 22:15:02,297 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:02,297 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1118 conditions, 86 events. 0/86 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 90 event pairs, 0 based on Foata normal form. 43/129 useless extension candidates. Maximal degree in co-relation 0. Up to 43 conditions per place. [2021-03-24 22:15:02,298 INFO L132 encePairwiseOnDemand]: 171/173 looper letters, 0 selfloop transitions, 1 changer transitions 0/86 dead transitions. [2021-03-24 22:15:02,298 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 86 transitions, 2106 flow [2021-03-24 22:15:02,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:15:02,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:15:02,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 512 transitions. [2021-03-24 22:15:02,298 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9865125240847784 [2021-03-24 22:15:02,298 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 512 transitions. [2021-03-24 22:15:02,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 512 transitions. [2021-03-24 22:15:02,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:15:02,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 512 transitions. [2021-03-24 22:15:02,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 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) [2021-03-24 22:15:02,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 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) [2021-03-24 22:15:02,300 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 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) [2021-03-24 22:15:02,300 INFO L185 Difference]: Start difference. First operand has 172 places, 87 transitions, 2106 flow. Second operand 3 states and 512 transitions. [2021-03-24 22:15:02,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 86 transitions, 2106 flow [2021-03-24 22:15:02,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 86 transitions, 384 flow, removed 861 selfloop flow, removed 0 redundant places. [2021-03-24 22:15:02,323 INFO L241 Difference]: Finished difference. Result has 173 places, 86 transitions, 384 flow [2021-03-24 22:15:02,323 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=384, PETRI_PLACES=173, PETRI_TRANSITIONS=86} [2021-03-24 22:15:02,323 INFO L343 CegarLoopForPetriNet]: 172 programPoint places, 1 predicate places. [2021-03-24 22:15:02,323 INFO L480 AbstractCegarLoop]: Abstraction has has 173 places, 86 transitions, 384 flow [2021-03-24 22:15:02,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 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) [2021-03-24 22:15:02,324 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:15:02,324 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:15:02,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-03-24 22:15:02,324 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:15:02,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:15:02,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1248466727, now seen corresponding path program 1 times [2021-03-24 22:15:02,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:15:02,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345539472] [2021-03-24 22:15:02,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:15:02,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:15:02,332 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:15:02,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:15:02,334 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:15:02,338 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:15:02,339 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:15:02,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-03-24 22:15:02,339 WARN L342 ceAbstractionStarter]: 42 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:15:02,339 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 43 thread instances. [2021-03-24 22:15:02,392 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:15:02,392 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:15:02,393 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:15:02,393 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:15:02,393 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:15:02,393 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:15:02,393 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:15:02,393 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:15:02,393 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:15:02,393 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:15:02,397 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 221 places, 134 transitions, 2289 flow [2021-03-24 22:15:02,422 INFO L129 PetriNetUnfolder]: 0/263 cut-off events. [2021-03-24 22:15:02,423 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:02,423 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1339 conditions, 263 events. 0/263 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 856 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 0. Up to 44 conditions per place. [2021-03-24 22:15:02,423 INFO L82 GeneralOperation]: Start removeDead. Operand has 221 places, 134 transitions, 2289 flow [2021-03-24 22:15:02,424 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 219 places, 132 transitions, 2285 flow [2021-03-24 22:15:02,424 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:15:02,424 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 219 places, 132 transitions, 2285 flow [2021-03-24 22:15:02,424 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 219 places, 132 transitions, 2285 flow [2021-03-24 22:15:02,425 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 219 places, 132 transitions, 2285 flow [2021-03-24 22:15:02,444 INFO L129 PetriNetUnfolder]: 0/175 cut-off events. [2021-03-24 22:15:02,444 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:02,444 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1251 conditions, 175 events. 0/175 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 491 event pairs, 0 based on Foata normal form. 0/175 useless extension candidates. Maximal degree in co-relation 0. Up to 44 conditions per place. [2021-03-24 22:15:02,450 INFO L142 LiptonReduction]: Number of co-enabled transitions 11180 [2021-03-24 22:15:04,996 INFO L154 LiptonReduction]: Checked pairs total: 4601 [2021-03-24 22:15:04,996 INFO L156 LiptonReduction]: Total number of compositions: 43 [2021-03-24 22:15:04,996 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 2572 [2021-03-24 22:15:04,997 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-03-24 22:15:04,997 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:04,997 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:15:04,997 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:15:04,997 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:15:04,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:15:04,998 INFO L82 PathProgramCache]: Analyzing trace with hash 127651, now seen corresponding path program 1 times [2021-03-24 22:15:04,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:15:04,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438250558] [2021-03-24 22:15:04,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:15:05,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:15:05,016 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:15:05,017 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:15:05,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:15:05,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438250558] [2021-03-24 22:15:05,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:15:05,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:15:05,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173079921] [2021-03-24 22:15:05,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:15:05,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:15:05,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:15:05,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:15:05,022 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 177 [2021-03-24 22:15:05,023 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 89 transitions, 2199 flow. Second operand has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 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) [2021-03-24 22:15:05,023 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:15:05,023 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 177 [2021-03-24 22:15:05,023 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:15:05,042 INFO L129 PetriNetUnfolder]: 0/88 cut-off events. [2021-03-24 22:15:05,042 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:05,042 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1166 conditions, 88 events. 0/88 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 83 event pairs, 0 based on Foata normal form. 44/132 useless extension candidates. Maximal degree in co-relation 0. Up to 44 conditions per place. [2021-03-24 22:15:05,042 INFO L132 encePairwiseOnDemand]: 175/177 looper letters, 0 selfloop transitions, 1 changer transitions 0/88 dead transitions. [2021-03-24 22:15:05,043 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 88 transitions, 2199 flow [2021-03-24 22:15:05,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:15:05,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:15:05,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 524 transitions. [2021-03-24 22:15:05,044 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9868173258003766 [2021-03-24 22:15:05,044 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 524 transitions. [2021-03-24 22:15:05,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 524 transitions. [2021-03-24 22:15:05,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:15:05,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 524 transitions. [2021-03-24 22:15:05,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 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) [2021-03-24 22:15:05,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 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) [2021-03-24 22:15:05,047 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 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) [2021-03-24 22:15:05,047 INFO L185 Difference]: Start difference. First operand has 176 places, 89 transitions, 2199 flow. Second operand 3 states and 524 transitions. [2021-03-24 22:15:05,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 88 transitions, 2199 flow [2021-03-24 22:15:05,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 88 transitions, 393 flow, removed 903 selfloop flow, removed 0 redundant places. [2021-03-24 22:15:05,077 INFO L241 Difference]: Finished difference. Result has 177 places, 88 transitions, 393 flow [2021-03-24 22:15:05,078 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=177, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=393, PETRI_PLACES=177, PETRI_TRANSITIONS=88} [2021-03-24 22:15:05,078 INFO L343 CegarLoopForPetriNet]: 176 programPoint places, 1 predicate places. [2021-03-24 22:15:05,078 INFO L480 AbstractCegarLoop]: Abstraction has has 177 places, 88 transitions, 393 flow [2021-03-24 22:15:05,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 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) [2021-03-24 22:15:05,078 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:15:05,078 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:15:05,078 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-03-24 22:15:05,078 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:15:05,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:15:05,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1295684672, now seen corresponding path program 1 times [2021-03-24 22:15:05,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:15:05,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619520021] [2021-03-24 22:15:05,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:15:05,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:15:05,086 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:15:05,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:15:05,088 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:15:05,092 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:15:05,092 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:15:05,093 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-03-24 22:15:05,093 WARN L342 ceAbstractionStarter]: 43 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:15:05,093 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 44 thread instances. [2021-03-24 22:15:05,132 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:15:05,133 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:15:05,133 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:15:05,133 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:15:05,133 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:15:05,133 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:15:05,133 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:15:05,133 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:15:05,133 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:15:05,133 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:15:05,134 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 226 places, 137 transitions, 2386 flow [2021-03-24 22:15:05,163 INFO L129 PetriNetUnfolder]: 0/269 cut-off events. [2021-03-24 22:15:05,163 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:05,163 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1392 conditions, 269 events. 0/269 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 881 event pairs, 0 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 0. Up to 45 conditions per place. [2021-03-24 22:15:05,163 INFO L82 GeneralOperation]: Start removeDead. Operand has 226 places, 137 transitions, 2386 flow [2021-03-24 22:15:05,164 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 224 places, 135 transitions, 2382 flow [2021-03-24 22:15:05,164 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:15:05,165 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 224 places, 135 transitions, 2382 flow [2021-03-24 22:15:05,165 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 224 places, 135 transitions, 2382 flow [2021-03-24 22:15:05,166 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 224 places, 135 transitions, 2382 flow [2021-03-24 22:15:05,193 INFO L129 PetriNetUnfolder]: 0/179 cut-off events. [2021-03-24 22:15:05,193 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:05,193 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1302 conditions, 179 events. 0/179 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 557 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 0. Up to 45 conditions per place. [2021-03-24 22:15:05,202 INFO L142 LiptonReduction]: Number of co-enabled transitions 11704 [2021-03-24 22:15:07,914 INFO L154 LiptonReduction]: Checked pairs total: 4818 [2021-03-24 22:15:07,914 INFO L156 LiptonReduction]: Total number of compositions: 44 [2021-03-24 22:15:07,915 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 2750 [2021-03-24 22:15:07,915 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-03-24 22:15:07,915 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:07,915 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:15:07,916 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:15:07,916 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:15:07,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:15:07,916 INFO L82 PathProgramCache]: Analyzing trace with hash 133411, now seen corresponding path program 1 times [2021-03-24 22:15:07,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:15:07,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900217899] [2021-03-24 22:15:07,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:15:07,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:15:07,924 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:15:07,924 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:15:07,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:15:07,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900217899] [2021-03-24 22:15:07,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:15:07,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:15:07,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246765850] [2021-03-24 22:15:07,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:15:07,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:15:07,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:15:07,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:15:07,928 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 181 [2021-03-24 22:15:07,928 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 91 transitions, 2294 flow. Second operand has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 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) [2021-03-24 22:15:07,928 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:15:07,928 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 181 [2021-03-24 22:15:07,928 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:15:07,943 INFO L129 PetriNetUnfolder]: 0/90 cut-off events. [2021-03-24 22:15:07,943 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:07,943 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1215 conditions, 90 events. 0/90 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 80 event pairs, 0 based on Foata normal form. 45/135 useless extension candidates. Maximal degree in co-relation 0. Up to 45 conditions per place. [2021-03-24 22:15:07,944 INFO L132 encePairwiseOnDemand]: 179/181 looper letters, 0 selfloop transitions, 1 changer transitions 0/90 dead transitions. [2021-03-24 22:15:07,944 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 90 transitions, 2294 flow [2021-03-24 22:15:07,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:15:07,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:15:07,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 536 transitions. [2021-03-24 22:15:07,945 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9871086556169429 [2021-03-24 22:15:07,945 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 536 transitions. [2021-03-24 22:15:07,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 536 transitions. [2021-03-24 22:15:07,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:15:07,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 536 transitions. [2021-03-24 22:15:07,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 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) [2021-03-24 22:15:07,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 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) [2021-03-24 22:15:07,947 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 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) [2021-03-24 22:15:07,947 INFO L185 Difference]: Start difference. First operand has 180 places, 91 transitions, 2294 flow. Second operand 3 states and 536 transitions. [2021-03-24 22:15:07,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 90 transitions, 2294 flow [2021-03-24 22:15:07,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 90 transitions, 402 flow, removed 946 selfloop flow, removed 0 redundant places. [2021-03-24 22:15:07,981 INFO L241 Difference]: Finished difference. Result has 181 places, 90 transitions, 402 flow [2021-03-24 22:15:07,982 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=402, PETRI_PLACES=181, PETRI_TRANSITIONS=90} [2021-03-24 22:15:07,982 INFO L343 CegarLoopForPetriNet]: 180 programPoint places, 1 predicate places. [2021-03-24 22:15:07,982 INFO L480 AbstractCegarLoop]: Abstraction has has 181 places, 90 transitions, 402 flow [2021-03-24 22:15:07,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 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) [2021-03-24 22:15:07,982 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:15:07,982 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:15:07,982 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-03-24 22:15:07,982 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:15:07,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:15:07,983 INFO L82 PathProgramCache]: Analyzing trace with hash -199292694, now seen corresponding path program 1 times [2021-03-24 22:15:07,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:15:07,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515751574] [2021-03-24 22:15:07,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:15:07,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:15:07,991 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:15:07,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:15:07,993 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:15:07,998 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:15:07,998 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:15:07,998 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-03-24 22:15:07,998 WARN L342 ceAbstractionStarter]: 44 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:15:07,998 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 45 thread instances. [2021-03-24 22:15:08,040 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:15:08,041 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:15:08,041 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:15:08,041 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:15:08,041 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:15:08,041 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:15:08,041 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:15:08,041 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:15:08,042 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:15:08,042 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:15:08,043 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 231 places, 140 transitions, 2485 flow [2021-03-24 22:15:08,078 INFO L129 PetriNetUnfolder]: 0/275 cut-off events. [2021-03-24 22:15:08,079 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:08,079 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1446 conditions, 275 events. 0/275 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 874 event pairs, 0 based on Foata normal form. 0/229 useless extension candidates. Maximal degree in co-relation 0. Up to 46 conditions per place. [2021-03-24 22:15:08,079 INFO L82 GeneralOperation]: Start removeDead. Operand has 231 places, 140 transitions, 2485 flow [2021-03-24 22:15:08,080 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 229 places, 138 transitions, 2481 flow [2021-03-24 22:15:08,081 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:15:08,081 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 229 places, 138 transitions, 2481 flow [2021-03-24 22:15:08,081 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 229 places, 138 transitions, 2481 flow [2021-03-24 22:15:08,082 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 229 places, 138 transitions, 2481 flow [2021-03-24 22:15:08,110 INFO L129 PetriNetUnfolder]: 0/183 cut-off events. [2021-03-24 22:15:08,110 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:08,110 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1354 conditions, 183 events. 0/183 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 439 event pairs, 0 based on Foata normal form. 0/183 useless extension candidates. Maximal degree in co-relation 0. Up to 46 conditions per place. [2021-03-24 22:15:08,119 INFO L142 LiptonReduction]: Number of co-enabled transitions 12240 [2021-03-24 22:15:11,029 INFO L154 LiptonReduction]: Checked pairs total: 5040 [2021-03-24 22:15:11,029 INFO L156 LiptonReduction]: Total number of compositions: 45 [2021-03-24 22:15:11,029 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 2948 [2021-03-24 22:15:11,030 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-03-24 22:15:11,030 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:11,030 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:15:11,030 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:15:11,031 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:15:11,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:15:11,031 INFO L82 PathProgramCache]: Analyzing trace with hash 139299, now seen corresponding path program 1 times [2021-03-24 22:15:11,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:15:11,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503810666] [2021-03-24 22:15:11,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:15:11,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:15:11,038 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:15:11,038 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:15:11,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:15:11,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503810666] [2021-03-24 22:15:11,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:15:11,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:15:11,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419195110] [2021-03-24 22:15:11,040 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:15:11,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:15:11,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:15:11,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:15:11,041 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 185 [2021-03-24 22:15:11,042 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 93 transitions, 2391 flow. Second operand has 3 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 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) [2021-03-24 22:15:11,042 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:15:11,042 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 185 [2021-03-24 22:15:11,042 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:15:11,059 INFO L129 PetriNetUnfolder]: 0/92 cut-off events. [2021-03-24 22:15:11,059 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:11,059 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1265 conditions, 92 events. 0/92 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 79 event pairs, 0 based on Foata normal form. 46/138 useless extension candidates. Maximal degree in co-relation 0. Up to 46 conditions per place. [2021-03-24 22:15:11,060 INFO L132 encePairwiseOnDemand]: 183/185 looper letters, 0 selfloop transitions, 1 changer transitions 0/92 dead transitions. [2021-03-24 22:15:11,060 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 92 transitions, 2391 flow [2021-03-24 22:15:11,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:15:11,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:15:11,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 548 transitions. [2021-03-24 22:15:11,061 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9873873873873874 [2021-03-24 22:15:11,061 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 548 transitions. [2021-03-24 22:15:11,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 548 transitions. [2021-03-24 22:15:11,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:15:11,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 548 transitions. [2021-03-24 22:15:11,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 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) [2021-03-24 22:15:11,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 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) [2021-03-24 22:15:11,063 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 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) [2021-03-24 22:15:11,063 INFO L185 Difference]: Start difference. First operand has 184 places, 93 transitions, 2391 flow. Second operand 3 states and 548 transitions. [2021-03-24 22:15:11,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 92 transitions, 2391 flow [2021-03-24 22:15:11,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 92 transitions, 411 flow, removed 990 selfloop flow, removed 0 redundant places. [2021-03-24 22:15:11,094 INFO L241 Difference]: Finished difference. Result has 185 places, 92 transitions, 411 flow [2021-03-24 22:15:11,094 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=411, PETRI_PLACES=185, PETRI_TRANSITIONS=92} [2021-03-24 22:15:11,094 INFO L343 CegarLoopForPetriNet]: 184 programPoint places, 1 predicate places. [2021-03-24 22:15:11,094 INFO L480 AbstractCegarLoop]: Abstraction has has 185 places, 92 transitions, 411 flow [2021-03-24 22:15:11,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 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) [2021-03-24 22:15:11,094 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:15:11,094 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:15:11,094 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-03-24 22:15:11,095 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:15:11,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:15:11,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1531564085, now seen corresponding path program 1 times [2021-03-24 22:15:11,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:15:11,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24211104] [2021-03-24 22:15:11,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:15:11,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:15:11,102 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:15:11,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:15:11,104 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:15:11,110 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:15:11,110 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:15:11,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-03-24 22:15:11,111 WARN L342 ceAbstractionStarter]: 45 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:15:11,111 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 46 thread instances. [2021-03-24 22:15:11,153 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:15:11,154 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:15:11,154 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:15:11,154 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:15:11,154 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:15:11,154 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:15:11,154 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:15:11,154 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:15:11,154 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:15:11,154 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:15:11,156 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 236 places, 143 transitions, 2586 flow [2021-03-24 22:15:11,199 INFO L129 PetriNetUnfolder]: 0/281 cut-off events. [2021-03-24 22:15:11,199 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:11,199 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1501 conditions, 281 events. 0/281 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 939 event pairs, 0 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 0. Up to 47 conditions per place. [2021-03-24 22:15:11,199 INFO L82 GeneralOperation]: Start removeDead. Operand has 236 places, 143 transitions, 2586 flow [2021-03-24 22:15:11,201 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 234 places, 141 transitions, 2582 flow [2021-03-24 22:15:11,201 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:15:11,201 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 234 places, 141 transitions, 2582 flow [2021-03-24 22:15:11,201 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 234 places, 141 transitions, 2582 flow [2021-03-24 22:15:11,202 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 234 places, 141 transitions, 2582 flow [2021-03-24 22:15:11,235 INFO L129 PetriNetUnfolder]: 0/187 cut-off events. [2021-03-24 22:15:11,235 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:11,236 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1407 conditions, 187 events. 0/187 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 485 event pairs, 0 based on Foata normal form. 0/187 useless extension candidates. Maximal degree in co-relation 0. Up to 47 conditions per place. [2021-03-24 22:15:11,244 INFO L142 LiptonReduction]: Number of co-enabled transitions 12788 [2021-03-24 22:15:14,207 INFO L154 LiptonReduction]: Checked pairs total: 5267 [2021-03-24 22:15:14,207 INFO L156 LiptonReduction]: Total number of compositions: 46 [2021-03-24 22:15:14,208 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 3007 [2021-03-24 22:15:14,208 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:15:14,208 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:14,208 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:15:14,208 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:15:14,208 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:15:14,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:15:14,209 INFO L82 PathProgramCache]: Analyzing trace with hash 145315, now seen corresponding path program 1 times [2021-03-24 22:15:14,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:15:14,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343350545] [2021-03-24 22:15:14,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:15:14,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:15:14,223 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:15:14,224 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:15:14,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:15:14,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343350545] [2021-03-24 22:15:14,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:15:14,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:15:14,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304637391] [2021-03-24 22:15:14,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:15:14,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:15:14,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:15:14,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:15:14,229 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 189 [2021-03-24 22:15:14,230 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 95 transitions, 2490 flow. Second operand has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 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) [2021-03-24 22:15:14,230 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:15:14,230 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 189 [2021-03-24 22:15:14,230 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:15:14,252 INFO L129 PetriNetUnfolder]: 0/94 cut-off events. [2021-03-24 22:15:14,252 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:14,252 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1316 conditions, 94 events. 0/94 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 90 event pairs, 0 based on Foata normal form. 47/141 useless extension candidates. Maximal degree in co-relation 0. Up to 47 conditions per place. [2021-03-24 22:15:14,254 INFO L132 encePairwiseOnDemand]: 187/189 looper letters, 0 selfloop transitions, 1 changer transitions 0/94 dead transitions. [2021-03-24 22:15:14,254 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 94 transitions, 2490 flow [2021-03-24 22:15:14,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:15:14,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:15:14,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 560 transitions. [2021-03-24 22:15:14,255 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9876543209876543 [2021-03-24 22:15:14,255 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 560 transitions. [2021-03-24 22:15:14,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 560 transitions. [2021-03-24 22:15:14,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:15:14,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 560 transitions. [2021-03-24 22:15:14,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 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) [2021-03-24 22:15:14,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 189.0) internal successors, (756), 4 states have internal predecessors, (756), 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) [2021-03-24 22:15:14,257 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 189.0) internal successors, (756), 4 states have internal predecessors, (756), 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) [2021-03-24 22:15:14,257 INFO L185 Difference]: Start difference. First operand has 188 places, 95 transitions, 2490 flow. Second operand 3 states and 560 transitions. [2021-03-24 22:15:14,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 94 transitions, 2490 flow [2021-03-24 22:15:14,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 94 transitions, 420 flow, removed 1035 selfloop flow, removed 0 redundant places. [2021-03-24 22:15:14,290 INFO L241 Difference]: Finished difference. Result has 189 places, 94 transitions, 420 flow [2021-03-24 22:15:14,290 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=420, PETRI_PLACES=189, PETRI_TRANSITIONS=94} [2021-03-24 22:15:14,290 INFO L343 CegarLoopForPetriNet]: 188 programPoint places, 1 predicate places. [2021-03-24 22:15:14,290 INFO L480 AbstractCegarLoop]: Abstraction has has 189 places, 94 transitions, 420 flow [2021-03-24 22:15:14,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 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) [2021-03-24 22:15:14,290 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:15:14,290 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:15:14,290 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-03-24 22:15:14,290 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:15:14,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:15:14,291 INFO L82 PathProgramCache]: Analyzing trace with hash -790489427, now seen corresponding path program 1 times [2021-03-24 22:15:14,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:15:14,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091354708] [2021-03-24 22:15:14,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:15:14,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:15:14,298 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:15:14,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:15:14,300 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:15:14,305 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:15:14,306 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:15:14,306 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2021-03-24 22:15:14,306 WARN L342 ceAbstractionStarter]: 46 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:15:14,306 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 47 thread instances. [2021-03-24 22:15:14,352 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:15:14,352 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:15:14,353 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:15:14,353 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:15:14,353 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:15:14,353 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:15:14,353 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:15:14,353 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:15:14,353 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:15:14,353 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:15:14,355 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 241 places, 146 transitions, 2689 flow [2021-03-24 22:15:14,394 INFO L129 PetriNetUnfolder]: 0/287 cut-off events. [2021-03-24 22:15:14,394 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:14,394 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1557 conditions, 287 events. 0/287 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 908 event pairs, 0 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 0. Up to 48 conditions per place. [2021-03-24 22:15:14,394 INFO L82 GeneralOperation]: Start removeDead. Operand has 241 places, 146 transitions, 2689 flow [2021-03-24 22:15:14,396 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 239 places, 144 transitions, 2685 flow [2021-03-24 22:15:14,396 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:15:14,396 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 239 places, 144 transitions, 2685 flow [2021-03-24 22:15:14,396 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 239 places, 144 transitions, 2685 flow [2021-03-24 22:15:14,397 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 239 places, 144 transitions, 2685 flow [2021-03-24 22:15:14,429 INFO L129 PetriNetUnfolder]: 0/191 cut-off events. [2021-03-24 22:15:14,429 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:14,429 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1461 conditions, 191 events. 0/191 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 495 event pairs, 0 based on Foata normal form. 0/191 useless extension candidates. Maximal degree in co-relation 0. Up to 48 conditions per place. [2021-03-24 22:15:14,439 INFO L142 LiptonReduction]: Number of co-enabled transitions 13348 [2021-03-24 22:15:17,530 INFO L154 LiptonReduction]: Checked pairs total: 5499 [2021-03-24 22:15:17,530 INFO L156 LiptonReduction]: Total number of compositions: 47 [2021-03-24 22:15:17,530 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 3134 [2021-03-24 22:15:17,531 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-03-24 22:15:17,531 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:17,531 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:15:17,531 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:15:17,531 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:15:17,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:15:17,531 INFO L82 PathProgramCache]: Analyzing trace with hash 151459, now seen corresponding path program 1 times [2021-03-24 22:15:17,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:15:17,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918808918] [2021-03-24 22:15:17,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:15:17,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:15:17,539 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:15:17,541 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:15:17,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:15:17,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918808918] [2021-03-24 22:15:17,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:15:17,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:15:17,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264368656] [2021-03-24 22:15:17,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:15:17,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:15:17,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:15:17,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:15:17,544 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 193 [2021-03-24 22:15:17,544 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 97 transitions, 2591 flow. Second operand has 3 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 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) [2021-03-24 22:15:17,544 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:15:17,544 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 193 [2021-03-24 22:15:17,544 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:15:17,560 INFO L129 PetriNetUnfolder]: 0/96 cut-off events. [2021-03-24 22:15:17,560 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:17,561 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1368 conditions, 96 events. 0/96 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 85 event pairs, 0 based on Foata normal form. 48/144 useless extension candidates. Maximal degree in co-relation 0. Up to 48 conditions per place. [2021-03-24 22:15:17,561 INFO L132 encePairwiseOnDemand]: 191/193 looper letters, 0 selfloop transitions, 1 changer transitions 0/96 dead transitions. [2021-03-24 22:15:17,561 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 96 transitions, 2591 flow [2021-03-24 22:15:17,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:15:17,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:15:17,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 572 transitions. [2021-03-24 22:15:17,562 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9879101899827288 [2021-03-24 22:15:17,562 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 572 transitions. [2021-03-24 22:15:17,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 572 transitions. [2021-03-24 22:15:17,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:15:17,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 572 transitions. [2021-03-24 22:15:17,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 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) [2021-03-24 22:15:17,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 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) [2021-03-24 22:15:17,564 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 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) [2021-03-24 22:15:17,564 INFO L185 Difference]: Start difference. First operand has 192 places, 97 transitions, 2591 flow. Second operand 3 states and 572 transitions. [2021-03-24 22:15:17,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 96 transitions, 2591 flow [2021-03-24 22:15:17,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 96 transitions, 429 flow, removed 1081 selfloop flow, removed 0 redundant places. [2021-03-24 22:15:17,601 INFO L241 Difference]: Finished difference. Result has 193 places, 96 transitions, 429 flow [2021-03-24 22:15:17,601 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=429, PETRI_PLACES=193, PETRI_TRANSITIONS=96} [2021-03-24 22:15:17,602 INFO L343 CegarLoopForPetriNet]: 192 programPoint places, 1 predicate places. [2021-03-24 22:15:17,602 INFO L480 AbstractCegarLoop]: Abstraction has has 193 places, 96 transitions, 429 flow [2021-03-24 22:15:17,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 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) [2021-03-24 22:15:17,602 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:15:17,602 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:15:17,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2021-03-24 22:15:17,602 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:15:17,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:15:17,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1706992282, now seen corresponding path program 1 times [2021-03-24 22:15:17,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:15:17,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790510705] [2021-03-24 22:15:17,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:15:17,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:15:17,609 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:15:17,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:15:17,611 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:15:17,616 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:15:17,616 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:15:17,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2021-03-24 22:15:17,616 WARN L342 ceAbstractionStarter]: 47 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:15:17,616 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 48 thread instances. [2021-03-24 22:15:17,658 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:15:17,658 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:15:17,659 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:15:17,659 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:15:17,659 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:15:17,659 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:15:17,659 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:15:17,659 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:15:17,659 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:15:17,659 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:15:17,661 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 246 places, 149 transitions, 2794 flow [2021-03-24 22:15:17,702 INFO L129 PetriNetUnfolder]: 0/293 cut-off events. [2021-03-24 22:15:17,702 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:17,703 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1614 conditions, 293 events. 0/293 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 964 event pairs, 0 based on Foata normal form. 0/244 useless extension candidates. Maximal degree in co-relation 0. Up to 49 conditions per place. [2021-03-24 22:15:17,703 INFO L82 GeneralOperation]: Start removeDead. Operand has 246 places, 149 transitions, 2794 flow [2021-03-24 22:15:17,704 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 244 places, 147 transitions, 2790 flow [2021-03-24 22:15:17,704 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:15:17,705 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 244 places, 147 transitions, 2790 flow [2021-03-24 22:15:17,705 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 244 places, 147 transitions, 2790 flow [2021-03-24 22:15:17,706 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 244 places, 147 transitions, 2790 flow [2021-03-24 22:15:17,739 INFO L129 PetriNetUnfolder]: 0/195 cut-off events. [2021-03-24 22:15:17,739 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:17,739 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1516 conditions, 195 events. 0/195 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 458 event pairs, 0 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 0. Up to 49 conditions per place. [2021-03-24 22:15:17,747 INFO L142 LiptonReduction]: Number of co-enabled transitions 13920 [2021-03-24 22:15:20,940 INFO L154 LiptonReduction]: Checked pairs total: 5736 [2021-03-24 22:15:20,940 INFO L156 LiptonReduction]: Total number of compositions: 48 [2021-03-24 22:15:20,940 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 3236 [2021-03-24 22:15:20,941 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-03-24 22:15:20,941 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:20,941 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:15:20,941 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:15:20,941 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:15:20,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:15:20,941 INFO L82 PathProgramCache]: Analyzing trace with hash 157731, now seen corresponding path program 1 times [2021-03-24 22:15:20,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:15:20,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100598820] [2021-03-24 22:15:20,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:15:20,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:15:20,950 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:15:20,950 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:15:20,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:15:20,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100598820] [2021-03-24 22:15:20,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:15:20,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:15:20,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693941130] [2021-03-24 22:15:20,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:15:20,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:15:20,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:15:20,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:15:20,954 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 197 [2021-03-24 22:15:20,954 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 99 transitions, 2694 flow. Second operand has 3 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 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) [2021-03-24 22:15:20,954 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:15:20,954 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 197 [2021-03-24 22:15:20,954 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:15:20,973 INFO L129 PetriNetUnfolder]: 0/98 cut-off events. [2021-03-24 22:15:20,973 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:20,973 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1421 conditions, 98 events. 0/98 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 84 event pairs, 0 based on Foata normal form. 49/147 useless extension candidates. Maximal degree in co-relation 0. Up to 49 conditions per place. [2021-03-24 22:15:20,973 INFO L132 encePairwiseOnDemand]: 195/197 looper letters, 0 selfloop transitions, 1 changer transitions 0/98 dead transitions. [2021-03-24 22:15:20,973 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 98 transitions, 2694 flow [2021-03-24 22:15:20,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:15:20,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:15:20,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 584 transitions. [2021-03-24 22:15:20,974 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.988155668358714 [2021-03-24 22:15:20,974 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 584 transitions. [2021-03-24 22:15:20,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 584 transitions. [2021-03-24 22:15:20,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:15:20,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 584 transitions. [2021-03-24 22:15:20,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 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) [2021-03-24 22:15:20,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 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) [2021-03-24 22:15:20,976 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 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) [2021-03-24 22:15:20,976 INFO L185 Difference]: Start difference. First operand has 196 places, 99 transitions, 2694 flow. Second operand 3 states and 584 transitions. [2021-03-24 22:15:20,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 98 transitions, 2694 flow [2021-03-24 22:15:21,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 98 transitions, 438 flow, removed 1128 selfloop flow, removed 0 redundant places. [2021-03-24 22:15:21,011 INFO L241 Difference]: Finished difference. Result has 197 places, 98 transitions, 438 flow [2021-03-24 22:15:21,011 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=438, PETRI_PLACES=197, PETRI_TRANSITIONS=98} [2021-03-24 22:15:21,011 INFO L343 CegarLoopForPetriNet]: 196 programPoint places, 1 predicate places. [2021-03-24 22:15:21,011 INFO L480 AbstractCegarLoop]: Abstraction has has 197 places, 98 transitions, 438 flow [2021-03-24 22:15:21,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 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) [2021-03-24 22:15:21,012 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:15:21,012 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:15:21,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2021-03-24 22:15:21,012 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:15:21,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:15:21,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1429030512, now seen corresponding path program 1 times [2021-03-24 22:15:21,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:15:21,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294634330] [2021-03-24 22:15:21,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:15:21,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:15:21,021 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:15:21,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:15:21,023 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:15:21,029 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:15:21,029 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:15:21,029 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2021-03-24 22:15:21,029 WARN L342 ceAbstractionStarter]: 48 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:15:21,030 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 49 thread instances. [2021-03-24 22:15:21,075 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:15:21,075 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:15:21,080 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:15:21,080 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:15:21,080 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:15:21,080 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:15:21,080 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:15:21,080 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:15:21,080 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:15:21,080 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:15:21,082 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 251 places, 152 transitions, 2901 flow [2021-03-24 22:15:21,114 INFO L129 PetriNetUnfolder]: 0/299 cut-off events. [2021-03-24 22:15:21,114 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:21,114 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1672 conditions, 299 events. 0/299 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 994 event pairs, 0 based on Foata normal form. 0/249 useless extension candidates. Maximal degree in co-relation 0. Up to 50 conditions per place. [2021-03-24 22:15:21,115 INFO L82 GeneralOperation]: Start removeDead. Operand has 251 places, 152 transitions, 2901 flow [2021-03-24 22:15:21,116 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 249 places, 150 transitions, 2897 flow [2021-03-24 22:15:21,116 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:15:21,116 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 249 places, 150 transitions, 2897 flow [2021-03-24 22:15:21,117 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 249 places, 150 transitions, 2897 flow [2021-03-24 22:15:21,118 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 249 places, 150 transitions, 2897 flow [2021-03-24 22:15:21,141 INFO L129 PetriNetUnfolder]: 0/199 cut-off events. [2021-03-24 22:15:21,141 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:21,141 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1572 conditions, 199 events. 0/199 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 548 event pairs, 0 based on Foata normal form. 0/199 useless extension candidates. Maximal degree in co-relation 0. Up to 50 conditions per place. [2021-03-24 22:15:21,148 INFO L142 LiptonReduction]: Number of co-enabled transitions 14504 [2021-03-24 22:15:24,533 INFO L154 LiptonReduction]: Checked pairs total: 5978 [2021-03-24 22:15:24,533 INFO L156 LiptonReduction]: Total number of compositions: 49 [2021-03-24 22:15:24,533 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 3417 [2021-03-24 22:15:24,534 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:15:24,534 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:24,534 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:15:24,534 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:15:24,534 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:15:24,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:15:24,534 INFO L82 PathProgramCache]: Analyzing trace with hash 164131, now seen corresponding path program 1 times [2021-03-24 22:15:24,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:15:24,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157154778] [2021-03-24 22:15:24,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:15:24,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:15:24,545 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:15:24,545 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:15:24,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:15:24,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157154778] [2021-03-24 22:15:24,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:15:24,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:15:24,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652506794] [2021-03-24 22:15:24,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:15:24,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:15:24,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:15:24,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:15:24,549 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 201 [2021-03-24 22:15:24,549 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 101 transitions, 2799 flow. Second operand has 3 states, 3 states have (on average 198.66666666666666) internal successors, (596), 3 states have internal predecessors, (596), 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) [2021-03-24 22:15:24,549 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:15:24,550 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 201 [2021-03-24 22:15:24,550 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:15:24,575 INFO L129 PetriNetUnfolder]: 0/100 cut-off events. [2021-03-24 22:15:24,575 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:24,575 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1475 conditions, 100 events. 0/100 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 101 event pairs, 0 based on Foata normal form. 50/150 useless extension candidates. Maximal degree in co-relation 0. Up to 50 conditions per place. [2021-03-24 22:15:24,576 INFO L132 encePairwiseOnDemand]: 199/201 looper letters, 0 selfloop transitions, 1 changer transitions 0/100 dead transitions. [2021-03-24 22:15:24,576 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 100 transitions, 2799 flow [2021-03-24 22:15:24,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:15:24,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:15:24,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 596 transitions. [2021-03-24 22:15:24,577 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.988391376451078 [2021-03-24 22:15:24,577 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 596 transitions. [2021-03-24 22:15:24,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 596 transitions. [2021-03-24 22:15:24,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:15:24,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 596 transitions. [2021-03-24 22:15:24,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.66666666666666) internal successors, (596), 3 states have internal predecessors, (596), 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) [2021-03-24 22:15:24,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 201.0) internal successors, (804), 4 states have internal predecessors, (804), 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) [2021-03-24 22:15:24,578 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 201.0) internal successors, (804), 4 states have internal predecessors, (804), 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) [2021-03-24 22:15:24,578 INFO L185 Difference]: Start difference. First operand has 200 places, 101 transitions, 2799 flow. Second operand 3 states and 596 transitions. [2021-03-24 22:15:24,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 100 transitions, 2799 flow [2021-03-24 22:15:24,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 100 transitions, 447 flow, removed 1176 selfloop flow, removed 0 redundant places. [2021-03-24 22:15:24,609 INFO L241 Difference]: Finished difference. Result has 201 places, 100 transitions, 447 flow [2021-03-24 22:15:24,609 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=445, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=447, PETRI_PLACES=201, PETRI_TRANSITIONS=100} [2021-03-24 22:15:24,609 INFO L343 CegarLoopForPetriNet]: 200 programPoint places, 1 predicate places. [2021-03-24 22:15:24,609 INFO L480 AbstractCegarLoop]: Abstraction has has 201 places, 100 transitions, 447 flow [2021-03-24 22:15:24,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 198.66666666666666) internal successors, (596), 3 states have internal predecessors, (596), 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) [2021-03-24 22:15:24,609 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:15:24,609 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:15:24,609 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2021-03-24 22:15:24,609 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:15:24,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:15:24,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1177315567, now seen corresponding path program 1 times [2021-03-24 22:15:24,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:15:24,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571786338] [2021-03-24 22:15:24,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:15:24,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:15:24,620 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:15:24,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:15:24,622 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:15:24,627 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:15:24,628 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:15:24,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-03-24 22:15:24,628 WARN L342 ceAbstractionStarter]: 49 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:15:24,628 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 50 thread instances. [2021-03-24 22:15:24,679 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:15:24,679 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:15:24,680 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:15:24,680 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:15:24,680 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:15:24,680 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:15:24,680 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:15:24,680 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:15:24,680 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:15:24,680 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:15:24,682 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 256 places, 155 transitions, 3010 flow [2021-03-24 22:15:24,733 INFO L129 PetriNetUnfolder]: 0/305 cut-off events. [2021-03-24 22:15:24,733 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:24,733 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1731 conditions, 305 events. 0/305 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1016 event pairs, 0 based on Foata normal form. 0/254 useless extension candidates. Maximal degree in co-relation 0. Up to 51 conditions per place. [2021-03-24 22:15:24,733 INFO L82 GeneralOperation]: Start removeDead. Operand has 256 places, 155 transitions, 3010 flow [2021-03-24 22:15:24,735 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 254 places, 153 transitions, 3006 flow [2021-03-24 22:15:24,736 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:15:24,736 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 254 places, 153 transitions, 3006 flow [2021-03-24 22:15:24,736 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 254 places, 153 transitions, 3006 flow [2021-03-24 22:15:24,737 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 254 places, 153 transitions, 3006 flow [2021-03-24 22:15:24,777 INFO L129 PetriNetUnfolder]: 0/203 cut-off events. [2021-03-24 22:15:24,777 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:24,777 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1629 conditions, 203 events. 0/203 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 646 event pairs, 0 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 0. Up to 51 conditions per place. [2021-03-24 22:15:24,792 INFO L142 LiptonReduction]: Number of co-enabled transitions 15100 [2021-03-24 22:15:28,364 INFO L154 LiptonReduction]: Checked pairs total: 6225 [2021-03-24 22:15:28,364 INFO L156 LiptonReduction]: Total number of compositions: 50 [2021-03-24 22:15:28,364 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 3629 [2021-03-24 22:15:28,365 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:15:28,365 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:28,365 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:15:28,365 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:15:28,365 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:15:28,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:15:28,365 INFO L82 PathProgramCache]: Analyzing trace with hash 170659, now seen corresponding path program 1 times [2021-03-24 22:15:28,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:15:28,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644311701] [2021-03-24 22:15:28,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:15:28,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:15:28,374 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:15:28,374 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:15:28,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:15:28,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644311701] [2021-03-24 22:15:28,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:15:28,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:15:28,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995975667] [2021-03-24 22:15:28,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:15:28,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:15:28,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:15:28,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:15:28,377 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 205 [2021-03-24 22:15:28,377 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 103 transitions, 2906 flow. Second operand has 3 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 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) [2021-03-24 22:15:28,377 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:15:28,377 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 205 [2021-03-24 22:15:28,378 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:15:28,396 INFO L129 PetriNetUnfolder]: 0/102 cut-off events. [2021-03-24 22:15:28,396 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:28,396 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1530 conditions, 102 events. 0/102 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 92 event pairs, 0 based on Foata normal form. 51/153 useless extension candidates. Maximal degree in co-relation 0. Up to 51 conditions per place. [2021-03-24 22:15:28,396 INFO L132 encePairwiseOnDemand]: 203/205 looper letters, 0 selfloop transitions, 1 changer transitions 0/102 dead transitions. [2021-03-24 22:15:28,396 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 102 transitions, 2906 flow [2021-03-24 22:15:28,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:15:28,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:15:28,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 608 transitions. [2021-03-24 22:15:28,397 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9886178861788618 [2021-03-24 22:15:28,397 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 608 transitions. [2021-03-24 22:15:28,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 608 transitions. [2021-03-24 22:15:28,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:15:28,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 608 transitions. [2021-03-24 22:15:28,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 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) [2021-03-24 22:15:28,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 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) [2021-03-24 22:15:28,398 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 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) [2021-03-24 22:15:28,399 INFO L185 Difference]: Start difference. First operand has 204 places, 103 transitions, 2906 flow. Second operand 3 states and 608 transitions. [2021-03-24 22:15:28,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 102 transitions, 2906 flow [2021-03-24 22:15:28,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 102 transitions, 456 flow, removed 1225 selfloop flow, removed 0 redundant places. [2021-03-24 22:15:28,435 INFO L241 Difference]: Finished difference. Result has 205 places, 102 transitions, 456 flow [2021-03-24 22:15:28,435 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=456, PETRI_PLACES=205, PETRI_TRANSITIONS=102} [2021-03-24 22:15:28,435 INFO L343 CegarLoopForPetriNet]: 204 programPoint places, 1 predicate places. [2021-03-24 22:15:28,435 INFO L480 AbstractCegarLoop]: Abstraction has has 205 places, 102 transitions, 456 flow [2021-03-24 22:15:28,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 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) [2021-03-24 22:15:28,435 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:15:28,435 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:15:28,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2021-03-24 22:15:28,435 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:15:28,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:15:28,436 INFO L82 PathProgramCache]: Analyzing trace with hash 568827443, now seen corresponding path program 1 times [2021-03-24 22:15:28,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:15:28,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922411010] [2021-03-24 22:15:28,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:15:28,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:15:28,444 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:15:28,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:15:28,446 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:15:28,452 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:15:28,452 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:15:28,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2021-03-24 22:15:28,453 WARN L342 ceAbstractionStarter]: 50 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:15:28,453 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 51 thread instances. [2021-03-24 22:15:28,500 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:15:28,500 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:15:28,501 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:15:28,501 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:15:28,501 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:15:28,501 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:15:28,501 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:15:28,501 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:15:28,501 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:15:28,501 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:15:28,502 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 261 places, 158 transitions, 3121 flow [2021-03-24 22:15:28,534 INFO L129 PetriNetUnfolder]: 0/311 cut-off events. [2021-03-24 22:15:28,534 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:28,534 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1791 conditions, 311 events. 0/311 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1045 event pairs, 0 based on Foata normal form. 0/259 useless extension candidates. Maximal degree in co-relation 0. Up to 52 conditions per place. [2021-03-24 22:15:28,534 INFO L82 GeneralOperation]: Start removeDead. Operand has 261 places, 158 transitions, 3121 flow [2021-03-24 22:15:28,537 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 259 places, 156 transitions, 3117 flow [2021-03-24 22:15:28,537 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:15:28,537 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 259 places, 156 transitions, 3117 flow [2021-03-24 22:15:28,537 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 259 places, 156 transitions, 3117 flow [2021-03-24 22:15:28,539 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 259 places, 156 transitions, 3117 flow [2021-03-24 22:15:28,579 INFO L129 PetriNetUnfolder]: 0/207 cut-off events. [2021-03-24 22:15:28,579 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:28,579 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1687 conditions, 207 events. 0/207 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 550 event pairs, 0 based on Foata normal form. 0/207 useless extension candidates. Maximal degree in co-relation 0. Up to 52 conditions per place. [2021-03-24 22:15:28,591 INFO L142 LiptonReduction]: Number of co-enabled transitions 15708 [2021-03-24 22:15:32,334 INFO L154 LiptonReduction]: Checked pairs total: 6477 [2021-03-24 22:15:32,334 INFO L156 LiptonReduction]: Total number of compositions: 51 [2021-03-24 22:15:32,334 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 3797 [2021-03-24 22:15:32,335 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-03-24 22:15:32,335 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:32,335 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:15:32,335 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:15:32,335 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:15:32,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:15:32,336 INFO L82 PathProgramCache]: Analyzing trace with hash 177315, now seen corresponding path program 1 times [2021-03-24 22:15:32,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:15:32,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926569872] [2021-03-24 22:15:32,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:15:32,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:15:32,347 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:15:32,347 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:15:32,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:15:32,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926569872] [2021-03-24 22:15:32,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:15:32,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:15:32,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310750138] [2021-03-24 22:15:32,350 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:15:32,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:15:32,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:15:32,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:15:32,351 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 209 [2021-03-24 22:15:32,351 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 105 transitions, 3015 flow. Second operand has 3 states, 3 states have (on average 206.66666666666666) internal successors, (620), 3 states have internal predecessors, (620), 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) [2021-03-24 22:15:32,351 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:15:32,352 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 209 [2021-03-24 22:15:32,352 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:15:32,378 INFO L129 PetriNetUnfolder]: 0/104 cut-off events. [2021-03-24 22:15:32,378 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:32,378 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1586 conditions, 104 events. 0/104 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 107 event pairs, 0 based on Foata normal form. 52/156 useless extension candidates. Maximal degree in co-relation 0. Up to 52 conditions per place. [2021-03-24 22:15:32,379 INFO L132 encePairwiseOnDemand]: 207/209 looper letters, 0 selfloop transitions, 1 changer transitions 0/104 dead transitions. [2021-03-24 22:15:32,379 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 104 transitions, 3015 flow [2021-03-24 22:15:32,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:15:32,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:15:32,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 620 transitions. [2021-03-24 22:15:32,380 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.988835725677831 [2021-03-24 22:15:32,380 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 620 transitions. [2021-03-24 22:15:32,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 620 transitions. [2021-03-24 22:15:32,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:15:32,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 620 transitions. [2021-03-24 22:15:32,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.66666666666666) internal successors, (620), 3 states have internal predecessors, (620), 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) [2021-03-24 22:15:32,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 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) [2021-03-24 22:15:32,382 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 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) [2021-03-24 22:15:32,382 INFO L185 Difference]: Start difference. First operand has 208 places, 105 transitions, 3015 flow. Second operand 3 states and 620 transitions. [2021-03-24 22:15:32,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 104 transitions, 3015 flow [2021-03-24 22:15:32,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 104 transitions, 465 flow, removed 1275 selfloop flow, removed 0 redundant places. [2021-03-24 22:15:32,434 INFO L241 Difference]: Finished difference. Result has 209 places, 104 transitions, 465 flow [2021-03-24 22:15:32,434 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=465, PETRI_PLACES=209, PETRI_TRANSITIONS=104} [2021-03-24 22:15:32,434 INFO L343 CegarLoopForPetriNet]: 208 programPoint places, 1 predicate places. [2021-03-24 22:15:32,434 INFO L480 AbstractCegarLoop]: Abstraction has has 209 places, 104 transitions, 465 flow [2021-03-24 22:15:32,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 206.66666666666666) internal successors, (620), 3 states have internal predecessors, (620), 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) [2021-03-24 22:15:32,435 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:15:32,435 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:15:32,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2021-03-24 22:15:32,435 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:15:32,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:15:32,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1219012916, now seen corresponding path program 1 times [2021-03-24 22:15:32,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:15:32,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961286035] [2021-03-24 22:15:32,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:15:32,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:15:32,445 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:15:32,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:15:32,447 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:15:32,453 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:15:32,453 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:15:32,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2021-03-24 22:15:32,453 WARN L342 ceAbstractionStarter]: 51 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:15:32,453 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 52 thread instances. [2021-03-24 22:15:32,503 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:15:32,503 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:15:32,504 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:15:32,504 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:15:32,504 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:15:32,504 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:15:32,504 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:15:32,504 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:15:32,504 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:15:32,504 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:15:32,507 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 266 places, 161 transitions, 3234 flow [2021-03-24 22:15:32,554 INFO L129 PetriNetUnfolder]: 0/317 cut-off events. [2021-03-24 22:15:32,555 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:32,555 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1852 conditions, 317 events. 0/317 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1047 event pairs, 0 based on Foata normal form. 0/264 useless extension candidates. Maximal degree in co-relation 0. Up to 53 conditions per place. [2021-03-24 22:15:32,555 INFO L82 GeneralOperation]: Start removeDead. Operand has 266 places, 161 transitions, 3234 flow [2021-03-24 22:15:32,557 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 264 places, 159 transitions, 3230 flow [2021-03-24 22:15:32,557 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:15:32,559 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 264 places, 159 transitions, 3230 flow [2021-03-24 22:15:32,559 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 264 places, 159 transitions, 3230 flow [2021-03-24 22:15:32,561 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 264 places, 159 transitions, 3230 flow [2021-03-24 22:15:32,597 INFO L129 PetriNetUnfolder]: 0/211 cut-off events. [2021-03-24 22:15:32,598 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:32,598 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1746 conditions, 211 events. 0/211 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 628 event pairs, 0 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 0. Up to 53 conditions per place. [2021-03-24 22:15:32,610 INFO L142 LiptonReduction]: Number of co-enabled transitions 16328 [2021-03-24 22:15:36,741 INFO L154 LiptonReduction]: Checked pairs total: 6734 [2021-03-24 22:15:36,741 INFO L156 LiptonReduction]: Total number of compositions: 52 [2021-03-24 22:15:36,741 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 4184 [2021-03-24 22:15:36,742 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:15:36,742 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:36,742 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:15:36,742 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:15:36,743 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:15:36,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:15:36,743 INFO L82 PathProgramCache]: Analyzing trace with hash 184099, now seen corresponding path program 1 times [2021-03-24 22:15:36,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:15:36,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733831041] [2021-03-24 22:15:36,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:15:36,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:15:36,758 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:15:36,758 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:15:36,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:15:36,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733831041] [2021-03-24 22:15:36,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:15:36,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:15:36,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360210897] [2021-03-24 22:15:36,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:15:36,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:15:36,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:15:36,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:15:36,762 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 213 [2021-03-24 22:15:36,762 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 107 transitions, 3126 flow. Second operand has 3 states, 3 states have (on average 210.66666666666666) internal successors, (632), 3 states have internal predecessors, (632), 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) [2021-03-24 22:15:36,762 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:15:36,763 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 213 [2021-03-24 22:15:36,763 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:15:36,790 INFO L129 PetriNetUnfolder]: 0/106 cut-off events. [2021-03-24 22:15:36,790 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:36,790 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1643 conditions, 106 events. 0/106 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 124 event pairs, 0 based on Foata normal form. 53/159 useless extension candidates. Maximal degree in co-relation 0. Up to 53 conditions per place. [2021-03-24 22:15:36,790 INFO L132 encePairwiseOnDemand]: 211/213 looper letters, 0 selfloop transitions, 1 changer transitions 0/106 dead transitions. [2021-03-24 22:15:36,790 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 106 transitions, 3126 flow [2021-03-24 22:15:36,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:15:36,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:15:36,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 632 transitions. [2021-03-24 22:15:36,791 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9890453834115805 [2021-03-24 22:15:36,791 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 632 transitions. [2021-03-24 22:15:36,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 632 transitions. [2021-03-24 22:15:36,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:15:36,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 632 transitions. [2021-03-24 22:15:36,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.66666666666666) internal successors, (632), 3 states have internal predecessors, (632), 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) [2021-03-24 22:15:36,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 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) [2021-03-24 22:15:36,793 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 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) [2021-03-24 22:15:36,793 INFO L185 Difference]: Start difference. First operand has 212 places, 107 transitions, 3126 flow. Second operand 3 states and 632 transitions. [2021-03-24 22:15:36,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 106 transitions, 3126 flow [2021-03-24 22:15:36,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 106 transitions, 474 flow, removed 1326 selfloop flow, removed 0 redundant places. [2021-03-24 22:15:36,831 INFO L241 Difference]: Finished difference. Result has 213 places, 106 transitions, 474 flow [2021-03-24 22:15:36,831 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=474, PETRI_PLACES=213, PETRI_TRANSITIONS=106} [2021-03-24 22:15:36,831 INFO L343 CegarLoopForPetriNet]: 212 programPoint places, 1 predicate places. [2021-03-24 22:15:36,831 INFO L480 AbstractCegarLoop]: Abstraction has has 213 places, 106 transitions, 474 flow [2021-03-24 22:15:36,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 210.66666666666666) internal successors, (632), 3 states have internal predecessors, (632), 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) [2021-03-24 22:15:36,832 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:15:36,832 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:15:36,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-03-24 22:15:36,832 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:15:36,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:15:36,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1650121738, now seen corresponding path program 1 times [2021-03-24 22:15:36,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:15:36,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143937851] [2021-03-24 22:15:36,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:15:36,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:15:36,840 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:15:36,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:15:36,841 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:15:36,847 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:15:36,847 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:15:36,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2021-03-24 22:15:36,847 WARN L342 ceAbstractionStarter]: 52 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:15:36,847 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 53 thread instances. [2021-03-24 22:15:36,927 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:15:36,928 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:15:36,928 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:15:36,928 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:15:36,928 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:15:36,928 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:15:36,928 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:15:36,929 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:15:36,929 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:15:36,929 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:15:36,931 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 271 places, 164 transitions, 3349 flow [2021-03-24 22:15:36,981 INFO L129 PetriNetUnfolder]: 0/323 cut-off events. [2021-03-24 22:15:36,981 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:36,981 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1914 conditions, 323 events. 0/323 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1066 event pairs, 0 based on Foata normal form. 0/269 useless extension candidates. Maximal degree in co-relation 0. Up to 54 conditions per place. [2021-03-24 22:15:36,981 INFO L82 GeneralOperation]: Start removeDead. Operand has 271 places, 164 transitions, 3349 flow [2021-03-24 22:15:36,983 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 269 places, 162 transitions, 3345 flow [2021-03-24 22:15:36,983 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:15:36,983 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 269 places, 162 transitions, 3345 flow [2021-03-24 22:15:36,984 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 269 places, 162 transitions, 3345 flow [2021-03-24 22:15:36,985 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 269 places, 162 transitions, 3345 flow [2021-03-24 22:15:37,024 INFO L129 PetriNetUnfolder]: 0/215 cut-off events. [2021-03-24 22:15:37,024 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:37,024 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1806 conditions, 215 events. 0/215 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 516 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 0. Up to 54 conditions per place. [2021-03-24 22:15:37,037 INFO L142 LiptonReduction]: Number of co-enabled transitions 16960 [2021-03-24 22:15:41,355 INFO L154 LiptonReduction]: Checked pairs total: 6996 [2021-03-24 22:15:41,355 INFO L156 LiptonReduction]: Total number of compositions: 53 [2021-03-24 22:15:41,355 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 4372 [2021-03-24 22:15:41,356 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-03-24 22:15:41,356 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:41,356 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:15:41,356 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:15:41,356 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:15:41,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:15:41,357 INFO L82 PathProgramCache]: Analyzing trace with hash 191011, now seen corresponding path program 1 times [2021-03-24 22:15:41,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:15:41,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284922100] [2021-03-24 22:15:41,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:15:41,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:15:41,367 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:15:41,367 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:15:41,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:15:41,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284922100] [2021-03-24 22:15:41,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:15:41,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:15:41,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166394540] [2021-03-24 22:15:41,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:15:41,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:15:41,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:15:41,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:15:41,371 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 217 [2021-03-24 22:15:41,371 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 109 transitions, 3239 flow. Second operand has 3 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 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) [2021-03-24 22:15:41,371 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:15:41,371 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 217 [2021-03-24 22:15:41,371 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:15:41,394 INFO L129 PetriNetUnfolder]: 0/108 cut-off events. [2021-03-24 22:15:41,394 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:41,394 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1701 conditions, 108 events. 0/108 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 103 event pairs, 0 based on Foata normal form. 54/162 useless extension candidates. Maximal degree in co-relation 0. Up to 54 conditions per place. [2021-03-24 22:15:41,395 INFO L132 encePairwiseOnDemand]: 215/217 looper letters, 0 selfloop transitions, 1 changer transitions 0/108 dead transitions. [2021-03-24 22:15:41,395 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 108 transitions, 3239 flow [2021-03-24 22:15:41,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:15:41,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:15:41,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 644 transitions. [2021-03-24 22:15:41,395 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.989247311827957 [2021-03-24 22:15:41,395 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 644 transitions. [2021-03-24 22:15:41,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 644 transitions. [2021-03-24 22:15:41,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:15:41,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 644 transitions. [2021-03-24 22:15:41,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 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) [2021-03-24 22:15:41,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 217.0) internal successors, (868), 4 states have internal predecessors, (868), 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) [2021-03-24 22:15:41,397 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 217.0) internal successors, (868), 4 states have internal predecessors, (868), 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) [2021-03-24 22:15:41,397 INFO L185 Difference]: Start difference. First operand has 216 places, 109 transitions, 3239 flow. Second operand 3 states and 644 transitions. [2021-03-24 22:15:41,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 108 transitions, 3239 flow [2021-03-24 22:15:41,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 108 transitions, 483 flow, removed 1378 selfloop flow, removed 0 redundant places. [2021-03-24 22:15:41,459 INFO L241 Difference]: Finished difference. Result has 217 places, 108 transitions, 483 flow [2021-03-24 22:15:41,459 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=217, PETRI_DIFFERENCE_MINUEND_FLOW=481, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=483, PETRI_PLACES=217, PETRI_TRANSITIONS=108} [2021-03-24 22:15:41,459 INFO L343 CegarLoopForPetriNet]: 216 programPoint places, 1 predicate places. [2021-03-24 22:15:41,459 INFO L480 AbstractCegarLoop]: Abstraction has has 217 places, 108 transitions, 483 flow [2021-03-24 22:15:41,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 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) [2021-03-24 22:15:41,460 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:15:41,460 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:15:41,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2021-03-24 22:15:41,460 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:15:41,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:15:41,460 INFO L82 PathProgramCache]: Analyzing trace with hash 292165271, now seen corresponding path program 1 times [2021-03-24 22:15:41,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:15:41,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762092700] [2021-03-24 22:15:41,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:15:41,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:15:41,470 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:15:41,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:15:41,472 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:15:41,478 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:15:41,478 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:15:41,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2021-03-24 22:15:41,479 WARN L342 ceAbstractionStarter]: 53 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:15:41,479 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 54 thread instances. [2021-03-24 22:15:41,532 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:15:41,532 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:15:41,532 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:15:41,532 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:15:41,532 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:15:41,533 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:15:41,533 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:15:41,533 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:15:41,533 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:15:41,533 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:15:41,535 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 276 places, 167 transitions, 3466 flow [2021-03-24 22:15:41,591 INFO L129 PetriNetUnfolder]: 0/329 cut-off events. [2021-03-24 22:15:41,591 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:41,591 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1977 conditions, 329 events. 0/329 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1063 event pairs, 0 based on Foata normal form. 0/274 useless extension candidates. Maximal degree in co-relation 0. Up to 55 conditions per place. [2021-03-24 22:15:41,591 INFO L82 GeneralOperation]: Start removeDead. Operand has 276 places, 167 transitions, 3466 flow [2021-03-24 22:15:41,593 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 274 places, 165 transitions, 3462 flow [2021-03-24 22:15:41,593 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:15:41,593 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 274 places, 165 transitions, 3462 flow [2021-03-24 22:15:41,593 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 274 places, 165 transitions, 3462 flow [2021-03-24 22:15:41,595 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 274 places, 165 transitions, 3462 flow [2021-03-24 22:15:41,639 INFO L129 PetriNetUnfolder]: 0/219 cut-off events. [2021-03-24 22:15:41,639 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:41,639 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1867 conditions, 219 events. 0/219 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 692 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 0. Up to 55 conditions per place. [2021-03-24 22:15:41,656 INFO L142 LiptonReduction]: Number of co-enabled transitions 17604 [2021-03-24 22:15:45,845 INFO L154 LiptonReduction]: Checked pairs total: 7263 [2021-03-24 22:15:45,845 INFO L156 LiptonReduction]: Total number of compositions: 54 [2021-03-24 22:15:45,845 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 4252 [2021-03-24 22:15:45,846 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:15:45,846 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:45,846 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:15:45,846 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:15:45,846 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:15:45,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:15:45,846 INFO L82 PathProgramCache]: Analyzing trace with hash 198051, now seen corresponding path program 1 times [2021-03-24 22:15:45,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:15:45,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589966900] [2021-03-24 22:15:45,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:15:45,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:15:45,859 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:15:45,859 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:15:45,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:15:45,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589966900] [2021-03-24 22:15:45,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:15:45,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:15:45,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430291673] [2021-03-24 22:15:45,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:15:45,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:15:45,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:15:45,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:15:45,862 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 221 [2021-03-24 22:15:45,863 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 111 transitions, 3354 flow. Second operand has 3 states, 3 states have (on average 218.66666666666666) internal successors, (656), 3 states have internal predecessors, (656), 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) [2021-03-24 22:15:45,863 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:15:45,863 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 221 [2021-03-24 22:15:45,863 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:15:45,884 INFO L129 PetriNetUnfolder]: 0/110 cut-off events. [2021-03-24 22:15:45,884 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:45,885 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1760 conditions, 110 events. 0/110 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 108 event pairs, 0 based on Foata normal form. 55/165 useless extension candidates. Maximal degree in co-relation 0. Up to 55 conditions per place. [2021-03-24 22:15:45,885 INFO L132 encePairwiseOnDemand]: 219/221 looper letters, 0 selfloop transitions, 1 changer transitions 0/110 dead transitions. [2021-03-24 22:15:45,885 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 110 transitions, 3354 flow [2021-03-24 22:15:45,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:15:45,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:15:45,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 656 transitions. [2021-03-24 22:15:45,885 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9894419306184012 [2021-03-24 22:15:45,886 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 656 transitions. [2021-03-24 22:15:45,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 656 transitions. [2021-03-24 22:15:45,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:15:45,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 656 transitions. [2021-03-24 22:15:45,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 218.66666666666666) internal successors, (656), 3 states have internal predecessors, (656), 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) [2021-03-24 22:15:45,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 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) [2021-03-24 22:15:45,887 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 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) [2021-03-24 22:15:45,887 INFO L185 Difference]: Start difference. First operand has 220 places, 111 transitions, 3354 flow. Second operand 3 states and 656 transitions. [2021-03-24 22:15:45,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 110 transitions, 3354 flow [2021-03-24 22:15:46,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 110 transitions, 492 flow, removed 1431 selfloop flow, removed 0 redundant places. [2021-03-24 22:15:46,039 INFO L241 Difference]: Finished difference. Result has 221 places, 110 transitions, 492 flow [2021-03-24 22:15:46,040 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=492, PETRI_PLACES=221, PETRI_TRANSITIONS=110} [2021-03-24 22:15:46,040 INFO L343 CegarLoopForPetriNet]: 220 programPoint places, 1 predicate places. [2021-03-24 22:15:46,040 INFO L480 AbstractCegarLoop]: Abstraction has has 221 places, 110 transitions, 492 flow [2021-03-24 22:15:46,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 218.66666666666666) internal successors, (656), 3 states have internal predecessors, (656), 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) [2021-03-24 22:15:46,040 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:15:46,040 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:15:46,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2021-03-24 22:15:46,040 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:15:46,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:15:46,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1780032071, now seen corresponding path program 1 times [2021-03-24 22:15:46,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:15:46,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100476733] [2021-03-24 22:15:46,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:15:46,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:15:46,055 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:15:46,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:15:46,057 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:15:46,064 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:15:46,064 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:15:46,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2021-03-24 22:15:46,065 WARN L342 ceAbstractionStarter]: 54 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:15:46,065 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 55 thread instances. [2021-03-24 22:15:46,121 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:15:46,122 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:15:46,122 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:15:46,122 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:15:46,122 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:15:46,122 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:15:46,122 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:15:46,122 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:15:46,122 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:15:46,122 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:15:46,124 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 281 places, 170 transitions, 3585 flow [2021-03-24 22:15:46,180 INFO L129 PetriNetUnfolder]: 0/335 cut-off events. [2021-03-24 22:15:46,180 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:46,180 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2041 conditions, 335 events. 0/335 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1101 event pairs, 0 based on Foata normal form. 0/279 useless extension candidates. Maximal degree in co-relation 0. Up to 56 conditions per place. [2021-03-24 22:15:46,180 INFO L82 GeneralOperation]: Start removeDead. Operand has 281 places, 170 transitions, 3585 flow [2021-03-24 22:15:46,182 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 279 places, 168 transitions, 3581 flow [2021-03-24 22:15:46,182 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:15:46,183 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 279 places, 168 transitions, 3581 flow [2021-03-24 22:15:46,183 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 279 places, 168 transitions, 3581 flow [2021-03-24 22:15:46,184 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 279 places, 168 transitions, 3581 flow [2021-03-24 22:15:46,228 INFO L129 PetriNetUnfolder]: 0/223 cut-off events. [2021-03-24 22:15:46,228 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:46,229 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1929 conditions, 223 events. 0/223 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 625 event pairs, 0 based on Foata normal form. 0/223 useless extension candidates. Maximal degree in co-relation 0. Up to 56 conditions per place. [2021-03-24 22:15:46,245 INFO L142 LiptonReduction]: Number of co-enabled transitions 18260 [2021-03-24 22:15:50,564 INFO L154 LiptonReduction]: Checked pairs total: 7535 [2021-03-24 22:15:50,565 INFO L156 LiptonReduction]: Total number of compositions: 55 [2021-03-24 22:15:50,565 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 4383 [2021-03-24 22:15:50,565 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:15:50,566 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:50,566 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:15:50,566 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:15:50,566 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:15:50,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:15:50,566 INFO L82 PathProgramCache]: Analyzing trace with hash 205219, now seen corresponding path program 1 times [2021-03-24 22:15:50,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:15:50,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989796710] [2021-03-24 22:15:50,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:15:50,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:15:50,577 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:15:50,577 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:15:50,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:15:50,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989796710] [2021-03-24 22:15:50,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:15:50,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:15:50,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572123061] [2021-03-24 22:15:50,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:15:50,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:15:50,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:15:50,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:15:50,581 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 225 [2021-03-24 22:15:50,582 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 113 transitions, 3471 flow. Second operand has 3 states, 3 states have (on average 222.66666666666666) internal successors, (668), 3 states have internal predecessors, (668), 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) [2021-03-24 22:15:50,582 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:15:50,582 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 225 [2021-03-24 22:15:50,582 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:15:50,613 INFO L129 PetriNetUnfolder]: 0/112 cut-off events. [2021-03-24 22:15:50,613 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:50,613 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1820 conditions, 112 events. 0/112 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 105 event pairs, 0 based on Foata normal form. 56/168 useless extension candidates. Maximal degree in co-relation 0. Up to 56 conditions per place. [2021-03-24 22:15:50,614 INFO L132 encePairwiseOnDemand]: 223/225 looper letters, 0 selfloop transitions, 1 changer transitions 0/112 dead transitions. [2021-03-24 22:15:50,614 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 112 transitions, 3471 flow [2021-03-24 22:15:50,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:15:50,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:15:50,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 668 transitions. [2021-03-24 22:15:50,615 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9896296296296296 [2021-03-24 22:15:50,615 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 668 transitions. [2021-03-24 22:15:50,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 668 transitions. [2021-03-24 22:15:50,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:15:50,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 668 transitions. [2021-03-24 22:15:50,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 222.66666666666666) internal successors, (668), 3 states have internal predecessors, (668), 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) [2021-03-24 22:15:50,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 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) [2021-03-24 22:15:50,617 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 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) [2021-03-24 22:15:50,617 INFO L185 Difference]: Start difference. First operand has 224 places, 113 transitions, 3471 flow. Second operand 3 states and 668 transitions. [2021-03-24 22:15:50,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 112 transitions, 3471 flow [2021-03-24 22:15:50,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 112 transitions, 501 flow, removed 1485 selfloop flow, removed 0 redundant places. [2021-03-24 22:15:50,680 INFO L241 Difference]: Finished difference. Result has 225 places, 112 transitions, 501 flow [2021-03-24 22:15:50,680 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=501, PETRI_PLACES=225, PETRI_TRANSITIONS=112} [2021-03-24 22:15:50,680 INFO L343 CegarLoopForPetriNet]: 224 programPoint places, 1 predicate places. [2021-03-24 22:15:50,680 INFO L480 AbstractCegarLoop]: Abstraction has has 225 places, 112 transitions, 501 flow [2021-03-24 22:15:50,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 222.66666666666666) internal successors, (668), 3 states have internal predecessors, (668), 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) [2021-03-24 22:15:50,680 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:15:50,680 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:15:50,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2021-03-24 22:15:50,680 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:15:50,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:15:50,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1407430542, now seen corresponding path program 1 times [2021-03-24 22:15:50,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:15:50,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228123692] [2021-03-24 22:15:50,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:15:50,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:15:50,693 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:15:50,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:15:50,695 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:15:50,703 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:15:50,703 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:15:50,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2021-03-24 22:15:50,703 WARN L342 ceAbstractionStarter]: 55 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:15:50,703 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 56 thread instances. [2021-03-24 22:15:50,758 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:15:50,759 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:15:50,759 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:15:50,759 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:15:50,759 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:15:50,759 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:15:50,759 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:15:50,759 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:15:50,759 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:15:50,759 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:15:50,761 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 286 places, 173 transitions, 3706 flow [2021-03-24 22:15:50,819 INFO L129 PetriNetUnfolder]: 0/341 cut-off events. [2021-03-24 22:15:50,819 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:50,819 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2106 conditions, 341 events. 0/341 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1102 event pairs, 0 based on Foata normal form. 0/284 useless extension candidates. Maximal degree in co-relation 0. Up to 57 conditions per place. [2021-03-24 22:15:50,819 INFO L82 GeneralOperation]: Start removeDead. Operand has 286 places, 173 transitions, 3706 flow [2021-03-24 22:15:50,821 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 284 places, 171 transitions, 3702 flow [2021-03-24 22:15:50,821 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:15:50,821 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 284 places, 171 transitions, 3702 flow [2021-03-24 22:15:50,821 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 284 places, 171 transitions, 3702 flow [2021-03-24 22:15:50,823 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 284 places, 171 transitions, 3702 flow [2021-03-24 22:15:51,004 INFO L129 PetriNetUnfolder]: 0/227 cut-off events. [2021-03-24 22:15:51,004 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:51,004 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1992 conditions, 227 events. 0/227 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 606 event pairs, 0 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 0. Up to 57 conditions per place. [2021-03-24 22:15:51,034 INFO L142 LiptonReduction]: Number of co-enabled transitions 18928 [2021-03-24 22:15:55,518 INFO L154 LiptonReduction]: Checked pairs total: 7812 [2021-03-24 22:15:55,518 INFO L156 LiptonReduction]: Total number of compositions: 56 [2021-03-24 22:15:55,518 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 4697 [2021-03-24 22:15:55,519 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-03-24 22:15:55,519 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:55,519 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:15:55,519 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:15:55,519 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:15:55,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:15:55,519 INFO L82 PathProgramCache]: Analyzing trace with hash 212515, now seen corresponding path program 1 times [2021-03-24 22:15:55,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:15:55,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430503889] [2021-03-24 22:15:55,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:15:55,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:15:55,536 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:15:55,536 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:15:55,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:15:55,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430503889] [2021-03-24 22:15:55,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:15:55,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:15:55,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152922307] [2021-03-24 22:15:55,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:15:55,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:15:55,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:15:55,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:15:55,540 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 229 [2021-03-24 22:15:55,541 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 115 transitions, 3590 flow. Second operand has 3 states, 3 states have (on average 226.66666666666666) internal successors, (680), 3 states have internal predecessors, (680), 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) [2021-03-24 22:15:55,541 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:15:55,541 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 229 [2021-03-24 22:15:55,541 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:15:55,566 INFO L129 PetriNetUnfolder]: 0/114 cut-off events. [2021-03-24 22:15:55,566 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:55,566 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1881 conditions, 114 events. 0/114 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 104 event pairs, 0 based on Foata normal form. 57/171 useless extension candidates. Maximal degree in co-relation 0. Up to 57 conditions per place. [2021-03-24 22:15:55,567 INFO L132 encePairwiseOnDemand]: 227/229 looper letters, 0 selfloop transitions, 1 changer transitions 0/114 dead transitions. [2021-03-24 22:15:55,567 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 114 transitions, 3590 flow [2021-03-24 22:15:55,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:15:55,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:15:55,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 680 transitions. [2021-03-24 22:15:55,567 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9898107714701602 [2021-03-24 22:15:55,568 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 680 transitions. [2021-03-24 22:15:55,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 680 transitions. [2021-03-24 22:15:55,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:15:55,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 680 transitions. [2021-03-24 22:15:55,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 226.66666666666666) internal successors, (680), 3 states have internal predecessors, (680), 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) [2021-03-24 22:15:55,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 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) [2021-03-24 22:15:55,569 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 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) [2021-03-24 22:15:55,569 INFO L185 Difference]: Start difference. First operand has 228 places, 115 transitions, 3590 flow. Second operand 3 states and 680 transitions. [2021-03-24 22:15:55,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 114 transitions, 3590 flow [2021-03-24 22:15:55,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 114 transitions, 510 flow, removed 1540 selfloop flow, removed 0 redundant places. [2021-03-24 22:15:55,625 INFO L241 Difference]: Finished difference. Result has 229 places, 114 transitions, 510 flow [2021-03-24 22:15:55,626 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=508, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=510, PETRI_PLACES=229, PETRI_TRANSITIONS=114} [2021-03-24 22:15:55,626 INFO L343 CegarLoopForPetriNet]: 228 programPoint places, 1 predicate places. [2021-03-24 22:15:55,626 INFO L480 AbstractCegarLoop]: Abstraction has has 229 places, 114 transitions, 510 flow [2021-03-24 22:15:55,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 226.66666666666666) internal successors, (680), 3 states have internal predecessors, (680), 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) [2021-03-24 22:15:55,626 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:15:55,626 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:15:55,626 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2021-03-24 22:15:55,626 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:15:55,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:15:55,626 INFO L82 PathProgramCache]: Analyzing trace with hash -396701316, now seen corresponding path program 1 times [2021-03-24 22:15:55,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:15:55,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357947286] [2021-03-24 22:15:55,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:15:55,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:15:55,636 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:15:55,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:15:55,638 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:15:55,646 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:15:55,646 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:15:55,646 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2021-03-24 22:15:55,646 WARN L342 ceAbstractionStarter]: 56 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:15:55,646 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 57 thread instances. [2021-03-24 22:15:55,697 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:15:55,697 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:15:55,699 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:15:55,699 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:15:55,699 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:15:55,699 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:15:55,699 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:15:55,699 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:15:55,699 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:15:55,699 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:15:55,701 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 291 places, 176 transitions, 3829 flow [2021-03-24 22:15:55,754 INFO L129 PetriNetUnfolder]: 0/347 cut-off events. [2021-03-24 22:15:55,754 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:55,754 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2172 conditions, 347 events. 0/347 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1100 event pairs, 0 based on Foata normal form. 0/289 useless extension candidates. Maximal degree in co-relation 0. Up to 58 conditions per place. [2021-03-24 22:15:55,754 INFO L82 GeneralOperation]: Start removeDead. Operand has 291 places, 176 transitions, 3829 flow [2021-03-24 22:15:55,756 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 289 places, 174 transitions, 3825 flow [2021-03-24 22:15:55,756 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:15:55,756 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 289 places, 174 transitions, 3825 flow [2021-03-24 22:15:55,756 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 289 places, 174 transitions, 3825 flow [2021-03-24 22:15:55,758 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 289 places, 174 transitions, 3825 flow [2021-03-24 22:15:55,801 INFO L129 PetriNetUnfolder]: 0/231 cut-off events. [2021-03-24 22:15:55,801 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:15:55,801 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2056 conditions, 231 events. 0/231 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 676 event pairs, 0 based on Foata normal form. 0/231 useless extension candidates. Maximal degree in co-relation 0. Up to 58 conditions per place. [2021-03-24 22:15:55,812 INFO L142 LiptonReduction]: Number of co-enabled transitions 19608 [2021-03-24 22:16:00,520 INFO L154 LiptonReduction]: Checked pairs total: 8094 [2021-03-24 22:16:00,520 INFO L156 LiptonReduction]: Total number of compositions: 57 [2021-03-24 22:16:00,520 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 4764 [2021-03-24 22:16:00,521 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-03-24 22:16:00,521 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:16:00,521 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:16:00,521 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:16:00,521 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:16:00,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:16:00,521 INFO L82 PathProgramCache]: Analyzing trace with hash 219939, now seen corresponding path program 1 times [2021-03-24 22:16:00,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:16:00,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841155665] [2021-03-24 22:16:00,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:16:00,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:16:00,533 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:16:00,533 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:16:00,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:16:00,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841155665] [2021-03-24 22:16:00,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:16:00,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:16:00,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251597686] [2021-03-24 22:16:00,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:16:00,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:16:00,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:16:00,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:16:00,537 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 233 [2021-03-24 22:16:00,537 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 117 transitions, 3711 flow. Second operand has 3 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 states have internal predecessors, (692), 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) [2021-03-24 22:16:00,537 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:16:00,537 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 233 [2021-03-24 22:16:00,537 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:16:00,568 INFO L129 PetriNetUnfolder]: 0/116 cut-off events. [2021-03-24 22:16:00,568 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:16:00,568 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1943 conditions, 116 events. 0/116 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 111 event pairs, 0 based on Foata normal form. 58/174 useless extension candidates. Maximal degree in co-relation 0. Up to 58 conditions per place. [2021-03-24 22:16:00,569 INFO L132 encePairwiseOnDemand]: 231/233 looper letters, 0 selfloop transitions, 1 changer transitions 0/116 dead transitions. [2021-03-24 22:16:00,569 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 116 transitions, 3711 flow [2021-03-24 22:16:00,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:16:00,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:16:00,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 692 transitions. [2021-03-24 22:16:00,570 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9899856938483548 [2021-03-24 22:16:00,570 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 692 transitions. [2021-03-24 22:16:00,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 692 transitions. [2021-03-24 22:16:00,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:16:00,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 692 transitions. [2021-03-24 22:16:00,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 states have internal predecessors, (692), 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) [2021-03-24 22:16:00,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 233.0) internal successors, (932), 4 states have internal predecessors, (932), 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) [2021-03-24 22:16:00,571 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 233.0) internal successors, (932), 4 states have internal predecessors, (932), 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) [2021-03-24 22:16:00,571 INFO L185 Difference]: Start difference. First operand has 232 places, 117 transitions, 3711 flow. Second operand 3 states and 692 transitions. [2021-03-24 22:16:00,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 116 transitions, 3711 flow [2021-03-24 22:16:00,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 116 transitions, 519 flow, removed 1596 selfloop flow, removed 0 redundant places. [2021-03-24 22:16:00,622 INFO L241 Difference]: Finished difference. Result has 233 places, 116 transitions, 519 flow [2021-03-24 22:16:00,622 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=517, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=519, PETRI_PLACES=233, PETRI_TRANSITIONS=116} [2021-03-24 22:16:00,622 INFO L343 CegarLoopForPetriNet]: 232 programPoint places, 1 predicate places. [2021-03-24 22:16:00,622 INFO L480 AbstractCegarLoop]: Abstraction has has 233 places, 116 transitions, 519 flow [2021-03-24 22:16:00,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 states have internal predecessors, (692), 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) [2021-03-24 22:16:00,622 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:16:00,622 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:16:00,623 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2021-03-24 22:16:00,623 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:16:00,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:16:00,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1672576605, now seen corresponding path program 1 times [2021-03-24 22:16:00,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:16:00,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712639949] [2021-03-24 22:16:00,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:16:00,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:16:00,635 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:16:00,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:16:00,637 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:16:00,646 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:16:00,646 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:16:00,646 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2021-03-24 22:16:00,646 WARN L342 ceAbstractionStarter]: 57 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:16:00,646 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 58 thread instances. [2021-03-24 22:16:00,701 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:16:00,702 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:16:00,702 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:16:00,702 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:16:00,702 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:16:00,702 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:16:00,702 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:16:00,702 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:16:00,702 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:16:00,702 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:16:00,705 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 296 places, 179 transitions, 3954 flow [2021-03-24 22:16:00,756 INFO L129 PetriNetUnfolder]: 0/353 cut-off events. [2021-03-24 22:16:00,757 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:16:00,757 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2239 conditions, 353 events. 0/353 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1158 event pairs, 0 based on Foata normal form. 0/294 useless extension candidates. Maximal degree in co-relation 0. Up to 59 conditions per place. [2021-03-24 22:16:00,757 INFO L82 GeneralOperation]: Start removeDead. Operand has 296 places, 179 transitions, 3954 flow [2021-03-24 22:16:00,759 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 294 places, 177 transitions, 3950 flow [2021-03-24 22:16:00,759 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:16:00,759 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 294 places, 177 transitions, 3950 flow [2021-03-24 22:16:00,759 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 294 places, 177 transitions, 3950 flow [2021-03-24 22:16:00,761 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 294 places, 177 transitions, 3950 flow [2021-03-24 22:16:00,809 INFO L129 PetriNetUnfolder]: 0/235 cut-off events. [2021-03-24 22:16:00,809 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:16:00,809 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2121 conditions, 235 events. 0/235 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 636 event pairs, 0 based on Foata normal form. 0/235 useless extension candidates. Maximal degree in co-relation 0. Up to 59 conditions per place. [2021-03-24 22:16:00,821 INFO L142 LiptonReduction]: Number of co-enabled transitions 20300 [2021-03-24 22:16:05,985 INFO L154 LiptonReduction]: Checked pairs total: 8381 [2021-03-24 22:16:05,985 INFO L156 LiptonReduction]: Total number of compositions: 58 [2021-03-24 22:16:05,985 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 5226 [2021-03-24 22:16:05,986 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:16:05,986 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:16:05,986 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:16:05,986 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:16:05,986 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:16:05,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:16:05,986 INFO L82 PathProgramCache]: Analyzing trace with hash 227491, now seen corresponding path program 1 times [2021-03-24 22:16:05,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:16:05,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653579504] [2021-03-24 22:16:05,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:16:05,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:16:05,996 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:16:05,998 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:16:06,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:16:06,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653579504] [2021-03-24 22:16:06,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:16:06,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:16:06,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612519205] [2021-03-24 22:16:06,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:16:06,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:16:06,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:16:06,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:16:06,006 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 237 [2021-03-24 22:16:06,007 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 119 transitions, 3834 flow. Second operand has 3 states, 3 states have (on average 234.66666666666666) internal successors, (704), 3 states have internal predecessors, (704), 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) [2021-03-24 22:16:06,007 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:16:06,007 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 237 [2021-03-24 22:16:06,007 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:16:06,039 INFO L129 PetriNetUnfolder]: 0/118 cut-off events. [2021-03-24 22:16:06,039 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:16:06,039 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2006 conditions, 118 events. 0/118 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 100 event pairs, 0 based on Foata normal form. 59/177 useless extension candidates. Maximal degree in co-relation 0. Up to 59 conditions per place. [2021-03-24 22:16:06,039 INFO L132 encePairwiseOnDemand]: 235/237 looper letters, 0 selfloop transitions, 1 changer transitions 0/118 dead transitions. [2021-03-24 22:16:06,040 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 118 transitions, 3834 flow [2021-03-24 22:16:06,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:16:06,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:16:06,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 704 transitions. [2021-03-24 22:16:06,040 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9901547116736991 [2021-03-24 22:16:06,041 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 704 transitions. [2021-03-24 22:16:06,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 704 transitions. [2021-03-24 22:16:06,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:16:06,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 704 transitions. [2021-03-24 22:16:06,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 234.66666666666666) internal successors, (704), 3 states have internal predecessors, (704), 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) [2021-03-24 22:16:06,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 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) [2021-03-24 22:16:06,042 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 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) [2021-03-24 22:16:06,042 INFO L185 Difference]: Start difference. First operand has 236 places, 119 transitions, 3834 flow. Second operand 3 states and 704 transitions. [2021-03-24 22:16:06,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 118 transitions, 3834 flow [2021-03-24 22:16:06,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 118 transitions, 528 flow, removed 1653 selfloop flow, removed 0 redundant places. [2021-03-24 22:16:06,101 INFO L241 Difference]: Finished difference. Result has 237 places, 118 transitions, 528 flow [2021-03-24 22:16:06,101 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=526, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=528, PETRI_PLACES=237, PETRI_TRANSITIONS=118} [2021-03-24 22:16:06,101 INFO L343 CegarLoopForPetriNet]: 236 programPoint places, 1 predicate places. [2021-03-24 22:16:06,101 INFO L480 AbstractCegarLoop]: Abstraction has has 237 places, 118 transitions, 528 flow [2021-03-24 22:16:06,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 234.66666666666666) internal successors, (704), 3 states have internal predecessors, (704), 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) [2021-03-24 22:16:06,101 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:16:06,102 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:16:06,102 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2021-03-24 22:16:06,102 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:16:06,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:16:06,102 INFO L82 PathProgramCache]: Analyzing trace with hash 874251583, now seen corresponding path program 1 times [2021-03-24 22:16:06,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:16:06,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998608855] [2021-03-24 22:16:06,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:16:06,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:16:06,112 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:16:06,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:16:06,114 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:16:06,122 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:16:06,122 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:16:06,122 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2021-03-24 22:16:06,122 WARN L342 ceAbstractionStarter]: 58 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:16:06,122 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 59 thread instances. [2021-03-24 22:16:06,171 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:16:06,172 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:16:06,172 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:16:06,172 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:16:06,172 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:16:06,172 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:16:06,172 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:16:06,172 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:16:06,172 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:16:06,172 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:16:06,174 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 301 places, 182 transitions, 4081 flow [2021-03-24 22:16:06,223 INFO L129 PetriNetUnfolder]: 0/359 cut-off events. [2021-03-24 22:16:06,223 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:16:06,223 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2307 conditions, 359 events. 0/359 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1189 event pairs, 0 based on Foata normal form. 0/299 useless extension candidates. Maximal degree in co-relation 0. Up to 60 conditions per place. [2021-03-24 22:16:06,223 INFO L82 GeneralOperation]: Start removeDead. Operand has 301 places, 182 transitions, 4081 flow [2021-03-24 22:16:06,225 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 299 places, 180 transitions, 4077 flow [2021-03-24 22:16:06,225 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:16:06,225 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 299 places, 180 transitions, 4077 flow [2021-03-24 22:16:06,225 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 299 places, 180 transitions, 4077 flow [2021-03-24 22:16:06,226 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 299 places, 180 transitions, 4077 flow [2021-03-24 22:16:06,262 INFO L129 PetriNetUnfolder]: 0/239 cut-off events. [2021-03-24 22:16:06,262 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:16:06,262 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2187 conditions, 239 events. 0/239 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 719 event pairs, 0 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 0. Up to 60 conditions per place. [2021-03-24 22:16:06,275 INFO L142 LiptonReduction]: Number of co-enabled transitions 21004 [2021-03-24 22:16:06,658 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-03-24 22:16:11,474 INFO L154 LiptonReduction]: Checked pairs total: 8673 [2021-03-24 22:16:11,474 INFO L156 LiptonReduction]: Total number of compositions: 59 [2021-03-24 22:16:11,475 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 5250 [2021-03-24 22:16:11,475 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-03-24 22:16:11,475 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:16:11,475 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:16:11,475 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:16:11,476 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:16:11,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:16:11,476 INFO L82 PathProgramCache]: Analyzing trace with hash 235171, now seen corresponding path program 1 times [2021-03-24 22:16:11,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:16:11,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272630400] [2021-03-24 22:16:11,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:16:11,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:16:11,486 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:16:11,486 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:16:11,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:16:11,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272630400] [2021-03-24 22:16:11,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:16:11,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:16:11,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643580046] [2021-03-24 22:16:11,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:16:11,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:16:11,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:16:11,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:16:11,490 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 241 [2021-03-24 22:16:11,490 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 121 transitions, 3959 flow. Second operand has 3 states, 3 states have (on average 238.66666666666666) internal successors, (716), 3 states have internal predecessors, (716), 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) [2021-03-24 22:16:11,490 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:16:11,490 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 241 [2021-03-24 22:16:11,490 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:16:11,525 INFO L129 PetriNetUnfolder]: 0/120 cut-off events. [2021-03-24 22:16:11,525 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:16:11,525 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2070 conditions, 120 events. 0/120 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 111 event pairs, 0 based on Foata normal form. 60/180 useless extension candidates. Maximal degree in co-relation 0. Up to 60 conditions per place. [2021-03-24 22:16:11,525 INFO L132 encePairwiseOnDemand]: 239/241 looper letters, 0 selfloop transitions, 1 changer transitions 0/120 dead transitions. [2021-03-24 22:16:11,525 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 120 transitions, 3959 flow [2021-03-24 22:16:11,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:16:11,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:16:11,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 716 transitions. [2021-03-24 22:16:11,526 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9903181189488244 [2021-03-24 22:16:11,526 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 716 transitions. [2021-03-24 22:16:11,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 716 transitions. [2021-03-24 22:16:11,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:16:11,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 716 transitions. [2021-03-24 22:16:11,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 238.66666666666666) internal successors, (716), 3 states have internal predecessors, (716), 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) [2021-03-24 22:16:11,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 241.0) internal successors, (964), 4 states have internal predecessors, (964), 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) [2021-03-24 22:16:11,528 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 241.0) internal successors, (964), 4 states have internal predecessors, (964), 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) [2021-03-24 22:16:11,528 INFO L185 Difference]: Start difference. First operand has 240 places, 121 transitions, 3959 flow. Second operand 3 states and 716 transitions. [2021-03-24 22:16:11,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 120 transitions, 3959 flow [2021-03-24 22:16:11,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 120 transitions, 537 flow, removed 1711 selfloop flow, removed 0 redundant places. [2021-03-24 22:16:11,611 INFO L241 Difference]: Finished difference. Result has 241 places, 120 transitions, 537 flow [2021-03-24 22:16:11,611 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=535, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=537, PETRI_PLACES=241, PETRI_TRANSITIONS=120} [2021-03-24 22:16:11,611 INFO L343 CegarLoopForPetriNet]: 240 programPoint places, 1 predicate places. [2021-03-24 22:16:11,611 INFO L480 AbstractCegarLoop]: Abstraction has has 241 places, 120 transitions, 537 flow [2021-03-24 22:16:11,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 238.66666666666666) internal successors, (716), 3 states have internal predecessors, (716), 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) [2021-03-24 22:16:11,611 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:16:11,612 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:16:11,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2021-03-24 22:16:11,612 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:16:11,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:16:11,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1755309480, now seen corresponding path program 1 times [2021-03-24 22:16:11,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:16:11,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836958233] [2021-03-24 22:16:11,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:16:11,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:16:11,624 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:16:11,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:16:11,626 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:16:11,635 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:16:11,635 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:16:11,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2021-03-24 22:16:11,635 WARN L342 ceAbstractionStarter]: 59 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:16:11,635 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 60 thread instances. [2021-03-24 22:16:11,695 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:16:11,695 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:16:11,696 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:16:11,696 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:16:11,696 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:16:11,696 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:16:11,696 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:16:11,696 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:16:11,696 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:16:11,696 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:16:11,698 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 306 places, 185 transitions, 4210 flow [2021-03-24 22:16:11,749 INFO L129 PetriNetUnfolder]: 0/365 cut-off events. [2021-03-24 22:16:11,749 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:16:11,749 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2376 conditions, 365 events. 0/365 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1233 event pairs, 0 based on Foata normal form. 0/304 useless extension candidates. Maximal degree in co-relation 0. Up to 61 conditions per place. [2021-03-24 22:16:11,749 INFO L82 GeneralOperation]: Start removeDead. Operand has 306 places, 185 transitions, 4210 flow [2021-03-24 22:16:11,751 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 304 places, 183 transitions, 4206 flow [2021-03-24 22:16:11,752 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:16:11,752 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 304 places, 183 transitions, 4206 flow [2021-03-24 22:16:11,752 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 304 places, 183 transitions, 4206 flow [2021-03-24 22:16:11,753 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 304 places, 183 transitions, 4206 flow [2021-03-24 22:16:11,804 INFO L129 PetriNetUnfolder]: 0/243 cut-off events. [2021-03-24 22:16:11,804 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:16:11,804 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2254 conditions, 243 events. 0/243 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 690 event pairs, 0 based on Foata normal form. 0/243 useless extension candidates. Maximal degree in co-relation 0. Up to 61 conditions per place. [2021-03-24 22:16:11,817 INFO L142 LiptonReduction]: Number of co-enabled transitions 21720 [2021-03-24 22:16:17,156 INFO L154 LiptonReduction]: Checked pairs total: 8970 [2021-03-24 22:16:17,156 INFO L156 LiptonReduction]: Total number of compositions: 60 [2021-03-24 22:16:17,156 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 5405 [2021-03-24 22:16:17,157 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-03-24 22:16:17,157 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:16:17,157 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:16:17,157 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:16:17,157 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:16:17,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:16:17,158 INFO L82 PathProgramCache]: Analyzing trace with hash 242979, now seen corresponding path program 1 times [2021-03-24 22:16:17,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:16:17,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540143395] [2021-03-24 22:16:17,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:16:17,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:16:17,170 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:16:17,170 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:16:17,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:16:17,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540143395] [2021-03-24 22:16:17,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:16:17,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:16:17,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408908945] [2021-03-24 22:16:17,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:16:17,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:16:17,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:16:17,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:16:17,174 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 245 [2021-03-24 22:16:17,174 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 123 transitions, 4086 flow. Second operand has 3 states, 3 states have (on average 242.66666666666666) internal successors, (728), 3 states have internal predecessors, (728), 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) [2021-03-24 22:16:17,174 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:16:17,174 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 245 [2021-03-24 22:16:17,174 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:16:17,201 INFO L129 PetriNetUnfolder]: 0/122 cut-off events. [2021-03-24 22:16:17,201 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:16:17,201 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2135 conditions, 122 events. 0/122 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 118 event pairs, 0 based on Foata normal form. 61/183 useless extension candidates. Maximal degree in co-relation 0. Up to 61 conditions per place. [2021-03-24 22:16:17,201 INFO L132 encePairwiseOnDemand]: 243/245 looper letters, 0 selfloop transitions, 1 changer transitions 0/122 dead transitions. [2021-03-24 22:16:17,201 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 122 transitions, 4086 flow [2021-03-24 22:16:17,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:16:17,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:16:17,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 728 transitions. [2021-03-24 22:16:17,202 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9904761904761905 [2021-03-24 22:16:17,202 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 728 transitions. [2021-03-24 22:16:17,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 728 transitions. [2021-03-24 22:16:17,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:16:17,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 728 transitions. [2021-03-24 22:16:17,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 242.66666666666666) internal successors, (728), 3 states have internal predecessors, (728), 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) [2021-03-24 22:16:17,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 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) [2021-03-24 22:16:17,203 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 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) [2021-03-24 22:16:17,203 INFO L185 Difference]: Start difference. First operand has 244 places, 123 transitions, 4086 flow. Second operand 3 states and 728 transitions. [2021-03-24 22:16:17,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 122 transitions, 4086 flow [2021-03-24 22:16:17,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 122 transitions, 546 flow, removed 1770 selfloop flow, removed 0 redundant places. [2021-03-24 22:16:17,264 INFO L241 Difference]: Finished difference. Result has 245 places, 122 transitions, 546 flow [2021-03-24 22:16:17,264 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=544, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=546, PETRI_PLACES=245, PETRI_TRANSITIONS=122} [2021-03-24 22:16:17,264 INFO L343 CegarLoopForPetriNet]: 244 programPoint places, 1 predicate places. [2021-03-24 22:16:17,264 INFO L480 AbstractCegarLoop]: Abstraction has has 245 places, 122 transitions, 546 flow [2021-03-24 22:16:17,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 242.66666666666666) internal successors, (728), 3 states have internal predecessors, (728), 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) [2021-03-24 22:16:17,264 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:16:17,264 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:16:17,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2021-03-24 22:16:17,264 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:16:17,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:16:17,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1829601534, now seen corresponding path program 1 times [2021-03-24 22:16:17,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:16:17,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162837741] [2021-03-24 22:16:17,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:16:17,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:16:17,275 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:16:17,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:16:17,277 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:16:17,286 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:16:17,286 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:16:17,286 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2021-03-24 22:16:17,286 WARN L342 ceAbstractionStarter]: 60 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:16:17,287 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 61 thread instances. [2021-03-24 22:16:17,345 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:16:17,345 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:16:17,346 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:16:17,346 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:16:17,346 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:16:17,346 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:16:17,346 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:16:17,346 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:16:17,346 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:16:17,346 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:16:17,348 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 311 places, 188 transitions, 4341 flow [2021-03-24 22:16:17,402 INFO L129 PetriNetUnfolder]: 0/371 cut-off events. [2021-03-24 22:16:17,402 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:16:17,403 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2446 conditions, 371 events. 0/371 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1193 event pairs, 0 based on Foata normal form. 0/309 useless extension candidates. Maximal degree in co-relation 0. Up to 62 conditions per place. [2021-03-24 22:16:17,403 INFO L82 GeneralOperation]: Start removeDead. Operand has 311 places, 188 transitions, 4341 flow [2021-03-24 22:16:17,404 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 309 places, 186 transitions, 4337 flow [2021-03-24 22:16:17,404 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:16:17,404 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 309 places, 186 transitions, 4337 flow [2021-03-24 22:16:17,404 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 309 places, 186 transitions, 4337 flow [2021-03-24 22:16:17,406 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 309 places, 186 transitions, 4337 flow [2021-03-24 22:16:17,445 INFO L129 PetriNetUnfolder]: 0/247 cut-off events. [2021-03-24 22:16:17,446 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:16:17,446 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2322 conditions, 247 events. 0/247 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 683 event pairs, 0 based on Foata normal form. 0/247 useless extension candidates. Maximal degree in co-relation 0. Up to 62 conditions per place. [2021-03-24 22:16:17,459 INFO L142 LiptonReduction]: Number of co-enabled transitions 22448 [2021-03-24 22:16:23,005 INFO L154 LiptonReduction]: Checked pairs total: 9272 [2021-03-24 22:16:23,005 INFO L156 LiptonReduction]: Total number of compositions: 61 [2021-03-24 22:16:23,006 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 5602 [2021-03-24 22:16:23,006 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-03-24 22:16:23,006 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:16:23,006 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:16:23,006 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:16:23,006 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:16:23,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:16:23,007 INFO L82 PathProgramCache]: Analyzing trace with hash 250915, now seen corresponding path program 1 times [2021-03-24 22:16:23,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:16:23,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662171320] [2021-03-24 22:16:23,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:16:23,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:16:23,017 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:16:23,018 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:16:23,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:16:23,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662171320] [2021-03-24 22:16:23,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:16:23,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:16:23,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873853909] [2021-03-24 22:16:23,020 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:16:23,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:16:23,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:16:23,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:16:23,021 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 249 [2021-03-24 22:16:23,021 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 125 transitions, 4215 flow. Second operand has 3 states, 3 states have (on average 246.66666666666666) internal successors, (740), 3 states have internal predecessors, (740), 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) [2021-03-24 22:16:23,021 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:16:23,021 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 249 [2021-03-24 22:16:23,021 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:16:23,049 INFO L129 PetriNetUnfolder]: 0/124 cut-off events. [2021-03-24 22:16:23,049 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:16:23,049 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2201 conditions, 124 events. 0/124 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 135 event pairs, 0 based on Foata normal form. 62/186 useless extension candidates. Maximal degree in co-relation 0. Up to 62 conditions per place. [2021-03-24 22:16:23,049 INFO L132 encePairwiseOnDemand]: 247/249 looper letters, 0 selfloop transitions, 1 changer transitions 0/124 dead transitions. [2021-03-24 22:16:23,049 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 124 transitions, 4215 flow [2021-03-24 22:16:23,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:16:23,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:16:23,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 740 transitions. [2021-03-24 22:16:23,050 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9906291834002677 [2021-03-24 22:16:23,050 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 740 transitions. [2021-03-24 22:16:23,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 740 transitions. [2021-03-24 22:16:23,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:16:23,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 740 transitions. [2021-03-24 22:16:23,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 246.66666666666666) internal successors, (740), 3 states have internal predecessors, (740), 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) [2021-03-24 22:16:23,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 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) [2021-03-24 22:16:23,052 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 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) [2021-03-24 22:16:23,052 INFO L185 Difference]: Start difference. First operand has 248 places, 125 transitions, 4215 flow. Second operand 3 states and 740 transitions. [2021-03-24 22:16:23,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 124 transitions, 4215 flow [2021-03-24 22:16:23,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 124 transitions, 555 flow, removed 1830 selfloop flow, removed 0 redundant places. [2021-03-24 22:16:23,119 INFO L241 Difference]: Finished difference. Result has 249 places, 124 transitions, 555 flow [2021-03-24 22:16:23,119 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=553, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=555, PETRI_PLACES=249, PETRI_TRANSITIONS=124} [2021-03-24 22:16:23,119 INFO L343 CegarLoopForPetriNet]: 248 programPoint places, 1 predicate places. [2021-03-24 22:16:23,119 INFO L480 AbstractCegarLoop]: Abstraction has has 249 places, 124 transitions, 555 flow [2021-03-24 22:16:23,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 246.66666666666666) internal successors, (740), 3 states have internal predecessors, (740), 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) [2021-03-24 22:16:23,119 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:16:23,120 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:16:23,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2021-03-24 22:16:23,120 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:16:23,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:16:23,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1408131485, now seen corresponding path program 1 times [2021-03-24 22:16:23,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:16:23,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252661652] [2021-03-24 22:16:23,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:16:23,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:16:23,130 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:16:23,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:16:23,132 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:16:23,140 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:16:23,140 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:16:23,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2021-03-24 22:16:23,140 WARN L342 ceAbstractionStarter]: 61 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:16:23,141 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 62 thread instances. [2021-03-24 22:16:23,194 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:16:23,194 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:16:23,195 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:16:23,195 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:16:23,195 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:16:23,195 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:16:23,195 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:16:23,195 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:16:23,195 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:16:23,195 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:16:23,197 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 316 places, 191 transitions, 4474 flow [2021-03-24 22:16:23,249 INFO L129 PetriNetUnfolder]: 0/377 cut-off events. [2021-03-24 22:16:23,249 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:16:23,249 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2517 conditions, 377 events. 0/377 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1230 event pairs, 0 based on Foata normal form. 0/314 useless extension candidates. Maximal degree in co-relation 0. Up to 63 conditions per place. [2021-03-24 22:16:23,249 INFO L82 GeneralOperation]: Start removeDead. Operand has 316 places, 191 transitions, 4474 flow [2021-03-24 22:16:23,250 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 314 places, 189 transitions, 4470 flow [2021-03-24 22:16:23,251 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:16:23,251 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 314 places, 189 transitions, 4470 flow [2021-03-24 22:16:23,251 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 314 places, 189 transitions, 4470 flow [2021-03-24 22:16:23,252 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 314 places, 189 transitions, 4470 flow [2021-03-24 22:16:23,291 INFO L129 PetriNetUnfolder]: 0/251 cut-off events. [2021-03-24 22:16:23,291 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:16:23,291 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2391 conditions, 251 events. 0/251 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 787 event pairs, 0 based on Foata normal form. 0/251 useless extension candidates. Maximal degree in co-relation 0. Up to 63 conditions per place. [2021-03-24 22:16:23,305 INFO L142 LiptonReduction]: Number of co-enabled transitions 23188 [2021-03-24 22:16:29,310 INFO L154 LiptonReduction]: Checked pairs total: 9579 [2021-03-24 22:16:29,310 INFO L156 LiptonReduction]: Total number of compositions: 62 [2021-03-24 22:16:29,310 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 6059 [2021-03-24 22:16:29,311 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:16:29,311 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:16:29,311 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:16:29,311 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:16:29,311 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:16:29,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:16:29,311 INFO L82 PathProgramCache]: Analyzing trace with hash 258979, now seen corresponding path program 1 times [2021-03-24 22:16:29,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:16:29,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659855278] [2021-03-24 22:16:29,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:16:29,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:16:29,322 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:16:29,322 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:16:29,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:16:29,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659855278] [2021-03-24 22:16:29,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:16:29,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:16:29,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456281022] [2021-03-24 22:16:29,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:16:29,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:16:29,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:16:29,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:16:29,326 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 253 [2021-03-24 22:16:29,326 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 127 transitions, 4346 flow. Second operand has 3 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 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) [2021-03-24 22:16:29,326 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:16:29,326 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 253 [2021-03-24 22:16:29,326 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:16:29,354 INFO L129 PetriNetUnfolder]: 0/126 cut-off events. [2021-03-24 22:16:29,354 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:16:29,355 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2268 conditions, 126 events. 0/126 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 126 event pairs, 0 based on Foata normal form. 63/189 useless extension candidates. Maximal degree in co-relation 0. Up to 63 conditions per place. [2021-03-24 22:16:29,355 INFO L132 encePairwiseOnDemand]: 251/253 looper letters, 0 selfloop transitions, 1 changer transitions 0/126 dead transitions. [2021-03-24 22:16:29,355 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 126 transitions, 4346 flow [2021-03-24 22:16:29,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:16:29,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:16:29,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 752 transitions. [2021-03-24 22:16:29,356 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9907773386034255 [2021-03-24 22:16:29,356 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 752 transitions. [2021-03-24 22:16:29,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 752 transitions. [2021-03-24 22:16:29,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:16:29,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 752 transitions. [2021-03-24 22:16:29,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 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) [2021-03-24 22:16:29,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 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) [2021-03-24 22:16:29,358 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 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) [2021-03-24 22:16:29,358 INFO L185 Difference]: Start difference. First operand has 252 places, 127 transitions, 4346 flow. Second operand 3 states and 752 transitions. [2021-03-24 22:16:29,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 126 transitions, 4346 flow [2021-03-24 22:16:29,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 126 transitions, 564 flow, removed 1891 selfloop flow, removed 0 redundant places. [2021-03-24 22:16:29,435 INFO L241 Difference]: Finished difference. Result has 253 places, 126 transitions, 564 flow [2021-03-24 22:16:29,436 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=562, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=564, PETRI_PLACES=253, PETRI_TRANSITIONS=126} [2021-03-24 22:16:29,436 INFO L343 CegarLoopForPetriNet]: 252 programPoint places, 1 predicate places. [2021-03-24 22:16:29,436 INFO L480 AbstractCegarLoop]: Abstraction has has 253 places, 126 transitions, 564 flow [2021-03-24 22:16:29,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 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) [2021-03-24 22:16:29,436 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:16:29,436 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:16:29,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2021-03-24 22:16:29,436 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:16:29,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:16:29,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1519600837, now seen corresponding path program 1 times [2021-03-24 22:16:29,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:16:29,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966852877] [2021-03-24 22:16:29,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:16:29,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:16:29,446 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:16:29,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:16:29,447 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:16:29,455 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:16:29,455 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:16:29,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2021-03-24 22:16:29,455 WARN L342 ceAbstractionStarter]: 62 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:16:29,455 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 63 thread instances. [2021-03-24 22:16:29,509 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:16:29,509 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:16:29,509 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:16:29,509 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:16:29,509 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:16:29,509 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:16:29,509 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:16:29,509 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:16:29,509 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:16:29,510 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:16:29,512 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 321 places, 194 transitions, 4609 flow [2021-03-24 22:16:29,566 INFO L129 PetriNetUnfolder]: 0/383 cut-off events. [2021-03-24 22:16:29,566 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:16:29,566 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2589 conditions, 383 events. 0/383 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1401 event pairs, 0 based on Foata normal form. 0/319 useless extension candidates. Maximal degree in co-relation 0. Up to 64 conditions per place. [2021-03-24 22:16:29,566 INFO L82 GeneralOperation]: Start removeDead. Operand has 321 places, 194 transitions, 4609 flow [2021-03-24 22:16:29,568 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 319 places, 192 transitions, 4605 flow [2021-03-24 22:16:29,568 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:16:29,568 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 319 places, 192 transitions, 4605 flow [2021-03-24 22:16:29,568 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 319 places, 192 transitions, 4605 flow [2021-03-24 22:16:29,569 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 319 places, 192 transitions, 4605 flow [2021-03-24 22:16:29,617 INFO L129 PetriNetUnfolder]: 0/255 cut-off events. [2021-03-24 22:16:29,617 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:16:29,617 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2461 conditions, 255 events. 0/255 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 689 event pairs, 0 based on Foata normal form. 0/255 useless extension candidates. Maximal degree in co-relation 0. Up to 64 conditions per place. [2021-03-24 22:16:29,639 INFO L142 LiptonReduction]: Number of co-enabled transitions 23940 [2021-03-24 22:16:35,755 INFO L154 LiptonReduction]: Checked pairs total: 9891 [2021-03-24 22:16:35,755 INFO L156 LiptonReduction]: Total number of compositions: 63 [2021-03-24 22:16:35,755 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 6187 [2021-03-24 22:16:35,756 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:16:35,756 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:16:35,756 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:16:35,756 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:16:35,756 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:16:35,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:16:35,757 INFO L82 PathProgramCache]: Analyzing trace with hash 267171, now seen corresponding path program 1 times [2021-03-24 22:16:35,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:16:35,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615109708] [2021-03-24 22:16:35,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:16:35,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:16:35,768 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:16:35,768 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:16:35,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:16:35,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615109708] [2021-03-24 22:16:35,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:16:35,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:16:35,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459744277] [2021-03-24 22:16:35,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:16:35,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:16:35,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:16:35,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:16:35,772 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 257 [2021-03-24 22:16:35,772 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 129 transitions, 4479 flow. Second operand has 3 states, 3 states have (on average 254.66666666666666) internal successors, (764), 3 states have internal predecessors, (764), 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) [2021-03-24 22:16:35,772 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:16:35,772 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 257 [2021-03-24 22:16:35,772 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:16:35,802 INFO L129 PetriNetUnfolder]: 0/128 cut-off events. [2021-03-24 22:16:35,802 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:16:35,802 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2336 conditions, 128 events. 0/128 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 123 event pairs, 0 based on Foata normal form. 64/192 useless extension candidates. Maximal degree in co-relation 0. Up to 64 conditions per place. [2021-03-24 22:16:35,802 INFO L132 encePairwiseOnDemand]: 255/257 looper letters, 0 selfloop transitions, 1 changer transitions 0/128 dead transitions. [2021-03-24 22:16:35,802 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 128 transitions, 4479 flow [2021-03-24 22:16:35,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:16:35,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:16:35,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 764 transitions. [2021-03-24 22:16:35,803 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9909208819714657 [2021-03-24 22:16:35,803 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 764 transitions. [2021-03-24 22:16:35,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 764 transitions. [2021-03-24 22:16:35,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:16:35,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 764 transitions. [2021-03-24 22:16:35,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 254.66666666666666) internal successors, (764), 3 states have internal predecessors, (764), 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) [2021-03-24 22:16:35,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 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) [2021-03-24 22:16:35,804 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 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) [2021-03-24 22:16:35,804 INFO L185 Difference]: Start difference. First operand has 256 places, 129 transitions, 4479 flow. Second operand 3 states and 764 transitions. [2021-03-24 22:16:35,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 128 transitions, 4479 flow [2021-03-24 22:16:35,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 128 transitions, 573 flow, removed 1953 selfloop flow, removed 0 redundant places. [2021-03-24 22:16:35,883 INFO L241 Difference]: Finished difference. Result has 257 places, 128 transitions, 573 flow [2021-03-24 22:16:35,883 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=571, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=573, PETRI_PLACES=257, PETRI_TRANSITIONS=128} [2021-03-24 22:16:35,883 INFO L343 CegarLoopForPetriNet]: 256 programPoint places, 1 predicate places. [2021-03-24 22:16:35,883 INFO L480 AbstractCegarLoop]: Abstraction has has 257 places, 128 transitions, 573 flow [2021-03-24 22:16:35,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 254.66666666666666) internal successors, (764), 3 states have internal predecessors, (764), 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) [2021-03-24 22:16:35,884 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:16:35,884 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:16:35,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2021-03-24 22:16:35,884 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:16:35,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:16:35,884 INFO L82 PathProgramCache]: Analyzing trace with hash -2027780994, now seen corresponding path program 1 times [2021-03-24 22:16:35,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:16:35,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907936320] [2021-03-24 22:16:35,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:16:35,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:16:35,895 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:16:35,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:16:35,897 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:16:35,907 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:16:35,907 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:16:35,907 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2021-03-24 22:16:35,907 WARN L342 ceAbstractionStarter]: 63 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:16:35,907 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 64 thread instances. [2021-03-24 22:16:35,979 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:16:35,979 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:16:35,980 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:16:35,980 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:16:35,980 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:16:35,980 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:16:35,980 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:16:35,980 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:16:35,980 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:16:35,980 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:16:35,982 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 326 places, 197 transitions, 4746 flow [2021-03-24 22:16:36,036 INFO L129 PetriNetUnfolder]: 0/389 cut-off events. [2021-03-24 22:16:36,036 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:16:36,036 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2662 conditions, 389 events. 0/389 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1407 event pairs, 0 based on Foata normal form. 0/324 useless extension candidates. Maximal degree in co-relation 0. Up to 65 conditions per place. [2021-03-24 22:16:36,036 INFO L82 GeneralOperation]: Start removeDead. Operand has 326 places, 197 transitions, 4746 flow [2021-03-24 22:16:36,038 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 324 places, 195 transitions, 4742 flow [2021-03-24 22:16:36,038 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:16:36,038 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 324 places, 195 transitions, 4742 flow [2021-03-24 22:16:36,038 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 324 places, 195 transitions, 4742 flow [2021-03-24 22:16:36,040 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 324 places, 195 transitions, 4742 flow [2021-03-24 22:16:36,082 INFO L129 PetriNetUnfolder]: 0/259 cut-off events. [2021-03-24 22:16:36,082 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:16:36,082 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2532 conditions, 259 events. 0/259 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 701 event pairs, 0 based on Foata normal form. 0/259 useless extension candidates. Maximal degree in co-relation 0. Up to 65 conditions per place. [2021-03-24 22:16:36,097 INFO L142 LiptonReduction]: Number of co-enabled transitions 24704 [2021-03-24 22:16:42,380 INFO L154 LiptonReduction]: Checked pairs total: 10208 [2021-03-24 22:16:42,380 INFO L156 LiptonReduction]: Total number of compositions: 64 [2021-03-24 22:16:42,380 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 6342 [2021-03-24 22:16:42,381 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:16:42,381 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:16:42,381 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:16:42,381 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:16:42,381 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:16:42,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:16:42,381 INFO L82 PathProgramCache]: Analyzing trace with hash 275491, now seen corresponding path program 1 times [2021-03-24 22:16:42,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:16:42,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437396826] [2021-03-24 22:16:42,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:16:42,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:16:42,394 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:16:42,394 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:16:42,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:16:42,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437396826] [2021-03-24 22:16:42,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:16:42,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:16:42,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907550382] [2021-03-24 22:16:42,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:16:42,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:16:42,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:16:42,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:16:42,398 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 261 [2021-03-24 22:16:42,398 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 131 transitions, 4614 flow. Second operand has 3 states, 3 states have (on average 258.6666666666667) internal successors, (776), 3 states have internal predecessors, (776), 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) [2021-03-24 22:16:42,398 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:16:42,398 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 261 [2021-03-24 22:16:42,398 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:16:42,428 INFO L129 PetriNetUnfolder]: 0/130 cut-off events. [2021-03-24 22:16:42,428 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:16:42,428 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2405 conditions, 130 events. 0/130 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 150 event pairs, 0 based on Foata normal form. 65/195 useless extension candidates. Maximal degree in co-relation 0. Up to 65 conditions per place. [2021-03-24 22:16:42,429 INFO L132 encePairwiseOnDemand]: 259/261 looper letters, 0 selfloop transitions, 1 changer transitions 0/130 dead transitions. [2021-03-24 22:16:42,429 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 130 transitions, 4614 flow [2021-03-24 22:16:42,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:16:42,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:16:42,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 776 transitions. [2021-03-24 22:16:42,430 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9910600255427842 [2021-03-24 22:16:42,430 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 776 transitions. [2021-03-24 22:16:42,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 776 transitions. [2021-03-24 22:16:42,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:16:42,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 776 transitions. [2021-03-24 22:16:42,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 258.6666666666667) internal successors, (776), 3 states have internal predecessors, (776), 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) [2021-03-24 22:16:42,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 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) [2021-03-24 22:16:42,432 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 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) [2021-03-24 22:16:42,432 INFO L185 Difference]: Start difference. First operand has 260 places, 131 transitions, 4614 flow. Second operand 3 states and 776 transitions. [2021-03-24 22:16:42,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 130 transitions, 4614 flow [2021-03-24 22:16:42,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 130 transitions, 582 flow, removed 2016 selfloop flow, removed 0 redundant places. [2021-03-24 22:16:42,519 INFO L241 Difference]: Finished difference. Result has 261 places, 130 transitions, 582 flow [2021-03-24 22:16:42,519 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=582, PETRI_PLACES=261, PETRI_TRANSITIONS=130} [2021-03-24 22:16:42,519 INFO L343 CegarLoopForPetriNet]: 260 programPoint places, 1 predicate places. [2021-03-24 22:16:42,519 INFO L480 AbstractCegarLoop]: Abstraction has has 261 places, 130 transitions, 582 flow [2021-03-24 22:16:42,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 258.6666666666667) internal successors, (776), 3 states have internal predecessors, (776), 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) [2021-03-24 22:16:42,519 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:16:42,519 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:16:42,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2021-03-24 22:16:42,520 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:16:42,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:16:42,520 INFO L82 PathProgramCache]: Analyzing trace with hash -438281080, now seen corresponding path program 1 times [2021-03-24 22:16:42,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:16:42,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397062481] [2021-03-24 22:16:42,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:16:42,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:16:42,531 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:16:42,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:16:42,533 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:16:42,542 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:16:42,542 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:16:42,542 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2021-03-24 22:16:42,542 WARN L342 ceAbstractionStarter]: 64 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:16:42,543 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 65 thread instances. [2021-03-24 22:16:42,606 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:16:42,606 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:16:42,606 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:16:42,606 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:16:42,606 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:16:42,606 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:16:42,607 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:16:42,607 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:16:42,607 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:16:42,607 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:16:42,609 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 331 places, 200 transitions, 4885 flow [2021-03-24 22:16:42,674 INFO L129 PetriNetUnfolder]: 0/395 cut-off events. [2021-03-24 22:16:42,674 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:16:42,674 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2736 conditions, 395 events. 0/395 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1471 event pairs, 0 based on Foata normal form. 0/329 useless extension candidates. Maximal degree in co-relation 0. Up to 66 conditions per place. [2021-03-24 22:16:42,674 INFO L82 GeneralOperation]: Start removeDead. Operand has 331 places, 200 transitions, 4885 flow [2021-03-24 22:16:42,675 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 329 places, 198 transitions, 4881 flow [2021-03-24 22:16:42,676 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:16:42,676 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 329 places, 198 transitions, 4881 flow [2021-03-24 22:16:42,676 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 329 places, 198 transitions, 4881 flow [2021-03-24 22:16:42,677 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 329 places, 198 transitions, 4881 flow [2021-03-24 22:16:42,721 INFO L129 PetriNetUnfolder]: 0/263 cut-off events. [2021-03-24 22:16:42,721 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:16:42,721 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2604 conditions, 263 events. 0/263 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 735 event pairs, 0 based on Foata normal form. 0/263 useless extension candidates. Maximal degree in co-relation 0. Up to 66 conditions per place. [2021-03-24 22:16:42,736 INFO L142 LiptonReduction]: Number of co-enabled transitions 25480 [2021-03-24 22:16:49,283 INFO L154 LiptonReduction]: Checked pairs total: 10530 [2021-03-24 22:16:49,283 INFO L156 LiptonReduction]: Total number of compositions: 65 [2021-03-24 22:16:49,283 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 6607 [2021-03-24 22:16:49,284 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:16:49,284 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:16:49,284 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:16:49,284 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:16:49,284 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:16:49,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:16:49,284 INFO L82 PathProgramCache]: Analyzing trace with hash 283939, now seen corresponding path program 1 times [2021-03-24 22:16:49,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:16:49,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075891871] [2021-03-24 22:16:49,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:16:49,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:16:49,296 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:16:49,297 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:16:49,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:16:49,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075891871] [2021-03-24 22:16:49,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:16:49,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:16:49,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877343703] [2021-03-24 22:16:49,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:16:49,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:16:49,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:16:49,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:16:49,300 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 265 [2021-03-24 22:16:49,301 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 133 transitions, 4751 flow. Second operand has 3 states, 3 states have (on average 262.6666666666667) internal successors, (788), 3 states have internal predecessors, (788), 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) [2021-03-24 22:16:49,301 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:16:49,301 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 265 [2021-03-24 22:16:49,301 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:16:49,332 INFO L129 PetriNetUnfolder]: 0/132 cut-off events. [2021-03-24 22:16:49,332 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:16:49,332 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2475 conditions, 132 events. 0/132 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 127 event pairs, 0 based on Foata normal form. 66/198 useless extension candidates. Maximal degree in co-relation 0. Up to 66 conditions per place. [2021-03-24 22:16:49,332 INFO L132 encePairwiseOnDemand]: 263/265 looper letters, 0 selfloop transitions, 1 changer transitions 0/132 dead transitions. [2021-03-24 22:16:49,332 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 132 transitions, 4751 flow [2021-03-24 22:16:49,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:16:49,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:16:49,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 788 transitions. [2021-03-24 22:16:49,333 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9911949685534591 [2021-03-24 22:16:49,333 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 788 transitions. [2021-03-24 22:16:49,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 788 transitions. [2021-03-24 22:16:49,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:16:49,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 788 transitions. [2021-03-24 22:16:49,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 262.6666666666667) internal successors, (788), 3 states have internal predecessors, (788), 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) [2021-03-24 22:16:49,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 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) [2021-03-24 22:16:49,335 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 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) [2021-03-24 22:16:49,335 INFO L185 Difference]: Start difference. First operand has 264 places, 133 transitions, 4751 flow. Second operand 3 states and 788 transitions. [2021-03-24 22:16:49,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 132 transitions, 4751 flow [2021-03-24 22:16:49,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 132 transitions, 591 flow, removed 2080 selfloop flow, removed 0 redundant places. [2021-03-24 22:16:49,424 INFO L241 Difference]: Finished difference. Result has 265 places, 132 transitions, 591 flow [2021-03-24 22:16:49,425 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=589, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=591, PETRI_PLACES=265, PETRI_TRANSITIONS=132} [2021-03-24 22:16:49,425 INFO L343 CegarLoopForPetriNet]: 264 programPoint places, 1 predicate places. [2021-03-24 22:16:49,425 INFO L480 AbstractCegarLoop]: Abstraction has has 265 places, 132 transitions, 591 flow [2021-03-24 22:16:49,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 262.6666666666667) internal successors, (788), 3 states have internal predecessors, (788), 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) [2021-03-24 22:16:49,425 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:16:49,425 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:16:49,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2021-03-24 22:16:49,425 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:16:49,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:16:49,426 INFO L82 PathProgramCache]: Analyzing trace with hash 19023529, now seen corresponding path program 1 times [2021-03-24 22:16:49,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:16:49,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127166558] [2021-03-24 22:16:49,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:16:49,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:16:49,439 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:16:49,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:16:49,441 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:16:49,451 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:16:49,451 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:16:49,451 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2021-03-24 22:16:49,451 WARN L342 ceAbstractionStarter]: 65 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:16:49,451 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 66 thread instances. [2021-03-24 22:16:49,512 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:16:49,512 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:16:49,512 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:16:49,512 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:16:49,512 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:16:49,512 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:16:49,512 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:16:49,512 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:16:49,512 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:16:49,512 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:16:49,515 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 336 places, 203 transitions, 5026 flow [2021-03-24 22:16:49,573 INFO L129 PetriNetUnfolder]: 0/401 cut-off events. [2021-03-24 22:16:49,573 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:16:49,573 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2811 conditions, 401 events. 0/401 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1541 event pairs, 0 based on Foata normal form. 0/334 useless extension candidates. Maximal degree in co-relation 0. Up to 67 conditions per place. [2021-03-24 22:16:49,573 INFO L82 GeneralOperation]: Start removeDead. Operand has 336 places, 203 transitions, 5026 flow [2021-03-24 22:16:49,575 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 334 places, 201 transitions, 5022 flow [2021-03-24 22:16:49,575 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:16:49,575 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 334 places, 201 transitions, 5022 flow [2021-03-24 22:16:49,575 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 334 places, 201 transitions, 5022 flow [2021-03-24 22:16:49,576 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 334 places, 201 transitions, 5022 flow [2021-03-24 22:16:49,622 INFO L129 PetriNetUnfolder]: 0/267 cut-off events. [2021-03-24 22:16:49,622 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:16:49,622 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2677 conditions, 267 events. 0/267 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 846 event pairs, 0 based on Foata normal form. 0/267 useless extension candidates. Maximal degree in co-relation 0. Up to 67 conditions per place. [2021-03-24 22:16:49,638 INFO L142 LiptonReduction]: Number of co-enabled transitions 26268 [2021-03-24 22:16:56,902 INFO L154 LiptonReduction]: Checked pairs total: 10857 [2021-03-24 22:16:56,902 INFO L156 LiptonReduction]: Total number of compositions: 66 [2021-03-24 22:16:56,903 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 7328 [2021-03-24 22:16:56,903 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:16:56,903 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:16:56,903 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:16:56,904 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:16:56,904 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:16:56,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:16:56,904 INFO L82 PathProgramCache]: Analyzing trace with hash 292515, now seen corresponding path program 1 times [2021-03-24 22:16:56,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:16:56,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105405803] [2021-03-24 22:16:56,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:16:56,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:16:56,915 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:16:56,915 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:16:56,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:16:56,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105405803] [2021-03-24 22:16:56,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:16:56,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:16:56,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509926318] [2021-03-24 22:16:56,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:16:56,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:16:56,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:16:56,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:16:56,919 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 269 [2021-03-24 22:16:56,919 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 135 transitions, 4890 flow. Second operand has 3 states, 3 states have (on average 266.6666666666667) internal successors, (800), 3 states have internal predecessors, (800), 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) [2021-03-24 22:16:56,919 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:16:56,919 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 269 [2021-03-24 22:16:56,919 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:16:56,952 INFO L129 PetriNetUnfolder]: 0/134 cut-off events. [2021-03-24 22:16:56,952 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:16:56,952 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2546 conditions, 134 events. 0/134 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 146 event pairs, 0 based on Foata normal form. 67/201 useless extension candidates. Maximal degree in co-relation 0. Up to 67 conditions per place. [2021-03-24 22:16:56,952 INFO L132 encePairwiseOnDemand]: 267/269 looper letters, 0 selfloop transitions, 1 changer transitions 0/134 dead transitions. [2021-03-24 22:16:56,952 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 134 transitions, 4890 flow [2021-03-24 22:16:56,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:16:56,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:16:56,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 800 transitions. [2021-03-24 22:16:56,953 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9913258983890955 [2021-03-24 22:16:56,953 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 800 transitions. [2021-03-24 22:16:56,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 800 transitions. [2021-03-24 22:16:56,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:16:56,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 800 transitions. [2021-03-24 22:16:56,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 266.6666666666667) internal successors, (800), 3 states have internal predecessors, (800), 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) [2021-03-24 22:16:56,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 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) [2021-03-24 22:16:56,954 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 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) [2021-03-24 22:16:56,955 INFO L185 Difference]: Start difference. First operand has 268 places, 135 transitions, 4890 flow. Second operand 3 states and 800 transitions. [2021-03-24 22:16:56,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 134 transitions, 4890 flow [2021-03-24 22:16:57,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 134 transitions, 600 flow, removed 2145 selfloop flow, removed 0 redundant places. [2021-03-24 22:16:57,047 INFO L241 Difference]: Finished difference. Result has 269 places, 134 transitions, 600 flow [2021-03-24 22:16:57,048 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=598, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=600, PETRI_PLACES=269, PETRI_TRANSITIONS=134} [2021-03-24 22:16:57,048 INFO L343 CegarLoopForPetriNet]: 268 programPoint places, 1 predicate places. [2021-03-24 22:16:57,048 INFO L480 AbstractCegarLoop]: Abstraction has has 269 places, 134 transitions, 600 flow [2021-03-24 22:16:57,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 266.6666666666667) internal successors, (800), 3 states have internal predecessors, (800), 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) [2021-03-24 22:16:57,048 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:16:57,048 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:16:57,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2021-03-24 22:16:57,048 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:16:57,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:16:57,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1713949771, now seen corresponding path program 1 times [2021-03-24 22:16:57,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:16:57,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585414009] [2021-03-24 22:16:57,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:16:57,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:16:57,060 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:16:57,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:16:57,062 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:16:57,071 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:16:57,071 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:16:57,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2021-03-24 22:16:57,072 WARN L342 ceAbstractionStarter]: 66 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:16:57,072 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 67 thread instances. [2021-03-24 22:16:57,131 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:16:57,131 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:16:57,131 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:16:57,131 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:16:57,131 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:16:57,131 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:16:57,131 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:16:57,131 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:16:57,131 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:16:57,131 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:16:57,133 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 341 places, 206 transitions, 5169 flow [2021-03-24 22:16:57,192 INFO L129 PetriNetUnfolder]: 0/407 cut-off events. [2021-03-24 22:16:57,192 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:16:57,192 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2887 conditions, 407 events. 0/407 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1498 event pairs, 0 based on Foata normal form. 0/339 useless extension candidates. Maximal degree in co-relation 0. Up to 68 conditions per place. [2021-03-24 22:16:57,192 INFO L82 GeneralOperation]: Start removeDead. Operand has 341 places, 206 transitions, 5169 flow [2021-03-24 22:16:57,194 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 339 places, 204 transitions, 5165 flow [2021-03-24 22:16:57,194 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:16:57,194 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 339 places, 204 transitions, 5165 flow [2021-03-24 22:16:57,194 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 339 places, 204 transitions, 5165 flow [2021-03-24 22:16:57,195 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 339 places, 204 transitions, 5165 flow [2021-03-24 22:16:57,243 INFO L129 PetriNetUnfolder]: 0/271 cut-off events. [2021-03-24 22:16:57,243 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:16:57,243 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2751 conditions, 271 events. 0/271 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 848 event pairs, 0 based on Foata normal form. 0/271 useless extension candidates. Maximal degree in co-relation 0. Up to 68 conditions per place. [2021-03-24 22:16:57,261 INFO L142 LiptonReduction]: Number of co-enabled transitions 27068 [2021-03-24 22:17:01,439 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-03-24 22:17:04,626 INFO L154 LiptonReduction]: Checked pairs total: 11189 [2021-03-24 22:17:04,626 INFO L156 LiptonReduction]: Total number of compositions: 67 [2021-03-24 22:17:04,626 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 7432 [2021-03-24 22:17:04,627 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:17:04,627 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:17:04,627 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:17:04,627 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:17:04,627 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:17:04,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:17:04,627 INFO L82 PathProgramCache]: Analyzing trace with hash 301219, now seen corresponding path program 1 times [2021-03-24 22:17:04,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:17:04,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486583574] [2021-03-24 22:17:04,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:17:04,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:17:04,639 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:17:04,640 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:17:04,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:17:04,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486583574] [2021-03-24 22:17:04,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:17:04,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:17:04,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491077130] [2021-03-24 22:17:04,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:17:04,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:17:04,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:17:04,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:17:04,643 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 270 out of 273 [2021-03-24 22:17:04,644 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 137 transitions, 5031 flow. Second operand has 3 states, 3 states have (on average 270.6666666666667) internal successors, (812), 3 states have internal predecessors, (812), 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) [2021-03-24 22:17:04,644 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:17:04,644 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 270 of 273 [2021-03-24 22:17:04,644 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:17:04,677 INFO L129 PetriNetUnfolder]: 0/136 cut-off events. [2021-03-24 22:17:04,678 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:17:04,678 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2618 conditions, 136 events. 0/136 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 131 event pairs, 0 based on Foata normal form. 68/204 useless extension candidates. Maximal degree in co-relation 0. Up to 68 conditions per place. [2021-03-24 22:17:04,678 INFO L132 encePairwiseOnDemand]: 271/273 looper letters, 0 selfloop transitions, 1 changer transitions 0/136 dead transitions. [2021-03-24 22:17:04,678 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 136 transitions, 5031 flow [2021-03-24 22:17:04,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:17:04,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:17:04,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 812 transitions. [2021-03-24 22:17:04,679 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9914529914529915 [2021-03-24 22:17:04,679 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 812 transitions. [2021-03-24 22:17:04,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 812 transitions. [2021-03-24 22:17:04,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:17:04,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 812 transitions. [2021-03-24 22:17:04,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 270.6666666666667) internal successors, (812), 3 states have internal predecessors, (812), 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) [2021-03-24 22:17:04,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 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) [2021-03-24 22:17:04,681 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 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) [2021-03-24 22:17:04,681 INFO L185 Difference]: Start difference. First operand has 272 places, 137 transitions, 5031 flow. Second operand 3 states and 812 transitions. [2021-03-24 22:17:04,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 136 transitions, 5031 flow [2021-03-24 22:17:04,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 136 transitions, 609 flow, removed 2211 selfloop flow, removed 0 redundant places. [2021-03-24 22:17:04,792 INFO L241 Difference]: Finished difference. Result has 273 places, 136 transitions, 609 flow [2021-03-24 22:17:04,792 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=607, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=609, PETRI_PLACES=273, PETRI_TRANSITIONS=136} [2021-03-24 22:17:04,792 INFO L343 CegarLoopForPetriNet]: 272 programPoint places, 1 predicate places. [2021-03-24 22:17:04,792 INFO L480 AbstractCegarLoop]: Abstraction has has 273 places, 136 transitions, 609 flow [2021-03-24 22:17:04,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 270.6666666666667) internal successors, (812), 3 states have internal predecessors, (812), 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) [2021-03-24 22:17:04,793 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:17:04,793 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:17:04,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2021-03-24 22:17:04,793 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:17:04,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:17:04,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1351835364, now seen corresponding path program 1 times [2021-03-24 22:17:04,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:17:04,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008215798] [2021-03-24 22:17:04,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:17:04,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:17:04,805 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:17:04,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:17:04,808 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:17:04,819 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:17:04,819 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:17:04,819 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2021-03-24 22:17:04,819 WARN L342 ceAbstractionStarter]: 67 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:17:04,820 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 68 thread instances. [2021-03-24 22:17:04,893 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:17:04,894 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:17:04,894 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:17:04,894 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:17:04,894 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:17:04,894 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:17:04,894 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:17:04,894 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:17:04,894 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:17:04,894 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:17:04,896 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 346 places, 209 transitions, 5314 flow [2021-03-24 22:17:04,987 INFO L129 PetriNetUnfolder]: 0/413 cut-off events. [2021-03-24 22:17:04,987 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:17:04,987 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2964 conditions, 413 events. 0/413 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1504 event pairs, 0 based on Foata normal form. 0/344 useless extension candidates. Maximal degree in co-relation 0. Up to 69 conditions per place. [2021-03-24 22:17:04,987 INFO L82 GeneralOperation]: Start removeDead. Operand has 346 places, 209 transitions, 5314 flow [2021-03-24 22:17:04,990 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 344 places, 207 transitions, 5310 flow [2021-03-24 22:17:04,990 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:17:04,990 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 344 places, 207 transitions, 5310 flow [2021-03-24 22:17:04,990 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 344 places, 207 transitions, 5310 flow [2021-03-24 22:17:04,992 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 344 places, 207 transitions, 5310 flow [2021-03-24 22:17:05,048 INFO L129 PetriNetUnfolder]: 0/275 cut-off events. [2021-03-24 22:17:05,049 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:17:05,049 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2826 conditions, 275 events. 0/275 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 868 event pairs, 0 based on Foata normal form. 0/275 useless extension candidates. Maximal degree in co-relation 0. Up to 69 conditions per place. [2021-03-24 22:17:05,067 INFO L142 LiptonReduction]: Number of co-enabled transitions 27880 [2021-03-24 22:17:12,992 INFO L154 LiptonReduction]: Checked pairs total: 11526 [2021-03-24 22:17:12,993 INFO L156 LiptonReduction]: Total number of compositions: 68 [2021-03-24 22:17:12,993 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 8003 [2021-03-24 22:17:12,994 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:17:12,994 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:17:12,994 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:17:12,994 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:17:12,994 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:17:12,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:17:12,994 INFO L82 PathProgramCache]: Analyzing trace with hash 310051, now seen corresponding path program 1 times [2021-03-24 22:17:12,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:17:12,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823925097] [2021-03-24 22:17:12,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:17:13,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:17:13,007 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:17:13,008 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:17:13,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:17:13,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823925097] [2021-03-24 22:17:13,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:17:13,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:17:13,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738335333] [2021-03-24 22:17:13,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:17:13,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:17:13,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:17:13,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:17:13,012 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 277 [2021-03-24 22:17:13,012 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 139 transitions, 5174 flow. Second operand has 3 states, 3 states have (on average 274.6666666666667) internal successors, (824), 3 states have internal predecessors, (824), 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) [2021-03-24 22:17:13,012 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:17:13,012 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 277 [2021-03-24 22:17:13,012 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:17:13,046 INFO L129 PetriNetUnfolder]: 0/138 cut-off events. [2021-03-24 22:17:13,047 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:17:13,047 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2691 conditions, 138 events. 0/138 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 172 event pairs, 0 based on Foata normal form. 69/207 useless extension candidates. Maximal degree in co-relation 0. Up to 69 conditions per place. [2021-03-24 22:17:13,047 INFO L132 encePairwiseOnDemand]: 275/277 looper letters, 0 selfloop transitions, 1 changer transitions 0/138 dead transitions. [2021-03-24 22:17:13,047 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 138 transitions, 5174 flow [2021-03-24 22:17:13,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:17:13,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:17:13,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 824 transitions. [2021-03-24 22:17:13,048 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9915764139590855 [2021-03-24 22:17:13,048 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 824 transitions. [2021-03-24 22:17:13,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 824 transitions. [2021-03-24 22:17:13,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:17:13,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 824 transitions. [2021-03-24 22:17:13,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 274.6666666666667) internal successors, (824), 3 states have internal predecessors, (824), 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) [2021-03-24 22:17:13,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 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) [2021-03-24 22:17:13,049 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 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) [2021-03-24 22:17:13,049 INFO L185 Difference]: Start difference. First operand has 276 places, 139 transitions, 5174 flow. Second operand 3 states and 824 transitions. [2021-03-24 22:17:13,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 138 transitions, 5174 flow [2021-03-24 22:17:13,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 138 transitions, 618 flow, removed 2278 selfloop flow, removed 0 redundant places. [2021-03-24 22:17:13,139 INFO L241 Difference]: Finished difference. Result has 277 places, 138 transitions, 618 flow [2021-03-24 22:17:13,139 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=616, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=618, PETRI_PLACES=277, PETRI_TRANSITIONS=138} [2021-03-24 22:17:13,139 INFO L343 CegarLoopForPetriNet]: 276 programPoint places, 1 predicate places. [2021-03-24 22:17:13,139 INFO L480 AbstractCegarLoop]: Abstraction has has 277 places, 138 transitions, 618 flow [2021-03-24 22:17:13,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 274.6666666666667) internal successors, (824), 3 states have internal predecessors, (824), 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) [2021-03-24 22:17:13,140 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:17:13,140 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:17:13,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2021-03-24 22:17:13,140 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:17:13,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:17:13,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1133995506, now seen corresponding path program 1 times [2021-03-24 22:17:13,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:17:13,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825964808] [2021-03-24 22:17:13,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:17:13,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:17:13,153 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:17:13,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:17:13,155 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:17:13,165 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:17:13,165 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:17:13,165 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2021-03-24 22:17:13,165 WARN L342 ceAbstractionStarter]: 68 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:17:13,165 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 69 thread instances. [2021-03-24 22:17:13,241 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:17:13,241 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:17:13,241 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:17:13,241 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:17:13,241 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:17:13,241 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:17:13,241 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:17:13,241 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:17:13,241 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:17:13,241 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:17:13,243 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 351 places, 212 transitions, 5461 flow [2021-03-24 22:17:13,306 INFO L129 PetriNetUnfolder]: 0/419 cut-off events. [2021-03-24 22:17:13,306 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:17:13,306 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3042 conditions, 419 events. 0/419 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1556 event pairs, 0 based on Foata normal form. 0/349 useless extension candidates. Maximal degree in co-relation 0. Up to 70 conditions per place. [2021-03-24 22:17:13,306 INFO L82 GeneralOperation]: Start removeDead. Operand has 351 places, 212 transitions, 5461 flow [2021-03-24 22:17:13,308 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 349 places, 210 transitions, 5457 flow [2021-03-24 22:17:13,308 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:17:13,308 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 349 places, 210 transitions, 5457 flow [2021-03-24 22:17:13,308 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 349 places, 210 transitions, 5457 flow [2021-03-24 22:17:13,309 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 349 places, 210 transitions, 5457 flow [2021-03-24 22:17:13,361 INFO L129 PetriNetUnfolder]: 0/279 cut-off events. [2021-03-24 22:17:13,361 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:17:13,361 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2902 conditions, 279 events. 0/279 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 751 event pairs, 0 based on Foata normal form. 0/279 useless extension candidates. Maximal degree in co-relation 0. Up to 70 conditions per place. [2021-03-24 22:17:13,380 INFO L142 LiptonReduction]: Number of co-enabled transitions 28704 [2021-03-24 22:17:21,743 INFO L154 LiptonReduction]: Checked pairs total: 11868 [2021-03-24 22:17:21,744 INFO L156 LiptonReduction]: Total number of compositions: 69 [2021-03-24 22:17:21,744 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 8436 [2021-03-24 22:17:21,744 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-03-24 22:17:21,744 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:17:21,744 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:17:21,744 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:17:21,745 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:17:21,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:17:21,745 INFO L82 PathProgramCache]: Analyzing trace with hash 319011, now seen corresponding path program 1 times [2021-03-24 22:17:21,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:17:21,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87549333] [2021-03-24 22:17:21,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:17:21,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:17:21,758 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:17:21,758 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:17:21,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:17:21,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87549333] [2021-03-24 22:17:21,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:17:21,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:17:21,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32885233] [2021-03-24 22:17:21,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:17:21,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:17:21,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:17:21,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:17:21,762 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 281 [2021-03-24 22:17:21,763 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 141 transitions, 5319 flow. Second operand has 3 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 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) [2021-03-24 22:17:21,763 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:17:21,763 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 281 [2021-03-24 22:17:21,763 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:17:21,798 INFO L129 PetriNetUnfolder]: 0/140 cut-off events. [2021-03-24 22:17:21,799 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:17:21,799 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2765 conditions, 140 events. 0/140 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 157 event pairs, 0 based on Foata normal form. 70/210 useless extension candidates. Maximal degree in co-relation 0. Up to 70 conditions per place. [2021-03-24 22:17:21,799 INFO L132 encePairwiseOnDemand]: 279/281 looper letters, 0 selfloop transitions, 1 changer transitions 0/140 dead transitions. [2021-03-24 22:17:21,799 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 140 transitions, 5319 flow [2021-03-24 22:17:21,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:17:21,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:17:21,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 836 transitions. [2021-03-24 22:17:21,800 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9916963226571768 [2021-03-24 22:17:21,800 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 836 transitions. [2021-03-24 22:17:21,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 836 transitions. [2021-03-24 22:17:21,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:17:21,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 836 transitions. [2021-03-24 22:17:21,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 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) [2021-03-24 22:17:21,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 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) [2021-03-24 22:17:21,801 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 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) [2021-03-24 22:17:21,801 INFO L185 Difference]: Start difference. First operand has 280 places, 141 transitions, 5319 flow. Second operand 3 states and 836 transitions. [2021-03-24 22:17:21,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 140 transitions, 5319 flow [2021-03-24 22:17:21,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 140 transitions, 627 flow, removed 2346 selfloop flow, removed 0 redundant places. [2021-03-24 22:17:21,893 INFO L241 Difference]: Finished difference. Result has 281 places, 140 transitions, 627 flow [2021-03-24 22:17:21,894 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=625, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=627, PETRI_PLACES=281, PETRI_TRANSITIONS=140} [2021-03-24 22:17:21,894 INFO L343 CegarLoopForPetriNet]: 280 programPoint places, 1 predicate places. [2021-03-24 22:17:21,894 INFO L480 AbstractCegarLoop]: Abstraction has has 281 places, 140 transitions, 627 flow [2021-03-24 22:17:21,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 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) [2021-03-24 22:17:21,894 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:17:21,894 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:17:21,894 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2021-03-24 22:17:21,894 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:17:21,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:17:21,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1823164207, now seen corresponding path program 1 times [2021-03-24 22:17:21,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:17:21,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548833581] [2021-03-24 22:17:21,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:17:21,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:17:21,907 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:17:21,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:17:21,910 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:17:21,920 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:17:21,920 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:17:21,921 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2021-03-24 22:17:21,921 WARN L342 ceAbstractionStarter]: 69 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:17:21,921 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 70 thread instances. [2021-03-24 22:17:21,991 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:17:21,991 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:17:21,992 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:17:21,992 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:17:21,992 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:17:21,992 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:17:21,992 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:17:21,992 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:17:21,992 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:17:21,992 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:17:21,994 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 356 places, 215 transitions, 5610 flow [2021-03-24 22:17:22,232 INFO L129 PetriNetUnfolder]: 0/425 cut-off events. [2021-03-24 22:17:22,233 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:17:22,233 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3121 conditions, 425 events. 0/425 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1578 event pairs, 0 based on Foata normal form. 0/354 useless extension candidates. Maximal degree in co-relation 0. Up to 71 conditions per place. [2021-03-24 22:17:22,233 INFO L82 GeneralOperation]: Start removeDead. Operand has 356 places, 215 transitions, 5610 flow [2021-03-24 22:17:22,235 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 354 places, 213 transitions, 5606 flow [2021-03-24 22:17:22,235 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:17:22,235 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 354 places, 213 transitions, 5606 flow [2021-03-24 22:17:22,235 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 354 places, 213 transitions, 5606 flow [2021-03-24 22:17:22,236 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 354 places, 213 transitions, 5606 flow [2021-03-24 22:17:22,291 INFO L129 PetriNetUnfolder]: 0/283 cut-off events. [2021-03-24 22:17:22,291 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:17:22,291 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2979 conditions, 283 events. 0/283 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 795 event pairs, 0 based on Foata normal form. 0/283 useless extension candidates. Maximal degree in co-relation 0. Up to 71 conditions per place. [2021-03-24 22:17:22,310 INFO L142 LiptonReduction]: Number of co-enabled transitions 29540 [2021-03-24 22:17:31,108 INFO L154 LiptonReduction]: Checked pairs total: 12215 [2021-03-24 22:17:31,108 INFO L156 LiptonReduction]: Total number of compositions: 70 [2021-03-24 22:17:31,108 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 8873 [2021-03-24 22:17:31,109 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-03-24 22:17:31,109 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:17:31,109 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:17:31,109 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:17:31,109 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:17:31,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:17:31,109 INFO L82 PathProgramCache]: Analyzing trace with hash 328099, now seen corresponding path program 1 times [2021-03-24 22:17:31,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:17:31,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304674805] [2021-03-24 22:17:31,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:17:31,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:17:31,123 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:17:31,123 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:17:31,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:17:31,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304674805] [2021-03-24 22:17:31,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:17:31,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:17:31,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576091354] [2021-03-24 22:17:31,127 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:17:31,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:17:31,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:17:31,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:17:31,127 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 285 [2021-03-24 22:17:31,128 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 143 transitions, 5466 flow. Second operand has 3 states, 3 states have (on average 282.6666666666667) internal successors, (848), 3 states have internal predecessors, (848), 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) [2021-03-24 22:17:31,128 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:17:31,128 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 285 [2021-03-24 22:17:31,128 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:17:31,165 INFO L129 PetriNetUnfolder]: 0/142 cut-off events. [2021-03-24 22:17:31,165 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:17:31,165 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2840 conditions, 142 events. 0/142 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 152 event pairs, 0 based on Foata normal form. 71/213 useless extension candidates. Maximal degree in co-relation 0. Up to 71 conditions per place. [2021-03-24 22:17:31,165 INFO L132 encePairwiseOnDemand]: 283/285 looper letters, 0 selfloop transitions, 1 changer transitions 0/142 dead transitions. [2021-03-24 22:17:31,165 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 142 transitions, 5466 flow [2021-03-24 22:17:31,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:17:31,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:17:31,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 848 transitions. [2021-03-24 22:17:31,166 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.991812865497076 [2021-03-24 22:17:31,166 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 848 transitions. [2021-03-24 22:17:31,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 848 transitions. [2021-03-24 22:17:31,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:17:31,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 848 transitions. [2021-03-24 22:17:31,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 282.6666666666667) internal successors, (848), 3 states have internal predecessors, (848), 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) [2021-03-24 22:17:31,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 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) [2021-03-24 22:17:31,167 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 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) [2021-03-24 22:17:31,167 INFO L185 Difference]: Start difference. First operand has 284 places, 143 transitions, 5466 flow. Second operand 3 states and 848 transitions. [2021-03-24 22:17:31,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 142 transitions, 5466 flow [2021-03-24 22:17:31,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 142 transitions, 636 flow, removed 2415 selfloop flow, removed 0 redundant places. [2021-03-24 22:17:31,257 INFO L241 Difference]: Finished difference. Result has 285 places, 142 transitions, 636 flow [2021-03-24 22:17:31,258 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=634, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=636, PETRI_PLACES=285, PETRI_TRANSITIONS=142} [2021-03-24 22:17:31,258 INFO L343 CegarLoopForPetriNet]: 284 programPoint places, 1 predicate places. [2021-03-24 22:17:31,258 INFO L480 AbstractCegarLoop]: Abstraction has has 285 places, 142 transitions, 636 flow [2021-03-24 22:17:31,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 282.6666666666667) internal successors, (848), 3 states have internal predecessors, (848), 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) [2021-03-24 22:17:31,258 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:17:31,258 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:17:31,258 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2021-03-24 22:17:31,258 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:17:31,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:17:31,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1518914513, now seen corresponding path program 1 times [2021-03-24 22:17:31,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:17:31,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202324207] [2021-03-24 22:17:31,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:17:31,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:17:31,272 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:17:31,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:17:31,275 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:17:31,286 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:17:31,286 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:17:31,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2021-03-24 22:17:31,287 WARN L342 ceAbstractionStarter]: 70 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:17:31,287 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 71 thread instances. [2021-03-24 22:17:31,367 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:17:31,367 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:17:31,368 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:17:31,368 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:17:31,368 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:17:31,368 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:17:31,368 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:17:31,368 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:17:31,368 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:17:31,368 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:17:31,370 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 361 places, 218 transitions, 5761 flow [2021-03-24 22:17:31,445 INFO L129 PetriNetUnfolder]: 0/431 cut-off events. [2021-03-24 22:17:31,446 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:17:31,446 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3201 conditions, 431 events. 0/431 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1611 event pairs, 0 based on Foata normal form. 0/359 useless extension candidates. Maximal degree in co-relation 0. Up to 72 conditions per place. [2021-03-24 22:17:31,446 INFO L82 GeneralOperation]: Start removeDead. Operand has 361 places, 218 transitions, 5761 flow [2021-03-24 22:17:31,448 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 359 places, 216 transitions, 5757 flow [2021-03-24 22:17:31,448 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:17:31,448 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 359 places, 216 transitions, 5757 flow [2021-03-24 22:17:31,448 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 359 places, 216 transitions, 5757 flow [2021-03-24 22:17:31,449 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 359 places, 216 transitions, 5757 flow [2021-03-24 22:17:31,504 INFO L129 PetriNetUnfolder]: 0/287 cut-off events. [2021-03-24 22:17:31,504 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:17:31,504 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3057 conditions, 287 events. 0/287 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 824 event pairs, 0 based on Foata normal form. 0/287 useless extension candidates. Maximal degree in co-relation 0. Up to 72 conditions per place. [2021-03-24 22:17:31,524 INFO L142 LiptonReduction]: Number of co-enabled transitions 30388 [2021-03-24 22:17:40,682 INFO L154 LiptonReduction]: Checked pairs total: 12567 [2021-03-24 22:17:40,682 INFO L156 LiptonReduction]: Total number of compositions: 71 [2021-03-24 22:17:40,683 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 9235 [2021-03-24 22:17:40,683 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-03-24 22:17:40,683 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:17:40,683 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:17:40,683 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:17:40,683 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:17:40,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:17:40,684 INFO L82 PathProgramCache]: Analyzing trace with hash 337315, now seen corresponding path program 1 times [2021-03-24 22:17:40,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:17:40,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302408829] [2021-03-24 22:17:40,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:17:40,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:17:40,697 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:17:40,698 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:17:40,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:17:40,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302408829] [2021-03-24 22:17:40,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:17:40,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:17:40,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404499603] [2021-03-24 22:17:40,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:17:40,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:17:40,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:17:40,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:17:40,702 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 289 [2021-03-24 22:17:40,702 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 145 transitions, 5615 flow. Second operand has 3 states, 3 states have (on average 286.6666666666667) internal successors, (860), 3 states have internal predecessors, (860), 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) [2021-03-24 22:17:40,702 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:17:40,702 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 289 [2021-03-24 22:17:40,702 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:17:40,748 INFO L129 PetriNetUnfolder]: 0/144 cut-off events. [2021-03-24 22:17:40,748 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:17:40,748 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2916 conditions, 144 events. 0/144 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 135 event pairs, 0 based on Foata normal form. 72/216 useless extension candidates. Maximal degree in co-relation 0. Up to 72 conditions per place. [2021-03-24 22:17:40,748 INFO L132 encePairwiseOnDemand]: 287/289 looper letters, 0 selfloop transitions, 1 changer transitions 0/144 dead transitions. [2021-03-24 22:17:40,748 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 144 transitions, 5615 flow [2021-03-24 22:17:40,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:17:40,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:17:40,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 860 transitions. [2021-03-24 22:17:40,749 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9919261822376009 [2021-03-24 22:17:40,749 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 860 transitions. [2021-03-24 22:17:40,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 860 transitions. [2021-03-24 22:17:40,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:17:40,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 860 transitions. [2021-03-24 22:17:40,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 286.6666666666667) internal successors, (860), 3 states have internal predecessors, (860), 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) [2021-03-24 22:17:40,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 289.0) internal successors, (1156), 4 states have internal predecessors, (1156), 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) [2021-03-24 22:17:40,750 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 289.0) internal successors, (1156), 4 states have internal predecessors, (1156), 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) [2021-03-24 22:17:40,750 INFO L185 Difference]: Start difference. First operand has 288 places, 145 transitions, 5615 flow. Second operand 3 states and 860 transitions. [2021-03-24 22:17:40,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 144 transitions, 5615 flow [2021-03-24 22:17:40,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 144 transitions, 645 flow, removed 2485 selfloop flow, removed 0 redundant places. [2021-03-24 22:17:40,837 INFO L241 Difference]: Finished difference. Result has 289 places, 144 transitions, 645 flow [2021-03-24 22:17:40,837 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=289, PETRI_DIFFERENCE_MINUEND_FLOW=643, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=645, PETRI_PLACES=289, PETRI_TRANSITIONS=144} [2021-03-24 22:17:40,837 INFO L343 CegarLoopForPetriNet]: 288 programPoint places, 1 predicate places. [2021-03-24 22:17:40,837 INFO L480 AbstractCegarLoop]: Abstraction has has 289 places, 144 transitions, 645 flow [2021-03-24 22:17:40,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 286.6666666666667) internal successors, (860), 3 states have internal predecessors, (860), 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) [2021-03-24 22:17:40,838 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:17:40,838 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:17:40,838 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2021-03-24 22:17:40,838 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:17:40,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:17:40,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1746041226, now seen corresponding path program 1 times [2021-03-24 22:17:40,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:17:40,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236514172] [2021-03-24 22:17:40,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:17:40,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:17:40,851 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:17:40,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:17:40,853 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:17:40,865 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:17:40,865 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:17:40,865 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2021-03-24 22:17:40,865 WARN L342 ceAbstractionStarter]: 71 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:17:40,865 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 72 thread instances. [2021-03-24 22:17:40,950 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:17:40,951 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:17:40,951 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:17:40,951 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:17:40,951 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:17:40,951 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:17:40,951 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:17:40,951 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:17:40,951 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:17:40,951 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:17:40,954 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 366 places, 221 transitions, 5914 flow [2021-03-24 22:17:41,057 INFO L129 PetriNetUnfolder]: 0/437 cut-off events. [2021-03-24 22:17:41,057 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:17:41,058 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3282 conditions, 437 events. 0/437 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1586 event pairs, 0 based on Foata normal form. 0/364 useless extension candidates. Maximal degree in co-relation 0. Up to 73 conditions per place. [2021-03-24 22:17:41,058 INFO L82 GeneralOperation]: Start removeDead. Operand has 366 places, 221 transitions, 5914 flow [2021-03-24 22:17:41,060 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 364 places, 219 transitions, 5910 flow [2021-03-24 22:17:41,061 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:17:41,061 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 364 places, 219 transitions, 5910 flow [2021-03-24 22:17:41,061 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 364 places, 219 transitions, 5910 flow [2021-03-24 22:17:41,063 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 364 places, 219 transitions, 5910 flow [2021-03-24 22:17:41,132 INFO L129 PetriNetUnfolder]: 0/291 cut-off events. [2021-03-24 22:17:41,132 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:17:41,132 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3136 conditions, 291 events. 0/291 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 904 event pairs, 0 based on Foata normal form. 0/291 useless extension candidates. Maximal degree in co-relation 0. Up to 73 conditions per place. [2021-03-24 22:17:41,152 INFO L142 LiptonReduction]: Number of co-enabled transitions 31248 [2021-03-24 22:17:51,072 INFO L154 LiptonReduction]: Checked pairs total: 12924 [2021-03-24 22:17:51,072 INFO L156 LiptonReduction]: Total number of compositions: 72 [2021-03-24 22:17:51,072 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 10011 [2021-03-24 22:17:51,073 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:17:51,073 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:17:51,073 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:17:51,073 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:17:51,073 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:17:51,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:17:51,073 INFO L82 PathProgramCache]: Analyzing trace with hash 346659, now seen corresponding path program 1 times [2021-03-24 22:17:51,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:17:51,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27626109] [2021-03-24 22:17:51,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:17:51,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:17:51,086 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:17:51,088 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:17:51,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:17:51,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27626109] [2021-03-24 22:17:51,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:17:51,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:17:51,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137096169] [2021-03-24 22:17:51,092 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:17:51,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:17:51,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:17:51,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:17:51,092 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 293 [2021-03-24 22:17:51,093 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 147 transitions, 5766 flow. Second operand has 3 states, 3 states have (on average 290.6666666666667) internal successors, (872), 3 states have internal predecessors, (872), 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) [2021-03-24 22:17:51,093 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:17:51,093 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 293 [2021-03-24 22:17:51,093 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:17:51,150 INFO L129 PetriNetUnfolder]: 0/146 cut-off events. [2021-03-24 22:17:51,150 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:17:51,150 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2993 conditions, 146 events. 0/146 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 170 event pairs, 0 based on Foata normal form. 73/219 useless extension candidates. Maximal degree in co-relation 0. Up to 73 conditions per place. [2021-03-24 22:17:51,150 INFO L132 encePairwiseOnDemand]: 291/293 looper letters, 0 selfloop transitions, 1 changer transitions 0/146 dead transitions. [2021-03-24 22:17:51,150 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 146 transitions, 5766 flow [2021-03-24 22:17:51,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:17:51,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:17:51,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 872 transitions. [2021-03-24 22:17:51,151 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9920364050056882 [2021-03-24 22:17:51,152 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 872 transitions. [2021-03-24 22:17:51,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 872 transitions. [2021-03-24 22:17:51,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:17:51,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 872 transitions. [2021-03-24 22:17:51,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 290.6666666666667) internal successors, (872), 3 states have internal predecessors, (872), 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) [2021-03-24 22:17:51,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 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) [2021-03-24 22:17:51,154 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 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) [2021-03-24 22:17:51,154 INFO L185 Difference]: Start difference. First operand has 292 places, 147 transitions, 5766 flow. Second operand 3 states and 872 transitions. [2021-03-24 22:17:51,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 146 transitions, 5766 flow [2021-03-24 22:17:51,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 146 transitions, 654 flow, removed 2556 selfloop flow, removed 0 redundant places. [2021-03-24 22:17:51,264 INFO L241 Difference]: Finished difference. Result has 293 places, 146 transitions, 654 flow [2021-03-24 22:17:51,264 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=652, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=654, PETRI_PLACES=293, PETRI_TRANSITIONS=146} [2021-03-24 22:17:51,264 INFO L343 CegarLoopForPetriNet]: 292 programPoint places, 1 predicate places. [2021-03-24 22:17:51,264 INFO L480 AbstractCegarLoop]: Abstraction has has 293 places, 146 transitions, 654 flow [2021-03-24 22:17:51,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 290.6666666666667) internal successors, (872), 3 states have internal predecessors, (872), 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) [2021-03-24 22:17:51,265 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:17:51,265 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:17:51,265 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2021-03-24 22:17:51,265 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:17:51,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:17:51,265 INFO L82 PathProgramCache]: Analyzing trace with hash 748644244, now seen corresponding path program 1 times [2021-03-24 22:17:51,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:17:51,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402719030] [2021-03-24 22:17:51,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:17:51,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:17:51,281 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:17:51,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:17:51,284 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:17:51,296 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:17:51,296 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:17:51,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2021-03-24 22:17:51,296 WARN L342 ceAbstractionStarter]: 72 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:17:51,296 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 73 thread instances. [2021-03-24 22:17:51,384 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:17:51,384 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:17:51,385 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:17:51,385 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:17:51,385 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:17:51,385 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:17:51,385 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:17:51,385 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:17:51,385 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:17:51,385 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:17:51,387 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 371 places, 224 transitions, 6069 flow [2021-03-24 22:17:51,478 INFO L129 PetriNetUnfolder]: 0/443 cut-off events. [2021-03-24 22:17:51,478 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:17:51,478 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3364 conditions, 443 events. 0/443 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1668 event pairs, 0 based on Foata normal form. 0/369 useless extension candidates. Maximal degree in co-relation 0. Up to 74 conditions per place. [2021-03-24 22:17:51,478 INFO L82 GeneralOperation]: Start removeDead. Operand has 371 places, 224 transitions, 6069 flow [2021-03-24 22:17:51,480 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 369 places, 222 transitions, 6065 flow [2021-03-24 22:17:51,480 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:17:51,481 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 369 places, 222 transitions, 6065 flow [2021-03-24 22:17:51,481 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 369 places, 222 transitions, 6065 flow [2021-03-24 22:17:51,482 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 369 places, 222 transitions, 6065 flow [2021-03-24 22:17:51,544 INFO L129 PetriNetUnfolder]: 0/295 cut-off events. [2021-03-24 22:17:51,544 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:17:51,544 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3216 conditions, 295 events. 0/295 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 787 event pairs, 0 based on Foata normal form. 0/295 useless extension candidates. Maximal degree in co-relation 0. Up to 74 conditions per place. [2021-03-24 22:17:51,565 INFO L142 LiptonReduction]: Number of co-enabled transitions 32120 [2021-03-24 22:18:02,086 INFO L154 LiptonReduction]: Checked pairs total: 13286 [2021-03-24 22:18:02,086 INFO L156 LiptonReduction]: Total number of compositions: 73 [2021-03-24 22:18:02,086 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 10606 [2021-03-24 22:18:02,087 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-03-24 22:18:02,087 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:18:02,087 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:18:02,087 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:18:02,087 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:18:02,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:18:02,088 INFO L82 PathProgramCache]: Analyzing trace with hash 356131, now seen corresponding path program 1 times [2021-03-24 22:18:02,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:18:02,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89008981] [2021-03-24 22:18:02,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:18:02,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:18:02,103 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:18:02,104 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:18:02,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:18:02,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89008981] [2021-03-24 22:18:02,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:18:02,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:18:02,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258616916] [2021-03-24 22:18:02,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:18:02,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:18:02,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:18:02,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:18:02,108 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 294 out of 297 [2021-03-24 22:18:02,108 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 149 transitions, 5919 flow. Second operand has 3 states, 3 states have (on average 294.6666666666667) internal successors, (884), 3 states have internal predecessors, (884), 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) [2021-03-24 22:18:02,108 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:18:02,109 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 294 of 297 [2021-03-24 22:18:02,109 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:18:02,155 INFO L129 PetriNetUnfolder]: 0/148 cut-off events. [2021-03-24 22:18:02,155 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:18:02,155 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3071 conditions, 148 events. 0/148 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 141 event pairs, 0 based on Foata normal form. 74/222 useless extension candidates. Maximal degree in co-relation 0. Up to 74 conditions per place. [2021-03-24 22:18:02,155 INFO L132 encePairwiseOnDemand]: 295/297 looper letters, 0 selfloop transitions, 1 changer transitions 0/148 dead transitions. [2021-03-24 22:18:02,155 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 148 transitions, 5919 flow [2021-03-24 22:18:02,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:18:02,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:18:02,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 884 transitions. [2021-03-24 22:18:02,156 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9921436588103255 [2021-03-24 22:18:02,156 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 884 transitions. [2021-03-24 22:18:02,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 884 transitions. [2021-03-24 22:18:02,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:18:02,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 884 transitions. [2021-03-24 22:18:02,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 294.6666666666667) internal successors, (884), 3 states have internal predecessors, (884), 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) [2021-03-24 22:18:02,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 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) [2021-03-24 22:18:02,157 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 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) [2021-03-24 22:18:02,157 INFO L185 Difference]: Start difference. First operand has 296 places, 149 transitions, 5919 flow. Second operand 3 states and 884 transitions. [2021-03-24 22:18:02,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 148 transitions, 5919 flow [2021-03-24 22:18:02,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 148 transitions, 663 flow, removed 2628 selfloop flow, removed 0 redundant places. [2021-03-24 22:18:02,250 INFO L241 Difference]: Finished difference. Result has 297 places, 148 transitions, 663 flow [2021-03-24 22:18:02,250 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=661, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=663, PETRI_PLACES=297, PETRI_TRANSITIONS=148} [2021-03-24 22:18:02,251 INFO L343 CegarLoopForPetriNet]: 296 programPoint places, 1 predicate places. [2021-03-24 22:18:02,251 INFO L480 AbstractCegarLoop]: Abstraction has has 297 places, 148 transitions, 663 flow [2021-03-24 22:18:02,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 294.6666666666667) internal successors, (884), 3 states have internal predecessors, (884), 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) [2021-03-24 22:18:02,251 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:18:02,251 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:18:02,251 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2021-03-24 22:18:02,251 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:18:02,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:18:02,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1012633611, now seen corresponding path program 1 times [2021-03-24 22:18:02,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:18:02,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394301435] [2021-03-24 22:18:02,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:18:02,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:18:02,264 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:18:02,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:18:02,266 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:18:02,276 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:18:02,276 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:18:02,277 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2021-03-24 22:18:02,277 WARN L342 ceAbstractionStarter]: 73 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:18:02,277 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 74 thread instances. [2021-03-24 22:18:02,350 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:18:02,350 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:18:02,351 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:18:02,351 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:18:02,351 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:18:02,351 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:18:02,351 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:18:02,351 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:18:02,351 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:18:02,351 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:18:02,352 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 376 places, 227 transitions, 6226 flow [2021-03-24 22:18:02,427 INFO L129 PetriNetUnfolder]: 0/449 cut-off events. [2021-03-24 22:18:02,427 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:18:02,427 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3447 conditions, 449 events. 0/449 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1667 event pairs, 0 based on Foata normal form. 0/374 useless extension candidates. Maximal degree in co-relation 0. Up to 75 conditions per place. [2021-03-24 22:18:02,427 INFO L82 GeneralOperation]: Start removeDead. Operand has 376 places, 227 transitions, 6226 flow [2021-03-24 22:18:02,429 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 374 places, 225 transitions, 6222 flow [2021-03-24 22:18:02,429 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:18:02,429 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 374 places, 225 transitions, 6222 flow [2021-03-24 22:18:02,429 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 374 places, 225 transitions, 6222 flow [2021-03-24 22:18:02,431 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 374 places, 225 transitions, 6222 flow [2021-03-24 22:18:02,496 INFO L129 PetriNetUnfolder]: 0/299 cut-off events. [2021-03-24 22:18:02,496 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:18:02,496 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3297 conditions, 299 events. 0/299 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 795 event pairs, 0 based on Foata normal form. 0/299 useless extension candidates. Maximal degree in co-relation 0. Up to 75 conditions per place. [2021-03-24 22:18:02,524 INFO L142 LiptonReduction]: Number of co-enabled transitions 33004 [2021-03-24 22:18:13,670 INFO L154 LiptonReduction]: Checked pairs total: 13653 [2021-03-24 22:18:13,670 INFO L156 LiptonReduction]: Total number of compositions: 74 [2021-03-24 22:18:13,671 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 11242 [2021-03-24 22:18:13,671 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:18:13,671 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:18:13,671 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:18:13,671 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:18:13,671 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:18:13,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:18:13,672 INFO L82 PathProgramCache]: Analyzing trace with hash 365731, now seen corresponding path program 1 times [2021-03-24 22:18:13,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:18:13,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416748599] [2021-03-24 22:18:13,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:18:13,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:18:13,685 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:18:13,686 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:18:13,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:18:13,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416748599] [2021-03-24 22:18:13,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:18:13,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:18:13,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509760239] [2021-03-24 22:18:13,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:18:13,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:18:13,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:18:13,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:18:13,690 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 298 out of 301 [2021-03-24 22:18:13,691 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 151 transitions, 6074 flow. Second operand has 3 states, 3 states have (on average 298.6666666666667) internal successors, (896), 3 states have internal predecessors, (896), 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) [2021-03-24 22:18:13,691 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:18:13,691 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 298 of 301 [2021-03-24 22:18:13,691 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:18:13,734 INFO L129 PetriNetUnfolder]: 0/150 cut-off events. [2021-03-24 22:18:13,734 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:18:13,735 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3150 conditions, 150 events. 0/150 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 170 event pairs, 0 based on Foata normal form. 75/225 useless extension candidates. Maximal degree in co-relation 0. Up to 75 conditions per place. [2021-03-24 22:18:13,735 INFO L132 encePairwiseOnDemand]: 299/301 looper letters, 0 selfloop transitions, 1 changer transitions 0/150 dead transitions. [2021-03-24 22:18:13,735 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 150 transitions, 6074 flow [2021-03-24 22:18:13,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:18:13,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:18:13,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 896 transitions. [2021-03-24 22:18:13,736 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9922480620155039 [2021-03-24 22:18:13,736 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 896 transitions. [2021-03-24 22:18:13,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 896 transitions. [2021-03-24 22:18:13,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:18:13,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 896 transitions. [2021-03-24 22:18:13,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 298.6666666666667) internal successors, (896), 3 states have internal predecessors, (896), 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) [2021-03-24 22:18:13,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 301.0) internal successors, (1204), 4 states have internal predecessors, (1204), 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) [2021-03-24 22:18:13,737 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 301.0) internal successors, (1204), 4 states have internal predecessors, (1204), 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) [2021-03-24 22:18:13,737 INFO L185 Difference]: Start difference. First operand has 300 places, 151 transitions, 6074 flow. Second operand 3 states and 896 transitions. [2021-03-24 22:18:13,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 150 transitions, 6074 flow [2021-03-24 22:18:13,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 150 transitions, 672 flow, removed 2701 selfloop flow, removed 0 redundant places. [2021-03-24 22:18:13,833 INFO L241 Difference]: Finished difference. Result has 301 places, 150 transitions, 672 flow [2021-03-24 22:18:13,833 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=301, PETRI_DIFFERENCE_MINUEND_FLOW=670, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=672, PETRI_PLACES=301, PETRI_TRANSITIONS=150} [2021-03-24 22:18:13,833 INFO L343 CegarLoopForPetriNet]: 300 programPoint places, 1 predicate places. [2021-03-24 22:18:13,833 INFO L480 AbstractCegarLoop]: Abstraction has has 301 places, 150 transitions, 672 flow [2021-03-24 22:18:13,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 298.6666666666667) internal successors, (896), 3 states have internal predecessors, (896), 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) [2021-03-24 22:18:13,833 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:18:13,833 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:18:13,834 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2021-03-24 22:18:13,834 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:18:13,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:18:13,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1976601769, now seen corresponding path program 1 times [2021-03-24 22:18:13,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:18:13,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947800156] [2021-03-24 22:18:13,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:18:13,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:18:13,847 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:18:13,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:18:13,850 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:18:13,862 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:18:13,862 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:18:13,862 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2021-03-24 22:18:13,862 WARN L342 ceAbstractionStarter]: 74 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:18:13,863 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 75 thread instances. [2021-03-24 22:18:13,942 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:18:13,942 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:18:13,942 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:18:13,943 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:18:13,943 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:18:13,943 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:18:13,943 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:18:13,943 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:18:13,943 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:18:13,943 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:18:13,945 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 381 places, 230 transitions, 6385 flow [2021-03-24 22:18:14,023 INFO L129 PetriNetUnfolder]: 0/455 cut-off events. [2021-03-24 22:18:14,023 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:18:14,023 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3531 conditions, 455 events. 0/455 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1673 event pairs, 0 based on Foata normal form. 0/379 useless extension candidates. Maximal degree in co-relation 0. Up to 76 conditions per place. [2021-03-24 22:18:14,024 INFO L82 GeneralOperation]: Start removeDead. Operand has 381 places, 230 transitions, 6385 flow [2021-03-24 22:18:14,025 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 379 places, 228 transitions, 6381 flow [2021-03-24 22:18:14,026 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:18:14,026 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 379 places, 228 transitions, 6381 flow [2021-03-24 22:18:14,026 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 379 places, 228 transitions, 6381 flow [2021-03-24 22:18:14,027 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 379 places, 228 transitions, 6381 flow [2021-03-24 22:18:14,089 INFO L129 PetriNetUnfolder]: 0/303 cut-off events. [2021-03-24 22:18:14,090 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:18:14,090 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3379 conditions, 303 events. 0/303 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 950 event pairs, 0 based on Foata normal form. 0/303 useless extension candidates. Maximal degree in co-relation 0. Up to 76 conditions per place. [2021-03-24 22:18:14,112 INFO L142 LiptonReduction]: Number of co-enabled transitions 33900 [2021-03-24 22:18:25,779 INFO L154 LiptonReduction]: Checked pairs total: 14025 [2021-03-24 22:18:25,779 INFO L156 LiptonReduction]: Total number of compositions: 75 [2021-03-24 22:18:25,780 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 11754 [2021-03-24 22:18:25,780 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:18:25,780 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:18:25,780 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:18:25,780 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:18:25,780 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:18:25,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:18:25,781 INFO L82 PathProgramCache]: Analyzing trace with hash 375459, now seen corresponding path program 1 times [2021-03-24 22:18:25,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:18:25,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673639954] [2021-03-24 22:18:25,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:18:25,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:18:25,795 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:18:25,796 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:18:25,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:18:25,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673639954] [2021-03-24 22:18:25,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:18:25,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:18:25,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120696094] [2021-03-24 22:18:25,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:18:25,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:18:25,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:18:25,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:18:25,800 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 302 out of 305 [2021-03-24 22:18:25,801 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 153 transitions, 6231 flow. Second operand has 3 states, 3 states have (on average 302.6666666666667) internal successors, (908), 3 states have internal predecessors, (908), 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) [2021-03-24 22:18:25,801 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:18:25,801 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 302 of 305 [2021-03-24 22:18:25,801 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:18:25,862 INFO L129 PetriNetUnfolder]: 0/152 cut-off events. [2021-03-24 22:18:25,862 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:18:25,862 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3230 conditions, 152 events. 0/152 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 147 event pairs, 0 based on Foata normal form. 76/228 useless extension candidates. Maximal degree in co-relation 0. Up to 76 conditions per place. [2021-03-24 22:18:25,863 INFO L132 encePairwiseOnDemand]: 303/305 looper letters, 0 selfloop transitions, 1 changer transitions 0/152 dead transitions. [2021-03-24 22:18:25,863 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 152 transitions, 6231 flow [2021-03-24 22:18:25,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:18:25,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:18:25,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 908 transitions. [2021-03-24 22:18:25,864 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9923497267759562 [2021-03-24 22:18:25,864 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 908 transitions. [2021-03-24 22:18:25,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 908 transitions. [2021-03-24 22:18:25,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:18:25,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 908 transitions. [2021-03-24 22:18:25,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 302.6666666666667) internal successors, (908), 3 states have internal predecessors, (908), 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) [2021-03-24 22:18:25,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 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) [2021-03-24 22:18:25,865 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 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) [2021-03-24 22:18:25,865 INFO L185 Difference]: Start difference. First operand has 304 places, 153 transitions, 6231 flow. Second operand 3 states and 908 transitions. [2021-03-24 22:18:25,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 152 transitions, 6231 flow [2021-03-24 22:18:25,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 152 transitions, 681 flow, removed 2775 selfloop flow, removed 0 redundant places. [2021-03-24 22:18:25,960 INFO L241 Difference]: Finished difference. Result has 305 places, 152 transitions, 681 flow [2021-03-24 22:18:25,960 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=679, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=681, PETRI_PLACES=305, PETRI_TRANSITIONS=152} [2021-03-24 22:18:25,960 INFO L343 CegarLoopForPetriNet]: 304 programPoint places, 1 predicate places. [2021-03-24 22:18:25,960 INFO L480 AbstractCegarLoop]: Abstraction has has 305 places, 152 transitions, 681 flow [2021-03-24 22:18:25,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 302.6666666666667) internal successors, (908), 3 states have internal predecessors, (908), 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) [2021-03-24 22:18:25,960 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:18:25,960 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:18:25,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2021-03-24 22:18:25,960 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:18:25,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:18:25,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1188060048, now seen corresponding path program 1 times [2021-03-24 22:18:25,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:18:25,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524119849] [2021-03-24 22:18:25,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:18:25,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:18:25,974 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:18:25,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:18:25,976 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:18:25,987 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:18:25,987 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:18:25,987 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2021-03-24 22:18:25,988 WARN L342 ceAbstractionStarter]: 75 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:18:25,988 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 76 thread instances. [2021-03-24 22:18:26,080 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:18:26,080 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:18:26,081 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:18:26,081 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:18:26,081 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:18:26,081 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:18:26,081 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:18:26,081 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:18:26,081 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:18:26,081 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:18:26,083 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 386 places, 233 transitions, 6546 flow [2021-03-24 22:18:26,205 INFO L129 PetriNetUnfolder]: 0/461 cut-off events. [2021-03-24 22:18:26,205 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:18:26,205 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3616 conditions, 461 events. 0/461 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1670 event pairs, 0 based on Foata normal form. 0/384 useless extension candidates. Maximal degree in co-relation 0. Up to 77 conditions per place. [2021-03-24 22:18:26,206 INFO L82 GeneralOperation]: Start removeDead. Operand has 386 places, 233 transitions, 6546 flow [2021-03-24 22:18:26,209 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 384 places, 231 transitions, 6542 flow [2021-03-24 22:18:26,209 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:18:26,209 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 384 places, 231 transitions, 6542 flow [2021-03-24 22:18:26,209 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 384 places, 231 transitions, 6542 flow [2021-03-24 22:18:26,211 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 384 places, 231 transitions, 6542 flow [2021-03-24 22:18:26,309 INFO L129 PetriNetUnfolder]: 0/307 cut-off events. [2021-03-24 22:18:26,309 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:18:26,309 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3462 conditions, 307 events. 0/307 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 992 event pairs, 0 based on Foata normal form. 0/307 useless extension candidates. Maximal degree in co-relation 0. Up to 77 conditions per place. [2021-03-24 22:18:26,345 INFO L142 LiptonReduction]: Number of co-enabled transitions 34808 [2021-03-24 22:18:37,798 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-03-24 22:18:38,814 INFO L154 LiptonReduction]: Checked pairs total: 14402 [2021-03-24 22:18:38,814 INFO L156 LiptonReduction]: Total number of compositions: 76 [2021-03-24 22:18:38,814 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 12605 [2021-03-24 22:18:38,815 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:18:38,815 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:18:38,815 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:18:38,815 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:18:38,815 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:18:38,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:18:38,815 INFO L82 PathProgramCache]: Analyzing trace with hash 385315, now seen corresponding path program 1 times [2021-03-24 22:18:38,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:18:38,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918451307] [2021-03-24 22:18:38,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:18:38,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:18:38,840 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:18:38,841 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:18:38,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:18:38,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918451307] [2021-03-24 22:18:38,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:18:38,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:18:38,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462917012] [2021-03-24 22:18:38,846 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:18:38,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:18:38,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:18:38,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:18:38,847 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 306 out of 309 [2021-03-24 22:18:38,848 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 155 transitions, 6390 flow. Second operand has 3 states, 3 states have (on average 306.6666666666667) internal successors, (920), 3 states have internal predecessors, (920), 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) [2021-03-24 22:18:38,848 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:18:38,848 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 306 of 309 [2021-03-24 22:18:38,848 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:18:38,915 INFO L129 PetriNetUnfolder]: 0/154 cut-off events. [2021-03-24 22:18:38,915 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:18:38,915 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3311 conditions, 154 events. 0/154 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 124 event pairs, 0 based on Foata normal form. 77/231 useless extension candidates. Maximal degree in co-relation 0. Up to 77 conditions per place. [2021-03-24 22:18:38,916 INFO L132 encePairwiseOnDemand]: 307/309 looper letters, 0 selfloop transitions, 1 changer transitions 0/154 dead transitions. [2021-03-24 22:18:38,916 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 154 transitions, 6390 flow [2021-03-24 22:18:38,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:18:38,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:18:38,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 920 transitions. [2021-03-24 22:18:38,917 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9924487594390508 [2021-03-24 22:18:38,917 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 920 transitions. [2021-03-24 22:18:38,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 920 transitions. [2021-03-24 22:18:38,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:18:38,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 920 transitions. [2021-03-24 22:18:38,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 306.6666666666667) internal successors, (920), 3 states have internal predecessors, (920), 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) [2021-03-24 22:18:38,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 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) [2021-03-24 22:18:38,919 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 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) [2021-03-24 22:18:38,919 INFO L185 Difference]: Start difference. First operand has 308 places, 155 transitions, 6390 flow. Second operand 3 states and 920 transitions. [2021-03-24 22:18:38,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 154 transitions, 6390 flow [2021-03-24 22:18:39,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 154 transitions, 690 flow, removed 2850 selfloop flow, removed 0 redundant places. [2021-03-24 22:18:39,071 INFO L241 Difference]: Finished difference. Result has 309 places, 154 transitions, 690 flow [2021-03-24 22:18:39,071 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=688, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=690, PETRI_PLACES=309, PETRI_TRANSITIONS=154} [2021-03-24 22:18:39,071 INFO L343 CegarLoopForPetriNet]: 308 programPoint places, 1 predicate places. [2021-03-24 22:18:39,071 INFO L480 AbstractCegarLoop]: Abstraction has has 309 places, 154 transitions, 690 flow [2021-03-24 22:18:39,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 306.6666666666667) internal successors, (920), 3 states have internal predecessors, (920), 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) [2021-03-24 22:18:39,072 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:18:39,072 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:18:39,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2021-03-24 22:18:39,072 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:18:39,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:18:39,072 INFO L82 PathProgramCache]: Analyzing trace with hash 795407642, now seen corresponding path program 1 times [2021-03-24 22:18:39,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:18:39,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309903765] [2021-03-24 22:18:39,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:18:39,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:18:39,089 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:18:39,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:18:39,091 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:18:39,105 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:18:39,105 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:18:39,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2021-03-24 22:18:39,106 WARN L342 ceAbstractionStarter]: 76 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:18:39,106 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 77 thread instances. [2021-03-24 22:18:39,190 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:18:39,190 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:18:39,190 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:18:39,190 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:18:39,190 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:18:39,190 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:18:39,190 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:18:39,190 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:18:39,190 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:18:39,191 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:18:39,193 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 391 places, 236 transitions, 6709 flow [2021-03-24 22:18:39,285 INFO L129 PetriNetUnfolder]: 0/467 cut-off events. [2021-03-24 22:18:39,286 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:18:39,286 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3702 conditions, 467 events. 0/467 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1773 event pairs, 0 based on Foata normal form. 0/389 useless extension candidates. Maximal degree in co-relation 0. Up to 78 conditions per place. [2021-03-24 22:18:39,286 INFO L82 GeneralOperation]: Start removeDead. Operand has 391 places, 236 transitions, 6709 flow [2021-03-24 22:18:39,288 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 389 places, 234 transitions, 6705 flow [2021-03-24 22:18:39,288 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:18:39,288 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 389 places, 234 transitions, 6705 flow [2021-03-24 22:18:39,288 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 389 places, 234 transitions, 6705 flow [2021-03-24 22:18:39,290 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 389 places, 234 transitions, 6705 flow [2021-03-24 22:18:39,356 INFO L129 PetriNetUnfolder]: 0/311 cut-off events. [2021-03-24 22:18:39,356 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:18:39,357 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3546 conditions, 311 events. 0/311 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 961 event pairs, 0 based on Foata normal form. 0/311 useless extension candidates. Maximal degree in co-relation 0. Up to 78 conditions per place. [2021-03-24 22:18:39,381 INFO L142 LiptonReduction]: Number of co-enabled transitions 35728 [2021-03-24 22:18:51,695 INFO L154 LiptonReduction]: Checked pairs total: 14784 [2021-03-24 22:18:51,695 INFO L156 LiptonReduction]: Total number of compositions: 77 [2021-03-24 22:18:51,696 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 12408 [2021-03-24 22:18:51,696 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:18:51,696 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:18:51,696 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:18:51,697 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:18:51,697 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:18:51,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:18:51,697 INFO L82 PathProgramCache]: Analyzing trace with hash 395299, now seen corresponding path program 1 times [2021-03-24 22:18:51,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:18:51,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978205610] [2021-03-24 22:18:51,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:18:51,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:18:51,713 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:18:51,714 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:18:51,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:18:51,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978205610] [2021-03-24 22:18:51,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:18:51,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:18:51,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625447847] [2021-03-24 22:18:51,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:18:51,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:18:51,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:18:51,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:18:51,719 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 313 [2021-03-24 22:18:51,719 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 157 transitions, 6551 flow. Second operand has 3 states, 3 states have (on average 310.6666666666667) internal successors, (932), 3 states have internal predecessors, (932), 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) [2021-03-24 22:18:51,719 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:18:51,719 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 313 [2021-03-24 22:18:51,719 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:18:51,767 INFO L129 PetriNetUnfolder]: 0/156 cut-off events. [2021-03-24 22:18:51,767 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:18:51,767 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3393 conditions, 156 events. 0/156 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 145 event pairs, 0 based on Foata normal form. 78/234 useless extension candidates. Maximal degree in co-relation 0. Up to 78 conditions per place. [2021-03-24 22:18:51,767 INFO L132 encePairwiseOnDemand]: 311/313 looper letters, 0 selfloop transitions, 1 changer transitions 0/156 dead transitions. [2021-03-24 22:18:51,767 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 156 transitions, 6551 flow [2021-03-24 22:18:51,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:18:51,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:18:51,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 932 transitions. [2021-03-24 22:18:51,768 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9925452609158679 [2021-03-24 22:18:51,768 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 932 transitions. [2021-03-24 22:18:51,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 932 transitions. [2021-03-24 22:18:51,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:18:51,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 932 transitions. [2021-03-24 22:18:51,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 310.6666666666667) internal successors, (932), 3 states have internal predecessors, (932), 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) [2021-03-24 22:18:51,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 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) [2021-03-24 22:18:51,770 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 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) [2021-03-24 22:18:51,770 INFO L185 Difference]: Start difference. First operand has 312 places, 157 transitions, 6551 flow. Second operand 3 states and 932 transitions. [2021-03-24 22:18:51,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 156 transitions, 6551 flow [2021-03-24 22:18:51,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 156 transitions, 699 flow, removed 2926 selfloop flow, removed 0 redundant places. [2021-03-24 22:18:51,882 INFO L241 Difference]: Finished difference. Result has 313 places, 156 transitions, 699 flow [2021-03-24 22:18:51,882 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=697, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=699, PETRI_PLACES=313, PETRI_TRANSITIONS=156} [2021-03-24 22:18:51,882 INFO L343 CegarLoopForPetriNet]: 312 programPoint places, 1 predicate places. [2021-03-24 22:18:51,882 INFO L480 AbstractCegarLoop]: Abstraction has has 313 places, 156 transitions, 699 flow [2021-03-24 22:18:51,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 310.6666666666667) internal successors, (932), 3 states have internal predecessors, (932), 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) [2021-03-24 22:18:51,882 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:18:51,883 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:18:51,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2021-03-24 22:18:51,883 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:18:51,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:18:51,883 INFO L82 PathProgramCache]: Analyzing trace with hash 2117439739, now seen corresponding path program 1 times [2021-03-24 22:18:51,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:18:51,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634182100] [2021-03-24 22:18:51,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:18:51,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:18:51,897 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:18:51,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:18:51,900 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:18:51,913 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:18:51,913 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:18:51,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2021-03-24 22:18:51,913 WARN L342 ceAbstractionStarter]: 77 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:18:51,913 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 78 thread instances. [2021-03-24 22:18:52,000 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:18:52,001 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:18:52,001 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:18:52,001 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:18:52,001 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:18:52,001 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:18:52,001 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:18:52,001 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:18:52,002 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:18:52,002 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:18:52,004 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 396 places, 239 transitions, 6874 flow [2021-03-24 22:18:52,128 INFO L129 PetriNetUnfolder]: 0/473 cut-off events. [2021-03-24 22:18:52,129 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:18:52,129 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3789 conditions, 473 events. 0/473 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1740 event pairs, 0 based on Foata normal form. 0/394 useless extension candidates. Maximal degree in co-relation 0. Up to 79 conditions per place. [2021-03-24 22:18:52,129 INFO L82 GeneralOperation]: Start removeDead. Operand has 396 places, 239 transitions, 6874 flow [2021-03-24 22:18:52,132 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 394 places, 237 transitions, 6870 flow [2021-03-24 22:18:52,132 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:18:52,132 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 394 places, 237 transitions, 6870 flow [2021-03-24 22:18:52,132 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 394 places, 237 transitions, 6870 flow [2021-03-24 22:18:52,134 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 394 places, 237 transitions, 6870 flow [2021-03-24 22:18:52,236 INFO L129 PetriNetUnfolder]: 0/315 cut-off events. [2021-03-24 22:18:52,237 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:18:52,237 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3631 conditions, 315 events. 0/315 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 950 event pairs, 0 based on Foata normal form. 0/315 useless extension candidates. Maximal degree in co-relation 0. Up to 79 conditions per place. [2021-03-24 22:18:52,275 INFO L142 LiptonReduction]: Number of co-enabled transitions 36660 [2021-03-24 22:19:06,382 INFO L154 LiptonReduction]: Checked pairs total: 15171 [2021-03-24 22:19:06,382 INFO L156 LiptonReduction]: Total number of compositions: 78 [2021-03-24 22:19:06,382 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 14250 [2021-03-24 22:19:06,383 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:19:06,383 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:19:06,383 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:19:06,383 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:19:06,383 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:19:06,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:19:06,384 INFO L82 PathProgramCache]: Analyzing trace with hash 405411, now seen corresponding path program 1 times [2021-03-24 22:19:06,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:19:06,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125952942] [2021-03-24 22:19:06,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:19:06,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:19:06,400 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:19:06,401 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:19:06,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:19:06,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125952942] [2021-03-24 22:19:06,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:19:06,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:19:06,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679317424] [2021-03-24 22:19:06,405 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:19:06,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:19:06,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:19:06,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:19:06,406 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 317 [2021-03-24 22:19:06,406 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 159 transitions, 6714 flow. Second operand has 3 states, 3 states have (on average 314.6666666666667) internal successors, (944), 3 states have internal predecessors, (944), 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) [2021-03-24 22:19:06,406 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:19:06,406 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 317 [2021-03-24 22:19:06,406 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:19:06,457 INFO L129 PetriNetUnfolder]: 0/158 cut-off events. [2021-03-24 22:19:06,457 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:19:06,457 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3476 conditions, 158 events. 0/158 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 166 event pairs, 0 based on Foata normal form. 79/237 useless extension candidates. Maximal degree in co-relation 0. Up to 79 conditions per place. [2021-03-24 22:19:06,458 INFO L132 encePairwiseOnDemand]: 315/317 looper letters, 0 selfloop transitions, 1 changer transitions 0/158 dead transitions. [2021-03-24 22:19:06,458 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 158 transitions, 6714 flow [2021-03-24 22:19:06,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:19:06,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:19:06,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 944 transitions. [2021-03-24 22:19:06,459 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9926393270241851 [2021-03-24 22:19:06,459 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 944 transitions. [2021-03-24 22:19:06,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 944 transitions. [2021-03-24 22:19:06,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:19:06,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 944 transitions. [2021-03-24 22:19:06,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 314.6666666666667) internal successors, (944), 3 states have internal predecessors, (944), 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) [2021-03-24 22:19:06,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 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) [2021-03-24 22:19:06,461 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 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) [2021-03-24 22:19:06,461 INFO L185 Difference]: Start difference. First operand has 316 places, 159 transitions, 6714 flow. Second operand 3 states and 944 transitions. [2021-03-24 22:19:06,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 158 transitions, 6714 flow [2021-03-24 22:19:06,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 158 transitions, 708 flow, removed 3003 selfloop flow, removed 0 redundant places. [2021-03-24 22:19:06,572 INFO L241 Difference]: Finished difference. Result has 317 places, 158 transitions, 708 flow [2021-03-24 22:19:06,572 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=706, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=708, PETRI_PLACES=317, PETRI_TRANSITIONS=158} [2021-03-24 22:19:06,572 INFO L343 CegarLoopForPetriNet]: 316 programPoint places, 1 predicate places. [2021-03-24 22:19:06,572 INFO L480 AbstractCegarLoop]: Abstraction has has 317 places, 158 transitions, 708 flow [2021-03-24 22:19:06,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 314.6666666666667) internal successors, (944), 3 states have internal predecessors, (944), 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) [2021-03-24 22:19:06,572 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:19:06,573 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:19:06,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2021-03-24 22:19:06,573 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:19:06,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:19:06,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1047065309, now seen corresponding path program 1 times [2021-03-24 22:19:06,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:19:06,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913045332] [2021-03-24 22:19:06,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:19:06,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:19:06,589 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:19:06,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:19:06,591 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:19:06,604 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:19:06,604 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:19:06,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2021-03-24 22:19:06,605 WARN L342 ceAbstractionStarter]: 78 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:19:06,605 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 79 thread instances. [2021-03-24 22:19:06,715 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:19:06,716 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:19:06,716 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:19:06,716 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:19:06,716 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:19:06,716 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:19:06,716 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:19:06,716 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:19:06,716 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:19:06,716 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:19:06,718 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 401 places, 242 transitions, 7041 flow [2021-03-24 22:19:06,805 INFO L129 PetriNetUnfolder]: 0/479 cut-off events. [2021-03-24 22:19:06,805 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:19:06,805 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3877 conditions, 479 events. 0/479 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1727 event pairs, 0 based on Foata normal form. 0/399 useless extension candidates. Maximal degree in co-relation 0. Up to 80 conditions per place. [2021-03-24 22:19:06,805 INFO L82 GeneralOperation]: Start removeDead. Operand has 401 places, 242 transitions, 7041 flow [2021-03-24 22:19:06,808 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 399 places, 240 transitions, 7037 flow [2021-03-24 22:19:06,808 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:19:06,808 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 399 places, 240 transitions, 7037 flow [2021-03-24 22:19:06,808 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 399 places, 240 transitions, 7037 flow [2021-03-24 22:19:06,809 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 399 places, 240 transitions, 7037 flow [2021-03-24 22:19:06,880 INFO L129 PetriNetUnfolder]: 0/319 cut-off events. [2021-03-24 22:19:06,881 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:19:06,881 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3717 conditions, 319 events. 0/319 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1007 event pairs, 0 based on Foata normal form. 0/319 useless extension candidates. Maximal degree in co-relation 0. Up to 80 conditions per place. [2021-03-24 22:19:06,906 INFO L142 LiptonReduction]: Number of co-enabled transitions 37604 [2021-03-24 22:19:22,461 INFO L154 LiptonReduction]: Checked pairs total: 15563 [2021-03-24 22:19:22,461 INFO L156 LiptonReduction]: Total number of compositions: 79 [2021-03-24 22:19:22,461 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 15653 [2021-03-24 22:19:22,462 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:19:22,462 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:19:22,462 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:19:22,462 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:19:22,462 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:19:22,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:19:22,463 INFO L82 PathProgramCache]: Analyzing trace with hash 415651, now seen corresponding path program 1 times [2021-03-24 22:19:22,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:19:22,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138612262] [2021-03-24 22:19:22,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:19:22,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:19:22,481 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:19:22,482 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:19:22,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:19:22,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138612262] [2021-03-24 22:19:22,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:19:22,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:19:22,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661881981] [2021-03-24 22:19:22,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:19:22,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:19:22,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:19:22,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:19:22,487 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 321 [2021-03-24 22:19:22,488 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 161 transitions, 6879 flow. Second operand has 3 states, 3 states have (on average 318.6666666666667) internal successors, (956), 3 states have internal predecessors, (956), 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) [2021-03-24 22:19:22,488 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:19:22,488 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 321 [2021-03-24 22:19:22,488 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:19:22,537 INFO L129 PetriNetUnfolder]: 0/160 cut-off events. [2021-03-24 22:19:22,538 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:19:22,538 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3560 conditions, 160 events. 0/160 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 151 event pairs, 0 based on Foata normal form. 80/240 useless extension candidates. Maximal degree in co-relation 0. Up to 80 conditions per place. [2021-03-24 22:19:22,538 INFO L132 encePairwiseOnDemand]: 319/321 looper letters, 0 selfloop transitions, 1 changer transitions 0/160 dead transitions. [2021-03-24 22:19:22,538 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 160 transitions, 6879 flow [2021-03-24 22:19:22,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:19:22,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:19:22,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 956 transitions. [2021-03-24 22:19:22,539 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9927310488058152 [2021-03-24 22:19:22,539 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 956 transitions. [2021-03-24 22:19:22,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 956 transitions. [2021-03-24 22:19:22,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:19:22,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 956 transitions. [2021-03-24 22:19:22,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 318.6666666666667) internal successors, (956), 3 states have internal predecessors, (956), 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) [2021-03-24 22:19:22,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 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) [2021-03-24 22:19:22,540 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 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) [2021-03-24 22:19:22,540 INFO L185 Difference]: Start difference. First operand has 320 places, 161 transitions, 6879 flow. Second operand 3 states and 956 transitions. [2021-03-24 22:19:22,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 160 transitions, 6879 flow [2021-03-24 22:19:22,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 160 transitions, 717 flow, removed 3081 selfloop flow, removed 0 redundant places. [2021-03-24 22:19:22,658 INFO L241 Difference]: Finished difference. Result has 321 places, 160 transitions, 717 flow [2021-03-24 22:19:22,658 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=715, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=717, PETRI_PLACES=321, PETRI_TRANSITIONS=160} [2021-03-24 22:19:22,658 INFO L343 CegarLoopForPetriNet]: 320 programPoint places, 1 predicate places. [2021-03-24 22:19:22,658 INFO L480 AbstractCegarLoop]: Abstraction has has 321 places, 160 transitions, 717 flow [2021-03-24 22:19:22,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 318.6666666666667) internal successors, (956), 3 states have internal predecessors, (956), 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) [2021-03-24 22:19:22,658 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:19:22,658 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:19:22,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2021-03-24 22:19:22,658 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:19:22,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:19:22,659 INFO L82 PathProgramCache]: Analyzing trace with hash 2125115286, now seen corresponding path program 1 times [2021-03-24 22:19:22,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:19:22,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131301370] [2021-03-24 22:19:22,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:19:22,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:19:22,679 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:19:22,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:19:22,681 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:19:22,695 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:19:22,695 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:19:22,695 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2021-03-24 22:19:22,695 WARN L342 ceAbstractionStarter]: 79 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:19:22,695 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 80 thread instances. [2021-03-24 22:19:22,811 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:19:22,811 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:19:22,811 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:19:22,811 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:19:22,811 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:19:22,811 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:19:22,811 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:19:22,812 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:19:22,812 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:19:22,812 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:19:22,814 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 406 places, 245 transitions, 7210 flow [2021-03-24 22:19:22,948 INFO L129 PetriNetUnfolder]: 0/485 cut-off events. [2021-03-24 22:19:22,948 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:19:22,949 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3966 conditions, 485 events. 0/485 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1761 event pairs, 0 based on Foata normal form. 0/404 useless extension candidates. Maximal degree in co-relation 0. Up to 81 conditions per place. [2021-03-24 22:19:22,949 INFO L82 GeneralOperation]: Start removeDead. Operand has 406 places, 245 transitions, 7210 flow [2021-03-24 22:19:22,952 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 404 places, 243 transitions, 7206 flow [2021-03-24 22:19:22,952 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:19:22,952 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 404 places, 243 transitions, 7206 flow [2021-03-24 22:19:22,952 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 404 places, 243 transitions, 7206 flow [2021-03-24 22:19:22,955 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 404 places, 243 transitions, 7206 flow [2021-03-24 22:19:23,056 INFO L129 PetriNetUnfolder]: 0/323 cut-off events. [2021-03-24 22:19:23,056 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:19:23,056 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3804 conditions, 323 events. 0/323 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 967 event pairs, 0 based on Foata normal form. 0/323 useless extension candidates. Maximal degree in co-relation 0. Up to 81 conditions per place. [2021-03-24 22:19:23,083 INFO L142 LiptonReduction]: Number of co-enabled transitions 38560 [2021-03-24 22:19:39,282 INFO L154 LiptonReduction]: Checked pairs total: 15960 [2021-03-24 22:19:39,282 INFO L156 LiptonReduction]: Total number of compositions: 80 [2021-03-24 22:19:39,282 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 16330 [2021-03-24 22:19:39,283 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-03-24 22:19:39,283 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:19:39,283 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:19:39,283 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:19:39,283 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:19:39,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:19:39,284 INFO L82 PathProgramCache]: Analyzing trace with hash 426019, now seen corresponding path program 1 times [2021-03-24 22:19:39,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:19:39,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002525834] [2021-03-24 22:19:39,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:19:39,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:19:39,303 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:19:39,304 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:19:39,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:19:39,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002525834] [2021-03-24 22:19:39,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:19:39,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:19:39,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610741688] [2021-03-24 22:19:39,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:19:39,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:19:39,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:19:39,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:19:39,310 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 322 out of 325 [2021-03-24 22:19:39,310 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 163 transitions, 7046 flow. Second operand has 3 states, 3 states have (on average 322.6666666666667) internal successors, (968), 3 states have internal predecessors, (968), 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) [2021-03-24 22:19:39,310 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:19:39,310 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 322 of 325 [2021-03-24 22:19:39,310 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:19:39,361 INFO L129 PetriNetUnfolder]: 0/162 cut-off events. [2021-03-24 22:19:39,361 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:19:39,361 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3645 conditions, 162 events. 0/162 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 152 event pairs, 0 based on Foata normal form. 81/243 useless extension candidates. Maximal degree in co-relation 0. Up to 81 conditions per place. [2021-03-24 22:19:39,362 INFO L132 encePairwiseOnDemand]: 323/325 looper letters, 0 selfloop transitions, 1 changer transitions 0/162 dead transitions. [2021-03-24 22:19:39,362 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 162 transitions, 7046 flow [2021-03-24 22:19:39,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:19:39,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:19:39,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 968 transitions. [2021-03-24 22:19:39,362 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9928205128205129 [2021-03-24 22:19:39,362 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 968 transitions. [2021-03-24 22:19:39,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 968 transitions. [2021-03-24 22:19:39,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:19:39,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 968 transitions. [2021-03-24 22:19:39,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 322.6666666666667) internal successors, (968), 3 states have internal predecessors, (968), 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) [2021-03-24 22:19:39,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 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) [2021-03-24 22:19:39,364 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 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) [2021-03-24 22:19:39,364 INFO L185 Difference]: Start difference. First operand has 324 places, 163 transitions, 7046 flow. Second operand 3 states and 968 transitions. [2021-03-24 22:19:39,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 162 transitions, 7046 flow [2021-03-24 22:19:39,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 162 transitions, 726 flow, removed 3160 selfloop flow, removed 0 redundant places. [2021-03-24 22:19:39,485 INFO L241 Difference]: Finished difference. Result has 325 places, 162 transitions, 726 flow [2021-03-24 22:19:39,485 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=724, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=726, PETRI_PLACES=325, PETRI_TRANSITIONS=162} [2021-03-24 22:19:39,485 INFO L343 CegarLoopForPetriNet]: 324 programPoint places, 1 predicate places. [2021-03-24 22:19:39,485 INFO L480 AbstractCegarLoop]: Abstraction has has 325 places, 162 transitions, 726 flow [2021-03-24 22:19:39,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 322.6666666666667) internal successors, (968), 3 states have internal predecessors, (968), 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) [2021-03-24 22:19:39,485 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:19:39,485 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:19:39,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2021-03-24 22:19:39,485 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:19:39,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:19:39,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1215918752, now seen corresponding path program 1 times [2021-03-24 22:19:39,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:19:39,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112852249] [2021-03-24 22:19:39,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:19:39,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:19:39,504 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:19:39,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:19:39,506 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:19:39,519 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:19:39,519 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:19:39,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2021-03-24 22:19:39,519 WARN L342 ceAbstractionStarter]: 80 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:19:39,520 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 81 thread instances. [2021-03-24 22:19:39,614 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:19:39,615 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:19:39,615 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:19:39,615 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:19:39,615 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:19:39,615 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:19:39,615 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:19:39,615 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:19:39,615 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:19:39,615 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:19:39,617 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 411 places, 248 transitions, 7381 flow [2021-03-24 22:19:39,710 INFO L129 PetriNetUnfolder]: 0/491 cut-off events. [2021-03-24 22:19:39,710 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:19:39,710 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4056 conditions, 491 events. 0/491 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1826 event pairs, 0 based on Foata normal form. 0/409 useless extension candidates. Maximal degree in co-relation 0. Up to 82 conditions per place. [2021-03-24 22:19:39,710 INFO L82 GeneralOperation]: Start removeDead. Operand has 411 places, 248 transitions, 7381 flow [2021-03-24 22:19:39,712 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 409 places, 246 transitions, 7377 flow [2021-03-24 22:19:39,712 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:19:39,713 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 409 places, 246 transitions, 7377 flow [2021-03-24 22:19:39,713 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 409 places, 246 transitions, 7377 flow [2021-03-24 22:19:39,714 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 409 places, 246 transitions, 7377 flow [2021-03-24 22:19:39,790 INFO L129 PetriNetUnfolder]: 0/327 cut-off events. [2021-03-24 22:19:39,791 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:19:39,791 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3892 conditions, 327 events. 0/327 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 904 event pairs, 0 based on Foata normal form. 0/327 useless extension candidates. Maximal degree in co-relation 0. Up to 82 conditions per place. [2021-03-24 22:19:39,818 INFO L142 LiptonReduction]: Number of co-enabled transitions 39528 [2021-03-24 22:19:57,378 INFO L154 LiptonReduction]: Checked pairs total: 16362 [2021-03-24 22:19:57,379 INFO L156 LiptonReduction]: Total number of compositions: 81 [2021-03-24 22:19:57,379 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 17667 [2021-03-24 22:19:57,380 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:19:57,380 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:19:57,380 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:19:57,380 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:19:57,380 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:19:57,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:19:57,380 INFO L82 PathProgramCache]: Analyzing trace with hash 436515, now seen corresponding path program 1 times [2021-03-24 22:19:57,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:19:57,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79533411] [2021-03-24 22:19:57,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:19:57,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:19:57,402 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:19:57,403 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:19:57,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:19:57,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79533411] [2021-03-24 22:19:57,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:19:57,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:19:57,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24937582] [2021-03-24 22:19:57,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:19:57,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:19:57,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:19:57,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:19:57,408 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 329 [2021-03-24 22:19:57,409 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 165 transitions, 7215 flow. Second operand has 3 states, 3 states have (on average 326.6666666666667) internal successors, (980), 3 states have internal predecessors, (980), 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) [2021-03-24 22:19:57,409 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:19:57,409 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 329 [2021-03-24 22:19:57,409 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:19:57,462 INFO L129 PetriNetUnfolder]: 0/164 cut-off events. [2021-03-24 22:19:57,462 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:19:57,462 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3731 conditions, 164 events. 0/164 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 153 event pairs, 0 based on Foata normal form. 82/246 useless extension candidates. Maximal degree in co-relation 0. Up to 82 conditions per place. [2021-03-24 22:19:57,462 INFO L132 encePairwiseOnDemand]: 327/329 looper letters, 0 selfloop transitions, 1 changer transitions 0/164 dead transitions. [2021-03-24 22:19:57,462 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 164 transitions, 7215 flow [2021-03-24 22:19:57,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:19:57,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:19:57,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 980 transitions. [2021-03-24 22:19:57,463 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9929078014184397 [2021-03-24 22:19:57,463 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 980 transitions. [2021-03-24 22:19:57,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 980 transitions. [2021-03-24 22:19:57,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:19:57,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 980 transitions. [2021-03-24 22:19:57,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 326.6666666666667) internal successors, (980), 3 states have internal predecessors, (980), 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) [2021-03-24 22:19:57,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 329.0) internal successors, (1316), 4 states have internal predecessors, (1316), 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) [2021-03-24 22:19:57,465 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 329.0) internal successors, (1316), 4 states have internal predecessors, (1316), 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) [2021-03-24 22:19:57,465 INFO L185 Difference]: Start difference. First operand has 328 places, 165 transitions, 7215 flow. Second operand 3 states and 980 transitions. [2021-03-24 22:19:57,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 164 transitions, 7215 flow [2021-03-24 22:19:57,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 164 transitions, 735 flow, removed 3240 selfloop flow, removed 0 redundant places. [2021-03-24 22:19:57,608 INFO L241 Difference]: Finished difference. Result has 329 places, 164 transitions, 735 flow [2021-03-24 22:19:57,608 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=733, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=735, PETRI_PLACES=329, PETRI_TRANSITIONS=164} [2021-03-24 22:19:57,608 INFO L343 CegarLoopForPetriNet]: 328 programPoint places, 1 predicate places. [2021-03-24 22:19:57,608 INFO L480 AbstractCegarLoop]: Abstraction has has 329 places, 164 transitions, 735 flow [2021-03-24 22:19:57,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 326.6666666666667) internal successors, (980), 3 states have internal predecessors, (980), 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) [2021-03-24 22:19:57,608 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:19:57,608 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:19:57,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2021-03-24 22:19:57,608 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:19:57,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:19:57,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1883866559, now seen corresponding path program 1 times [2021-03-24 22:19:57,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:19:57,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640485045] [2021-03-24 22:19:57,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:19:57,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:19:57,624 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:19:57,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:19:57,627 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:19:57,642 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:19:57,642 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:19:57,642 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2021-03-24 22:19:57,642 WARN L342 ceAbstractionStarter]: 81 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:19:57,642 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 82 thread instances. [2021-03-24 22:19:57,746 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:19:57,746 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:19:57,746 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:19:57,746 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:19:57,746 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:19:57,746 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:19:57,747 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:19:57,747 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:19:57,747 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:19:57,747 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:19:57,748 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 416 places, 251 transitions, 7554 flow [2021-03-24 22:19:57,842 INFO L129 PetriNetUnfolder]: 0/497 cut-off events. [2021-03-24 22:19:57,842 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:19:57,842 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4147 conditions, 497 events. 0/497 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1845 event pairs, 0 based on Foata normal form. 0/414 useless extension candidates. Maximal degree in co-relation 0. Up to 83 conditions per place. [2021-03-24 22:19:57,842 INFO L82 GeneralOperation]: Start removeDead. Operand has 416 places, 251 transitions, 7554 flow [2021-03-24 22:19:57,845 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 414 places, 249 transitions, 7550 flow [2021-03-24 22:19:57,845 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:19:57,845 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 414 places, 249 transitions, 7550 flow [2021-03-24 22:19:57,845 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 414 places, 249 transitions, 7550 flow [2021-03-24 22:19:57,846 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 414 places, 249 transitions, 7550 flow [2021-03-24 22:19:57,938 INFO L129 PetriNetUnfolder]: 0/331 cut-off events. [2021-03-24 22:19:57,938 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:19:57,939 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3981 conditions, 331 events. 0/331 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 963 event pairs, 0 based on Foata normal form. 0/331 useless extension candidates. Maximal degree in co-relation 0. Up to 83 conditions per place. [2021-03-24 22:19:57,967 INFO L142 LiptonReduction]: Number of co-enabled transitions 40508 [2021-03-24 22:20:17,413 INFO L154 LiptonReduction]: Checked pairs total: 16769 [2021-03-24 22:20:17,413 INFO L156 LiptonReduction]: Total number of compositions: 82 [2021-03-24 22:20:17,413 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 19568 [2021-03-24 22:20:17,414 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:20:17,414 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:20:17,414 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:20:17,414 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:20:17,414 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:20:17,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:20:17,414 INFO L82 PathProgramCache]: Analyzing trace with hash 447139, now seen corresponding path program 1 times [2021-03-24 22:20:17,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:20:17,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585666090] [2021-03-24 22:20:17,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:20:17,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:20:17,433 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:20:17,434 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:20:17,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:20:17,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585666090] [2021-03-24 22:20:17,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:20:17,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:20:17,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290217779] [2021-03-24 22:20:17,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:20:17,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:20:17,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:20:17,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:20:17,440 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 330 out of 333 [2021-03-24 22:20:17,441 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 167 transitions, 7386 flow. Second operand has 3 states, 3 states have (on average 330.6666666666667) internal successors, (992), 3 states have internal predecessors, (992), 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) [2021-03-24 22:20:17,441 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:20:17,441 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 330 of 333 [2021-03-24 22:20:17,441 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:20:17,495 INFO L129 PetriNetUnfolder]: 0/166 cut-off events. [2021-03-24 22:20:17,496 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:20:17,496 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3818 conditions, 166 events. 0/166 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 184 event pairs, 0 based on Foata normal form. 83/249 useless extension candidates. Maximal degree in co-relation 0. Up to 83 conditions per place. [2021-03-24 22:20:17,496 INFO L132 encePairwiseOnDemand]: 331/333 looper letters, 0 selfloop transitions, 1 changer transitions 0/166 dead transitions. [2021-03-24 22:20:17,496 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 166 transitions, 7386 flow [2021-03-24 22:20:17,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:20:17,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:20:17,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 992 transitions. [2021-03-24 22:20:17,497 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.992992992992993 [2021-03-24 22:20:17,497 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 992 transitions. [2021-03-24 22:20:17,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 992 transitions. [2021-03-24 22:20:17,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:20:17,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 992 transitions. [2021-03-24 22:20:17,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 330.6666666666667) internal successors, (992), 3 states have internal predecessors, (992), 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) [2021-03-24 22:20:17,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 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) [2021-03-24 22:20:17,499 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 333.0) internal successors, (1332), 4 states have internal predecessors, (1332), 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) [2021-03-24 22:20:17,499 INFO L185 Difference]: Start difference. First operand has 332 places, 167 transitions, 7386 flow. Second operand 3 states and 992 transitions. [2021-03-24 22:20:17,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 166 transitions, 7386 flow [2021-03-24 22:20:17,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 166 transitions, 744 flow, removed 3321 selfloop flow, removed 0 redundant places. [2021-03-24 22:20:17,681 INFO L241 Difference]: Finished difference. Result has 333 places, 166 transitions, 744 flow [2021-03-24 22:20:17,681 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=333, PETRI_DIFFERENCE_MINUEND_FLOW=742, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=744, PETRI_PLACES=333, PETRI_TRANSITIONS=166} [2021-03-24 22:20:17,681 INFO L343 CegarLoopForPetriNet]: 332 programPoint places, 1 predicate places. [2021-03-24 22:20:17,681 INFO L480 AbstractCegarLoop]: Abstraction has has 333 places, 166 transitions, 744 flow [2021-03-24 22:20:17,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 330.6666666666667) internal successors, (992), 3 states have internal predecessors, (992), 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) [2021-03-24 22:20:17,681 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:20:17,681 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:20:17,682 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2021-03-24 22:20:17,682 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:20:17,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:20:17,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1599175267, now seen corresponding path program 1 times [2021-03-24 22:20:17,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:20:17,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663164784] [2021-03-24 22:20:17,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:20:17,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:20:17,703 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:20:17,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:20:17,705 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:20:17,721 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:20:17,721 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:20:17,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2021-03-24 22:20:17,721 WARN L342 ceAbstractionStarter]: 82 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:20:17,721 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 83 thread instances. [2021-03-24 22:20:17,866 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:20:17,866 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:20:17,867 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:20:17,867 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:20:17,867 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:20:17,867 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:20:17,867 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:20:17,867 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:20:17,867 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:20:17,867 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:20:17,869 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 421 places, 254 transitions, 7729 flow [2021-03-24 22:20:18,006 INFO L129 PetriNetUnfolder]: 0/503 cut-off events. [2021-03-24 22:20:18,006 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:20:18,007 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4239 conditions, 503 events. 0/503 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1847 event pairs, 0 based on Foata normal form. 0/419 useless extension candidates. Maximal degree in co-relation 0. Up to 84 conditions per place. [2021-03-24 22:20:18,007 INFO L82 GeneralOperation]: Start removeDead. Operand has 421 places, 254 transitions, 7729 flow [2021-03-24 22:20:18,009 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 419 places, 252 transitions, 7725 flow [2021-03-24 22:20:18,009 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:20:18,009 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 419 places, 252 transitions, 7725 flow [2021-03-24 22:20:18,009 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 419 places, 252 transitions, 7725 flow [2021-03-24 22:20:18,011 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 419 places, 252 transitions, 7725 flow [2021-03-24 22:20:18,092 INFO L129 PetriNetUnfolder]: 0/335 cut-off events. [2021-03-24 22:20:18,092 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:20:18,092 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4071 conditions, 335 events. 0/335 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1042 event pairs, 0 based on Foata normal form. 0/335 useless extension candidates. Maximal degree in co-relation 0. Up to 84 conditions per place. [2021-03-24 22:20:18,123 INFO L142 LiptonReduction]: Number of co-enabled transitions 41500 [2021-03-24 22:20:38,535 INFO L154 LiptonReduction]: Checked pairs total: 17181 [2021-03-24 22:20:38,535 INFO L156 LiptonReduction]: Total number of compositions: 83 [2021-03-24 22:20:38,535 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 20526 [2021-03-24 22:20:38,536 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:20:38,536 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:20:38,536 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:20:38,536 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:20:38,536 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:20:38,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:20:38,536 INFO L82 PathProgramCache]: Analyzing trace with hash 457891, now seen corresponding path program 1 times [2021-03-24 22:20:38,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:20:38,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232622092] [2021-03-24 22:20:38,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:20:38,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:20:38,555 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:20:38,556 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:20:38,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:20:38,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232622092] [2021-03-24 22:20:38,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:20:38,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:20:38,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46931200] [2021-03-24 22:20:38,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:20:38,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:20:38,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:20:38,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:20:38,563 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 337 [2021-03-24 22:20:38,563 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 169 transitions, 7559 flow. Second operand has 3 states, 3 states have (on average 334.6666666666667) internal successors, (1004), 3 states have internal predecessors, (1004), 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) [2021-03-24 22:20:38,563 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:20:38,563 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 337 [2021-03-24 22:20:38,564 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:20:38,618 INFO L129 PetriNetUnfolder]: 0/168 cut-off events. [2021-03-24 22:20:38,618 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:20:38,618 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3906 conditions, 168 events. 0/168 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 173 event pairs, 0 based on Foata normal form. 84/252 useless extension candidates. Maximal degree in co-relation 0. Up to 84 conditions per place. [2021-03-24 22:20:38,618 INFO L132 encePairwiseOnDemand]: 335/337 looper letters, 0 selfloop transitions, 1 changer transitions 0/168 dead transitions. [2021-03-24 22:20:38,618 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 168 transitions, 7559 flow [2021-03-24 22:20:38,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:20:38,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:20:38,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1004 transitions. [2021-03-24 22:20:38,619 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9930761622156281 [2021-03-24 22:20:38,619 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1004 transitions. [2021-03-24 22:20:38,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1004 transitions. [2021-03-24 22:20:38,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:20:38,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1004 transitions. [2021-03-24 22:20:38,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 334.6666666666667) internal successors, (1004), 3 states have internal predecessors, (1004), 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) [2021-03-24 22:20:38,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 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) [2021-03-24 22:20:38,621 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 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) [2021-03-24 22:20:38,621 INFO L185 Difference]: Start difference. First operand has 336 places, 169 transitions, 7559 flow. Second operand 3 states and 1004 transitions. [2021-03-24 22:20:38,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 168 transitions, 7559 flow [2021-03-24 22:20:38,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 168 transitions, 753 flow, removed 3403 selfloop flow, removed 0 redundant places. [2021-03-24 22:20:38,770 INFO L241 Difference]: Finished difference. Result has 337 places, 168 transitions, 753 flow [2021-03-24 22:20:38,770 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=751, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=753, PETRI_PLACES=337, PETRI_TRANSITIONS=168} [2021-03-24 22:20:38,770 INFO L343 CegarLoopForPetriNet]: 336 programPoint places, 1 predicate places. [2021-03-24 22:20:38,770 INFO L480 AbstractCegarLoop]: Abstraction has has 337 places, 168 transitions, 753 flow [2021-03-24 22:20:38,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 334.6666666666667) internal successors, (1004), 3 states have internal predecessors, (1004), 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) [2021-03-24 22:20:38,770 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:20:38,770 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:20:38,770 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2021-03-24 22:20:38,770 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:20:38,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:20:38,771 INFO L82 PathProgramCache]: Analyzing trace with hash 443771644, now seen corresponding path program 1 times [2021-03-24 22:20:38,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:20:38,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845631823] [2021-03-24 22:20:38,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:20:38,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:20:38,787 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:20:38,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:20:38,789 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:20:38,805 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:20:38,805 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:20:38,805 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2021-03-24 22:20:38,805 WARN L342 ceAbstractionStarter]: 83 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:20:38,805 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 84 thread instances. [2021-03-24 22:20:38,918 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:20:38,919 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:20:38,919 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:20:38,919 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:20:38,919 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:20:38,919 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:20:38,919 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:20:38,919 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:20:38,919 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:20:38,919 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:20:38,921 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 426 places, 257 transitions, 7906 flow [2021-03-24 22:20:39,020 INFO L129 PetriNetUnfolder]: 0/509 cut-off events. [2021-03-24 22:20:39,021 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:20:39,021 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4332 conditions, 509 events. 0/509 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1907 event pairs, 0 based on Foata normal form. 0/424 useless extension candidates. Maximal degree in co-relation 0. Up to 85 conditions per place. [2021-03-24 22:20:39,021 INFO L82 GeneralOperation]: Start removeDead. Operand has 426 places, 257 transitions, 7906 flow [2021-03-24 22:20:39,025 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 424 places, 255 transitions, 7902 flow [2021-03-24 22:20:39,025 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:20:39,025 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 424 places, 255 transitions, 7902 flow [2021-03-24 22:20:39,025 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 424 places, 255 transitions, 7902 flow [2021-03-24 22:20:39,027 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 424 places, 255 transitions, 7902 flow [2021-03-24 22:20:39,109 INFO L129 PetriNetUnfolder]: 0/339 cut-off events. [2021-03-24 22:20:39,109 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:20:39,109 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4162 conditions, 339 events. 0/339 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1037 event pairs, 0 based on Foata normal form. 0/339 useless extension candidates. Maximal degree in co-relation 0. Up to 85 conditions per place. [2021-03-24 22:20:39,140 INFO L142 LiptonReduction]: Number of co-enabled transitions 42504 [2021-03-24 22:21:01,465 INFO L154 LiptonReduction]: Checked pairs total: 17598 [2021-03-24 22:21:01,466 INFO L156 LiptonReduction]: Total number of compositions: 84 [2021-03-24 22:21:01,466 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 22441 [2021-03-24 22:21:01,467 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-03-24 22:21:01,467 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:21:01,467 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:21:01,467 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:21:01,467 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:21:01,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:21:01,467 INFO L82 PathProgramCache]: Analyzing trace with hash 468771, now seen corresponding path program 1 times [2021-03-24 22:21:01,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:21:01,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28875720] [2021-03-24 22:21:01,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:21:01,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:21:01,492 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:01,493 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:21:01,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:21:01,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28875720] [2021-03-24 22:21:01,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:21:01,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:21:01,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581948126] [2021-03-24 22:21:01,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:21:01,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:21:01,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:21:01,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:21:01,502 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 338 out of 341 [2021-03-24 22:21:01,502 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 171 transitions, 7734 flow. Second operand has 3 states, 3 states have (on average 338.6666666666667) internal successors, (1016), 3 states have internal predecessors, (1016), 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) [2021-03-24 22:21:01,502 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:21:01,502 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 338 of 341 [2021-03-24 22:21:01,502 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:21:01,585 INFO L129 PetriNetUnfolder]: 0/170 cut-off events. [2021-03-24 22:21:01,585 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:21:01,585 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3995 conditions, 170 events. 0/170 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 140 event pairs, 0 based on Foata normal form. 85/255 useless extension candidates. Maximal degree in co-relation 0. Up to 85 conditions per place. [2021-03-24 22:21:01,586 INFO L132 encePairwiseOnDemand]: 339/341 looper letters, 0 selfloop transitions, 1 changer transitions 0/170 dead transitions. [2021-03-24 22:21:01,586 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 170 transitions, 7734 flow [2021-03-24 22:21:01,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:21:01,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:21:01,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1016 transitions. [2021-03-24 22:21:01,587 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9931573802541545 [2021-03-24 22:21:01,587 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1016 transitions. [2021-03-24 22:21:01,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1016 transitions. [2021-03-24 22:21:01,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:21:01,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1016 transitions. [2021-03-24 22:21:01,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 338.6666666666667) internal successors, (1016), 3 states have internal predecessors, (1016), 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) [2021-03-24 22:21:01,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 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) [2021-03-24 22:21:01,589 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 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) [2021-03-24 22:21:01,589 INFO L185 Difference]: Start difference. First operand has 340 places, 171 transitions, 7734 flow. Second operand 3 states and 1016 transitions. [2021-03-24 22:21:01,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 170 transitions, 7734 flow [2021-03-24 22:21:01,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 170 transitions, 762 flow, removed 3486 selfloop flow, removed 0 redundant places. [2021-03-24 22:21:01,859 INFO L241 Difference]: Finished difference. Result has 341 places, 170 transitions, 762 flow [2021-03-24 22:21:01,859 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=760, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=762, PETRI_PLACES=341, PETRI_TRANSITIONS=170} [2021-03-24 22:21:01,859 INFO L343 CegarLoopForPetriNet]: 340 programPoint places, 1 predicate places. [2021-03-24 22:21:01,859 INFO L480 AbstractCegarLoop]: Abstraction has has 341 places, 170 transitions, 762 flow [2021-03-24 22:21:01,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 338.6666666666667) internal successors, (1016), 3 states have internal predecessors, (1016), 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) [2021-03-24 22:21:01,860 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:21:01,860 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:21:01,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2021-03-24 22:21:01,860 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:21:01,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:21:01,860 INFO L82 PathProgramCache]: Analyzing trace with hash 777326630, now seen corresponding path program 1 times [2021-03-24 22:21:01,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:21:01,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349937266] [2021-03-24 22:21:01,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:21:01,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:21:01,884 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:21:01,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:21:01,886 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:21:01,902 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:21:01,903 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:21:01,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2021-03-24 22:21:01,903 WARN L342 ceAbstractionStarter]: 84 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:21:01,903 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 85 thread instances. [2021-03-24 22:21:02,047 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:21:02,048 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:21:02,048 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:21:02,048 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:21:02,048 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:21:02,048 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:21:02,048 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:21:02,049 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:21:02,049 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:21:02,049 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:21:02,051 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 431 places, 260 transitions, 8085 flow [2021-03-24 22:21:02,210 INFO L129 PetriNetUnfolder]: 0/515 cut-off events. [2021-03-24 22:21:02,211 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:21:02,211 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4426 conditions, 515 events. 0/515 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1911 event pairs, 0 based on Foata normal form. 0/429 useless extension candidates. Maximal degree in co-relation 0. Up to 86 conditions per place. [2021-03-24 22:21:02,211 INFO L82 GeneralOperation]: Start removeDead. Operand has 431 places, 260 transitions, 8085 flow [2021-03-24 22:21:02,214 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 429 places, 258 transitions, 8081 flow [2021-03-24 22:21:02,214 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:21:02,215 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 429 places, 258 transitions, 8081 flow [2021-03-24 22:21:02,215 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 429 places, 258 transitions, 8081 flow [2021-03-24 22:21:02,217 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 429 places, 258 transitions, 8081 flow [2021-03-24 22:21:02,313 INFO L129 PetriNetUnfolder]: 0/343 cut-off events. [2021-03-24 22:21:02,313 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:21:02,313 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4254 conditions, 343 events. 0/343 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1025 event pairs, 0 based on Foata normal form. 0/343 useless extension candidates. Maximal degree in co-relation 0. Up to 86 conditions per place. [2021-03-24 22:21:02,345 INFO L142 LiptonReduction]: Number of co-enabled transitions 43520 [2021-03-24 22:21:25,838 INFO L154 LiptonReduction]: Checked pairs total: 18020 [2021-03-24 22:21:25,839 INFO L156 LiptonReduction]: Total number of compositions: 85 [2021-03-24 22:21:25,839 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 23625 [2021-03-24 22:21:25,840 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:21:25,840 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:21:25,840 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:21:25,840 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:21:25,840 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:21:25,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:21:25,840 INFO L82 PathProgramCache]: Analyzing trace with hash 479779, now seen corresponding path program 1 times [2021-03-24 22:21:25,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:21:25,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578868150] [2021-03-24 22:21:25,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:21:25,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:21:25,862 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:25,863 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:21:25,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:21:25,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578868150] [2021-03-24 22:21:25,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:21:25,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:21:25,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684908946] [2021-03-24 22:21:25,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:21:25,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:21:25,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:21:25,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:21:25,871 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 342 out of 345 [2021-03-24 22:21:25,871 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 173 transitions, 7911 flow. Second operand has 3 states, 3 states have (on average 342.6666666666667) internal successors, (1028), 3 states have internal predecessors, (1028), 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) [2021-03-24 22:21:25,871 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:21:25,871 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 342 of 345 [2021-03-24 22:21:25,871 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:21:25,930 INFO L129 PetriNetUnfolder]: 0/172 cut-off events. [2021-03-24 22:21:25,930 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:21:25,930 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4085 conditions, 172 events. 0/172 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 177 event pairs, 0 based on Foata normal form. 86/258 useless extension candidates. Maximal degree in co-relation 0. Up to 86 conditions per place. [2021-03-24 22:21:25,931 INFO L132 encePairwiseOnDemand]: 343/345 looper letters, 0 selfloop transitions, 1 changer transitions 0/172 dead transitions. [2021-03-24 22:21:25,931 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 172 transitions, 7911 flow [2021-03-24 22:21:25,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:21:25,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:21:25,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1028 transitions. [2021-03-24 22:21:25,932 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9932367149758454 [2021-03-24 22:21:25,932 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1028 transitions. [2021-03-24 22:21:25,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1028 transitions. [2021-03-24 22:21:25,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:21:25,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1028 transitions. [2021-03-24 22:21:25,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 342.6666666666667) internal successors, (1028), 3 states have internal predecessors, (1028), 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) [2021-03-24 22:21:25,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 345.0) internal successors, (1380), 4 states have internal predecessors, (1380), 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) [2021-03-24 22:21:25,933 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 345.0) internal successors, (1380), 4 states have internal predecessors, (1380), 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) [2021-03-24 22:21:25,933 INFO L185 Difference]: Start difference. First operand has 344 places, 173 transitions, 7911 flow. Second operand 3 states and 1028 transitions. [2021-03-24 22:21:25,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 172 transitions, 7911 flow [2021-03-24 22:21:26,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 172 transitions, 771 flow, removed 3570 selfloop flow, removed 0 redundant places. [2021-03-24 22:21:26,133 INFO L241 Difference]: Finished difference. Result has 345 places, 172 transitions, 771 flow [2021-03-24 22:21:26,133 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=345, PETRI_DIFFERENCE_MINUEND_FLOW=769, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=771, PETRI_PLACES=345, PETRI_TRANSITIONS=172} [2021-03-24 22:21:26,133 INFO L343 CegarLoopForPetriNet]: 344 programPoint places, 1 predicate places. [2021-03-24 22:21:26,133 INFO L480 AbstractCegarLoop]: Abstraction has has 345 places, 172 transitions, 771 flow [2021-03-24 22:21:26,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 342.6666666666667) internal successors, (1028), 3 states have internal predecessors, (1028), 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) [2021-03-24 22:21:26,133 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:21:26,133 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:21:26,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2021-03-24 22:21:26,133 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:21:26,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:21:26,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1051655111, now seen corresponding path program 1 times [2021-03-24 22:21:26,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:21:26,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148520858] [2021-03-24 22:21:26,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:21:26,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:21:26,153 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:21:26,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:21:26,155 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:21:26,172 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:21:26,173 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:21:26,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2021-03-24 22:21:26,173 WARN L342 ceAbstractionStarter]: 85 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:21:26,173 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 86 thread instances. [2021-03-24 22:21:26,306 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:21:26,306 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:21:26,307 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:21:26,307 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:21:26,307 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:21:26,307 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:21:26,307 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:21:26,307 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:21:26,307 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:21:26,307 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:21:26,309 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 436 places, 263 transitions, 8266 flow [2021-03-24 22:21:26,434 INFO L129 PetriNetUnfolder]: 0/521 cut-off events. [2021-03-24 22:21:26,434 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:21:26,437 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4521 conditions, 521 events. 0/521 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1924 event pairs, 0 based on Foata normal form. 0/434 useless extension candidates. Maximal degree in co-relation 0. Up to 87 conditions per place. [2021-03-24 22:21:26,437 INFO L82 GeneralOperation]: Start removeDead. Operand has 436 places, 263 transitions, 8266 flow [2021-03-24 22:21:26,440 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 434 places, 261 transitions, 8262 flow [2021-03-24 22:21:26,440 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:21:26,440 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 434 places, 261 transitions, 8262 flow [2021-03-24 22:21:26,440 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 434 places, 261 transitions, 8262 flow [2021-03-24 22:21:26,442 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 434 places, 261 transitions, 8262 flow [2021-03-24 22:21:26,529 INFO L129 PetriNetUnfolder]: 0/347 cut-off events. [2021-03-24 22:21:26,530 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:21:26,530 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4347 conditions, 347 events. 0/347 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1095 event pairs, 0 based on Foata normal form. 0/347 useless extension candidates. Maximal degree in co-relation 0. Up to 87 conditions per place. [2021-03-24 22:21:26,563 INFO L142 LiptonReduction]: Number of co-enabled transitions 44548 [2021-03-24 22:21:51,377 INFO L154 LiptonReduction]: Checked pairs total: 18447 [2021-03-24 22:21:51,377 INFO L156 LiptonReduction]: Total number of compositions: 86 [2021-03-24 22:21:51,378 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 24938 [2021-03-24 22:21:51,379 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:21:51,379 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:21:51,379 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:21:51,379 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:21:51,379 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:21:51,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:21:51,379 INFO L82 PathProgramCache]: Analyzing trace with hash 490915, now seen corresponding path program 1 times [2021-03-24 22:21:51,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:21:51,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516564394] [2021-03-24 22:21:51,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:21:51,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:21:51,400 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:21:51,401 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:21:51,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:21:51,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516564394] [2021-03-24 22:21:51,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:21:51,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:21:51,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382881530] [2021-03-24 22:21:51,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:21:51,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:21:51,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:21:51,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:21:51,409 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 346 out of 349 [2021-03-24 22:21:51,409 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 175 transitions, 8090 flow. Second operand has 3 states, 3 states have (on average 346.6666666666667) internal successors, (1040), 3 states have internal predecessors, (1040), 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) [2021-03-24 22:21:51,409 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:21:51,409 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 346 of 349 [2021-03-24 22:21:51,409 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:21:51,468 INFO L129 PetriNetUnfolder]: 0/174 cut-off events. [2021-03-24 22:21:51,469 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:21:51,469 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4176 conditions, 174 events. 0/174 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 182 event pairs, 0 based on Foata normal form. 87/261 useless extension candidates. Maximal degree in co-relation 0. Up to 87 conditions per place. [2021-03-24 22:21:51,469 INFO L132 encePairwiseOnDemand]: 347/349 looper letters, 0 selfloop transitions, 1 changer transitions 0/174 dead transitions. [2021-03-24 22:21:51,469 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 174 transitions, 8090 flow [2021-03-24 22:21:51,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:21:51,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:21:51,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1040 transitions. [2021-03-24 22:21:51,470 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9933142311365807 [2021-03-24 22:21:51,470 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1040 transitions. [2021-03-24 22:21:51,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1040 transitions. [2021-03-24 22:21:51,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:21:51,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1040 transitions. [2021-03-24 22:21:51,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 346.6666666666667) internal successors, (1040), 3 states have internal predecessors, (1040), 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) [2021-03-24 22:21:51,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 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) [2021-03-24 22:21:51,473 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 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) [2021-03-24 22:21:51,473 INFO L185 Difference]: Start difference. First operand has 348 places, 175 transitions, 8090 flow. Second operand 3 states and 1040 transitions. [2021-03-24 22:21:51,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 174 transitions, 8090 flow [2021-03-24 22:21:51,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 174 transitions, 780 flow, removed 3655 selfloop flow, removed 0 redundant places. [2021-03-24 22:21:51,681 INFO L241 Difference]: Finished difference. Result has 349 places, 174 transitions, 780 flow [2021-03-24 22:21:51,681 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=778, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=780, PETRI_PLACES=349, PETRI_TRANSITIONS=174} [2021-03-24 22:21:51,682 INFO L343 CegarLoopForPetriNet]: 348 programPoint places, 1 predicate places. [2021-03-24 22:21:51,682 INFO L480 AbstractCegarLoop]: Abstraction has has 349 places, 174 transitions, 780 flow [2021-03-24 22:21:51,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 346.6666666666667) internal successors, (1040), 3 states have internal predecessors, (1040), 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) [2021-03-24 22:21:51,682 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:21:51,682 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:21:51,682 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2021-03-24 22:21:51,682 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:21:51,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:21:51,682 INFO L82 PathProgramCache]: Analyzing trace with hash 466958825, now seen corresponding path program 1 times [2021-03-24 22:21:51,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:21:51,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123200371] [2021-03-24 22:21:51,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:21:51,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:21:51,701 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:21:51,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:21:51,703 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:21:51,720 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:21:51,721 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:21:51,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2021-03-24 22:21:51,721 WARN L342 ceAbstractionStarter]: 86 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:21:51,721 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 87 thread instances. [2021-03-24 22:21:51,873 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:21:51,874 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:21:51,874 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:21:51,874 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:21:51,874 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:21:51,874 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:21:51,874 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:21:51,874 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:21:51,874 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:21:51,875 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:21:51,876 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 441 places, 266 transitions, 8449 flow [2021-03-24 22:21:51,985 INFO L129 PetriNetUnfolder]: 0/527 cut-off events. [2021-03-24 22:21:51,985 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:21:51,985 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4617 conditions, 527 events. 0/527 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1944 event pairs, 0 based on Foata normal form. 0/439 useless extension candidates. Maximal degree in co-relation 0. Up to 88 conditions per place. [2021-03-24 22:21:51,986 INFO L82 GeneralOperation]: Start removeDead. Operand has 441 places, 266 transitions, 8449 flow [2021-03-24 22:21:51,988 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 439 places, 264 transitions, 8445 flow [2021-03-24 22:21:51,988 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:21:51,988 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 439 places, 264 transitions, 8445 flow [2021-03-24 22:21:51,988 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 439 places, 264 transitions, 8445 flow [2021-03-24 22:21:51,990 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 439 places, 264 transitions, 8445 flow [2021-03-24 22:21:52,078 INFO L129 PetriNetUnfolder]: 0/351 cut-off events. [2021-03-24 22:21:52,078 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:21:52,079 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4441 conditions, 351 events. 0/351 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 983 event pairs, 0 based on Foata normal form. 0/351 useless extension candidates. Maximal degree in co-relation 0. Up to 88 conditions per place. [2021-03-24 22:21:52,112 INFO L142 LiptonReduction]: Number of co-enabled transitions 45588 [2021-03-24 22:22:18,651 INFO L154 LiptonReduction]: Checked pairs total: 18879 [2021-03-24 22:22:18,651 INFO L156 LiptonReduction]: Total number of compositions: 87 [2021-03-24 22:22:18,652 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 26664 [2021-03-24 22:22:18,652 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:22:18,652 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:22:18,652 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:22:18,653 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:22:18,653 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:22:18,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:22:18,653 INFO L82 PathProgramCache]: Analyzing trace with hash 502179, now seen corresponding path program 1 times [2021-03-24 22:22:18,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:22:18,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252534376] [2021-03-24 22:22:18,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:22:18,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:22:18,672 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:22:18,673 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:22:18,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:22:18,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252534376] [2021-03-24 22:22:18,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:22:18,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:22:18,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400080083] [2021-03-24 22:22:18,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:22:18,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:22:18,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:22:18,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:22:18,680 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 350 out of 353 [2021-03-24 22:22:18,680 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 177 transitions, 8271 flow. Second operand has 3 states, 3 states have (on average 350.6666666666667) internal successors, (1052), 3 states have internal predecessors, (1052), 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) [2021-03-24 22:22:18,680 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:22:18,680 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 350 of 353 [2021-03-24 22:22:18,680 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:22:18,740 INFO L129 PetriNetUnfolder]: 0/176 cut-off events. [2021-03-24 22:22:18,740 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:22:18,740 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4268 conditions, 176 events. 0/176 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 177 event pairs, 0 based on Foata normal form. 88/264 useless extension candidates. Maximal degree in co-relation 0. Up to 88 conditions per place. [2021-03-24 22:22:18,741 INFO L132 encePairwiseOnDemand]: 351/353 looper letters, 0 selfloop transitions, 1 changer transitions 0/176 dead transitions. [2021-03-24 22:22:18,741 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 176 transitions, 8271 flow [2021-03-24 22:22:18,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:22:18,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:22:18,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1052 transitions. [2021-03-24 22:22:18,742 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9933899905571294 [2021-03-24 22:22:18,742 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1052 transitions. [2021-03-24 22:22:18,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1052 transitions. [2021-03-24 22:22:18,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:22:18,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1052 transitions. [2021-03-24 22:22:18,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 350.6666666666667) internal successors, (1052), 3 states have internal predecessors, (1052), 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) [2021-03-24 22:22:18,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 353.0) internal successors, (1412), 4 states have internal predecessors, (1412), 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) [2021-03-24 22:22:18,743 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 353.0) internal successors, (1412), 4 states have internal predecessors, (1412), 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) [2021-03-24 22:22:18,743 INFO L185 Difference]: Start difference. First operand has 352 places, 177 transitions, 8271 flow. Second operand 3 states and 1052 transitions. [2021-03-24 22:22:18,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 176 transitions, 8271 flow [2021-03-24 22:22:18,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 176 transitions, 789 flow, removed 3741 selfloop flow, removed 0 redundant places. [2021-03-24 22:22:18,963 INFO L241 Difference]: Finished difference. Result has 353 places, 176 transitions, 789 flow [2021-03-24 22:22:18,963 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=787, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=789, PETRI_PLACES=353, PETRI_TRANSITIONS=176} [2021-03-24 22:22:18,963 INFO L343 CegarLoopForPetriNet]: 352 programPoint places, 1 predicate places. [2021-03-24 22:22:18,963 INFO L480 AbstractCegarLoop]: Abstraction has has 353 places, 176 transitions, 789 flow [2021-03-24 22:22:18,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 350.6666666666667) internal successors, (1052), 3 states have internal predecessors, (1052), 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) [2021-03-24 22:22:18,963 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:22:18,963 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:22:18,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2021-03-24 22:22:18,963 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:22:18,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:22:18,964 INFO L82 PathProgramCache]: Analyzing trace with hash -307648862, now seen corresponding path program 1 times [2021-03-24 22:22:18,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:22:18,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292804162] [2021-03-24 22:22:18,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:22:18,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:22:18,985 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:22:18,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:22:18,987 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:22:19,001 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:22:19,001 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:22:19,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2021-03-24 22:22:19,001 WARN L342 ceAbstractionStarter]: 87 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:22:19,002 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 88 thread instances. [2021-03-24 22:22:19,128 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:22:19,128 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:22:19,128 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:22:19,128 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:22:19,128 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:22:19,128 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:22:19,128 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:22:19,128 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:22:19,128 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:22:19,128 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:22:19,130 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 446 places, 269 transitions, 8634 flow [2021-03-24 22:22:19,246 INFO L129 PetriNetUnfolder]: 0/533 cut-off events. [2021-03-24 22:22:19,246 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:22:19,247 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4714 conditions, 533 events. 0/533 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1958 event pairs, 0 based on Foata normal form. 0/444 useless extension candidates. Maximal degree in co-relation 0. Up to 89 conditions per place. [2021-03-24 22:22:19,247 INFO L82 GeneralOperation]: Start removeDead. Operand has 446 places, 269 transitions, 8634 flow [2021-03-24 22:22:19,249 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 444 places, 267 transitions, 8630 flow [2021-03-24 22:22:19,249 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:22:19,250 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 444 places, 267 transitions, 8630 flow [2021-03-24 22:22:19,250 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 444 places, 267 transitions, 8630 flow [2021-03-24 22:22:19,252 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 444 places, 267 transitions, 8630 flow [2021-03-24 22:22:19,342 INFO L129 PetriNetUnfolder]: 0/355 cut-off events. [2021-03-24 22:22:19,342 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:22:19,342 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4536 conditions, 355 events. 0/355 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1148 event pairs, 0 based on Foata normal form. 0/355 useless extension candidates. Maximal degree in co-relation 0. Up to 89 conditions per place. [2021-03-24 22:22:19,377 INFO L142 LiptonReduction]: Number of co-enabled transitions 46640 [2021-03-24 22:22:47,807 INFO L154 LiptonReduction]: Checked pairs total: 19316 [2021-03-24 22:22:47,807 INFO L156 LiptonReduction]: Total number of compositions: 88 [2021-03-24 22:22:47,808 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 28559 [2021-03-24 22:22:47,809 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:22:47,809 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:22:47,809 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:22:47,809 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:22:47,809 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:22:47,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:22:47,809 INFO L82 PathProgramCache]: Analyzing trace with hash 513571, now seen corresponding path program 1 times [2021-03-24 22:22:47,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:22:47,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129624586] [2021-03-24 22:22:47,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:22:47,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:22:47,829 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:22:47,831 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:22:47,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:22:47,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129624586] [2021-03-24 22:22:47,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:22:47,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:22:47,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313432713] [2021-03-24 22:22:47,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:22:47,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:22:47,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:22:47,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:22:47,838 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 354 out of 357 [2021-03-24 22:22:47,838 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 179 transitions, 8454 flow. Second operand has 3 states, 3 states have (on average 354.6666666666667) internal successors, (1064), 3 states have internal predecessors, (1064), 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) [2021-03-24 22:22:47,838 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:22:47,838 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 354 of 357 [2021-03-24 22:22:47,838 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:22:47,899 INFO L129 PetriNetUnfolder]: 0/178 cut-off events. [2021-03-24 22:22:47,899 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:22:47,899 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4361 conditions, 178 events. 0/178 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 190 event pairs, 0 based on Foata normal form. 89/267 useless extension candidates. Maximal degree in co-relation 0. Up to 89 conditions per place. [2021-03-24 22:22:47,900 INFO L132 encePairwiseOnDemand]: 355/357 looper letters, 0 selfloop transitions, 1 changer transitions 0/178 dead transitions. [2021-03-24 22:22:47,900 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 178 transitions, 8454 flow [2021-03-24 22:22:47,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:22:47,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:22:47,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1064 transitions. [2021-03-24 22:22:47,901 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9934640522875817 [2021-03-24 22:22:47,901 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1064 transitions. [2021-03-24 22:22:47,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1064 transitions. [2021-03-24 22:22:47,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:22:47,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1064 transitions. [2021-03-24 22:22:47,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 354.6666666666667) internal successors, (1064), 3 states have internal predecessors, (1064), 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) [2021-03-24 22:22:47,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 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) [2021-03-24 22:22:47,902 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 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) [2021-03-24 22:22:47,902 INFO L185 Difference]: Start difference. First operand has 356 places, 179 transitions, 8454 flow. Second operand 3 states and 1064 transitions. [2021-03-24 22:22:47,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 178 transitions, 8454 flow [2021-03-24 22:22:48,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 178 transitions, 798 flow, removed 3828 selfloop flow, removed 0 redundant places. [2021-03-24 22:22:48,139 INFO L241 Difference]: Finished difference. Result has 357 places, 178 transitions, 798 flow [2021-03-24 22:22:48,139 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=796, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=798, PETRI_PLACES=357, PETRI_TRANSITIONS=178} [2021-03-24 22:22:48,139 INFO L343 CegarLoopForPetriNet]: 356 programPoint places, 1 predicate places. [2021-03-24 22:22:48,139 INFO L480 AbstractCegarLoop]: Abstraction has has 357 places, 178 transitions, 798 flow [2021-03-24 22:22:48,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 354.6666666666667) internal successors, (1064), 3 states have internal predecessors, (1064), 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) [2021-03-24 22:22:48,139 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:22:48,139 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:22:48,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2021-03-24 22:22:48,139 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:22:48,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:22:48,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1917844908, now seen corresponding path program 1 times [2021-03-24 22:22:48,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:22:48,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925339568] [2021-03-24 22:22:48,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:22:48,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:22:48,159 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:22:48,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:22:48,161 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:22:48,177 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:22:48,178 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:22:48,178 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2021-03-24 22:22:48,178 WARN L342 ceAbstractionStarter]: 88 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:22:48,178 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 89 thread instances. [2021-03-24 22:22:48,320 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:22:48,320 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:22:48,320 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:22:48,320 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:22:48,320 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:22:48,320 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:22:48,320 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:22:48,321 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:22:48,321 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:22:48,321 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:22:48,322 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 451 places, 272 transitions, 8821 flow [2021-03-24 22:22:48,437 INFO L129 PetriNetUnfolder]: 0/539 cut-off events. [2021-03-24 22:22:48,437 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:22:48,437 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4812 conditions, 539 events. 0/539 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2051 event pairs, 0 based on Foata normal form. 0/449 useless extension candidates. Maximal degree in co-relation 0. Up to 90 conditions per place. [2021-03-24 22:22:48,437 INFO L82 GeneralOperation]: Start removeDead. Operand has 451 places, 272 transitions, 8821 flow [2021-03-24 22:22:48,440 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 449 places, 270 transitions, 8817 flow [2021-03-24 22:22:48,440 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:22:48,440 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 449 places, 270 transitions, 8817 flow [2021-03-24 22:22:48,440 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 449 places, 270 transitions, 8817 flow [2021-03-24 22:22:48,442 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 449 places, 270 transitions, 8817 flow [2021-03-24 22:22:48,535 INFO L129 PetriNetUnfolder]: 0/359 cut-off events. [2021-03-24 22:22:48,535 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:22:48,535 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4632 conditions, 359 events. 0/359 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1034 event pairs, 0 based on Foata normal form. 0/359 useless extension candidates. Maximal degree in co-relation 0. Up to 90 conditions per place. [2021-03-24 22:22:48,571 INFO L142 LiptonReduction]: Number of co-enabled transitions 47704 [2021-03-24 22:23:18,637 INFO L154 LiptonReduction]: Checked pairs total: 19758 [2021-03-24 22:23:18,638 INFO L156 LiptonReduction]: Total number of compositions: 89 [2021-03-24 22:23:18,638 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 30198 [2021-03-24 22:23:18,639 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:23:18,639 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:23:18,639 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:23:18,639 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:23:18,639 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:23:18,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:23:18,639 INFO L82 PathProgramCache]: Analyzing trace with hash 525091, now seen corresponding path program 1 times [2021-03-24 22:23:18,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:23:18,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053191604] [2021-03-24 22:23:18,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:23:18,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:23:18,665 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:23:18,666 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:23:18,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:23:18,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053191604] [2021-03-24 22:23:18,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:23:18,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:23:18,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974168888] [2021-03-24 22:23:18,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:23:18,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:23:18,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:23:18,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:23:18,676 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 358 out of 361 [2021-03-24 22:23:18,676 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 181 transitions, 8639 flow. Second operand has 3 states, 3 states have (on average 358.6666666666667) internal successors, (1076), 3 states have internal predecessors, (1076), 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) [2021-03-24 22:23:18,676 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:23:18,677 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 358 of 361 [2021-03-24 22:23:18,677 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:23:18,765 INFO L129 PetriNetUnfolder]: 0/180 cut-off events. [2021-03-24 22:23:18,765 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:23:18,765 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4455 conditions, 180 events. 0/180 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 179 event pairs, 0 based on Foata normal form. 90/270 useless extension candidates. Maximal degree in co-relation 0. Up to 90 conditions per place. [2021-03-24 22:23:18,766 INFO L132 encePairwiseOnDemand]: 359/361 looper letters, 0 selfloop transitions, 1 changer transitions 0/180 dead transitions. [2021-03-24 22:23:18,766 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 180 transitions, 8639 flow [2021-03-24 22:23:18,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:23:18,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:23:18,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1076 transitions. [2021-03-24 22:23:18,767 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9935364727608494 [2021-03-24 22:23:18,767 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1076 transitions. [2021-03-24 22:23:18,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1076 transitions. [2021-03-24 22:23:18,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:23:18,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1076 transitions. [2021-03-24 22:23:18,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 358.6666666666667) internal successors, (1076), 3 states have internal predecessors, (1076), 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) [2021-03-24 22:23:18,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 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) [2021-03-24 22:23:18,769 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 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) [2021-03-24 22:23:18,769 INFO L185 Difference]: Start difference. First operand has 360 places, 181 transitions, 8639 flow. Second operand 3 states and 1076 transitions. [2021-03-24 22:23:18,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 180 transitions, 8639 flow [2021-03-24 22:23:19,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 180 transitions, 807 flow, removed 3916 selfloop flow, removed 0 redundant places. [2021-03-24 22:23:19,148 INFO L241 Difference]: Finished difference. Result has 361 places, 180 transitions, 807 flow [2021-03-24 22:23:19,148 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=807, PETRI_PLACES=361, PETRI_TRANSITIONS=180} [2021-03-24 22:23:19,149 INFO L343 CegarLoopForPetriNet]: 360 programPoint places, 1 predicate places. [2021-03-24 22:23:19,149 INFO L480 AbstractCegarLoop]: Abstraction has has 361 places, 180 transitions, 807 flow [2021-03-24 22:23:19,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 358.6666666666667) internal successors, (1076), 3 states have internal predecessors, (1076), 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) [2021-03-24 22:23:19,149 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:23:19,149 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:23:19,149 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2021-03-24 22:23:19,149 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:23:19,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:23:19,149 INFO L82 PathProgramCache]: Analyzing trace with hash -53025395, now seen corresponding path program 1 times [2021-03-24 22:23:19,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:23:19,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795669590] [2021-03-24 22:23:19,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:23:19,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:23:19,174 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:23:19,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:23:19,176 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:23:19,195 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:23:19,195 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:23:19,195 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2021-03-24 22:23:19,195 WARN L342 ceAbstractionStarter]: 89 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:23:19,195 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 90 thread instances. [2021-03-24 22:23:19,377 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:23:19,378 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:23:19,378 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:23:19,378 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:23:19,378 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:23:19,378 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:23:19,378 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:23:19,378 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:23:19,378 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:23:19,378 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:23:19,380 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 456 places, 275 transitions, 9010 flow [2021-03-24 22:23:19,497 INFO L129 PetriNetUnfolder]: 0/545 cut-off events. [2021-03-24 22:23:19,497 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:23:19,497 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4911 conditions, 545 events. 0/545 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2084 event pairs, 0 based on Foata normal form. 0/454 useless extension candidates. Maximal degree in co-relation 0. Up to 91 conditions per place. [2021-03-24 22:23:19,497 INFO L82 GeneralOperation]: Start removeDead. Operand has 456 places, 275 transitions, 9010 flow [2021-03-24 22:23:19,500 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 454 places, 273 transitions, 9006 flow [2021-03-24 22:23:19,500 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:23:19,500 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 454 places, 273 transitions, 9006 flow [2021-03-24 22:23:19,500 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 454 places, 273 transitions, 9006 flow [2021-03-24 22:23:19,502 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 454 places, 273 transitions, 9006 flow [2021-03-24 22:23:19,596 INFO L129 PetriNetUnfolder]: 0/363 cut-off events. [2021-03-24 22:23:19,597 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:23:19,597 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4729 conditions, 363 events. 0/363 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1007 event pairs, 0 based on Foata normal form. 0/363 useless extension candidates. Maximal degree in co-relation 0. Up to 91 conditions per place. [2021-03-24 22:23:19,633 INFO L142 LiptonReduction]: Number of co-enabled transitions 48780 [2021-03-24 22:23:52,579 INFO L154 LiptonReduction]: Checked pairs total: 20205 [2021-03-24 22:23:52,579 INFO L156 LiptonReduction]: Total number of compositions: 90 [2021-03-24 22:23:52,580 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 33080 [2021-03-24 22:23:52,580 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:23:52,580 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:23:52,581 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:23:52,581 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:23:52,581 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:23:52,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:23:52,581 INFO L82 PathProgramCache]: Analyzing trace with hash 536739, now seen corresponding path program 1 times [2021-03-24 22:23:52,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:23:52,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740620968] [2021-03-24 22:23:52,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:23:52,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:23:52,601 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:23:52,602 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:23:52,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:23:52,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740620968] [2021-03-24 22:23:52,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:23:52,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:23:52,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920758547] [2021-03-24 22:23:52,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:23:52,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:23:52,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:23:52,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:23:52,610 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 362 out of 365 [2021-03-24 22:23:52,611 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 183 transitions, 8826 flow. Second operand has 3 states, 3 states have (on average 362.6666666666667) internal successors, (1088), 3 states have internal predecessors, (1088), 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) [2021-03-24 22:23:52,611 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:23:52,611 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 362 of 365 [2021-03-24 22:23:52,611 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:23:52,674 INFO L129 PetriNetUnfolder]: 0/182 cut-off events. [2021-03-24 22:23:52,674 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:23:52,675 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4550 conditions, 182 events. 0/182 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 156 event pairs, 0 based on Foata normal form. 91/273 useless extension candidates. Maximal degree in co-relation 0. Up to 91 conditions per place. [2021-03-24 22:23:52,675 INFO L132 encePairwiseOnDemand]: 363/365 looper letters, 0 selfloop transitions, 1 changer transitions 0/182 dead transitions. [2021-03-24 22:23:52,675 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 182 transitions, 8826 flow [2021-03-24 22:23:52,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:23:52,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:23:52,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1088 transitions. [2021-03-24 22:23:52,676 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.993607305936073 [2021-03-24 22:23:52,676 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1088 transitions. [2021-03-24 22:23:52,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1088 transitions. [2021-03-24 22:23:52,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:23:52,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1088 transitions. [2021-03-24 22:23:52,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 362.6666666666667) internal successors, (1088), 3 states have internal predecessors, (1088), 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) [2021-03-24 22:23:52,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 365.0) internal successors, (1460), 4 states have internal predecessors, (1460), 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) [2021-03-24 22:23:52,677 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 365.0) internal successors, (1460), 4 states have internal predecessors, (1460), 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) [2021-03-24 22:23:52,677 INFO L185 Difference]: Start difference. First operand has 364 places, 183 transitions, 8826 flow. Second operand 3 states and 1088 transitions. [2021-03-24 22:23:52,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 182 transitions, 8826 flow [2021-03-24 22:23:52,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 182 transitions, 816 flow, removed 4005 selfloop flow, removed 0 redundant places. [2021-03-24 22:23:52,935 INFO L241 Difference]: Finished difference. Result has 365 places, 182 transitions, 816 flow [2021-03-24 22:23:52,936 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=814, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=816, PETRI_PLACES=365, PETRI_TRANSITIONS=182} [2021-03-24 22:23:52,936 INFO L343 CegarLoopForPetriNet]: 364 programPoint places, 1 predicate places. [2021-03-24 22:23:52,936 INFO L480 AbstractCegarLoop]: Abstraction has has 365 places, 182 transitions, 816 flow [2021-03-24 22:23:52,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 362.6666666666667) internal successors, (1088), 3 states have internal predecessors, (1088), 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) [2021-03-24 22:23:52,936 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:23:52,936 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:23:52,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2021-03-24 22:23:52,936 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:23:52,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:23:52,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1850711697, now seen corresponding path program 1 times [2021-03-24 22:23:52,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:23:52,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945176494] [2021-03-24 22:23:52,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:23:52,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:23:52,956 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:23:52,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:23:52,959 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:23:52,977 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:23:52,977 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:23:52,978 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2021-03-24 22:23:52,978 WARN L342 ceAbstractionStarter]: 90 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:23:52,978 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 91 thread instances. [2021-03-24 22:23:53,132 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:23:53,133 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:23:53,133 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:23:53,133 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:23:53,133 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:23:53,133 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:23:53,133 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:23:53,133 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:23:53,133 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:23:53,133 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:23:53,135 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 461 places, 278 transitions, 9201 flow [2021-03-24 22:23:53,256 INFO L129 PetriNetUnfolder]: 0/551 cut-off events. [2021-03-24 22:23:53,256 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:23:53,256 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5011 conditions, 551 events. 0/551 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1985 event pairs, 0 based on Foata normal form. 0/459 useless extension candidates. Maximal degree in co-relation 0. Up to 92 conditions per place. [2021-03-24 22:23:53,256 INFO L82 GeneralOperation]: Start removeDead. Operand has 461 places, 278 transitions, 9201 flow [2021-03-24 22:23:53,259 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 459 places, 276 transitions, 9197 flow [2021-03-24 22:23:53,259 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:23:53,259 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 459 places, 276 transitions, 9197 flow [2021-03-24 22:23:53,259 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 459 places, 276 transitions, 9197 flow [2021-03-24 22:23:53,261 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 459 places, 276 transitions, 9197 flow [2021-03-24 22:23:53,358 INFO L129 PetriNetUnfolder]: 0/367 cut-off events. [2021-03-24 22:23:53,359 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:23:53,359 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4827 conditions, 367 events. 0/367 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 979 event pairs, 0 based on Foata normal form. 0/367 useless extension candidates. Maximal degree in co-relation 0. Up to 92 conditions per place. [2021-03-24 22:23:53,396 INFO L142 LiptonReduction]: Number of co-enabled transitions 49868 [2021-03-24 22:24:25,771 INFO L154 LiptonReduction]: Checked pairs total: 20657 [2021-03-24 22:24:25,772 INFO L156 LiptonReduction]: Total number of compositions: 91 [2021-03-24 22:24:25,772 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 32513 [2021-03-24 22:24:25,773 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-03-24 22:24:25,773 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:24:25,773 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:24:25,773 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:24:25,773 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:24:25,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:24:25,773 INFO L82 PathProgramCache]: Analyzing trace with hash 548515, now seen corresponding path program 1 times [2021-03-24 22:24:25,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:24:25,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501204172] [2021-03-24 22:24:25,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:24:25,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:24:25,795 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:24:25,796 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:24:25,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:24:25,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501204172] [2021-03-24 22:24:25,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:24:25,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:24:25,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972393782] [2021-03-24 22:24:25,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:24:25,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:24:25,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:24:25,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:24:25,804 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 366 out of 369 [2021-03-24 22:24:25,805 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 185 transitions, 9015 flow. Second operand has 3 states, 3 states have (on average 366.6666666666667) internal successors, (1100), 3 states have internal predecessors, (1100), 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) [2021-03-24 22:24:25,805 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:24:25,805 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 366 of 369 [2021-03-24 22:24:25,805 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:24:25,871 INFO L129 PetriNetUnfolder]: 0/184 cut-off events. [2021-03-24 22:24:25,871 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:24:25,871 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4646 conditions, 184 events. 0/184 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 189 event pairs, 0 based on Foata normal form. 92/276 useless extension candidates. Maximal degree in co-relation 0. Up to 92 conditions per place. [2021-03-24 22:24:25,871 INFO L132 encePairwiseOnDemand]: 367/369 looper letters, 0 selfloop transitions, 1 changer transitions 0/184 dead transitions. [2021-03-24 22:24:25,871 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 184 transitions, 9015 flow [2021-03-24 22:24:25,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:24:25,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:24:25,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1100 transitions. [2021-03-24 22:24:25,872 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.993676603432701 [2021-03-24 22:24:25,872 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1100 transitions. [2021-03-24 22:24:25,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1100 transitions. [2021-03-24 22:24:25,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:24:25,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1100 transitions. [2021-03-24 22:24:25,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 366.6666666666667) internal successors, (1100), 3 states have internal predecessors, (1100), 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) [2021-03-24 22:24:25,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 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) [2021-03-24 22:24:25,874 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 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) [2021-03-24 22:24:25,874 INFO L185 Difference]: Start difference. First operand has 368 places, 185 transitions, 9015 flow. Second operand 3 states and 1100 transitions. [2021-03-24 22:24:25,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 184 transitions, 9015 flow [2021-03-24 22:24:26,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 184 transitions, 825 flow, removed 4095 selfloop flow, removed 0 redundant places. [2021-03-24 22:24:26,142 INFO L241 Difference]: Finished difference. Result has 369 places, 184 transitions, 825 flow [2021-03-24 22:24:26,142 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=823, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=825, PETRI_PLACES=369, PETRI_TRANSITIONS=184} [2021-03-24 22:24:26,142 INFO L343 CegarLoopForPetriNet]: 368 programPoint places, 1 predicate places. [2021-03-24 22:24:26,142 INFO L480 AbstractCegarLoop]: Abstraction has has 369 places, 184 transitions, 825 flow [2021-03-24 22:24:26,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 366.6666666666667) internal successors, (1100), 3 states have internal predecessors, (1100), 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) [2021-03-24 22:24:26,142 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:24:26,142 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:24:26,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2021-03-24 22:24:26,143 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:24:26,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:24:26,143 INFO L82 PathProgramCache]: Analyzing trace with hash 815608456, now seen corresponding path program 1 times [2021-03-24 22:24:26,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:24:26,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471328804] [2021-03-24 22:24:26,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:24:26,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:24:26,162 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:24:26,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:24:26,165 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:24:26,184 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:24:26,185 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:24:26,185 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2021-03-24 22:24:26,185 WARN L342 ceAbstractionStarter]: 91 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:24:26,185 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 92 thread instances. [2021-03-24 22:24:26,343 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:24:26,343 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:24:26,344 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:24:26,344 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:24:26,344 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:24:26,344 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:24:26,344 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:24:26,344 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:24:26,344 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:24:26,344 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:24:26,346 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 466 places, 281 transitions, 9394 flow [2021-03-24 22:24:26,471 INFO L129 PetriNetUnfolder]: 0/557 cut-off events. [2021-03-24 22:24:26,471 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:24:26,471 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5112 conditions, 557 events. 0/557 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2112 event pairs, 0 based on Foata normal form. 0/464 useless extension candidates. Maximal degree in co-relation 0. Up to 93 conditions per place. [2021-03-24 22:24:26,471 INFO L82 GeneralOperation]: Start removeDead. Operand has 466 places, 281 transitions, 9394 flow [2021-03-24 22:24:26,474 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 464 places, 279 transitions, 9390 flow [2021-03-24 22:24:26,474 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:24:26,474 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 464 places, 279 transitions, 9390 flow [2021-03-24 22:24:26,474 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 464 places, 279 transitions, 9390 flow [2021-03-24 22:24:26,476 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 464 places, 279 transitions, 9390 flow [2021-03-24 22:24:26,579 INFO L129 PetriNetUnfolder]: 0/371 cut-off events. [2021-03-24 22:24:26,579 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:24:26,580 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4926 conditions, 371 events. 0/371 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1140 event pairs, 0 based on Foata normal form. 0/371 useless extension candidates. Maximal degree in co-relation 0. Up to 93 conditions per place. [2021-03-24 22:24:26,619 INFO L142 LiptonReduction]: Number of co-enabled transitions 50968 [2021-03-24 22:25:03,445 INFO L154 LiptonReduction]: Checked pairs total: 21114 [2021-03-24 22:25:03,445 INFO L156 LiptonReduction]: Total number of compositions: 92 [2021-03-24 22:25:03,446 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 36972 [2021-03-24 22:25:03,446 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-03-24 22:25:03,446 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:25:03,447 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:25:03,447 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:25:03,447 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:25:03,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:25:03,447 INFO L82 PathProgramCache]: Analyzing trace with hash 560419, now seen corresponding path program 1 times [2021-03-24 22:25:03,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:25:03,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101483602] [2021-03-24 22:25:03,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:25:03,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:25:03,471 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:25:03,473 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:25:03,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:25:03,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101483602] [2021-03-24 22:25:03,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:25:03,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:25:03,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38692024] [2021-03-24 22:25:03,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:25:03,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:25:03,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:25:03,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:25:03,482 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 370 out of 373 [2021-03-24 22:25:03,482 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 187 transitions, 9206 flow. Second operand has 3 states, 3 states have (on average 370.6666666666667) internal successors, (1112), 3 states have internal predecessors, (1112), 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) [2021-03-24 22:25:03,482 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:25:03,482 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 370 of 373 [2021-03-24 22:25:03,482 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:25:03,554 INFO L129 PetriNetUnfolder]: 0/186 cut-off events. [2021-03-24 22:25:03,554 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:25:03,554 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4743 conditions, 186 events. 0/186 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 228 event pairs, 0 based on Foata normal form. 93/279 useless extension candidates. Maximal degree in co-relation 0. Up to 93 conditions per place. [2021-03-24 22:25:03,554 INFO L132 encePairwiseOnDemand]: 371/373 looper letters, 0 selfloop transitions, 1 changer transitions 0/186 dead transitions. [2021-03-24 22:25:03,554 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 186 transitions, 9206 flow [2021-03-24 22:25:03,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:25:03,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:25:03,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1112 transitions. [2021-03-24 22:25:03,555 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9937444146559428 [2021-03-24 22:25:03,555 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1112 transitions. [2021-03-24 22:25:03,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1112 transitions. [2021-03-24 22:25:03,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:25:03,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1112 transitions. [2021-03-24 22:25:03,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 370.6666666666667) internal successors, (1112), 3 states have internal predecessors, (1112), 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) [2021-03-24 22:25:03,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 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) [2021-03-24 22:25:03,557 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 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) [2021-03-24 22:25:03,557 INFO L185 Difference]: Start difference. First operand has 372 places, 187 transitions, 9206 flow. Second operand 3 states and 1112 transitions. [2021-03-24 22:25:03,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 186 transitions, 9206 flow [2021-03-24 22:25:03,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 186 transitions, 834 flow, removed 4186 selfloop flow, removed 0 redundant places. [2021-03-24 22:25:03,840 INFO L241 Difference]: Finished difference. Result has 373 places, 186 transitions, 834 flow [2021-03-24 22:25:03,840 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=832, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=834, PETRI_PLACES=373, PETRI_TRANSITIONS=186} [2021-03-24 22:25:03,840 INFO L343 CegarLoopForPetriNet]: 372 programPoint places, 1 predicate places. [2021-03-24 22:25:03,840 INFO L480 AbstractCegarLoop]: Abstraction has has 373 places, 186 transitions, 834 flow [2021-03-24 22:25:03,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 370.6666666666667) internal successors, (1112), 3 states have internal predecessors, (1112), 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) [2021-03-24 22:25:03,840 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:25:03,840 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:25:03,841 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2021-03-24 22:25:03,841 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:25:03,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:25:03,841 INFO L82 PathProgramCache]: Analyzing trace with hash 680422194, now seen corresponding path program 1 times [2021-03-24 22:25:03,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:25:03,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228271092] [2021-03-24 22:25:03,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:25:03,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:25:03,863 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:25:03,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:25:03,864 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:25:03,880 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:25:03,880 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:25:03,881 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2021-03-24 22:25:03,881 WARN L342 ceAbstractionStarter]: 92 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:25:03,881 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 93 thread instances. [2021-03-24 22:25:04,059 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:25:04,059 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:25:04,059 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:25:04,059 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:25:04,059 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:25:04,059 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:25:04,059 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:25:04,060 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:25:04,060 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:25:04,060 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:25:04,062 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 471 places, 284 transitions, 9589 flow [2021-03-24 22:25:04,265 INFO L129 PetriNetUnfolder]: 0/563 cut-off events. [2021-03-24 22:25:04,265 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:25:04,265 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5214 conditions, 563 events. 0/563 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2093 event pairs, 0 based on Foata normal form. 0/469 useless extension candidates. Maximal degree in co-relation 0. Up to 94 conditions per place. [2021-03-24 22:25:04,265 INFO L82 GeneralOperation]: Start removeDead. Operand has 471 places, 284 transitions, 9589 flow [2021-03-24 22:25:04,268 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 469 places, 282 transitions, 9585 flow [2021-03-24 22:25:04,268 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:25:04,268 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 469 places, 282 transitions, 9585 flow [2021-03-24 22:25:04,268 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 469 places, 282 transitions, 9585 flow [2021-03-24 22:25:04,270 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 469 places, 282 transitions, 9585 flow [2021-03-24 22:25:04,374 INFO L129 PetriNetUnfolder]: 0/375 cut-off events. [2021-03-24 22:25:04,374 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:25:04,374 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5026 conditions, 375 events. 0/375 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1039 event pairs, 0 based on Foata normal form. 0/375 useless extension candidates. Maximal degree in co-relation 0. Up to 94 conditions per place. [2021-03-24 22:25:04,414 INFO L142 LiptonReduction]: Number of co-enabled transitions 52080 [2021-03-24 22:25:44,520 INFO L154 LiptonReduction]: Checked pairs total: 21576 [2021-03-24 22:25:44,520 INFO L156 LiptonReduction]: Total number of compositions: 93 [2021-03-24 22:25:44,520 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 40252 [2021-03-24 22:25:44,521 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2021-03-24 22:25:44,521 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:25:44,521 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:25:44,521 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:25:44,521 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:25:44,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:25:44,522 INFO L82 PathProgramCache]: Analyzing trace with hash 572451, now seen corresponding path program 1 times [2021-03-24 22:25:44,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:25:44,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356542115] [2021-03-24 22:25:44,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:25:44,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:25:44,630 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:25:44,632 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:25:44,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:25:44,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356542115] [2021-03-24 22:25:44,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:25:44,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:25:44,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708688462] [2021-03-24 22:25:44,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:25:44,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:25:44,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:25:44,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:25:44,641 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 374 out of 377 [2021-03-24 22:25:44,641 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 189 transitions, 9399 flow. Second operand has 3 states, 3 states have (on average 374.6666666666667) internal successors, (1124), 3 states have internal predecessors, (1124), 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) [2021-03-24 22:25:44,641 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:25:44,641 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 374 of 377 [2021-03-24 22:25:44,641 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:25:44,710 INFO L129 PetriNetUnfolder]: 0/188 cut-off events. [2021-03-24 22:25:44,710 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:25:44,710 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4841 conditions, 188 events. 0/188 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 205 event pairs, 0 based on Foata normal form. 94/282 useless extension candidates. Maximal degree in co-relation 0. Up to 94 conditions per place. [2021-03-24 22:25:44,711 INFO L132 encePairwiseOnDemand]: 375/377 looper letters, 0 selfloop transitions, 1 changer transitions 0/188 dead transitions. [2021-03-24 22:25:44,711 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 188 transitions, 9399 flow [2021-03-24 22:25:44,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:25:44,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:25:44,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1124 transitions. [2021-03-24 22:25:44,713 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9938107869142352 [2021-03-24 22:25:44,713 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1124 transitions. [2021-03-24 22:25:44,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1124 transitions. [2021-03-24 22:25:44,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:25:44,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1124 transitions. [2021-03-24 22:25:44,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 374.6666666666667) internal successors, (1124), 3 states have internal predecessors, (1124), 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) [2021-03-24 22:25:44,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 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) [2021-03-24 22:25:44,715 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 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) [2021-03-24 22:25:44,716 INFO L185 Difference]: Start difference. First operand has 376 places, 189 transitions, 9399 flow. Second operand 3 states and 1124 transitions. [2021-03-24 22:25:44,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 188 transitions, 9399 flow [2021-03-24 22:25:45,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 188 transitions, 843 flow, removed 4278 selfloop flow, removed 0 redundant places. [2021-03-24 22:25:45,023 INFO L241 Difference]: Finished difference. Result has 377 places, 188 transitions, 843 flow [2021-03-24 22:25:45,024 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=841, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=843, PETRI_PLACES=377, PETRI_TRANSITIONS=188} [2021-03-24 22:25:45,024 INFO L343 CegarLoopForPetriNet]: 376 programPoint places, 1 predicate places. [2021-03-24 22:25:45,024 INFO L480 AbstractCegarLoop]: Abstraction has has 377 places, 188 transitions, 843 flow [2021-03-24 22:25:45,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 374.6666666666667) internal successors, (1124), 3 states have internal predecessors, (1124), 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) [2021-03-24 22:25:45,024 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:25:45,024 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:25:45,024 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2021-03-24 22:25:45,024 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:25:45,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:25:45,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1058408339, now seen corresponding path program 1 times [2021-03-24 22:25:45,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:25:45,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112546819] [2021-03-24 22:25:45,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:25:45,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:25:45,044 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:25:45,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:25:45,046 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:25:45,064 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:25:45,064 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:25:45,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2021-03-24 22:25:45,064 WARN L342 ceAbstractionStarter]: 93 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:25:45,064 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 94 thread instances. [2021-03-24 22:25:45,241 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:25:45,241 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:25:45,242 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:25:45,242 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:25:45,242 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:25:45,242 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:25:45,242 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:25:45,242 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:25:45,242 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:25:45,242 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:25:45,244 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 476 places, 287 transitions, 9786 flow [2021-03-24 22:25:45,377 INFO L129 PetriNetUnfolder]: 0/569 cut-off events. [2021-03-24 22:25:45,377 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:25:45,377 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5317 conditions, 569 events. 0/569 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2098 event pairs, 0 based on Foata normal form. 0/474 useless extension candidates. Maximal degree in co-relation 0. Up to 95 conditions per place. [2021-03-24 22:25:45,377 INFO L82 GeneralOperation]: Start removeDead. Operand has 476 places, 287 transitions, 9786 flow [2021-03-24 22:25:45,380 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 474 places, 285 transitions, 9782 flow [2021-03-24 22:25:45,380 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:25:45,380 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 474 places, 285 transitions, 9782 flow [2021-03-24 22:25:45,381 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 474 places, 285 transitions, 9782 flow [2021-03-24 22:25:45,383 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 474 places, 285 transitions, 9782 flow [2021-03-24 22:25:45,489 INFO L129 PetriNetUnfolder]: 0/379 cut-off events. [2021-03-24 22:25:45,489 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:25:45,490 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5127 conditions, 379 events. 0/379 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1177 event pairs, 0 based on Foata normal form. 0/379 useless extension candidates. Maximal degree in co-relation 0. Up to 95 conditions per place. [2021-03-24 22:25:45,531 INFO L142 LiptonReduction]: Number of co-enabled transitions 53204 [2021-03-24 22:26:27,238 INFO L154 LiptonReduction]: Checked pairs total: 22043 [2021-03-24 22:26:27,239 INFO L156 LiptonReduction]: Total number of compositions: 94 [2021-03-24 22:26:27,239 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 41859 [2021-03-24 22:26:27,240 INFO L129 PetriNetUnfolder]: 0/1 cut-off events. [2021-03-24 22:26:27,240 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:26:27,240 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:26:27,240 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1] [2021-03-24 22:26:27,240 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:26:27,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:26:27,240 INFO L82 PathProgramCache]: Analyzing trace with hash 584611, now seen corresponding path program 1 times [2021-03-24 22:26:27,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:26:27,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934470704] [2021-03-24 22:26:27,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:26:27,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:26:27,263 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:26:27,265 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:26:27,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:26:27,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934470704] [2021-03-24 22:26:27,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:26:27,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:26:27,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501309140] [2021-03-24 22:26:27,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:26:27,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:26:27,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:26:27,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:26:27,274 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 378 out of 381 [2021-03-24 22:26:27,275 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 191 transitions, 9594 flow. Second operand has 3 states, 3 states have (on average 378.6666666666667) internal successors, (1136), 3 states have internal predecessors, (1136), 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) [2021-03-24 22:26:27,275 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:26:27,275 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 378 of 381 [2021-03-24 22:26:27,275 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:26:27,347 INFO L129 PetriNetUnfolder]: 0/190 cut-off events. [2021-03-24 22:26:27,347 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:26:27,347 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4940 conditions, 190 events. 0/190 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 198 event pairs, 0 based on Foata normal form. 95/285 useless extension candidates. Maximal degree in co-relation 0. Up to 95 conditions per place. [2021-03-24 22:26:27,348 INFO L132 encePairwiseOnDemand]: 379/381 looper letters, 0 selfloop transitions, 1 changer transitions 0/190 dead transitions. [2021-03-24 22:26:27,348 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 190 transitions, 9594 flow [2021-03-24 22:26:27,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:26:27,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:26:27,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1136 transitions. [2021-03-24 22:26:27,348 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9938757655293088 [2021-03-24 22:26:27,348 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1136 transitions. [2021-03-24 22:26:27,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1136 transitions. [2021-03-24 22:26:27,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:26:27,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1136 transitions. [2021-03-24 22:26:27,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 378.6666666666667) internal successors, (1136), 3 states have internal predecessors, (1136), 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) [2021-03-24 22:26:27,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 381.0) internal successors, (1524), 4 states have internal predecessors, (1524), 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) [2021-03-24 22:26:27,350 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 381.0) internal successors, (1524), 4 states have internal predecessors, (1524), 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) [2021-03-24 22:26:27,350 INFO L185 Difference]: Start difference. First operand has 380 places, 191 transitions, 9594 flow. Second operand 3 states and 1136 transitions. [2021-03-24 22:26:27,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 190 transitions, 9594 flow [2021-03-24 22:26:27,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 190 transitions, 852 flow, removed 4371 selfloop flow, removed 0 redundant places. [2021-03-24 22:26:27,654 INFO L241 Difference]: Finished difference. Result has 381 places, 190 transitions, 852 flow [2021-03-24 22:26:27,654 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=381, PETRI_DIFFERENCE_MINUEND_FLOW=850, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=852, PETRI_PLACES=381, PETRI_TRANSITIONS=190} [2021-03-24 22:26:27,654 INFO L343 CegarLoopForPetriNet]: 380 programPoint places, 1 predicate places. [2021-03-24 22:26:27,654 INFO L480 AbstractCegarLoop]: Abstraction has has 381 places, 190 transitions, 852 flow [2021-03-24 22:26:27,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 378.6666666666667) internal successors, (1136), 3 states have internal predecessors, (1136), 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) [2021-03-24 22:26:27,654 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:26:27,654 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:26:27,654 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2021-03-24 22:26:27,655 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:26:27,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:26:27,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1970217205, now seen corresponding path program 1 times [2021-03-24 22:26:27,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:26:27,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383659791] [2021-03-24 22:26:27,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:26:27,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:26:27,676 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:26:27,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:26:27,678 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:26:27,698 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:26:27,698 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:26:27,698 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2021-03-24 22:26:27,698 WARN L342 ceAbstractionStarter]: 94 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-24 22:26:27,698 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 95 thread instances. [2021-03-24 22:26:27,877 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 22:26:27,878 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-03-24 22:26:27,878 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:26:27,878 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:26:27,878 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:26:27,878 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:26:27,878 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:26:27,878 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:26:27,878 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:26:27,878 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:26:27,880 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 481 places, 290 transitions, 9985 flow [2021-03-24 22:26:28,016 INFO L129 PetriNetUnfolder]: 0/575 cut-off events. [2021-03-24 22:26:28,016 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:26:28,016 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5421 conditions, 575 events. 0/575 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2089 event pairs, 0 based on Foata normal form. 0/479 useless extension candidates. Maximal degree in co-relation 0. Up to 96 conditions per place. [2021-03-24 22:26:28,016 INFO L82 GeneralOperation]: Start removeDead. Operand has 481 places, 290 transitions, 9985 flow [2021-03-24 22:26:28,019 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 479 places, 288 transitions, 9981 flow [2021-03-24 22:26:28,019 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:26:28,020 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 479 places, 288 transitions, 9981 flow [2021-03-24 22:26:28,020 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 479 places, 288 transitions, 9981 flow [2021-03-24 22:26:28,022 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 479 places, 288 transitions, 9981 flow [2021-03-24 22:26:28,131 INFO L129 PetriNetUnfolder]: 0/383 cut-off events. [2021-03-24 22:26:28,131 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:26:28,131 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5229 conditions, 383 events. 0/383 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1077 event pairs, 0 based on Foata normal form. 0/383 useless extension candidates. Maximal degree in co-relation 0. Up to 96 conditions per place. [2021-03-24 22:26:28,173 INFO L142 LiptonReduction]: Number of co-enabled transitions 54340 [2021-03-24 22:26:56,029 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 5 Received shutdown request... [2021-03-24 22:27:02,437 WARN L545 AbstractCegarLoop]: Verification canceled [2021-03-24 22:27:02,439 WARN L224 ceAbstractionStarter]: Timeout [2021-03-24 22:27:02,439 INFO L202 PluginConnector]: Adding new model fork_loop_noop.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.03 10:27:02 BasicIcfg [2021-03-24 22:27:02,439 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-24 22:27:02,440 INFO L168 Benchmark]: Toolchain (without parser) took 762313.12 ms. Allocated memory was 362.8 MB in the beginning and 2.9 GB in the end (delta: 2.6 GB). Free memory was 343.4 MB in the beginning and 1.9 GB in the end (delta: -1.6 GB). Peak memory consumption was 2.1 GB. Max. memory is 16.0 GB. [2021-03-24 22:27:02,440 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 362.8 MB. Free memory was 344.4 MB in the beginning and 344.3 MB in the end (delta: 76.7 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 22:27:02,440 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.34 ms. Allocated memory is still 362.8 MB. Free memory was 343.4 MB in the beginning and 341.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 22:27:02,440 INFO L168 Benchmark]: Boogie Preprocessor took 11.54 ms. Allocated memory is still 362.8 MB. Free memory was 341.8 MB in the beginning and 340.9 MB in the end (delta: 921.9 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 22:27:02,440 INFO L168 Benchmark]: RCFGBuilder took 173.43 ms. Allocated memory is still 362.8 MB. Free memory was 340.9 MB in the beginning and 332.8 MB in the end (delta: 8.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-03-24 22:27:02,440 INFO L168 Benchmark]: TraceAbstraction took 762103.44 ms. Allocated memory was 362.8 MB in the beginning and 2.9 GB in the end (delta: 2.6 GB). Free memory was 332.4 MB in the beginning and 1.9 GB in the end (delta: -1.6 GB). Peak memory consumption was 2.1 GB. Max. memory is 16.0 GB. [2021-03-24 22:27:02,441 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 0.10 ms. Allocated memory is still 362.8 MB. Free memory was 344.4 MB in the beginning and 344.3 MB in the end (delta: 76.7 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 20.34 ms. Allocated memory is still 362.8 MB. Free memory was 343.4 MB in the beginning and 341.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.54 ms. Allocated memory is still 362.8 MB. Free memory was 341.8 MB in the beginning and 340.9 MB in the end (delta: 921.9 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 173.43 ms. Allocated memory is still 362.8 MB. Free memory was 340.9 MB in the beginning and 332.8 MB in the end (delta: 8.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 762103.44 ms. Allocated memory was 362.8 MB in the beginning and 2.9 GB in the end (delta: 2.6 GB). Free memory was 332.4 MB in the beginning and 1.9 GB in the end (delta: -1.6 GB). Peak memory consumption was 2.1 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 25.6ms, 9 PlacesBefore, 8 PlacesAfterwards, 6 TransitionsBefore, 5 TransitionsAfterwards, 8 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 1 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 1 TotalNumberOfCompositions, 2 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2, positive: 2, positive conditional: 0, positive unconditional: 2, 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: 2, positive: 2, positive conditional: 0, positive unconditional: 2, 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: 2, positive: 2, positive conditional: 0, positive unconditional: 2, 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: 2, positive: 2, positive conditional: 0, positive unconditional: 2, 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: 2, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 2, unknown conditional: 0, unknown unconditional: 2] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 72.5ms, 14 PlacesBefore, 12 PlacesAfterwards, 9 TransitionsBefore, 7 TransitionsAfterwards, 28 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 2 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 2 TotalNumberOfCompositions, 9 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 9, positive: 9, positive conditional: 0, positive unconditional: 9, 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: 9, positive: 9, positive conditional: 0, positive unconditional: 9, 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: 9, positive: 9, positive conditional: 0, positive unconditional: 9, 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: 9, positive: 7, positive conditional: 0, positive unconditional: 7, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 2, positive: 2, positive conditional: 0, positive unconditional: 2, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 15, positive: 15, positive conditional: 0, positive unconditional: 15, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 9, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 9, unknown conditional: 0, unknown unconditional: 9] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 62.0ms, 19 PlacesBefore, 16 PlacesAfterwards, 12 TransitionsBefore, 9 TransitionsAfterwards, 60 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 3 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 3 TotalNumberOfCompositions, 21 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 21, positive: 21, positive conditional: 0, positive unconditional: 21, 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: 21, positive: 21, positive conditional: 0, positive unconditional: 21, 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: 21, positive: 21, positive conditional: 0, positive unconditional: 21, 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: 21, positive: 15, positive conditional: 0, positive unconditional: 15, negative: 6, negative conditional: 0, negative unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 6, positive: 6, positive conditional: 0, positive unconditional: 6, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 24, positive: 24, positive conditional: 0, positive unconditional: 24, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 21, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 21, unknown conditional: 0, unknown unconditional: 21] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 76.8ms, 24 PlacesBefore, 20 PlacesAfterwards, 15 TransitionsBefore, 11 TransitionsAfterwards, 104 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 4 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 4 TotalNumberOfCompositions, 38 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 38, positive: 38, positive conditional: 0, positive unconditional: 38, 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: 38, positive: 38, positive conditional: 0, positive unconditional: 38, 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: 38, positive: 38, positive conditional: 0, positive unconditional: 38, 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: 38, positive: 26, positive conditional: 0, positive unconditional: 26, negative: 12, negative conditional: 0, negative unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 12, positive: 12, positive conditional: 0, positive unconditional: 12, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 38, positive: 38, positive conditional: 0, positive unconditional: 38, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 38, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 38, unknown conditional: 0, unknown unconditional: 38] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 82.0ms, 29 PlacesBefore, 24 PlacesAfterwards, 18 TransitionsBefore, 13 TransitionsAfterwards, 160 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 5 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 5 TotalNumberOfCompositions, 60 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 60, positive: 60, positive conditional: 0, positive unconditional: 60, 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: 60, positive: 60, positive conditional: 0, positive unconditional: 60, 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: 60, positive: 60, positive conditional: 0, positive unconditional: 60, 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: 60, positive: 40, positive conditional: 0, positive unconditional: 40, negative: 20, negative conditional: 0, negative unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 20, positive: 20, positive conditional: 0, positive unconditional: 20, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 44, positive: 44, positive conditional: 0, positive unconditional: 44, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 60, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 60, unknown conditional: 0, unknown unconditional: 60] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 148.3ms, 34 PlacesBefore, 28 PlacesAfterwards, 21 TransitionsBefore, 15 TransitionsAfterwards, 228 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 6 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 6 TotalNumberOfCompositions, 87 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 87, positive: 87, positive conditional: 0, positive unconditional: 87, 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: 87, positive: 87, positive conditional: 0, positive unconditional: 87, 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: 87, positive: 87, positive conditional: 0, positive unconditional: 87, 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: 87, positive: 57, positive conditional: 0, positive unconditional: 57, negative: 30, negative conditional: 0, negative unconditional: 30, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 30, positive: 30, positive conditional: 0, positive unconditional: 30, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 99, positive: 99, positive conditional: 0, positive unconditional: 99, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 87, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 87, unknown conditional: 0, unknown unconditional: 87] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 169.2ms, 39 PlacesBefore, 32 PlacesAfterwards, 24 TransitionsBefore, 17 TransitionsAfterwards, 308 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 7 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 7 TotalNumberOfCompositions, 119 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 119, positive: 119, positive conditional: 0, positive unconditional: 119, 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: 119, positive: 119, positive conditional: 0, positive unconditional: 119, 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: 119, positive: 119, positive conditional: 0, positive unconditional: 119, 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: 119, positive: 77, positive conditional: 0, positive unconditional: 77, negative: 42, negative conditional: 0, negative unconditional: 42, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 42, positive: 42, positive conditional: 0, positive unconditional: 42, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 114, positive: 114, positive conditional: 0, positive unconditional: 114, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 119, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 119, unknown conditional: 0, unknown unconditional: 119] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 161.6ms, 44 PlacesBefore, 36 PlacesAfterwards, 27 TransitionsBefore, 19 TransitionsAfterwards, 400 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 8 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 8 TotalNumberOfCompositions, 156 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 156, positive: 156, positive conditional: 0, positive unconditional: 156, 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: 156, positive: 156, positive conditional: 0, positive unconditional: 156, 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: 156, positive: 156, positive conditional: 0, positive unconditional: 156, 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: 156, positive: 100, positive conditional: 0, positive unconditional: 100, negative: 56, negative conditional: 0, negative unconditional: 56, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 56, positive: 56, positive conditional: 0, positive unconditional: 56, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 103, positive: 103, positive conditional: 0, positive unconditional: 103, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 156, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 156, unknown conditional: 0, unknown unconditional: 156] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 193.4ms, 49 PlacesBefore, 40 PlacesAfterwards, 30 TransitionsBefore, 21 TransitionsAfterwards, 504 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 9 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 9 TotalNumberOfCompositions, 198 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 198, positive: 198, positive conditional: 0, positive unconditional: 198, 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: 198, positive: 198, positive conditional: 0, positive unconditional: 198, 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: 198, positive: 198, positive conditional: 0, positive unconditional: 198, 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: 198, positive: 126, positive conditional: 0, positive unconditional: 126, negative: 72, negative conditional: 0, negative unconditional: 72, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 72, positive: 72, positive conditional: 0, positive unconditional: 72, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 122, positive: 122, positive conditional: 0, positive unconditional: 122, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 198, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 198, unknown conditional: 0, unknown unconditional: 198] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 241.7ms, 54 PlacesBefore, 44 PlacesAfterwards, 33 TransitionsBefore, 23 TransitionsAfterwards, 620 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 10 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 10 TotalNumberOfCompositions, 245 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 245, positive: 245, positive conditional: 0, positive unconditional: 245, 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: 245, positive: 245, positive conditional: 0, positive unconditional: 245, 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: 245, positive: 245, positive conditional: 0, positive unconditional: 245, 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: 245, positive: 155, positive conditional: 0, positive unconditional: 155, negative: 90, negative conditional: 0, negative unconditional: 90, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 90, positive: 90, positive conditional: 0, positive unconditional: 90, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 160, positive: 160, positive conditional: 0, positive unconditional: 160, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 245, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 245, unknown conditional: 0, unknown unconditional: 245] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 281.1ms, 59 PlacesBefore, 48 PlacesAfterwards, 36 TransitionsBefore, 25 TransitionsAfterwards, 748 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 11 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 11 TotalNumberOfCompositions, 297 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 297, positive: 297, positive conditional: 0, positive unconditional: 297, 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: 297, positive: 297, positive conditional: 0, positive unconditional: 297, 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: 297, positive: 297, positive conditional: 0, positive unconditional: 297, 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: 297, positive: 187, positive conditional: 0, positive unconditional: 187, negative: 110, negative conditional: 0, negative unconditional: 110, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 110, positive: 110, positive conditional: 0, positive unconditional: 110, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 208, positive: 208, positive conditional: 0, positive unconditional: 208, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 297, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 297, unknown conditional: 0, unknown unconditional: 297] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 346.0ms, 64 PlacesBefore, 52 PlacesAfterwards, 39 TransitionsBefore, 27 TransitionsAfterwards, 888 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 12 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 12 TotalNumberOfCompositions, 354 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 354, positive: 354, positive conditional: 0, positive unconditional: 354, 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: 354, positive: 354, positive conditional: 0, positive unconditional: 354, 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: 354, positive: 354, positive conditional: 0, positive unconditional: 354, 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: 354, positive: 222, positive conditional: 0, positive unconditional: 222, negative: 132, negative conditional: 0, negative unconditional: 132, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 132, positive: 132, positive conditional: 0, positive unconditional: 132, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 272, positive: 272, positive conditional: 0, positive unconditional: 272, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 354, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 354, unknown conditional: 0, unknown unconditional: 354] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 381.3ms, 69 PlacesBefore, 56 PlacesAfterwards, 42 TransitionsBefore, 29 TransitionsAfterwards, 1040 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 13 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 13 TotalNumberOfCompositions, 416 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 416, positive: 416, positive conditional: 0, positive unconditional: 416, 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: 416, positive: 416, positive conditional: 0, positive unconditional: 416, 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: 416, positive: 416, positive conditional: 0, positive unconditional: 416, 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: 416, positive: 260, positive conditional: 0, positive unconditional: 260, negative: 156, negative conditional: 0, negative unconditional: 156, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 156, positive: 156, positive conditional: 0, positive unconditional: 156, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 287, positive: 287, positive conditional: 0, positive unconditional: 287, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 416, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 416, unknown conditional: 0, unknown unconditional: 416] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 411.8ms, 74 PlacesBefore, 60 PlacesAfterwards, 45 TransitionsBefore, 31 TransitionsAfterwards, 1204 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 14 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 14 TotalNumberOfCompositions, 483 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 483, positive: 483, positive conditional: 0, positive unconditional: 483, 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: 483, positive: 483, positive conditional: 0, positive unconditional: 483, 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: 483, positive: 483, positive conditional: 0, positive unconditional: 483, 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: 483, positive: 301, positive conditional: 0, positive unconditional: 301, negative: 182, negative conditional: 0, negative unconditional: 182, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 182, positive: 182, positive conditional: 0, positive unconditional: 182, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 318, positive: 318, positive conditional: 0, positive unconditional: 318, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 483, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 483, unknown conditional: 0, unknown unconditional: 483] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 427.4ms, 79 PlacesBefore, 64 PlacesAfterwards, 48 TransitionsBefore, 33 TransitionsAfterwards, 1380 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 15 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 15 TotalNumberOfCompositions, 555 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 555, positive: 555, positive conditional: 0, positive unconditional: 555, 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: 555, positive: 555, positive conditional: 0, positive unconditional: 555, 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: 555, positive: 555, positive conditional: 0, positive unconditional: 555, 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: 555, positive: 345, positive conditional: 0, positive unconditional: 345, negative: 210, negative conditional: 0, negative unconditional: 210, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 210, positive: 210, positive conditional: 0, positive unconditional: 210, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 327, positive: 327, positive conditional: 0, positive unconditional: 327, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 555, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 555, unknown conditional: 0, unknown unconditional: 555] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 463.1ms, 84 PlacesBefore, 68 PlacesAfterwards, 51 TransitionsBefore, 35 TransitionsAfterwards, 1568 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 16 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 16 TotalNumberOfCompositions, 632 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 632, positive: 632, positive conditional: 0, positive unconditional: 632, 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: 632, positive: 632, positive conditional: 0, positive unconditional: 632, 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: 632, positive: 632, positive conditional: 0, positive unconditional: 632, 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: 632, positive: 392, positive conditional: 0, positive unconditional: 392, negative: 240, negative conditional: 0, negative unconditional: 240, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 240, positive: 240, positive conditional: 0, positive unconditional: 240, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 364, positive: 364, positive conditional: 0, positive unconditional: 364, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 632, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 632, unknown conditional: 0, unknown unconditional: 632] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 543.8ms, 89 PlacesBefore, 72 PlacesAfterwards, 54 TransitionsBefore, 37 TransitionsAfterwards, 1768 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 17 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 17 TotalNumberOfCompositions, 714 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 714, positive: 714, positive conditional: 0, positive unconditional: 714, 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: 714, positive: 714, positive conditional: 0, positive unconditional: 714, 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: 714, positive: 714, positive conditional: 0, positive unconditional: 714, 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: 714, positive: 442, positive conditional: 0, positive unconditional: 442, negative: 272, negative conditional: 0, negative unconditional: 272, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 272, positive: 272, positive conditional: 0, positive unconditional: 272, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 438, positive: 438, positive conditional: 0, positive unconditional: 438, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 714, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 714, unknown conditional: 0, unknown unconditional: 714] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 566.3ms, 94 PlacesBefore, 76 PlacesAfterwards, 57 TransitionsBefore, 39 TransitionsAfterwards, 1980 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 18 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 18 TotalNumberOfCompositions, 801 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 801, positive: 801, positive conditional: 0, positive unconditional: 801, 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: 801, positive: 801, positive conditional: 0, positive unconditional: 801, 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: 801, positive: 801, positive conditional: 0, positive unconditional: 801, 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: 801, positive: 495, positive conditional: 0, positive unconditional: 495, negative: 306, negative conditional: 0, negative unconditional: 306, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 306, positive: 306, positive conditional: 0, positive unconditional: 306, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 458, positive: 458, positive conditional: 0, positive unconditional: 458, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 801, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 801, unknown conditional: 0, unknown unconditional: 801] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 651.5ms, 99 PlacesBefore, 80 PlacesAfterwards, 60 TransitionsBefore, 41 TransitionsAfterwards, 2204 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 19 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 19 TotalNumberOfCompositions, 893 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 893, positive: 893, positive conditional: 0, positive unconditional: 893, 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: 893, positive: 893, positive conditional: 0, positive unconditional: 893, 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: 893, positive: 893, positive conditional: 0, positive unconditional: 893, 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: 893, positive: 551, positive conditional: 0, positive unconditional: 551, negative: 342, negative conditional: 0, negative unconditional: 342, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 342, positive: 342, positive conditional: 0, positive unconditional: 342, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 524, positive: 524, positive conditional: 0, positive unconditional: 524, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 893, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 893, unknown conditional: 0, unknown unconditional: 893] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 733.1ms, 104 PlacesBefore, 84 PlacesAfterwards, 63 TransitionsBefore, 43 TransitionsAfterwards, 2440 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 20 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 20 TotalNumberOfCompositions, 990 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 990, positive: 990, positive conditional: 0, positive unconditional: 990, 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: 990, positive: 990, positive conditional: 0, positive unconditional: 990, 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: 990, positive: 990, positive conditional: 0, positive unconditional: 990, 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: 990, positive: 610, positive conditional: 0, positive unconditional: 610, negative: 380, negative conditional: 0, negative unconditional: 380, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 380, positive: 380, positive conditional: 0, positive unconditional: 380, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 593, positive: 593, positive conditional: 0, positive unconditional: 593, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 990, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 990, unknown conditional: 0, unknown unconditional: 990] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 736.2ms, 109 PlacesBefore, 88 PlacesAfterwards, 66 TransitionsBefore, 45 TransitionsAfterwards, 2688 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 21 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 21 TotalNumberOfCompositions, 1092 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1092, positive: 1092, positive conditional: 0, positive unconditional: 1092, 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: 1092, positive: 1092, positive conditional: 0, positive unconditional: 1092, 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: 1092, positive: 1092, positive conditional: 0, positive unconditional: 1092, 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: 1092, positive: 672, positive conditional: 0, positive unconditional: 672, negative: 420, negative conditional: 0, negative unconditional: 420, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 420, positive: 420, positive conditional: 0, positive unconditional: 420, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 599, positive: 599, positive conditional: 0, positive unconditional: 599, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1092, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 1092, unknown conditional: 0, unknown unconditional: 1092] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 826.2ms, 114 PlacesBefore, 92 PlacesAfterwards, 69 TransitionsBefore, 47 TransitionsAfterwards, 2948 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 22 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 22 TotalNumberOfCompositions, 1199 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1199, positive: 1199, positive conditional: 0, positive unconditional: 1199, 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: 1199, positive: 1199, positive conditional: 0, positive unconditional: 1199, 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: 1199, positive: 1199, positive conditional: 0, positive unconditional: 1199, 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: 1199, positive: 737, positive conditional: 0, positive unconditional: 737, negative: 462, negative conditional: 0, negative unconditional: 462, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 462, positive: 462, positive conditional: 0, positive unconditional: 462, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 696, positive: 696, positive conditional: 0, positive unconditional: 696, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1199, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 1199, unknown conditional: 0, unknown unconditional: 1199] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 815.3ms, 119 PlacesBefore, 96 PlacesAfterwards, 72 TransitionsBefore, 49 TransitionsAfterwards, 3220 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 23 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 23 TotalNumberOfCompositions, 1311 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1311, positive: 1311, positive conditional: 0, positive unconditional: 1311, 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: 1311, positive: 1311, positive conditional: 0, positive unconditional: 1311, 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: 1311, positive: 1311, positive conditional: 0, positive unconditional: 1311, 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: 1311, positive: 805, positive conditional: 0, positive unconditional: 805, negative: 506, negative conditional: 0, negative unconditional: 506, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 506, positive: 506, positive conditional: 0, positive unconditional: 506, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 674, positive: 674, positive conditional: 0, positive unconditional: 674, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1311, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 1311, unknown conditional: 0, unknown unconditional: 1311] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 879.9ms, 124 PlacesBefore, 100 PlacesAfterwards, 75 TransitionsBefore, 51 TransitionsAfterwards, 3504 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 24 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 24 TotalNumberOfCompositions, 1428 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1428, positive: 1428, positive conditional: 0, positive unconditional: 1428, 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: 1428, positive: 1428, positive conditional: 0, positive unconditional: 1428, 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: 1428, positive: 1428, positive conditional: 0, positive unconditional: 1428, 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: 1428, positive: 876, positive conditional: 0, positive unconditional: 876, negative: 552, negative conditional: 0, negative unconditional: 552, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 552, positive: 552, positive conditional: 0, positive unconditional: 552, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 733, positive: 733, positive conditional: 0, positive unconditional: 733, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1428, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 1428, unknown conditional: 0, unknown unconditional: 1428] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 923.4ms, 129 PlacesBefore, 104 PlacesAfterwards, 78 TransitionsBefore, 53 TransitionsAfterwards, 3800 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 25 TotalNumberOfCompositions, 1550 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1550, positive: 1550, positive conditional: 0, positive unconditional: 1550, 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: 1550, positive: 1550, positive conditional: 0, positive unconditional: 1550, 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: 1550, positive: 1550, positive conditional: 0, positive unconditional: 1550, 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: 1550, positive: 950, positive conditional: 0, positive unconditional: 950, negative: 600, negative conditional: 0, negative unconditional: 600, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 600, positive: 600, positive conditional: 0, positive unconditional: 600, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 790, positive: 790, positive conditional: 0, positive unconditional: 790, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1550, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 1550, unknown conditional: 0, unknown unconditional: 1550] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1104.5ms, 134 PlacesBefore, 108 PlacesAfterwards, 81 TransitionsBefore, 55 TransitionsAfterwards, 4108 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 26 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 26 TotalNumberOfCompositions, 1677 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1677, positive: 1677, positive conditional: 0, positive unconditional: 1677, 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: 1677, positive: 1677, positive conditional: 0, positive unconditional: 1677, 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: 1677, positive: 1677, positive conditional: 0, positive unconditional: 1677, 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: 1677, positive: 1027, positive conditional: 0, positive unconditional: 1027, negative: 650, negative conditional: 0, negative unconditional: 650, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 650, positive: 650, positive conditional: 0, positive unconditional: 650, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 952, positive: 952, positive conditional: 0, positive unconditional: 952, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1677, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 1677, unknown conditional: 0, unknown unconditional: 1677] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1016.1ms, 139 PlacesBefore, 112 PlacesAfterwards, 84 TransitionsBefore, 57 TransitionsAfterwards, 4428 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 27 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 27 TotalNumberOfCompositions, 1809 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1809, positive: 1809, positive conditional: 0, positive unconditional: 1809, 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: 1809, positive: 1809, positive conditional: 0, positive unconditional: 1809, 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: 1809, positive: 1809, positive conditional: 0, positive unconditional: 1809, 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: 1809, positive: 1107, positive conditional: 0, positive unconditional: 1107, negative: 702, negative conditional: 0, negative unconditional: 702, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 702, positive: 702, positive conditional: 0, positive unconditional: 702, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 869, positive: 869, positive conditional: 0, positive unconditional: 869, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1809, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 1809, unknown conditional: 0, unknown unconditional: 1809] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1092.7ms, 144 PlacesBefore, 116 PlacesAfterwards, 87 TransitionsBefore, 59 TransitionsAfterwards, 4760 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 28 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 28 TotalNumberOfCompositions, 1946 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1946, positive: 1946, positive conditional: 0, positive unconditional: 1946, 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: 1946, positive: 1946, positive conditional: 0, positive unconditional: 1946, 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: 1946, positive: 1946, positive conditional: 0, positive unconditional: 1946, 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: 1946, positive: 1190, positive conditional: 0, positive unconditional: 1190, negative: 756, negative conditional: 0, negative unconditional: 756, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 756, positive: 756, positive conditional: 0, positive unconditional: 756, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 944, positive: 944, positive conditional: 0, positive unconditional: 944, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1946, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 1946, unknown conditional: 0, unknown unconditional: 1946] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1217.6ms, 149 PlacesBefore, 120 PlacesAfterwards, 90 TransitionsBefore, 61 TransitionsAfterwards, 5104 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 29 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 29 TotalNumberOfCompositions, 2088 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2088, positive: 2088, positive conditional: 0, positive unconditional: 2088, 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: 2088, positive: 2088, positive conditional: 0, positive unconditional: 2088, 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: 2088, positive: 2088, positive conditional: 0, positive unconditional: 2088, 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: 2088, positive: 1276, positive conditional: 0, positive unconditional: 1276, negative: 812, negative conditional: 0, negative unconditional: 812, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 812, positive: 812, positive conditional: 0, positive unconditional: 812, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 1062, positive: 1062, positive conditional: 0, positive unconditional: 1062, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 2088, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 2088, unknown conditional: 0, unknown unconditional: 2088] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1246.4ms, 154 PlacesBefore, 124 PlacesAfterwards, 93 TransitionsBefore, 63 TransitionsAfterwards, 5460 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 30 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 30 TotalNumberOfCompositions, 2235 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2235, positive: 2235, positive conditional: 0, positive unconditional: 2235, 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: 2235, positive: 2235, positive conditional: 0, positive unconditional: 2235, 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: 2235, positive: 2235, positive conditional: 0, positive unconditional: 2235, 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: 2235, positive: 1365, positive conditional: 0, positive unconditional: 1365, negative: 870, negative conditional: 0, negative unconditional: 870, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 870, positive: 870, positive conditional: 0, positive unconditional: 870, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 1087, positive: 1087, positive conditional: 0, positive unconditional: 1087, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 2235, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 2235, unknown conditional: 0, unknown unconditional: 2235] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1311.6ms, 159 PlacesBefore, 128 PlacesAfterwards, 96 TransitionsBefore, 65 TransitionsAfterwards, 5828 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 31 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 31 TotalNumberOfCompositions, 2387 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2387, positive: 2387, positive conditional: 0, positive unconditional: 2387, 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: 2387, positive: 2387, positive conditional: 0, positive unconditional: 2387, 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: 2387, positive: 2387, positive conditional: 0, positive unconditional: 2387, 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: 2387, positive: 1457, positive conditional: 0, positive unconditional: 1457, negative: 930, negative conditional: 0, negative unconditional: 930, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 930, positive: 930, positive conditional: 0, positive unconditional: 930, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 1122, positive: 1122, positive conditional: 0, positive unconditional: 1122, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 2387, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 2387, unknown conditional: 0, unknown unconditional: 2387] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1374.9ms, 164 PlacesBefore, 132 PlacesAfterwards, 99 TransitionsBefore, 67 TransitionsAfterwards, 6208 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 32 TotalNumberOfCompositions, 2544 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2544, positive: 2544, positive conditional: 0, positive unconditional: 2544, 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: 2544, positive: 2544, positive conditional: 0, positive unconditional: 2544, 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: 2544, positive: 2544, positive conditional: 0, positive unconditional: 2544, 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: 2544, positive: 1552, positive conditional: 0, positive unconditional: 1552, negative: 992, negative conditional: 0, negative unconditional: 992, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 992, positive: 992, positive conditional: 0, positive unconditional: 992, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 1206, positive: 1206, positive conditional: 0, positive unconditional: 1206, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 2544, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 2544, unknown conditional: 0, unknown unconditional: 2544] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1479.1ms, 169 PlacesBefore, 136 PlacesAfterwards, 102 TransitionsBefore, 69 TransitionsAfterwards, 6600 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 33 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 33 TotalNumberOfCompositions, 2706 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2706, positive: 2706, positive conditional: 0, positive unconditional: 2706, 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: 2706, positive: 2706, positive conditional: 0, positive unconditional: 2706, 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: 2706, positive: 2706, positive conditional: 0, positive unconditional: 2706, 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: 2706, positive: 1650, positive conditional: 0, positive unconditional: 1650, negative: 1056, negative conditional: 0, negative unconditional: 1056, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 1056, positive: 1056, positive conditional: 0, positive unconditional: 1056, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 1301, positive: 1301, positive conditional: 0, positive unconditional: 1301, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 2706, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 2706, unknown conditional: 0, unknown unconditional: 2706] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1614.6ms, 174 PlacesBefore, 140 PlacesAfterwards, 105 TransitionsBefore, 71 TransitionsAfterwards, 7004 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 34 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 34 TotalNumberOfCompositions, 2873 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2873, positive: 2873, positive conditional: 0, positive unconditional: 2873, 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: 2873, positive: 2873, positive conditional: 0, positive unconditional: 2873, 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: 2873, positive: 2873, positive conditional: 0, positive unconditional: 2873, 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: 2873, positive: 1751, positive conditional: 0, positive unconditional: 1751, negative: 1122, negative conditional: 0, negative unconditional: 1122, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 1122, positive: 1122, positive conditional: 0, positive unconditional: 1122, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 1426, positive: 1426, positive conditional: 0, positive unconditional: 1426, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 2873, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 2873, unknown conditional: 0, unknown unconditional: 2873] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1630.1ms, 179 PlacesBefore, 144 PlacesAfterwards, 108 TransitionsBefore, 73 TransitionsAfterwards, 7420 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 35 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 35 TotalNumberOfCompositions, 3045 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3045, positive: 3045, positive conditional: 0, positive unconditional: 3045, 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: 3045, positive: 3045, positive conditional: 0, positive unconditional: 3045, 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: 3045, positive: 3045, positive conditional: 0, positive unconditional: 3045, 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: 3045, positive: 1855, positive conditional: 0, positive unconditional: 1855, negative: 1190, negative conditional: 0, negative unconditional: 1190, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 1190, positive: 1190, positive conditional: 0, positive unconditional: 1190, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 1437, positive: 1437, positive conditional: 0, positive unconditional: 1437, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 3045, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 3045, unknown conditional: 0, unknown unconditional: 3045] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1810.7ms, 184 PlacesBefore, 148 PlacesAfterwards, 111 TransitionsBefore, 75 TransitionsAfterwards, 7848 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 36 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 36 TotalNumberOfCompositions, 3222 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3222, positive: 3222, positive conditional: 0, positive unconditional: 3222, 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: 3222, positive: 3222, positive conditional: 0, positive unconditional: 3222, 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: 3222, positive: 3222, positive conditional: 0, positive unconditional: 3222, 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: 3222, positive: 1962, positive conditional: 0, positive unconditional: 1962, negative: 1260, negative conditional: 0, negative unconditional: 1260, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 1260, positive: 1260, positive conditional: 0, positive unconditional: 1260, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 1565, positive: 1565, positive conditional: 0, positive unconditional: 1565, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 3222, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 3222, unknown conditional: 0, unknown unconditional: 3222] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1854.4ms, 189 PlacesBefore, 152 PlacesAfterwards, 114 TransitionsBefore, 77 TransitionsAfterwards, 8288 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 37 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 37 TotalNumberOfCompositions, 3404 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3404, positive: 3404, positive conditional: 0, positive unconditional: 3404, 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: 3404, positive: 3404, positive conditional: 0, positive unconditional: 3404, 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: 3404, positive: 3404, positive conditional: 0, positive unconditional: 3404, 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: 3404, positive: 2072, positive conditional: 0, positive unconditional: 2072, negative: 1332, negative conditional: 0, negative unconditional: 1332, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 1332, positive: 1332, positive conditional: 0, positive unconditional: 1332, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 1656, positive: 1656, positive conditional: 0, positive unconditional: 1656, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 3404, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 3404, unknown conditional: 0, unknown unconditional: 3404] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1980.8ms, 194 PlacesBefore, 156 PlacesAfterwards, 117 TransitionsBefore, 79 TransitionsAfterwards, 8740 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 38 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 38 TotalNumberOfCompositions, 3591 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3591, positive: 3591, positive conditional: 0, positive unconditional: 3591, 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: 3591, positive: 3591, positive conditional: 0, positive unconditional: 3591, 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: 3591, positive: 3591, positive conditional: 0, positive unconditional: 3591, 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: 3591, positive: 2185, positive conditional: 0, positive unconditional: 2185, negative: 1406, negative conditional: 0, negative unconditional: 1406, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 1406, positive: 1406, positive conditional: 0, positive unconditional: 1406, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 1723, positive: 1723, positive conditional: 0, positive unconditional: 1723, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 3591, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 3591, unknown conditional: 0, unknown unconditional: 3591] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2077.0ms, 199 PlacesBefore, 160 PlacesAfterwards, 120 TransitionsBefore, 81 TransitionsAfterwards, 9204 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 39 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 39 TotalNumberOfCompositions, 3783 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3783, positive: 3783, positive conditional: 0, positive unconditional: 3783, 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: 3783, positive: 3783, positive conditional: 0, positive unconditional: 3783, 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: 3783, positive: 3783, positive conditional: 0, positive unconditional: 3783, 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: 3783, positive: 2301, positive conditional: 0, positive unconditional: 2301, negative: 1482, negative conditional: 0, negative unconditional: 1482, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 1482, positive: 1482, positive conditional: 0, positive unconditional: 1482, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 1858, positive: 1858, positive conditional: 0, positive unconditional: 1858, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 3783, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 3783, unknown conditional: 0, unknown unconditional: 3783] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2180.8ms, 204 PlacesBefore, 164 PlacesAfterwards, 123 TransitionsBefore, 83 TransitionsAfterwards, 9680 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 40 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 40 TotalNumberOfCompositions, 3980 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3980, positive: 3980, positive conditional: 0, positive unconditional: 3980, 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: 3980, positive: 3980, positive conditional: 0, positive unconditional: 3980, 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: 3980, positive: 3980, positive conditional: 0, positive unconditional: 3980, 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: 3980, positive: 2420, positive conditional: 0, positive unconditional: 2420, negative: 1560, negative conditional: 0, negative unconditional: 1560, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 1560, positive: 1560, positive conditional: 0, positive unconditional: 1560, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 1950, positive: 1950, positive conditional: 0, positive unconditional: 1950, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 3980, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 3980, unknown conditional: 0, unknown unconditional: 3980] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2315.4ms, 209 PlacesBefore, 168 PlacesAfterwards, 126 TransitionsBefore, 85 TransitionsAfterwards, 10168 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 41 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 41 TotalNumberOfCompositions, 4182 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4182, positive: 4182, positive conditional: 0, positive unconditional: 4182, 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: 4182, positive: 4182, positive conditional: 0, positive unconditional: 4182, 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: 4182, positive: 4182, positive conditional: 0, positive unconditional: 4182, 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: 4182, positive: 2542, positive conditional: 0, positive unconditional: 2542, negative: 1640, negative conditional: 0, negative unconditional: 1640, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 1640, positive: 1640, positive conditional: 0, positive unconditional: 1640, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 2076, positive: 2076, positive conditional: 0, positive unconditional: 2076, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 4182, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 4182, unknown conditional: 0, unknown unconditional: 4182] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2434.3ms, 214 PlacesBefore, 172 PlacesAfterwards, 129 TransitionsBefore, 87 TransitionsAfterwards, 10668 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 42 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 42 TotalNumberOfCompositions, 4389 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4389, positive: 4389, positive conditional: 0, positive unconditional: 4389, 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: 4389, positive: 4389, positive conditional: 0, positive unconditional: 4389, 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: 4389, positive: 4389, positive conditional: 0, positive unconditional: 4389, 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: 4389, positive: 2667, positive conditional: 0, positive unconditional: 2667, negative: 1722, negative conditional: 0, negative unconditional: 1722, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 1722, positive: 1722, positive conditional: 0, positive unconditional: 1722, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 2190, positive: 2190, positive conditional: 0, positive unconditional: 2190, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 4389, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 4389, unknown conditional: 0, unknown unconditional: 4389] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2571.8ms, 219 PlacesBefore, 176 PlacesAfterwards, 132 TransitionsBefore, 89 TransitionsAfterwards, 11180 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 43 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 43 TotalNumberOfCompositions, 4601 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4601, positive: 4601, positive conditional: 0, positive unconditional: 4601, 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: 4601, positive: 4601, positive conditional: 0, positive unconditional: 4601, 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: 4601, positive: 4601, positive conditional: 0, positive unconditional: 4601, 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: 4601, positive: 2795, positive conditional: 0, positive unconditional: 2795, negative: 1806, negative conditional: 0, negative unconditional: 1806, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 1806, positive: 1806, positive conditional: 0, positive unconditional: 1806, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 2321, positive: 2321, positive conditional: 0, positive unconditional: 2321, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 4601, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 4601, unknown conditional: 0, unknown unconditional: 4601] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2749.5ms, 224 PlacesBefore, 180 PlacesAfterwards, 135 TransitionsBefore, 91 TransitionsAfterwards, 11704 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 44 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 44 TotalNumberOfCompositions, 4818 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4818, positive: 4818, positive conditional: 0, positive unconditional: 4818, 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: 4818, positive: 4818, positive conditional: 0, positive unconditional: 4818, 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: 4818, positive: 4818, positive conditional: 0, positive unconditional: 4818, 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: 4818, positive: 2926, positive conditional: 0, positive unconditional: 2926, negative: 1892, negative conditional: 0, negative unconditional: 1892, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 1892, positive: 1892, positive conditional: 0, positive unconditional: 1892, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 2476, positive: 2476, positive conditional: 0, positive unconditional: 2476, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 4818, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 4818, unknown conditional: 0, unknown unconditional: 4818] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2948.3ms, 229 PlacesBefore, 184 PlacesAfterwards, 138 TransitionsBefore, 93 TransitionsAfterwards, 12240 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 45 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 45 TotalNumberOfCompositions, 5040 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 5040, positive: 5040, positive conditional: 0, positive unconditional: 5040, 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: 5040, positive: 5040, positive conditional: 0, positive unconditional: 5040, 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: 5040, positive: 5040, positive conditional: 0, positive unconditional: 5040, 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: 5040, positive: 3060, positive conditional: 0, positive unconditional: 3060, negative: 1980, negative conditional: 0, negative unconditional: 1980, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 1980, positive: 1980, positive conditional: 0, positive unconditional: 1980, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 2653, positive: 2653, positive conditional: 0, positive unconditional: 2653, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 5040, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 5040, unknown conditional: 0, unknown unconditional: 5040] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3005.9ms, 234 PlacesBefore, 188 PlacesAfterwards, 141 TransitionsBefore, 95 TransitionsAfterwards, 12788 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 46 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 46 TotalNumberOfCompositions, 5267 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 5267, positive: 5267, positive conditional: 0, positive unconditional: 5267, 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: 5267, positive: 5267, positive conditional: 0, positive unconditional: 5267, 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: 5267, positive: 5267, positive conditional: 0, positive unconditional: 5267, 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: 5267, positive: 3197, positive conditional: 0, positive unconditional: 3197, negative: 2070, negative conditional: 0, negative unconditional: 2070, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 2070, positive: 2070, positive conditional: 0, positive unconditional: 2070, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 2709, positive: 2709, positive conditional: 0, positive unconditional: 2709, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 5267, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 5267, unknown conditional: 0, unknown unconditional: 5267] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3133.6ms, 239 PlacesBefore, 192 PlacesAfterwards, 144 TransitionsBefore, 97 TransitionsAfterwards, 13348 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 47 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 47 TotalNumberOfCompositions, 5499 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 5499, positive: 5499, positive conditional: 0, positive unconditional: 5499, 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: 5499, positive: 5499, positive conditional: 0, positive unconditional: 5499, 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: 5499, positive: 5499, positive conditional: 0, positive unconditional: 5499, 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: 5499, positive: 3337, positive conditional: 0, positive unconditional: 3337, negative: 2162, negative conditional: 0, negative unconditional: 2162, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 2162, positive: 2162, positive conditional: 0, positive unconditional: 2162, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 2832, positive: 2832, positive conditional: 0, positive unconditional: 2832, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 5499, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 5499, unknown conditional: 0, unknown unconditional: 5499] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3235.0ms, 244 PlacesBefore, 196 PlacesAfterwards, 147 TransitionsBefore, 99 TransitionsAfterwards, 13920 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 48 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 48 TotalNumberOfCompositions, 5736 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 5736, positive: 5736, positive conditional: 0, positive unconditional: 5736, 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: 5736, positive: 5736, positive conditional: 0, positive unconditional: 5736, 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: 5736, positive: 5736, positive conditional: 0, positive unconditional: 5736, 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: 5736, positive: 3480, positive conditional: 0, positive unconditional: 3480, negative: 2256, negative conditional: 0, negative unconditional: 2256, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 2256, positive: 2256, positive conditional: 0, positive unconditional: 2256, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 2925, positive: 2925, positive conditional: 0, positive unconditional: 2925, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 5736, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 5736, unknown conditional: 0, unknown unconditional: 5736] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3416.4ms, 249 PlacesBefore, 200 PlacesAfterwards, 150 TransitionsBefore, 101 TransitionsAfterwards, 14504 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 49 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 49 TotalNumberOfCompositions, 5978 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 5978, positive: 5978, positive conditional: 0, positive unconditional: 5978, 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: 5978, positive: 5978, positive conditional: 0, positive unconditional: 5978, 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: 5978, positive: 5978, positive conditional: 0, positive unconditional: 5978, 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: 5978, positive: 3626, positive conditional: 0, positive unconditional: 3626, negative: 2352, negative conditional: 0, negative unconditional: 2352, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 2352, positive: 2352, positive conditional: 0, positive unconditional: 2352, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 3113, positive: 3113, positive conditional: 0, positive unconditional: 3113, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 5978, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 5978, unknown conditional: 0, unknown unconditional: 5978] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3628.2ms, 254 PlacesBefore, 204 PlacesAfterwards, 153 TransitionsBefore, 103 TransitionsAfterwards, 15100 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 50 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 50 TotalNumberOfCompositions, 6225 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 6225, positive: 6225, positive conditional: 0, positive unconditional: 6225, 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: 6225, positive: 6225, positive conditional: 0, positive unconditional: 6225, 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: 6225, positive: 6225, positive conditional: 0, positive unconditional: 6225, 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: 6225, positive: 3775, positive conditional: 0, positive unconditional: 3775, negative: 2450, negative conditional: 0, negative unconditional: 2450, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 2450, positive: 2450, positive conditional: 0, positive unconditional: 2450, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 3287, positive: 3287, positive conditional: 0, positive unconditional: 3287, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 6225, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 6225, unknown conditional: 0, unknown unconditional: 6225] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3796.7ms, 259 PlacesBefore, 208 PlacesAfterwards, 156 TransitionsBefore, 105 TransitionsAfterwards, 15708 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 51 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 51 TotalNumberOfCompositions, 6477 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 6477, positive: 6477, positive conditional: 0, positive unconditional: 6477, 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: 6477, positive: 6477, positive conditional: 0, positive unconditional: 6477, 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: 6477, positive: 6477, positive conditional: 0, positive unconditional: 6477, 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: 6477, positive: 3927, positive conditional: 0, positive unconditional: 3927, negative: 2550, negative conditional: 0, negative unconditional: 2550, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 2550, positive: 2550, positive conditional: 0, positive unconditional: 2550, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 3430, positive: 3430, positive conditional: 0, positive unconditional: 3430, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 6477, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 6477, unknown conditional: 0, unknown unconditional: 6477] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4181.9ms, 264 PlacesBefore, 212 PlacesAfterwards, 159 TransitionsBefore, 107 TransitionsAfterwards, 16328 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 52 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 52 TotalNumberOfCompositions, 6734 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 6734, positive: 6734, positive conditional: 0, positive unconditional: 6734, 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: 6734, positive: 6734, positive conditional: 0, positive unconditional: 6734, 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: 6734, positive: 6734, positive conditional: 0, positive unconditional: 6734, 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: 6734, positive: 4082, positive conditional: 0, positive unconditional: 4082, negative: 2652, negative conditional: 0, negative unconditional: 2652, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 2652, positive: 2652, positive conditional: 0, positive unconditional: 2652, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 3716, positive: 3716, positive conditional: 0, positive unconditional: 3716, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 6734, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 6734, unknown conditional: 0, unknown unconditional: 6734] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4371.7ms, 269 PlacesBefore, 216 PlacesAfterwards, 162 TransitionsBefore, 109 TransitionsAfterwards, 16960 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 53 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 53 TotalNumberOfCompositions, 6996 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 6996, positive: 6996, positive conditional: 0, positive unconditional: 6996, 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: 6996, positive: 6996, positive conditional: 0, positive unconditional: 6996, 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: 6996, positive: 6996, positive conditional: 0, positive unconditional: 6996, 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: 6996, positive: 4240, positive conditional: 0, positive unconditional: 4240, negative: 2756, negative conditional: 0, negative unconditional: 2756, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 2756, positive: 2756, positive conditional: 0, positive unconditional: 2756, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 3989, positive: 3989, positive conditional: 0, positive unconditional: 3989, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 6996, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 6996, unknown conditional: 0, unknown unconditional: 6996] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4251.6ms, 274 PlacesBefore, 220 PlacesAfterwards, 165 TransitionsBefore, 111 TransitionsAfterwards, 17604 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 54 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 54 TotalNumberOfCompositions, 7263 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 7263, positive: 7263, positive conditional: 0, positive unconditional: 7263, 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: 7263, positive: 7263, positive conditional: 0, positive unconditional: 7263, 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: 7263, positive: 7263, positive conditional: 0, positive unconditional: 7263, 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: 7263, positive: 4401, positive conditional: 0, positive unconditional: 4401, negative: 2862, negative conditional: 0, negative unconditional: 2862, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 2862, positive: 2862, positive conditional: 0, positive unconditional: 2862, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 3865, positive: 3865, positive conditional: 0, positive unconditional: 3865, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 7263, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 7263, unknown conditional: 0, unknown unconditional: 7263] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4381.4ms, 279 PlacesBefore, 224 PlacesAfterwards, 168 TransitionsBefore, 113 TransitionsAfterwards, 18260 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 55 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 55 TotalNumberOfCompositions, 7535 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 7535, positive: 7535, positive conditional: 0, positive unconditional: 7535, 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: 7535, positive: 7535, positive conditional: 0, positive unconditional: 7535, 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: 7535, positive: 7535, positive conditional: 0, positive unconditional: 7535, 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: 7535, positive: 4565, positive conditional: 0, positive unconditional: 4565, negative: 2970, negative conditional: 0, negative unconditional: 2970, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 2970, positive: 2970, positive conditional: 0, positive unconditional: 2970, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 3987, positive: 3987, positive conditional: 0, positive unconditional: 3987, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 7535, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 7535, unknown conditional: 0, unknown unconditional: 7535] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4696.8ms, 284 PlacesBefore, 228 PlacesAfterwards, 171 TransitionsBefore, 115 TransitionsAfterwards, 18928 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 56 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 56 TotalNumberOfCompositions, 7812 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 7812, positive: 7812, positive conditional: 0, positive unconditional: 7812, 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: 7812, positive: 7812, positive conditional: 0, positive unconditional: 7812, 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: 7812, positive: 7812, positive conditional: 0, positive unconditional: 7812, 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: 7812, positive: 4732, positive conditional: 0, positive unconditional: 4732, negative: 3080, negative conditional: 0, negative unconditional: 3080, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 3080, positive: 3080, positive conditional: 0, positive unconditional: 3080, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 4145, positive: 4145, positive conditional: 0, positive unconditional: 4145, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 7812, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 7812, unknown conditional: 0, unknown unconditional: 7812] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4763.7ms, 289 PlacesBefore, 232 PlacesAfterwards, 174 TransitionsBefore, 117 TransitionsAfterwards, 19608 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 57 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 57 TotalNumberOfCompositions, 8094 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 8094, positive: 8094, positive conditional: 0, positive unconditional: 8094, 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: 8094, positive: 8094, positive conditional: 0, positive unconditional: 8094, 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: 8094, positive: 8094, positive conditional: 0, positive unconditional: 8094, 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: 8094, positive: 4902, positive conditional: 0, positive unconditional: 4902, negative: 3192, negative conditional: 0, negative unconditional: 3192, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 3192, positive: 3192, positive conditional: 0, positive unconditional: 3192, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 4368, positive: 4368, positive conditional: 0, positive unconditional: 4368, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 8094, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 8094, unknown conditional: 0, unknown unconditional: 8094] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5225.8ms, 294 PlacesBefore, 236 PlacesAfterwards, 177 TransitionsBefore, 119 TransitionsAfterwards, 20300 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 58 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 58 TotalNumberOfCompositions, 8381 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 8381, positive: 8381, positive conditional: 0, positive unconditional: 8381, 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: 8381, positive: 8381, positive conditional: 0, positive unconditional: 8381, 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: 8381, positive: 8381, positive conditional: 0, positive unconditional: 8381, 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: 8381, positive: 5075, positive conditional: 0, positive unconditional: 5075, negative: 3306, negative conditional: 0, negative unconditional: 3306, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 3306, positive: 3306, positive conditional: 0, positive unconditional: 3306, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 4797, positive: 4797, positive conditional: 0, positive unconditional: 4797, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 8381, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 8381, unknown conditional: 0, unknown unconditional: 8381] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5249.2ms, 299 PlacesBefore, 240 PlacesAfterwards, 180 TransitionsBefore, 121 TransitionsAfterwards, 21004 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 59 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 59 TotalNumberOfCompositions, 8673 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 8673, positive: 8673, positive conditional: 0, positive unconditional: 8673, 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: 8673, positive: 8673, positive conditional: 0, positive unconditional: 8673, 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: 8673, positive: 8673, positive conditional: 0, positive unconditional: 8673, 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: 8673, positive: 5251, positive conditional: 0, positive unconditional: 5251, negative: 3422, negative conditional: 0, negative unconditional: 3422, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 3422, positive: 3422, positive conditional: 0, positive unconditional: 3422, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 4673, positive: 4673, positive conditional: 0, positive unconditional: 4673, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 8673, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 8673, unknown conditional: 0, unknown unconditional: 8673] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5404.4ms, 304 PlacesBefore, 244 PlacesAfterwards, 183 TransitionsBefore, 123 TransitionsAfterwards, 21720 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 60 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 60 TotalNumberOfCompositions, 8970 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 8970, positive: 8970, positive conditional: 0, positive unconditional: 8970, 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: 8970, positive: 8970, positive conditional: 0, positive unconditional: 8970, 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: 8970, positive: 8970, positive conditional: 0, positive unconditional: 8970, 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: 8970, positive: 5430, positive conditional: 0, positive unconditional: 5430, negative: 3540, negative conditional: 0, negative unconditional: 3540, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 3540, positive: 3540, positive conditional: 0, positive unconditional: 3540, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 4965, positive: 4965, positive conditional: 0, positive unconditional: 4965, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 8970, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 8970, unknown conditional: 0, unknown unconditional: 8970] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5600.9ms, 309 PlacesBefore, 248 PlacesAfterwards, 186 TransitionsBefore, 125 TransitionsAfterwards, 22448 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 61 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 61 TotalNumberOfCompositions, 9272 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 9272, positive: 9272, positive conditional: 0, positive unconditional: 9272, 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: 9272, positive: 9272, positive conditional: 0, positive unconditional: 9272, 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: 9272, positive: 9272, positive conditional: 0, positive unconditional: 9272, 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: 9272, positive: 5612, positive conditional: 0, positive unconditional: 5612, negative: 3660, negative conditional: 0, negative unconditional: 3660, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 3660, positive: 3660, positive conditional: 0, positive unconditional: 3660, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 5162, positive: 5162, positive conditional: 0, positive unconditional: 5162, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 9272, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 9272, unknown conditional: 0, unknown unconditional: 9272] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 6059.1ms, 314 PlacesBefore, 252 PlacesAfterwards, 189 TransitionsBefore, 127 TransitionsAfterwards, 23188 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 62 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 62 TotalNumberOfCompositions, 9579 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 9579, positive: 9579, positive conditional: 0, positive unconditional: 9579, 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: 9579, positive: 9579, positive conditional: 0, positive unconditional: 9579, 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: 9579, positive: 9579, positive conditional: 0, positive unconditional: 9579, 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: 9579, positive: 5797, positive conditional: 0, positive unconditional: 5797, negative: 3782, negative conditional: 0, negative unconditional: 3782, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 3782, positive: 3782, positive conditional: 0, positive unconditional: 3782, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 5590, positive: 5590, positive conditional: 0, positive unconditional: 5590, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 9579, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 9579, unknown conditional: 0, unknown unconditional: 9579] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 6186.9ms, 319 PlacesBefore, 256 PlacesAfterwards, 192 TransitionsBefore, 129 TransitionsAfterwards, 23940 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 63 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 63 TotalNumberOfCompositions, 9891 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 9891, positive: 9891, positive conditional: 0, positive unconditional: 9891, 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: 9891, positive: 9891, positive conditional: 0, positive unconditional: 9891, 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: 9891, positive: 9891, positive conditional: 0, positive unconditional: 9891, 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: 9891, positive: 5985, positive conditional: 0, positive unconditional: 5985, negative: 3906, negative conditional: 0, negative unconditional: 3906, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 3906, positive: 3906, positive conditional: 0, positive unconditional: 3906, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 5696, positive: 5696, positive conditional: 0, positive unconditional: 5696, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 9891, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 9891, unknown conditional: 0, unknown unconditional: 9891] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 6341.5ms, 324 PlacesBefore, 260 PlacesAfterwards, 195 TransitionsBefore, 131 TransitionsAfterwards, 24704 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 64 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 64 TotalNumberOfCompositions, 10208 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 10208, positive: 10208, positive conditional: 0, positive unconditional: 10208, 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: 10208, positive: 10208, positive conditional: 0, positive unconditional: 10208, 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: 10208, positive: 10208, positive conditional: 0, positive unconditional: 10208, 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: 10208, positive: 6176, positive conditional: 0, positive unconditional: 6176, negative: 4032, negative conditional: 0, negative unconditional: 4032, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 4032, positive: 4032, positive conditional: 0, positive unconditional: 4032, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 5861, positive: 5861, positive conditional: 0, positive unconditional: 5861, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 10208, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 10208, unknown conditional: 0, unknown unconditional: 10208] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 6607.1ms, 329 PlacesBefore, 264 PlacesAfterwards, 198 TransitionsBefore, 133 TransitionsAfterwards, 25480 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 65 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 65 TotalNumberOfCompositions, 10530 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 10530, positive: 10530, positive conditional: 0, positive unconditional: 10530, 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: 10530, positive: 10530, positive conditional: 0, positive unconditional: 10530, 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: 10530, positive: 10530, positive conditional: 0, positive unconditional: 10530, 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: 10530, positive: 6370, positive conditional: 0, positive unconditional: 6370, negative: 4160, negative conditional: 0, negative unconditional: 4160, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 4160, positive: 4160, positive conditional: 0, positive unconditional: 4160, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 6112, positive: 6112, positive conditional: 0, positive unconditional: 6112, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 10530, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 10530, unknown conditional: 0, unknown unconditional: 10530] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 7327.5ms, 334 PlacesBefore, 268 PlacesAfterwards, 201 TransitionsBefore, 135 TransitionsAfterwards, 26268 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 66 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 66 TotalNumberOfCompositions, 10857 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 10857, positive: 10857, positive conditional: 0, positive unconditional: 10857, 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: 10857, positive: 10857, positive conditional: 0, positive unconditional: 10857, 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: 10857, positive: 10857, positive conditional: 0, positive unconditional: 10857, 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: 10857, positive: 6567, positive conditional: 0, positive unconditional: 6567, negative: 4290, negative conditional: 0, negative unconditional: 4290, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 4290, positive: 4290, positive conditional: 0, positive unconditional: 4290, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 6797, positive: 6797, positive conditional: 0, positive unconditional: 6797, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 10857, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 10857, unknown conditional: 0, unknown unconditional: 10857] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 7432.2ms, 339 PlacesBefore, 272 PlacesAfterwards, 204 TransitionsBefore, 137 TransitionsAfterwards, 27068 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 67 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 67 TotalNumberOfCompositions, 11189 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 11189, positive: 11189, positive conditional: 0, positive unconditional: 11189, 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: 11189, positive: 11189, positive conditional: 0, positive unconditional: 11189, 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: 11189, positive: 11189, positive conditional: 0, positive unconditional: 11189, 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: 11189, positive: 6767, positive conditional: 0, positive unconditional: 6767, negative: 4422, negative conditional: 0, negative unconditional: 4422, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 4422, positive: 4422, positive conditional: 0, positive unconditional: 4422, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 6722, positive: 6722, positive conditional: 0, positive unconditional: 6722, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 11189, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 11189, unknown conditional: 0, unknown unconditional: 11189] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 8002.1ms, 344 PlacesBefore, 276 PlacesAfterwards, 207 TransitionsBefore, 139 TransitionsAfterwards, 27880 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 68 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 68 TotalNumberOfCompositions, 11526 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 11526, positive: 11526, positive conditional: 0, positive unconditional: 11526, 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: 11526, positive: 11526, positive conditional: 0, positive unconditional: 11526, 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: 11526, positive: 11526, positive conditional: 0, positive unconditional: 11526, 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: 11526, positive: 6970, positive conditional: 0, positive unconditional: 6970, negative: 4556, negative conditional: 0, negative unconditional: 4556, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 4556, positive: 4556, positive conditional: 0, positive unconditional: 4556, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 7408, positive: 7408, positive conditional: 0, positive unconditional: 7408, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 11526, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 11526, unknown conditional: 0, unknown unconditional: 11526] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 8435.4ms, 349 PlacesBefore, 280 PlacesAfterwards, 210 TransitionsBefore, 141 TransitionsAfterwards, 28704 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 69 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 69 TotalNumberOfCompositions, 11868 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 11868, positive: 11868, positive conditional: 0, positive unconditional: 11868, 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: 11868, positive: 11868, positive conditional: 0, positive unconditional: 11868, 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: 11868, positive: 11868, positive conditional: 0, positive unconditional: 11868, 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: 11868, positive: 7176, positive conditional: 0, positive unconditional: 7176, negative: 4692, negative conditional: 0, negative unconditional: 4692, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 4692, positive: 4692, positive conditional: 0, positive unconditional: 4692, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 7820, positive: 7820, positive conditional: 0, positive unconditional: 7820, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 11868, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 11868, unknown conditional: 0, unknown unconditional: 11868] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 8873.2ms, 354 PlacesBefore, 284 PlacesAfterwards, 213 TransitionsBefore, 143 TransitionsAfterwards, 29540 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 70 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 70 TotalNumberOfCompositions, 12215 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 12215, positive: 12215, positive conditional: 0, positive unconditional: 12215, 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: 12215, positive: 12215, positive conditional: 0, positive unconditional: 12215, 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: 12215, positive: 12215, positive conditional: 0, positive unconditional: 12215, 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: 12215, positive: 7385, positive conditional: 0, positive unconditional: 7385, negative: 4830, negative conditional: 0, negative unconditional: 4830, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 4830, positive: 4830, positive conditional: 0, positive unconditional: 4830, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 8232, positive: 8232, positive conditional: 0, positive unconditional: 8232, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 12215, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 12215, unknown conditional: 0, unknown unconditional: 12215] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 9234.3ms, 359 PlacesBefore, 288 PlacesAfterwards, 216 TransitionsBefore, 145 TransitionsAfterwards, 30388 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 71 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 71 TotalNumberOfCompositions, 12567 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 12567, positive: 12567, positive conditional: 0, positive unconditional: 12567, 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: 12567, positive: 12567, positive conditional: 0, positive unconditional: 12567, 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: 12567, positive: 12567, positive conditional: 0, positive unconditional: 12567, 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: 12567, positive: 7597, positive conditional: 0, positive unconditional: 7597, negative: 4970, negative conditional: 0, negative unconditional: 4970, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 4970, positive: 4970, positive conditional: 0, positive unconditional: 4970, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 8570, positive: 8570, positive conditional: 0, positive unconditional: 8570, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 12567, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 12567, unknown conditional: 0, unknown unconditional: 12567] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 10011.0ms, 364 PlacesBefore, 292 PlacesAfterwards, 219 TransitionsBefore, 147 TransitionsAfterwards, 31248 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 72 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 72 TotalNumberOfCompositions, 12924 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 12924, positive: 12924, positive conditional: 0, positive unconditional: 12924, 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: 12924, positive: 12924, positive conditional: 0, positive unconditional: 12924, 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: 12924, positive: 12924, positive conditional: 0, positive unconditional: 12924, 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: 12924, positive: 7812, positive conditional: 0, positive unconditional: 7812, negative: 5112, negative conditional: 0, negative unconditional: 5112, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 5112, positive: 5112, positive conditional: 0, positive unconditional: 5112, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 9304, positive: 9304, positive conditional: 0, positive unconditional: 9304, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 12924, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 12924, unknown conditional: 0, unknown unconditional: 12924] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 10605.4ms, 369 PlacesBefore, 296 PlacesAfterwards, 222 TransitionsBefore, 149 TransitionsAfterwards, 32120 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 73 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 73 TotalNumberOfCompositions, 13286 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 13286, positive: 13286, positive conditional: 0, positive unconditional: 13286, 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: 13286, positive: 13286, positive conditional: 0, positive unconditional: 13286, 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: 13286, positive: 13286, positive conditional: 0, positive unconditional: 13286, 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: 13286, positive: 8030, positive conditional: 0, positive unconditional: 8030, negative: 5256, negative conditional: 0, negative unconditional: 5256, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 5256, positive: 5256, positive conditional: 0, positive unconditional: 5256, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 9847, positive: 9847, positive conditional: 0, positive unconditional: 9847, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 13286, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 13286, unknown conditional: 0, unknown unconditional: 13286] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 11241.0ms, 374 PlacesBefore, 300 PlacesAfterwards, 225 TransitionsBefore, 151 TransitionsAfterwards, 33004 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 74 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 74 TotalNumberOfCompositions, 13653 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 13653, positive: 13653, positive conditional: 0, positive unconditional: 13653, 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: 13653, positive: 13653, positive conditional: 0, positive unconditional: 13653, 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: 13653, positive: 13653, positive conditional: 0, positive unconditional: 13653, 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: 13653, positive: 8251, positive conditional: 0, positive unconditional: 8251, negative: 5402, negative conditional: 0, negative unconditional: 5402, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 5402, positive: 5402, positive conditional: 0, positive unconditional: 5402, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 10459, positive: 10459, positive conditional: 0, positive unconditional: 10459, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 13653, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 13653, unknown conditional: 0, unknown unconditional: 13653] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 11753.6ms, 379 PlacesBefore, 304 PlacesAfterwards, 228 TransitionsBefore, 153 TransitionsAfterwards, 33900 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 75 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 75 TotalNumberOfCompositions, 14025 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 14025, positive: 14025, positive conditional: 0, positive unconditional: 14025, 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: 14025, positive: 14025, positive conditional: 0, positive unconditional: 14025, 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: 14025, positive: 14025, positive conditional: 0, positive unconditional: 14025, 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: 14025, positive: 8475, positive conditional: 0, positive unconditional: 8475, negative: 5550, negative conditional: 0, negative unconditional: 5550, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 5550, positive: 5550, positive conditional: 0, positive unconditional: 5550, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 10791, positive: 10791, positive conditional: 0, positive unconditional: 10791, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 14025, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 14025, unknown conditional: 0, unknown unconditional: 14025] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 12605.2ms, 384 PlacesBefore, 308 PlacesAfterwards, 231 TransitionsBefore, 155 TransitionsAfterwards, 34808 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 76 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 76 TotalNumberOfCompositions, 14402 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 14402, positive: 14402, positive conditional: 0, positive unconditional: 14402, 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: 14402, positive: 14402, positive conditional: 0, positive unconditional: 14402, 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: 14402, positive: 14402, positive conditional: 0, positive unconditional: 14402, 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: 14402, positive: 8702, positive conditional: 0, positive unconditional: 8702, negative: 5700, negative conditional: 0, negative unconditional: 5700, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 5700, positive: 5700, positive conditional: 0, positive unconditional: 5700, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 11520, positive: 11520, positive conditional: 0, positive unconditional: 11520, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 14402, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 14402, unknown conditional: 0, unknown unconditional: 14402] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 12407.1ms, 389 PlacesBefore, 312 PlacesAfterwards, 234 TransitionsBefore, 157 TransitionsAfterwards, 35728 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 77 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 77 TotalNumberOfCompositions, 14784 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 14784, positive: 14784, positive conditional: 0, positive unconditional: 14784, 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: 14784, positive: 14784, positive conditional: 0, positive unconditional: 14784, 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: 14784, positive: 14784, positive conditional: 0, positive unconditional: 14784, 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: 14784, positive: 8932, positive conditional: 0, positive unconditional: 8932, negative: 5852, negative conditional: 0, negative unconditional: 5852, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 5852, positive: 5852, positive conditional: 0, positive unconditional: 5852, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 11547, positive: 11547, positive conditional: 0, positive unconditional: 11547, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 14784, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 14784, unknown conditional: 0, unknown unconditional: 14784] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 14249.9ms, 394 PlacesBefore, 316 PlacesAfterwards, 237 TransitionsBefore, 159 TransitionsAfterwards, 36660 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 78 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 78 TotalNumberOfCompositions, 15171 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 15171, positive: 15171, positive conditional: 0, positive unconditional: 15171, 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: 15171, positive: 15171, positive conditional: 0, positive unconditional: 15171, 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: 15171, positive: 15171, positive conditional: 0, positive unconditional: 15171, 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: 15171, positive: 9165, positive conditional: 0, positive unconditional: 9165, negative: 6006, negative conditional: 0, negative unconditional: 6006, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 6006, positive: 6006, positive conditional: 0, positive unconditional: 6006, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 13055, positive: 13055, positive conditional: 0, positive unconditional: 13055, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 15171, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 15171, unknown conditional: 0, unknown unconditional: 15171] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 15653.1ms, 399 PlacesBefore, 320 PlacesAfterwards, 240 TransitionsBefore, 161 TransitionsAfterwards, 37604 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 79 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 79 TotalNumberOfCompositions, 15563 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 15563, positive: 15563, positive conditional: 0, positive unconditional: 15563, 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: 15563, positive: 15563, positive conditional: 0, positive unconditional: 15563, 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: 15563, positive: 15563, positive conditional: 0, positive unconditional: 15563, 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: 15563, positive: 9401, positive conditional: 0, positive unconditional: 9401, negative: 6162, negative conditional: 0, negative unconditional: 6162, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 6162, positive: 6162, positive conditional: 0, positive unconditional: 6162, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 14437, positive: 14437, positive conditional: 0, positive unconditional: 14437, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 15563, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 15563, unknown conditional: 0, unknown unconditional: 15563] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 16329.7ms, 404 PlacesBefore, 324 PlacesAfterwards, 243 TransitionsBefore, 163 TransitionsAfterwards, 38560 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 80 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 80 TotalNumberOfCompositions, 15960 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 15960, positive: 15960, positive conditional: 0, positive unconditional: 15960, 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: 15960, positive: 15960, positive conditional: 0, positive unconditional: 15960, 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: 15960, positive: 15960, positive conditional: 0, positive unconditional: 15960, 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: 15960, positive: 9640, positive conditional: 0, positive unconditional: 9640, negative: 6320, negative conditional: 0, negative unconditional: 6320, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 6320, positive: 6320, positive conditional: 0, positive unconditional: 6320, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 15164, positive: 15164, positive conditional: 0, positive unconditional: 15164, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 15960, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 15960, unknown conditional: 0, unknown unconditional: 15960] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 17665.9ms, 409 PlacesBefore, 328 PlacesAfterwards, 246 TransitionsBefore, 165 TransitionsAfterwards, 39528 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 81 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 81 TotalNumberOfCompositions, 16362 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 16362, positive: 16362, positive conditional: 0, positive unconditional: 16362, 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: 16362, positive: 16362, positive conditional: 0, positive unconditional: 16362, 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: 16362, positive: 16362, positive conditional: 0, positive unconditional: 16362, 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: 16362, positive: 9882, positive conditional: 0, positive unconditional: 9882, negative: 6480, negative conditional: 0, negative unconditional: 6480, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 6480, positive: 6480, positive conditional: 0, positive unconditional: 6480, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 16474, positive: 16474, positive conditional: 0, positive unconditional: 16474, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 16362, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 16362, unknown conditional: 0, unknown unconditional: 16362] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 19568.0ms, 414 PlacesBefore, 332 PlacesAfterwards, 249 TransitionsBefore, 167 TransitionsAfterwards, 40508 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 82 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 82 TotalNumberOfCompositions, 16769 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 16769, positive: 16769, positive conditional: 0, positive unconditional: 16769, 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: 16769, positive: 16769, positive conditional: 0, positive unconditional: 16769, 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: 16769, positive: 16769, positive conditional: 0, positive unconditional: 16769, 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: 16769, positive: 10127, positive conditional: 0, positive unconditional: 10127, negative: 6642, negative conditional: 0, negative unconditional: 6642, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 6642, positive: 6642, positive conditional: 0, positive unconditional: 6642, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 18227, positive: 18227, positive conditional: 0, positive unconditional: 18227, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 16769, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 16769, unknown conditional: 0, unknown unconditional: 16769] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 20525.7ms, 419 PlacesBefore, 336 PlacesAfterwards, 252 TransitionsBefore, 169 TransitionsAfterwards, 41500 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 83 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 83 TotalNumberOfCompositions, 17181 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 17181, positive: 17181, positive conditional: 0, positive unconditional: 17181, 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: 17181, positive: 17181, positive conditional: 0, positive unconditional: 17181, 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: 17181, positive: 17181, positive conditional: 0, positive unconditional: 17181, 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: 17181, positive: 10375, positive conditional: 0, positive unconditional: 10375, negative: 6806, negative conditional: 0, negative unconditional: 6806, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 6806, positive: 6806, positive conditional: 0, positive unconditional: 6806, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 19148, positive: 19148, positive conditional: 0, positive unconditional: 19148, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 17181, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 17181, unknown conditional: 0, unknown unconditional: 17181] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 22440.7ms, 424 PlacesBefore, 340 PlacesAfterwards, 255 TransitionsBefore, 171 TransitionsAfterwards, 42504 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 84 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 84 TotalNumberOfCompositions, 17598 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 17598, positive: 17598, positive conditional: 0, positive unconditional: 17598, 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: 17598, positive: 17598, positive conditional: 0, positive unconditional: 17598, 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: 17598, positive: 17598, positive conditional: 0, positive unconditional: 17598, 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: 17598, positive: 10626, positive conditional: 0, positive unconditional: 10626, negative: 6972, negative conditional: 0, negative unconditional: 6972, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 6972, positive: 6972, positive conditional: 0, positive unconditional: 6972, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 20936, positive: 20936, positive conditional: 0, positive unconditional: 20936, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 17598, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 17598, unknown conditional: 0, unknown unconditional: 17598] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 23623.7ms, 429 PlacesBefore, 344 PlacesAfterwards, 258 TransitionsBefore, 173 TransitionsAfterwards, 43520 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 85 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 85 TotalNumberOfCompositions, 18020 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 18020, positive: 18020, positive conditional: 0, positive unconditional: 18020, 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: 18020, positive: 18020, positive conditional: 0, positive unconditional: 18020, 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: 18020, positive: 18020, positive conditional: 0, positive unconditional: 18020, 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: 18020, positive: 10880, positive conditional: 0, positive unconditional: 10880, negative: 7140, negative conditional: 0, negative unconditional: 7140, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 7140, positive: 7140, positive conditional: 0, positive unconditional: 7140, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 22031, positive: 22031, positive conditional: 0, positive unconditional: 22031, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 18020, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 18020, unknown conditional: 0, unknown unconditional: 18020] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 24937.2ms, 434 PlacesBefore, 348 PlacesAfterwards, 261 TransitionsBefore, 175 TransitionsAfterwards, 44548 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 86 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 86 TotalNumberOfCompositions, 18447 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 18447, positive: 18447, positive conditional: 0, positive unconditional: 18447, 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: 18447, positive: 18447, positive conditional: 0, positive unconditional: 18447, 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: 18447, positive: 18447, positive conditional: 0, positive unconditional: 18447, 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: 18447, positive: 11137, positive conditional: 0, positive unconditional: 11137, negative: 7310, negative conditional: 0, negative unconditional: 7310, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 7310, positive: 7310, positive conditional: 0, positive unconditional: 7310, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 23277, positive: 23277, positive conditional: 0, positive unconditional: 23277, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 18447, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 18447, unknown conditional: 0, unknown unconditional: 18447] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 26663.0ms, 439 PlacesBefore, 352 PlacesAfterwards, 264 TransitionsBefore, 177 TransitionsAfterwards, 45588 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 87 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 87 TotalNumberOfCompositions, 18879 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 18879, positive: 18879, positive conditional: 0, positive unconditional: 18879, 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: 18879, positive: 18879, positive conditional: 0, positive unconditional: 18879, 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: 18879, positive: 18879, positive conditional: 0, positive unconditional: 18879, 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: 18879, positive: 11397, positive conditional: 0, positive unconditional: 11397, negative: 7482, negative conditional: 0, negative unconditional: 7482, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 7482, positive: 7482, positive conditional: 0, positive unconditional: 7482, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 24891, positive: 24891, positive conditional: 0, positive unconditional: 24891, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 18879, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 18879, unknown conditional: 0, unknown unconditional: 18879] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 28557.8ms, 444 PlacesBefore, 356 PlacesAfterwards, 267 TransitionsBefore, 179 TransitionsAfterwards, 46640 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 88 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 88 TotalNumberOfCompositions, 19316 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 19316, positive: 19316, positive conditional: 0, positive unconditional: 19316, 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: 19316, positive: 19316, positive conditional: 0, positive unconditional: 19316, 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: 19316, positive: 19316, positive conditional: 0, positive unconditional: 19316, 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: 19316, positive: 11660, positive conditional: 0, positive unconditional: 11660, negative: 7656, negative conditional: 0, negative unconditional: 7656, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 7656, positive: 7656, positive conditional: 0, positive unconditional: 7656, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 26666, positive: 26666, positive conditional: 0, positive unconditional: 26666, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 19316, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 19316, unknown conditional: 0, unknown unconditional: 19316] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 30197.5ms, 449 PlacesBefore, 360 PlacesAfterwards, 270 TransitionsBefore, 181 TransitionsAfterwards, 47704 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 89 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 89 TotalNumberOfCompositions, 19758 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 19758, positive: 19758, positive conditional: 0, positive unconditional: 19758, 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: 19758, positive: 19758, positive conditional: 0, positive unconditional: 19758, 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: 19758, positive: 19758, positive conditional: 0, positive unconditional: 19758, 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: 19758, positive: 11926, positive conditional: 0, positive unconditional: 11926, negative: 7832, negative conditional: 0, negative unconditional: 7832, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 7832, positive: 7832, positive conditional: 0, positive unconditional: 7832, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 28208, positive: 28208, positive conditional: 0, positive unconditional: 28208, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 19758, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 19758, unknown conditional: 0, unknown unconditional: 19758] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 33079.1ms, 454 PlacesBefore, 364 PlacesAfterwards, 273 TransitionsBefore, 183 TransitionsAfterwards, 48780 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 90 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 90 TotalNumberOfCompositions, 20205 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 20205, positive: 20205, positive conditional: 0, positive unconditional: 20205, 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: 20205, positive: 20205, positive conditional: 0, positive unconditional: 20205, 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: 20205, positive: 20205, positive conditional: 0, positive unconditional: 20205, 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: 20205, positive: 12195, positive conditional: 0, positive unconditional: 12195, negative: 8010, negative conditional: 0, negative unconditional: 8010, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 8010, positive: 8010, positive conditional: 0, positive unconditional: 8010, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 30926, positive: 30926, positive conditional: 0, positive unconditional: 30926, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 20205, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 20205, unknown conditional: 0, unknown unconditional: 20205] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 32512.3ms, 459 PlacesBefore, 368 PlacesAfterwards, 276 TransitionsBefore, 185 TransitionsAfterwards, 49868 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 91 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 91 TotalNumberOfCompositions, 20657 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 20657, positive: 20657, positive conditional: 0, positive unconditional: 20657, 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: 20657, positive: 20657, positive conditional: 0, positive unconditional: 20657, 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: 20657, positive: 20657, positive conditional: 0, positive unconditional: 20657, 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: 20657, positive: 12467, positive conditional: 0, positive unconditional: 12467, negative: 8190, negative conditional: 0, negative unconditional: 8190, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 8190, positive: 8190, positive conditional: 0, positive unconditional: 8190, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 30400, positive: 30400, positive conditional: 0, positive unconditional: 30400, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 20657, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 20657, unknown conditional: 0, unknown unconditional: 20657] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 36971.1ms, 464 PlacesBefore, 372 PlacesAfterwards, 279 TransitionsBefore, 187 TransitionsAfterwards, 50968 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 92 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 92 TotalNumberOfCompositions, 21114 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 21114, positive: 21114, positive conditional: 0, positive unconditional: 21114, 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: 21114, positive: 21114, positive conditional: 0, positive unconditional: 21114, 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: 21114, positive: 21114, positive conditional: 0, positive unconditional: 21114, 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: 21114, positive: 12742, positive conditional: 0, positive unconditional: 12742, negative: 8372, negative conditional: 0, negative unconditional: 8372, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 8372, positive: 8372, positive conditional: 0, positive unconditional: 8372, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 34598, positive: 34598, positive conditional: 0, positive unconditional: 34598, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 21114, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 21114, unknown conditional: 0, unknown unconditional: 21114] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 40251.8ms, 469 PlacesBefore, 376 PlacesAfterwards, 282 TransitionsBefore, 189 TransitionsAfterwards, 52080 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 93 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 93 TotalNumberOfCompositions, 21576 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 21576, positive: 21576, positive conditional: 0, positive unconditional: 21576, 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: 21576, positive: 21576, positive conditional: 0, positive unconditional: 21576, 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: 21576, positive: 21576, positive conditional: 0, positive unconditional: 21576, 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: 21576, positive: 13020, positive conditional: 0, positive unconditional: 13020, negative: 8556, negative conditional: 0, negative unconditional: 8556, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 8556, positive: 8556, positive conditional: 0, positive unconditional: 8556, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 37660, positive: 37660, positive conditional: 0, positive unconditional: 37660, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 21576, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 21576, unknown conditional: 0, unknown unconditional: 21576] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 41858.1ms, 474 PlacesBefore, 380 PlacesAfterwards, 285 TransitionsBefore, 191 TransitionsAfterwards, 53204 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 94 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 94 TotalNumberOfCompositions, 22043 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 22043, positive: 22043, positive conditional: 0, positive unconditional: 22043, 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: 22043, positive: 22043, positive conditional: 0, positive unconditional: 22043, 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: 22043, positive: 22043, positive conditional: 0, positive unconditional: 22043, 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: 22043, positive: 13301, positive conditional: 0, positive unconditional: 13301, negative: 8742, negative conditional: 0, negative unconditional: 8742, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 8742, positive: 8742, positive conditional: 0, positive unconditional: 8742, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 39152, positive: 39152, positive conditional: 0, positive unconditional: 39152, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 22043, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 22043, unknown conditional: 0, unknown unconditional: 22043] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - TimeoutResultAtElement [Line: 30]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 30). Cancelled while CegarLoopForPetriNet was constructing initial abstraction,while PetriNetLargeBlockEncoding was applying PetriNetLargeBlockEncoding to Petri net that has 479 places, 288 transitions, 9981 flow,while LiptonReduction was applying LiptonReduction to Petri net that has 479 places, 288 transitions, 9981 flow and 54340 co-enabled transitions pairs.,while XnfDer was eliminating 1 quantified variables from 2 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 8 locations, 1 error locations. Started 95 CEGAR loops. EmptinessCheckTime: 57.3ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 756341.7ms, OverallIterations: 188, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 9717.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 742658.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 94 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 94 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 294.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=9594occurred in iteration=0, InterpolantAutomatonStates: 282, 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: 83.4ms SsaConstructionTime, 231.9ms SatisfiabilityAnalysisTime, 646.1ms InterpolantComputationTime, 4841 NumberOfCodeBlocks, 4841 NumberOfCodeBlocksAsserted, 188 NumberOfCheckSat, 94 ConstructedInterpolants, 0 QuantifiedInterpolants, 282 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 94 InterpolantComputations, 94 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 could not prove your program: Timeout Completed graceful shutdown