/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/mcr/example_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-24 22:35:15,207 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-24 22:35:15,210 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-24 22:35:15,246 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-24 22:35:15,265 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-24 22:35:15,267 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-24 22:35:15,268 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-24 22:35:15,269 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-24 22:35:15,271 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-24 22:35:15,272 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-24 22:35:15,274 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-24 22:35:15,284 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-24 22:35:15,285 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-24 22:35:15,286 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-24 22:35:15,287 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-24 22:35:15,289 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-24 22:35:15,295 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-24 22:35:15,305 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 22:35:15,340 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-24 22:35:15,341 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-24 22:35:15,344 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-24 22:35:15,344 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-24 22:35:15,344 INFO L138 SettingsManager]: * Use SBE=true [2021-03-24 22:35:15,345 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-24 22:35:15,345 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-24 22:35:15,345 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-24 22:35:15,345 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-24 22:35:15,345 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-24 22:35:15,346 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-24 22:35:15,346 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-24 22:35:15,346 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-24 22:35:15,346 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-24 22:35:15,347 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-24 22:35:15,347 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-24 22:35:15,347 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-24 22:35:15,347 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-24 22:35:15,347 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-24 22:35:15,347 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-24 22:35:15,348 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-24 22:35:15,348 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-24 22:35:15,348 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-24 22:35:15,348 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-24 22:35:15,348 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-24 22:35:15,348 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-24 22:35:15,348 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-24 22:35:15,349 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-24 22:35:15,349 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-24 22:35:15,657 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-24 22:35:15,690 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-24 22:35:15,692 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-24 22:35:15,693 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-24 22:35:15,694 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-24 22:35:15,695 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_4.bpl [2021-03-24 22:35:15,695 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_4.bpl' [2021-03-24 22:35:15,718 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-24 22:35:15,720 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-24 22:35:15,721 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-24 22:35:15,721 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-24 22:35:15,721 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-24 22:35:15,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:35:15" (1/1) ... [2021-03-24 22:35:15,738 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:35:15" (1/1) ... [2021-03-24 22:35:15,743 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-24 22:35:15,745 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-24 22:35:15,745 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-24 22:35:15,745 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-24 22:35:15,752 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:35:15" (1/1) ... [2021-03-24 22:35:15,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:35:15" (1/1) ... [2021-03-24 22:35:15,752 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:35:15" (1/1) ... [2021-03-24 22:35:15,753 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:35:15" (1/1) ... [2021-03-24 22:35:15,754 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:35:15" (1/1) ... [2021-03-24 22:35:15,755 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:35:15" (1/1) ... [2021-03-24 22:35:15,755 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:35:15" (1/1) ... [2021-03-24 22:35:15,756 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-24 22:35:15,756 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-24 22:35:15,757 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-24 22:35:15,757 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-24 22:35:15,758 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:35:15" (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 22:35:15,813 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_1 given in one single declaration [2021-03-24 22:35:15,813 INFO L130 BoogieDeclarations]: Found specification of procedure set_1 [2021-03-24 22:35:15,813 INFO L138 BoogieDeclarations]: Found implementation of procedure set_1 [2021-03-24 22:35:15,813 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_2 given in one single declaration [2021-03-24 22:35:15,813 INFO L130 BoogieDeclarations]: Found specification of procedure set_2 [2021-03-24 22:35:15,814 INFO L138 BoogieDeclarations]: Found implementation of procedure set_2 [2021-03-24 22:35:15,814 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_3 given in one single declaration [2021-03-24 22:35:15,814 INFO L130 BoogieDeclarations]: Found specification of procedure set_3 [2021-03-24 22:35:15,814 INFO L138 BoogieDeclarations]: Found implementation of procedure set_3 [2021-03-24 22:35:15,814 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_0 given in one single declaration [2021-03-24 22:35:15,814 INFO L130 BoogieDeclarations]: Found specification of procedure set_0 [2021-03-24 22:35:15,814 INFO L138 BoogieDeclarations]: Found implementation of procedure set_0 [2021-03-24 22:35:15,814 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-24 22:35:15,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-24 22:35:15,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-24 22:35:15,815 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 22:35:15,972 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-24 22:35:15,973 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-24 22:35:15,974 INFO L202 PluginConnector]: Adding new model example_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 10:35:15 BoogieIcfgContainer [2021-03-24 22:35:15,974 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-24 22:35:15,975 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-24 22:35:15,975 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-24 22:35:15,977 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-24 22:35:15,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:35:15" (1/2) ... [2021-03-24 22:35:15,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6307bc28 and model type example_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.03 10:35:15, skipping insertion in model container [2021-03-24 22:35:15,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 10:35:15" (2/2) ... [2021-03-24 22:35:15,983 INFO L111 eAbstractionObserver]: Analyzing ICFG example_4.bpl [2021-03-24 22:35:15,992 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-24 22:35:15,996 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-24 22:35:15,996 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-24 22:35:16,082 INFO L149 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2021-03-24 22:35:16,098 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-03-24 22:35:16,146 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:35:16,147 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:35:16,147 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:35:16,147 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:35:16,147 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:35:16,147 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:35:16,147 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:35:16,147 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:35:16,156 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 36 places, 35 transitions, 138 flow [2021-03-24 22:35:16,201 INFO L129 PetriNetUnfolder]: 17/47 cut-off events. [2021-03-24 22:35:16,201 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-03-24 22:35:16,206 INFO L84 FinitePrefix]: Finished finitePrefix Result has 92 conditions, 47 events. 17/47 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 122 event pairs, 0 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 41. Up to 12 conditions per place. [2021-03-24 22:35:16,206 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 35 transitions, 138 flow [2021-03-24 22:35:16,211 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 29 transitions, 118 flow [2021-03-24 22:35:16,212 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:35:16,226 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 30 places, 29 transitions, 118 flow [2021-03-24 22:35:16,233 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 30 places, 29 transitions, 118 flow [2021-03-24 22:35:16,234 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 30 places, 29 transitions, 118 flow [2021-03-24 22:35:16,258 INFO L129 PetriNetUnfolder]: 17/45 cut-off events. [2021-03-24 22:35:16,259 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-03-24 22:35:16,259 INFO L84 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 45 events. 17/45 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 108 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 41. Up to 12 conditions per place. [2021-03-24 22:35:16,261 INFO L142 LiptonReduction]: Number of co-enabled transitions 216 [2021-03-24 22:35:16,330 INFO L154 LiptonReduction]: Checked pairs total: 66 [2021-03-24 22:35:16,331 INFO L156 LiptonReduction]: Total number of compositions: 4 [2021-03-24 22:35:16,332 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 121 [2021-03-24 22:35:16,360 INFO L129 PetriNetUnfolder]: 17/40 cut-off events. [2021-03-24 22:35:16,360 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-03-24 22:35:16,360 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:35:16,361 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:35:16,361 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:35:16,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:35:16,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1888322031, now seen corresponding path program 1 times [2021-03-24 22:35:16,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:35:16,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400928811] [2021-03-24 22:35:16,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:35:16,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:35:16,471 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:16,472 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 22:35:16,481 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:16,481 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:35:16,487 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:16,487 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 22:35:16,489 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 22:35:16,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400928811] [2021-03-24 22:35:16,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:35:16,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 22:35:16,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545111532] [2021-03-24 22:35:16,496 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:35:16,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:35:16,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:35:16,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:35:16,507 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 39 [2021-03-24 22:35:16,508 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 110 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 22:35:16,509 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:35:16,509 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 39 [2021-03-24 22:35:16,510 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:35:16,526 INFO L129 PetriNetUnfolder]: 14/37 cut-off events. [2021-03-24 22:35:16,526 INFO L130 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2021-03-24 22:35:16,527 INFO L84 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 37 events. 14/37 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 70 event pairs, 0 based on Foata normal form. 1/38 useless extension candidates. Maximal degree in co-relation 35. Up to 12 conditions per place. [2021-03-24 22:35:16,528 INFO L132 encePairwiseOnDemand]: 37/39 looper letters, 3 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2021-03-24 22:35:16,528 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 24 transitions, 113 flow [2021-03-24 22:35:16,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:35:16,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:35:16,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2021-03-24 22:35:16,537 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9145299145299145 [2021-03-24 22:35:16,538 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 107 transitions. [2021-03-24 22:35:16,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 107 transitions. [2021-03-24 22:35:16,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:35:16,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 107 transitions. [2021-03-24 22:35:16,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:16,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:16,546 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:16,548 INFO L185 Difference]: Start difference. First operand has 26 places, 25 transitions, 110 flow. Second operand 3 states and 107 transitions. [2021-03-24 22:35:16,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 24 transitions, 113 flow [2021-03-24 22:35:16,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 24 transitions, 75 flow, removed 0 selfloop flow, removed 8 redundant places. [2021-03-24 22:35:16,554 INFO L241 Difference]: Finished difference. Result has 20 places, 24 transitions, 69 flow [2021-03-24 22:35:16,555 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=18, 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=69, PETRI_PLACES=20, PETRI_TRANSITIONS=24} [2021-03-24 22:35:16,556 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, -6 predicate places. [2021-03-24 22:35:16,556 INFO L480 AbstractCegarLoop]: Abstraction has has 20 places, 24 transitions, 69 flow [2021-03-24 22:35:16,556 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 22:35:16,556 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:35:16,556 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:35:16,557 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-24 22:35:16,557 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:35:16,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:35:16,557 INFO L82 PathProgramCache]: Analyzing trace with hash -153583415, now seen corresponding path program 1 times [2021-03-24 22:35:16,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:35:16,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058968478] [2021-03-24 22:35:16,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:35:16,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:35:16,576 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:16,576 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 22:35:16,577 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:16,577 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:35:16,581 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:16,581 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 22:35:16,582 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 22:35:16,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058968478] [2021-03-24 22:35:16,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:35:16,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 22:35:16,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789449391] [2021-03-24 22:35:16,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:35:16,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:35:16,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:35:16,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:35:16,585 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 39 [2021-03-24 22:35:16,585 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 24 transitions, 69 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 22:35:16,585 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:35:16,585 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 39 [2021-03-24 22:35:16,585 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:35:16,594 INFO L129 PetriNetUnfolder]: 6/25 cut-off events. [2021-03-24 22:35:16,595 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-03-24 22:35:16,595 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38 conditions, 25 events. 6/25 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 38 event pairs, 0 based on Foata normal form. 3/28 useless extension candidates. Maximal degree in co-relation 30. Up to 6 conditions per place. [2021-03-24 22:35:16,595 INFO L132 encePairwiseOnDemand]: 36/39 looper letters, 2 selfloop transitions, 1 changer transitions 0/22 dead transitions. [2021-03-24 22:35:16,595 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 22 transitions, 69 flow [2021-03-24 22:35:16,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:35:16,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:35:16,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2021-03-24 22:35:16,597 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9145299145299145 [2021-03-24 22:35:16,597 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 107 transitions. [2021-03-24 22:35:16,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 107 transitions. [2021-03-24 22:35:16,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:35:16,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 107 transitions. [2021-03-24 22:35:16,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:16,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:16,600 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:16,600 INFO L185 Difference]: Start difference. First operand has 20 places, 24 transitions, 69 flow. Second operand 3 states and 107 transitions. [2021-03-24 22:35:16,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 22 transitions, 69 flow [2021-03-24 22:35:16,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 22 transitions, 68 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-24 22:35:16,601 INFO L241 Difference]: Finished difference. Result has 21 places, 22 transitions, 64 flow [2021-03-24 22:35:16,601 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=19, 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=64, PETRI_PLACES=21, PETRI_TRANSITIONS=22} [2021-03-24 22:35:16,602 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, -5 predicate places. [2021-03-24 22:35:16,602 INFO L480 AbstractCegarLoop]: Abstraction has has 21 places, 22 transitions, 64 flow [2021-03-24 22:35:16,602 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 22:35:16,602 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:35:16,602 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:35:16,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-24 22:35:16,603 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:35:16,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:35:16,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1587378979, now seen corresponding path program 1 times [2021-03-24 22:35:16,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:35:16,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695710801] [2021-03-24 22:35:16,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:35:16,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:35:16,623 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:16,624 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 22:35:16,626 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:16,626 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:35:16,630 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:16,631 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 22:35:16,631 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 22:35:16,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695710801] [2021-03-24 22:35:16,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:35:16,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 22:35:16,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479768276] [2021-03-24 22:35:16,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:35:16,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:35:16,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:35:16,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:35:16,634 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 39 [2021-03-24 22:35:16,634 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 22 transitions, 64 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 22:35:16,635 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:35:16,635 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 39 [2021-03-24 22:35:16,635 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:35:16,647 INFO L129 PetriNetUnfolder]: 0/13 cut-off events. [2021-03-24 22:35:16,647 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-03-24 22:35:16,647 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24 conditions, 13 events. 0/13 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 8 event pairs, 0 based on Foata normal form. 3/16 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-24 22:35:16,648 INFO L132 encePairwiseOnDemand]: 35/39 looper letters, 1 selfloop transitions, 1 changer transitions 0/13 dead transitions. [2021-03-24 22:35:16,648 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 13 transitions, 41 flow [2021-03-24 22:35:16,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:35:16,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:35:16,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2021-03-24 22:35:16,649 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9145299145299145 [2021-03-24 22:35:16,649 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 107 transitions. [2021-03-24 22:35:16,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 107 transitions. [2021-03-24 22:35:16,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:35:16,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 107 transitions. [2021-03-24 22:35:16,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:16,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:16,652 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:16,652 INFO L185 Difference]: Start difference. First operand has 21 places, 22 transitions, 64 flow. Second operand 3 states and 107 transitions. [2021-03-24 22:35:16,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 13 transitions, 41 flow [2021-03-24 22:35:16,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 13 transitions, 40 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-24 22:35:16,653 INFO L241 Difference]: Finished difference. Result has 22 places, 13 transitions, 38 flow [2021-03-24 22:35:16,653 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=38, PETRI_PLACES=22, PETRI_TRANSITIONS=13} [2021-03-24 22:35:16,654 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, -4 predicate places. [2021-03-24 22:35:16,654 INFO L480 AbstractCegarLoop]: Abstraction has has 22 places, 13 transitions, 38 flow [2021-03-24 22:35:16,654 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 22:35:16,654 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:35:16,654 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:35:16,654 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-24 22:35:16,654 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:35:16,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:35:16,655 INFO L82 PathProgramCache]: Analyzing trace with hash -136113801, now seen corresponding path program 1 times [2021-03-24 22:35:16,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:35:16,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942876250] [2021-03-24 22:35:16,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:35:16,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:35:16,692 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:16,693 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 22:35:16,704 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:16,705 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 22:35:16,723 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:16,726 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 22:35:16,741 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-03-24 22:35:16,752 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-03-24 22:35:16,771 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-24 22:35:16,773 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-24 22:35:16,788 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 22:35:16,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942876250] [2021-03-24 22:35:16,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:35:16,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 22:35:16,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968633744] [2021-03-24 22:35:16,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 22:35:16,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:35:16,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 22:35:16,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-24 22:35:16,791 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-03-24 22:35:16,792 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 13 transitions, 38 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:16,792 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:35:16,792 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-03-24 22:35:16,792 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:35:16,878 INFO L129 PetriNetUnfolder]: 15/65 cut-off events. [2021-03-24 22:35:16,878 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:35:16,879 INFO L84 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 65 events. 15/65 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 249 event pairs, 5 based on Foata normal form. 1/61 useless extension candidates. Maximal degree in co-relation 107. Up to 17 conditions per place. [2021-03-24 22:35:16,882 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 9 selfloop transitions, 3 changer transitions 1/21 dead transitions. [2021-03-24 22:35:16,882 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 80 flow [2021-03-24 22:35:16,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 22:35:16,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 22:35:16,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-03-24 22:35:16,889 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8034188034188035 [2021-03-24 22:35:16,889 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-03-24 22:35:16,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-03-24 22:35:16,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:35:16,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-03-24 22:35:16,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 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 22:35:16,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:16,898 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:16,898 INFO L185 Difference]: Start difference. First operand has 22 places, 13 transitions, 38 flow. Second operand 6 states and 188 transitions. [2021-03-24 22:35:16,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 80 flow [2021-03-24 22:35:16,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 21 transitions, 79 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-24 22:35:16,900 INFO L241 Difference]: Finished difference. Result has 30 places, 15 transitions, 60 flow [2021-03-24 22:35:16,900 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=60, PETRI_PLACES=30, PETRI_TRANSITIONS=15} [2021-03-24 22:35:16,901 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 4 predicate places. [2021-03-24 22:35:16,901 INFO L480 AbstractCegarLoop]: Abstraction has has 30 places, 15 transitions, 60 flow [2021-03-24 22:35:16,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:16,902 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:35:16,902 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:35:16,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-24 22:35:16,905 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:35:16,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:35:16,906 INFO L82 PathProgramCache]: Analyzing trace with hash -816343229, now seen corresponding path program 2 times [2021-03-24 22:35:16,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:35:16,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464842614] [2021-03-24 22:35:16,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:35:16,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:35:16,951 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:16,952 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 22:35:16,953 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:16,953 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 22:35:16,959 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:16,960 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 22:35:16,972 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-03-24 22:35:16,973 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-03-24 22:35:16,990 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-24 22:35:16,991 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-24 22:35:17,006 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 22:35:17,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464842614] [2021-03-24 22:35:17,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:35:17,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 22:35:17,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077009802] [2021-03-24 22:35:17,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 22:35:17,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:35:17,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 22:35:17,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-24 22:35:17,009 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-03-24 22:35:17,009 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 15 transitions, 60 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:17,009 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:35:17,009 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-03-24 22:35:17,009 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:35:17,055 INFO L129 PetriNetUnfolder]: 11/87 cut-off events. [2021-03-24 22:35:17,055 INFO L130 PetriNetUnfolder]: For 72/80 co-relation queries the response was YES. [2021-03-24 22:35:17,056 INFO L84 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 87 events. 11/87 cut-off events. For 72/80 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 436 event pairs, 3 based on Foata normal form. 1/81 useless extension candidates. Maximal degree in co-relation 194. Up to 22 conditions per place. [2021-03-24 22:35:17,056 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 11 selfloop transitions, 5 changer transitions 2/26 dead transitions. [2021-03-24 22:35:17,056 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 26 transitions, 149 flow [2021-03-24 22:35:17,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 22:35:17,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 22:35:17,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-03-24 22:35:17,058 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8034188034188035 [2021-03-24 22:35:17,058 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-03-24 22:35:17,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-03-24 22:35:17,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:35:17,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-03-24 22:35:17,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 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 22:35:17,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:17,060 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:17,060 INFO L185 Difference]: Start difference. First operand has 30 places, 15 transitions, 60 flow. Second operand 6 states and 188 transitions. [2021-03-24 22:35:17,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 26 transitions, 149 flow [2021-03-24 22:35:17,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 26 transitions, 139 flow, removed 3 selfloop flow, removed 2 redundant places. [2021-03-24 22:35:17,062 INFO L241 Difference]: Finished difference. Result has 36 places, 19 transitions, 108 flow [2021-03-24 22:35:17,062 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=108, PETRI_PLACES=36, PETRI_TRANSITIONS=19} [2021-03-24 22:35:17,063 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 10 predicate places. [2021-03-24 22:35:17,063 INFO L480 AbstractCegarLoop]: Abstraction has has 36 places, 19 transitions, 108 flow [2021-03-24 22:35:17,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:17,063 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:35:17,063 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:35:17,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-24 22:35:17,064 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:35:17,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:35:17,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1390381937, now seen corresponding path program 3 times [2021-03-24 22:35:17,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:35:17,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969389642] [2021-03-24 22:35:17,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:35:17,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:35:17,092 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:17,092 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 22:35:17,093 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:17,094 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 22:35:17,100 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-03-24 22:35:17,101 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-03-24 22:35:17,111 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-03-24 22:35:17,112 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-03-24 22:35:17,127 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-24 22:35:17,128 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-24 22:35:17,142 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 22:35:17,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969389642] [2021-03-24 22:35:17,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:35:17,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 22:35:17,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261565559] [2021-03-24 22:35:17,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 22:35:17,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:35:17,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 22:35:17,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-24 22:35:17,145 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-03-24 22:35:17,145 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 19 transitions, 108 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:17,145 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:35:17,145 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-03-24 22:35:17,146 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:35:17,205 INFO L129 PetriNetUnfolder]: 10/95 cut-off events. [2021-03-24 22:35:17,205 INFO L130 PetriNetUnfolder]: For 171/177 co-relation queries the response was YES. [2021-03-24 22:35:17,206 INFO L84 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 95 events. 10/95 cut-off events. For 171/177 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 509 event pairs, 2 based on Foata normal form. 1/91 useless extension candidates. Maximal degree in co-relation 262. Up to 25 conditions per place. [2021-03-24 22:35:17,206 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 12 selfloop transitions, 9 changer transitions 1/30 dead transitions. [2021-03-24 22:35:17,206 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 30 transitions, 225 flow [2021-03-24 22:35:17,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 22:35:17,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 22:35:17,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-03-24 22:35:17,208 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8034188034188035 [2021-03-24 22:35:17,208 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-03-24 22:35:17,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-03-24 22:35:17,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:35:17,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-03-24 22:35:17,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 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 22:35:17,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:17,211 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:17,211 INFO L185 Difference]: Start difference. First operand has 36 places, 19 transitions, 108 flow. Second operand 6 states and 188 transitions. [2021-03-24 22:35:17,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 30 transitions, 225 flow [2021-03-24 22:35:17,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 30 transitions, 215 flow, removed 3 selfloop flow, removed 2 redundant places. [2021-03-24 22:35:17,217 INFO L241 Difference]: Finished difference. Result has 42 places, 24 transitions, 189 flow [2021-03-24 22:35:17,218 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=189, PETRI_PLACES=42, PETRI_TRANSITIONS=24} [2021-03-24 22:35:17,218 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 16 predicate places. [2021-03-24 22:35:17,218 INFO L480 AbstractCegarLoop]: Abstraction has has 42 places, 24 transitions, 189 flow [2021-03-24 22:35:17,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:17,218 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:35:17,218 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:35:17,219 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-24 22:35:17,219 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:35:17,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:35:17,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1130172361, now seen corresponding path program 4 times [2021-03-24 22:35:17,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:35:17,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119845415] [2021-03-24 22:35:17,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:35:17,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:35:17,268 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:17,268 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 22:35:17,269 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:17,270 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 22:35:17,274 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:17,275 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 22:35:17,284 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-03-24 22:35:17,284 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-03-24 22:35:17,298 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-24 22:35:17,299 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-24 22:35:17,313 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 22:35:17,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119845415] [2021-03-24 22:35:17,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:35:17,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 22:35:17,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083277157] [2021-03-24 22:35:17,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 22:35:17,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:35:17,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 22:35:17,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-24 22:35:17,315 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-03-24 22:35:17,316 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 24 transitions, 189 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:17,316 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:35:17,316 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-03-24 22:35:17,316 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:35:17,367 INFO L129 PetriNetUnfolder]: 8/101 cut-off events. [2021-03-24 22:35:17,367 INFO L130 PetriNetUnfolder]: For 315/323 co-relation queries the response was YES. [2021-03-24 22:35:17,369 INFO L84 FinitePrefix]: Finished finitePrefix Result has 340 conditions, 101 events. 8/101 cut-off events. For 315/323 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 580 event pairs, 6 based on Foata normal form. 1/100 useless extension candidates. Maximal degree in co-relation 322. Up to 23 conditions per place. [2021-03-24 22:35:17,370 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 13 selfloop transitions, 11 changer transitions 2/34 dead transitions. [2021-03-24 22:35:17,370 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 34 transitions, 320 flow [2021-03-24 22:35:17,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 22:35:17,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 22:35:17,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-03-24 22:35:17,372 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8034188034188035 [2021-03-24 22:35:17,372 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-03-24 22:35:17,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-03-24 22:35:17,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:35:17,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-03-24 22:35:17,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 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 22:35:17,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:17,374 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:17,374 INFO L185 Difference]: Start difference. First operand has 42 places, 24 transitions, 189 flow. Second operand 6 states and 188 transitions. [2021-03-24 22:35:17,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 34 transitions, 320 flow [2021-03-24 22:35:17,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 34 transitions, 303 flow, removed 5 selfloop flow, removed 2 redundant places. [2021-03-24 22:35:17,386 INFO L241 Difference]: Finished difference. Result has 48 places, 26 transitions, 241 flow [2021-03-24 22:35:17,386 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=241, PETRI_PLACES=48, PETRI_TRANSITIONS=26} [2021-03-24 22:35:17,386 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 22 predicate places. [2021-03-24 22:35:17,386 INFO L480 AbstractCegarLoop]: Abstraction has has 48 places, 26 transitions, 241 flow [2021-03-24 22:35:17,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:17,387 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:35:17,387 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:35:17,387 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-24 22:35:17,387 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:35:17,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:35:17,388 INFO L82 PathProgramCache]: Analyzing trace with hash 892919981, now seen corresponding path program 5 times [2021-03-24 22:35:17,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:35:17,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428709631] [2021-03-24 22:35:17,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:35:17,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:35:17,417 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:17,417 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 22:35:17,418 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:17,418 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 22:35:17,423 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:17,423 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 22:35:17,431 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-03-24 22:35:17,433 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-03-24 22:35:17,446 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-24 22:35:17,447 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-24 22:35:17,459 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 22:35:17,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428709631] [2021-03-24 22:35:17,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:35:17,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 22:35:17,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984018228] [2021-03-24 22:35:17,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 22:35:17,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:35:17,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 22:35:17,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-24 22:35:17,461 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-03-24 22:35:17,462 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 26 transitions, 241 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:17,462 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:35:17,462 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-03-24 22:35:17,462 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:35:17,513 INFO L129 PetriNetUnfolder]: 7/99 cut-off events. [2021-03-24 22:35:17,513 INFO L130 PetriNetUnfolder]: For 450/460 co-relation queries the response was YES. [2021-03-24 22:35:17,514 INFO L84 FinitePrefix]: Finished finitePrefix Result has 382 conditions, 99 events. 7/99 cut-off events. For 450/460 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 567 event pairs, 5 based on Foata normal form. 3/98 useless extension candidates. Maximal degree in co-relation 361. Up to 22 conditions per place. [2021-03-24 22:35:17,515 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 11 selfloop transitions, 12 changer transitions 4/35 dead transitions. [2021-03-24 22:35:17,515 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 35 transitions, 379 flow [2021-03-24 22:35:17,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 22:35:17,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 22:35:17,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-03-24 22:35:17,517 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8034188034188035 [2021-03-24 22:35:17,517 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-03-24 22:35:17,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-03-24 22:35:17,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:35:17,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-03-24 22:35:17,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 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 22:35:17,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:17,518 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:17,518 INFO L185 Difference]: Start difference. First operand has 48 places, 26 transitions, 241 flow. Second operand 6 states and 188 transitions. [2021-03-24 22:35:17,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 35 transitions, 379 flow [2021-03-24 22:35:17,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 35 transitions, 349 flow, removed 10 selfloop flow, removed 3 redundant places. [2021-03-24 22:35:17,522 INFO L241 Difference]: Finished difference. Result has 53 places, 27 transitions, 279 flow [2021-03-24 22:35:17,522 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=279, PETRI_PLACES=53, PETRI_TRANSITIONS=27} [2021-03-24 22:35:17,522 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 27 predicate places. [2021-03-24 22:35:17,523 INFO L480 AbstractCegarLoop]: Abstraction has has 53 places, 27 transitions, 279 flow [2021-03-24 22:35:17,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:17,523 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:35:17,523 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:35:17,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-24 22:35:17,523 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:35:17,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:35:17,524 INFO L82 PathProgramCache]: Analyzing trace with hash 2125071045, now seen corresponding path program 6 times [2021-03-24 22:35:17,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:35:17,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87189258] [2021-03-24 22:35:17,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:35:17,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:35:17,575 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:17,578 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 22:35:17,579 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:17,579 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 22:35:17,585 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-03-24 22:35:17,587 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-03-24 22:35:17,608 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-03-24 22:35:17,609 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-03-24 22:35:17,625 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-24 22:35:17,626 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-24 22:35:17,640 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 22:35:17,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87189258] [2021-03-24 22:35:17,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:35:17,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 22:35:17,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051377059] [2021-03-24 22:35:17,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 22:35:17,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:35:17,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 22:35:17,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-24 22:35:17,646 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-03-24 22:35:17,648 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 27 transitions, 279 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:17,648 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:35:17,649 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-03-24 22:35:17,649 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:35:17,699 INFO L129 PetriNetUnfolder]: 6/90 cut-off events. [2021-03-24 22:35:17,700 INFO L130 PetriNetUnfolder]: For 574/600 co-relation queries the response was YES. [2021-03-24 22:35:17,700 INFO L84 FinitePrefix]: Finished finitePrefix Result has 384 conditions, 90 events. 6/90 cut-off events. For 574/600 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 499 event pairs, 6 based on Foata normal form. 6/93 useless extension candidates. Maximal degree in co-relation 361. Up to 23 conditions per place. [2021-03-24 22:35:17,701 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 10 selfloop transitions, 14 changer transitions 1/33 dead transitions. [2021-03-24 22:35:17,701 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 33 transitions, 389 flow [2021-03-24 22:35:17,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 22:35:17,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 22:35:17,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-03-24 22:35:17,702 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8034188034188035 [2021-03-24 22:35:17,702 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-03-24 22:35:17,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-03-24 22:35:17,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:35:17,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-03-24 22:35:17,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 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 22:35:17,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:17,704 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:17,705 INFO L185 Difference]: Start difference. First operand has 53 places, 27 transitions, 279 flow. Second operand 6 states and 188 transitions. [2021-03-24 22:35:17,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 33 transitions, 389 flow [2021-03-24 22:35:17,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 33 transitions, 343 flow, removed 16 selfloop flow, removed 5 redundant places. [2021-03-24 22:35:17,708 INFO L241 Difference]: Finished difference. Result has 56 places, 29 transitions, 325 flow [2021-03-24 22:35:17,708 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=325, PETRI_PLACES=56, PETRI_TRANSITIONS=29} [2021-03-24 22:35:17,709 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 30 predicate places. [2021-03-24 22:35:17,709 INFO L480 AbstractCegarLoop]: Abstraction has has 56 places, 29 transitions, 325 flow [2021-03-24 22:35:17,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:17,709 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:35:17,709 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:35:17,709 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-24 22:35:17,710 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:35:17,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:35:17,710 INFO L82 PathProgramCache]: Analyzing trace with hash -452147191, now seen corresponding path program 7 times [2021-03-24 22:35:17,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:35:17,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010247267] [2021-03-24 22:35:17,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:35:17,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:35:17,747 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:17,747 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 22:35:17,749 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:17,750 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 22:35:17,757 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-03-24 22:35:17,758 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-03-24 22:35:17,770 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-03-24 22:35:17,770 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-03-24 22:35:17,786 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-24 22:35:17,787 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-24 22:35:17,800 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 22:35:17,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010247267] [2021-03-24 22:35:17,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:35:17,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 22:35:17,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564926102] [2021-03-24 22:35:17,802 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 22:35:17,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:35:17,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 22:35:17,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-24 22:35:17,805 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-03-24 22:35:17,805 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 29 transitions, 325 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:17,805 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:35:17,805 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-03-24 22:35:17,805 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:35:17,866 INFO L129 PetriNetUnfolder]: 6/87 cut-off events. [2021-03-24 22:35:17,867 INFO L130 PetriNetUnfolder]: For 536/565 co-relation queries the response was YES. [2021-03-24 22:35:17,867 INFO L84 FinitePrefix]: Finished finitePrefix Result has 378 conditions, 87 events. 6/87 cut-off events. For 536/565 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 456 event pairs, 6 based on Foata normal form. 8/93 useless extension candidates. Maximal degree in co-relation 355. Up to 23 conditions per place. [2021-03-24 22:35:17,869 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 8 selfloop transitions, 12 changer transitions 4/32 dead transitions. [2021-03-24 22:35:17,869 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 32 transitions, 403 flow [2021-03-24 22:35:17,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 22:35:17,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 22:35:17,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2021-03-24 22:35:17,871 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7991452991452992 [2021-03-24 22:35:17,871 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 187 transitions. [2021-03-24 22:35:17,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 187 transitions. [2021-03-24 22:35:17,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:35:17,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 187 transitions. [2021-03-24 22:35:17,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.166666666666668) internal successors, (187), 6 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:17,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:17,874 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:17,874 INFO L185 Difference]: Start difference. First operand has 56 places, 29 transitions, 325 flow. Second operand 6 states and 187 transitions. [2021-03-24 22:35:17,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 32 transitions, 403 flow [2021-03-24 22:35:17,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 32 transitions, 383 flow, removed 6 selfloop flow, removed 2 redundant places. [2021-03-24 22:35:17,878 INFO L241 Difference]: Finished difference. Result has 60 places, 27 transitions, 313 flow [2021-03-24 22:35:17,879 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=313, PETRI_PLACES=60, PETRI_TRANSITIONS=27} [2021-03-24 22:35:17,879 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 34 predicate places. [2021-03-24 22:35:17,879 INFO L480 AbstractCegarLoop]: Abstraction has has 60 places, 27 transitions, 313 flow [2021-03-24 22:35:17,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:17,879 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:35:17,879 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:35:17,879 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-03-24 22:35:17,880 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:35:17,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:35:17,880 INFO L82 PathProgramCache]: Analyzing trace with hash -455715067, now seen corresponding path program 8 times [2021-03-24 22:35:17,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:35:17,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093156267] [2021-03-24 22:35:17,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:35:17,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:35:17,906 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:17,907 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 22:35:17,908 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:17,908 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 22:35:17,913 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:17,914 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 22:35:17,923 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-03-24 22:35:17,924 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-03-24 22:35:17,943 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-24 22:35:17,943 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-24 22:35:17,960 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 22:35:17,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093156267] [2021-03-24 22:35:17,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:35:17,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 22:35:17,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727524662] [2021-03-24 22:35:17,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 22:35:17,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:35:17,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 22:35:17,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-24 22:35:17,962 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-03-24 22:35:17,963 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 27 transitions, 313 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:17,963 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:35:17,963 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-03-24 22:35:17,963 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:35:18,012 INFO L129 PetriNetUnfolder]: 5/83 cut-off events. [2021-03-24 22:35:18,013 INFO L130 PetriNetUnfolder]: For 489/509 co-relation queries the response was YES. [2021-03-24 22:35:18,013 INFO L84 FinitePrefix]: Finished finitePrefix Result has 363 conditions, 83 events. 5/83 cut-off events. For 489/509 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 425 event pairs, 5 based on Foata normal form. 6/87 useless extension candidates. Maximal degree in co-relation 339. Up to 18 conditions per place. [2021-03-24 22:35:18,014 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 10 selfloop transitions, 10 changer transitions 2/30 dead transitions. [2021-03-24 22:35:18,014 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 30 transitions, 390 flow [2021-03-24 22:35:18,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 22:35:18,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 22:35:18,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2021-03-24 22:35:18,015 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7991452991452992 [2021-03-24 22:35:18,015 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 187 transitions. [2021-03-24 22:35:18,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 187 transitions. [2021-03-24 22:35:18,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:35:18,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 187 transitions. [2021-03-24 22:35:18,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.166666666666668) internal successors, (187), 6 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:18,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:18,017 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:18,017 INFO L185 Difference]: Start difference. First operand has 60 places, 27 transitions, 313 flow. Second operand 6 states and 187 transitions. [2021-03-24 22:35:18,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 30 transitions, 390 flow [2021-03-24 22:35:18,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 30 transitions, 308 flow, removed 8 selfloop flow, removed 11 redundant places. [2021-03-24 22:35:18,020 INFO L241 Difference]: Finished difference. Result has 54 places, 27 transitions, 270 flow [2021-03-24 22:35:18,020 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=270, PETRI_PLACES=54, PETRI_TRANSITIONS=27} [2021-03-24 22:35:18,020 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 28 predicate places. [2021-03-24 22:35:18,020 INFO L480 AbstractCegarLoop]: Abstraction has has 54 places, 27 transitions, 270 flow [2021-03-24 22:35:18,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:18,021 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:35:18,021 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:35:18,021 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-03-24 22:35:18,021 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:35:18,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:35:18,021 INFO L82 PathProgramCache]: Analyzing trace with hash 2128638921, now seen corresponding path program 9 times [2021-03-24 22:35:18,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:35:18,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727591488] [2021-03-24 22:35:18,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:35:18,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:35:18,033 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:18,034 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 22:35:18,034 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:18,035 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 22:35:18,040 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:18,040 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 22:35:18,049 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-03-24 22:35:18,050 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-03-24 22:35:18,063 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-24 22:35:18,064 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-24 22:35:18,078 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 22:35:18,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727591488] [2021-03-24 22:35:18,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:35:18,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 22:35:18,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997050129] [2021-03-24 22:35:18,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 22:35:18,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:35:18,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 22:35:18,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-24 22:35:18,080 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-03-24 22:35:18,080 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 27 transitions, 270 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:18,080 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:35:18,080 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-03-24 22:35:18,080 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:35:18,136 INFO L129 PetriNetUnfolder]: 5/77 cut-off events. [2021-03-24 22:35:18,137 INFO L130 PetriNetUnfolder]: For 292/306 co-relation queries the response was YES. [2021-03-24 22:35:18,137 INFO L84 FinitePrefix]: Finished finitePrefix Result has 312 conditions, 77 events. 5/77 cut-off events. For 292/306 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 375 event pairs, 5 based on Foata normal form. 5/80 useless extension candidates. Maximal degree in co-relation 293. Up to 18 conditions per place. [2021-03-24 22:35:18,137 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 11 selfloop transitions, 9 changer transitions 3/31 dead transitions. [2021-03-24 22:35:18,137 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 31 transitions, 350 flow [2021-03-24 22:35:18,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 22:35:18,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 22:35:18,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-03-24 22:35:18,139 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8034188034188035 [2021-03-24 22:35:18,139 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-03-24 22:35:18,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-03-24 22:35:18,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:35:18,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-03-24 22:35:18,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 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 22:35:18,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:18,141 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:18,141 INFO L185 Difference]: Start difference. First operand has 54 places, 27 transitions, 270 flow. Second operand 6 states and 188 transitions. [2021-03-24 22:35:18,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 31 transitions, 350 flow [2021-03-24 22:35:18,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 31 transitions, 322 flow, removed 4 selfloop flow, removed 4 redundant places. [2021-03-24 22:35:18,146 INFO L241 Difference]: Finished difference. Result has 55 places, 26 transitions, 263 flow [2021-03-24 22:35:18,146 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=263, PETRI_PLACES=55, PETRI_TRANSITIONS=26} [2021-03-24 22:35:18,146 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 29 predicate places. [2021-03-24 22:35:18,147 INFO L480 AbstractCegarLoop]: Abstraction has has 55 places, 26 transitions, 263 flow [2021-03-24 22:35:18,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:18,147 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:35:18,147 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:35:18,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-03-24 22:35:18,147 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:35:18,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:35:18,147 INFO L82 PathProgramCache]: Analyzing trace with hash 2084936939, now seen corresponding path program 10 times [2021-03-24 22:35:18,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:35:18,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430279060] [2021-03-24 22:35:18,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:35:18,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:35:18,165 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:18,166 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 22:35:18,168 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:18,169 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 22:35:18,175 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-03-24 22:35:18,176 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-03-24 22:35:18,185 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-03-24 22:35:18,186 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-03-24 22:35:18,200 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-24 22:35:18,201 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-24 22:35:18,215 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 22:35:18,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430279060] [2021-03-24 22:35:18,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:35:18,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 22:35:18,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585698655] [2021-03-24 22:35:18,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 22:35:18,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:35:18,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 22:35:18,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-24 22:35:18,217 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-03-24 22:35:18,217 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 26 transitions, 263 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:18,217 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:35:18,217 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-03-24 22:35:18,217 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:35:18,253 INFO L129 PetriNetUnfolder]: 5/67 cut-off events. [2021-03-24 22:35:18,253 INFO L130 PetriNetUnfolder]: For 232/232 co-relation queries the response was YES. [2021-03-24 22:35:18,254 INFO L84 FinitePrefix]: Finished finitePrefix Result has 275 conditions, 67 events. 5/67 cut-off events. For 232/232 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 311 event pairs, 1 based on Foata normal form. 1/67 useless extension candidates. Maximal degree in co-relation 256. Up to 14 conditions per place. [2021-03-24 22:35:18,254 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 13 selfloop transitions, 8 changer transitions 2/31 dead transitions. [2021-03-24 22:35:18,254 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 31 transitions, 345 flow [2021-03-24 22:35:18,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 22:35:18,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 22:35:18,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-03-24 22:35:18,255 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8034188034188035 [2021-03-24 22:35:18,255 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-03-24 22:35:18,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-03-24 22:35:18,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:35:18,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-03-24 22:35:18,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 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 22:35:18,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:18,257 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:18,257 INFO L185 Difference]: Start difference. First operand has 55 places, 26 transitions, 263 flow. Second operand 6 states and 188 transitions. [2021-03-24 22:35:18,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 31 transitions, 345 flow [2021-03-24 22:35:18,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 31 transitions, 323 flow, removed 3 selfloop flow, removed 3 redundant places. [2021-03-24 22:35:18,259 INFO L241 Difference]: Finished difference. Result has 58 places, 25 transitions, 252 flow [2021-03-24 22:35:18,259 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=252, PETRI_PLACES=58, PETRI_TRANSITIONS=25} [2021-03-24 22:35:18,259 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 32 predicate places. [2021-03-24 22:35:18,260 INFO L480 AbstractCegarLoop]: Abstraction has has 58 places, 25 transitions, 252 flow [2021-03-24 22:35:18,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:18,260 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:35:18,260 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:35:18,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-03-24 22:35:18,260 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:35:18,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:35:18,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1473450575, now seen corresponding path program 11 times [2021-03-24 22:35:18,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:35:18,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002664880] [2021-03-24 22:35:18,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:35:18,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:35:18,271 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:18,272 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 22:35:18,272 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:18,273 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 22:35:18,278 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-03-24 22:35:18,279 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-03-24 22:35:18,289 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-03-24 22:35:18,289 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-03-24 22:35:18,309 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-24 22:35:18,313 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-24 22:35:18,330 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 22:35:18,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002664880] [2021-03-24 22:35:18,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:35:18,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 22:35:18,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927823998] [2021-03-24 22:35:18,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 22:35:18,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:35:18,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 22:35:18,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-24 22:35:18,332 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-03-24 22:35:18,332 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 25 transitions, 252 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:18,332 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:35:18,332 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-03-24 22:35:18,332 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:35:18,372 INFO L129 PetriNetUnfolder]: 3/78 cut-off events. [2021-03-24 22:35:18,373 INFO L130 PetriNetUnfolder]: For 283/283 co-relation queries the response was YES. [2021-03-24 22:35:18,373 INFO L84 FinitePrefix]: Finished finitePrefix Result has 306 conditions, 78 events. 3/78 cut-off events. For 283/283 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 385 event pairs, 1 based on Foata normal form. 1/77 useless extension candidates. Maximal degree in co-relation 286. Up to 18 conditions per place. [2021-03-24 22:35:18,374 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 16 selfloop transitions, 8 changer transitions 2/34 dead transitions. [2021-03-24 22:35:18,374 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 34 transitions, 404 flow [2021-03-24 22:35:18,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 22:35:18,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 22:35:18,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-03-24 22:35:18,376 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8034188034188035 [2021-03-24 22:35:18,376 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-03-24 22:35:18,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-03-24 22:35:18,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:35:18,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-03-24 22:35:18,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 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 22:35:18,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:18,378 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:18,378 INFO L185 Difference]: Start difference. First operand has 58 places, 25 transitions, 252 flow. Second operand 6 states and 188 transitions. [2021-03-24 22:35:18,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 34 transitions, 404 flow [2021-03-24 22:35:18,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 34 transitions, 359 flow, removed 11 selfloop flow, removed 5 redundant places. [2021-03-24 22:35:18,381 INFO L241 Difference]: Finished difference. Result has 60 places, 27 transitions, 277 flow [2021-03-24 22:35:18,382 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=277, PETRI_PLACES=60, PETRI_TRANSITIONS=27} [2021-03-24 22:35:18,382 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 34 predicate places. [2021-03-24 22:35:18,382 INFO L480 AbstractCegarLoop]: Abstraction has has 60 places, 27 transitions, 277 flow [2021-03-24 22:35:18,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:18,382 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:35:18,382 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:35:18,382 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-03-24 22:35:18,383 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:35:18,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:35:18,383 INFO L82 PathProgramCache]: Analyzing trace with hash 476805071, now seen corresponding path program 12 times [2021-03-24 22:35:18,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:35:18,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600845018] [2021-03-24 22:35:18,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:35:18,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:35:18,408 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:18,408 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 22:35:18,409 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:18,409 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 22:35:18,415 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-03-24 22:35:18,416 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-03-24 22:35:18,430 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-03-24 22:35:18,431 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-03-24 22:35:18,446 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-24 22:35:18,447 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-24 22:35:18,461 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 22:35:18,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600845018] [2021-03-24 22:35:18,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:35:18,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 22:35:18,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075382926] [2021-03-24 22:35:18,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 22:35:18,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:35:18,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 22:35:18,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-24 22:35:18,462 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-03-24 22:35:18,463 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 27 transitions, 277 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:18,463 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:35:18,463 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-03-24 22:35:18,463 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:35:18,511 INFO L129 PetriNetUnfolder]: 1/91 cut-off events. [2021-03-24 22:35:18,511 INFO L130 PetriNetUnfolder]: For 360/363 co-relation queries the response was YES. [2021-03-24 22:35:18,511 INFO L84 FinitePrefix]: Finished finitePrefix Result has 362 conditions, 91 events. 1/91 cut-off events. For 360/363 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 519 event pairs, 1 based on Foata normal form. 1/91 useless extension candidates. Maximal degree in co-relation 341. Up to 20 conditions per place. [2021-03-24 22:35:18,512 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 16 selfloop transitions, 10 changer transitions 2/36 dead transitions. [2021-03-24 22:35:18,512 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 36 transitions, 442 flow [2021-03-24 22:35:18,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 22:35:18,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 22:35:18,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-03-24 22:35:18,513 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8034188034188035 [2021-03-24 22:35:18,513 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-03-24 22:35:18,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-03-24 22:35:18,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:35:18,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-03-24 22:35:18,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 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 22:35:18,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:18,515 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:18,515 INFO L185 Difference]: Start difference. First operand has 60 places, 27 transitions, 277 flow. Second operand 6 states and 188 transitions. [2021-03-24 22:35:18,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 36 transitions, 442 flow [2021-03-24 22:35:18,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 36 transitions, 420 flow, removed 6 selfloop flow, removed 4 redundant places. [2021-03-24 22:35:18,518 INFO L241 Difference]: Finished difference. Result has 64 places, 29 transitions, 334 flow [2021-03-24 22:35:18,518 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=334, PETRI_PLACES=64, PETRI_TRANSITIONS=29} [2021-03-24 22:35:18,518 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 38 predicate places. [2021-03-24 22:35:18,518 INFO L480 AbstractCegarLoop]: Abstraction has has 64 places, 29 transitions, 334 flow [2021-03-24 22:35:18,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:18,518 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:35:18,518 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:35:18,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-03-24 22:35:18,518 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:35:18,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:35:18,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1221507569, now seen corresponding path program 13 times [2021-03-24 22:35:18,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:35:18,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253806227] [2021-03-24 22:35:18,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:35:18,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:35:18,552 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:18,552 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 22:35:18,553 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:18,553 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 22:35:18,560 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-03-24 22:35:18,560 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-03-24 22:35:18,580 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-03-24 22:35:18,580 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-03-24 22:35:18,595 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-24 22:35:18,595 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-24 22:35:18,608 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 22:35:18,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253806227] [2021-03-24 22:35:18,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:35:18,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 22:35:18,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394165374] [2021-03-24 22:35:18,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 22:35:18,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:35:18,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 22:35:18,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-24 22:35:18,614 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-03-24 22:35:18,614 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 29 transitions, 334 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:18,614 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:35:18,614 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-03-24 22:35:18,614 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:35:18,651 INFO L129 PetriNetUnfolder]: 1/84 cut-off events. [2021-03-24 22:35:18,651 INFO L130 PetriNetUnfolder]: For 384/384 co-relation queries the response was YES. [2021-03-24 22:35:18,651 INFO L84 FinitePrefix]: Finished finitePrefix Result has 366 conditions, 84 events. 1/84 cut-off events. For 384/384 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 458 event pairs, 0 based on Foata normal form. 1/85 useless extension candidates. Maximal degree in co-relation 344. Up to 19 conditions per place. [2021-03-24 22:35:18,652 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 18 selfloop transitions, 10 changer transitions 2/38 dead transitions. [2021-03-24 22:35:18,652 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 38 transitions, 506 flow [2021-03-24 22:35:18,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 22:35:18,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 22:35:18,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-03-24 22:35:18,653 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8034188034188035 [2021-03-24 22:35:18,653 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-03-24 22:35:18,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-03-24 22:35:18,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:35:18,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-03-24 22:35:18,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 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 22:35:18,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:18,654 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:18,654 INFO L185 Difference]: Start difference. First operand has 64 places, 29 transitions, 334 flow. Second operand 6 states and 188 transitions. [2021-03-24 22:35:18,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 38 transitions, 506 flow [2021-03-24 22:35:18,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 38 transitions, 485 flow, removed 7 selfloop flow, removed 3 redundant places. [2021-03-24 22:35:18,657 INFO L241 Difference]: Finished difference. Result has 69 places, 31 transitions, 389 flow [2021-03-24 22:35:18,658 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=389, PETRI_PLACES=69, PETRI_TRANSITIONS=31} [2021-03-24 22:35:18,658 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 43 predicate places. [2021-03-24 22:35:18,658 INFO L480 AbstractCegarLoop]: Abstraction has has 69 places, 31 transitions, 389 flow [2021-03-24 22:35:18,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:18,658 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:35:18,658 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:35:18,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-03-24 22:35:18,658 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:35:18,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:35:18,659 INFO L82 PathProgramCache]: Analyzing trace with hash 2080382099, now seen corresponding path program 14 times [2021-03-24 22:35:18,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:35:18,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829947456] [2021-03-24 22:35:18,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:35:18,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:35:18,669 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:18,670 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 22:35:18,670 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:18,671 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 22:35:18,676 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-03-24 22:35:18,677 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-03-24 22:35:18,693 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-03-24 22:35:18,694 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-03-24 22:35:18,718 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-24 22:35:18,718 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-24 22:35:18,733 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 22:35:18,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829947456] [2021-03-24 22:35:18,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:35:18,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 22:35:18,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535183921] [2021-03-24 22:35:18,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 22:35:18,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:35:18,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 22:35:18,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-24 22:35:18,736 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-03-24 22:35:18,736 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 31 transitions, 389 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:18,736 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:35:18,736 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-03-24 22:35:18,736 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:35:18,786 INFO L129 PetriNetUnfolder]: 1/77 cut-off events. [2021-03-24 22:35:18,786 INFO L130 PetriNetUnfolder]: For 436/436 co-relation queries the response was YES. [2021-03-24 22:35:18,786 INFO L84 FinitePrefix]: Finished finitePrefix Result has 362 conditions, 77 events. 1/77 cut-off events. For 436/436 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 396 event pairs, 0 based on Foata normal form. 1/78 useless extension candidates. Maximal degree in co-relation 338. Up to 19 conditions per place. [2021-03-24 22:35:18,787 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 16 selfloop transitions, 9 changer transitions 3/36 dead transitions. [2021-03-24 22:35:18,787 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 36 transitions, 504 flow [2021-03-24 22:35:18,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 22:35:18,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 22:35:18,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2021-03-24 22:35:18,788 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7991452991452992 [2021-03-24 22:35:18,788 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 187 transitions. [2021-03-24 22:35:18,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 187 transitions. [2021-03-24 22:35:18,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:35:18,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 187 transitions. [2021-03-24 22:35:18,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.166666666666668) internal successors, (187), 6 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:18,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:18,789 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:18,789 INFO L185 Difference]: Start difference. First operand has 69 places, 31 transitions, 389 flow. Second operand 6 states and 187 transitions. [2021-03-24 22:35:18,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 36 transitions, 504 flow [2021-03-24 22:35:18,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 36 transitions, 485 flow, removed 6 selfloop flow, removed 3 redundant places. [2021-03-24 22:35:18,792 INFO L241 Difference]: Finished difference. Result has 72 places, 30 transitions, 392 flow [2021-03-24 22:35:18,792 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=392, PETRI_PLACES=72, PETRI_TRANSITIONS=30} [2021-03-24 22:35:18,793 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 46 predicate places. [2021-03-24 22:35:18,793 INFO L480 AbstractCegarLoop]: Abstraction has has 72 places, 30 transitions, 392 flow [2021-03-24 22:35:18,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:18,793 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:35:18,793 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:35:18,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-03-24 22:35:18,793 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:35:18,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:35:18,793 INFO L82 PathProgramCache]: Analyzing trace with hash -618143921, now seen corresponding path program 15 times [2021-03-24 22:35:18,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:35:18,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945081680] [2021-03-24 22:35:18,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:35:18,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:35:18,828 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:18,828 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 22:35:18,829 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:18,829 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 22:35:18,833 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:18,834 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 22:35:18,842 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-03-24 22:35:18,842 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-03-24 22:35:18,855 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-24 22:35:18,855 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-24 22:35:18,881 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 22:35:18,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945081680] [2021-03-24 22:35:18,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:35:18,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 22:35:18,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682006273] [2021-03-24 22:35:18,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 22:35:18,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:35:18,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 22:35:18,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-24 22:35:18,883 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-03-24 22:35:18,883 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 30 transitions, 392 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:18,883 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:35:18,883 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-03-24 22:35:18,883 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:35:18,922 INFO L129 PetriNetUnfolder]: 0/83 cut-off events. [2021-03-24 22:35:18,922 INFO L130 PetriNetUnfolder]: For 513/513 co-relation queries the response was YES. [2021-03-24 22:35:18,922 INFO L84 FinitePrefix]: Finished finitePrefix Result has 398 conditions, 83 events. 0/83 cut-off events. For 513/513 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 447 event pairs, 0 based on Foata normal form. 1/83 useless extension candidates. Maximal degree in co-relation 0. Up to 17 conditions per place. [2021-03-24 22:35:18,923 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 18 selfloop transitions, 10 changer transitions 2/38 dead transitions. [2021-03-24 22:35:18,923 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 38 transitions, 571 flow [2021-03-24 22:35:18,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 22:35:18,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 22:35:18,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-03-24 22:35:18,924 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8034188034188035 [2021-03-24 22:35:18,924 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-03-24 22:35:18,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-03-24 22:35:18,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:35:18,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-03-24 22:35:18,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 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 22:35:18,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:18,926 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:18,926 INFO L185 Difference]: Start difference. First operand has 72 places, 30 transitions, 392 flow. Second operand 6 states and 188 transitions. [2021-03-24 22:35:18,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 38 transitions, 571 flow [2021-03-24 22:35:18,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 38 transitions, 539 flow, removed 4 selfloop flow, removed 4 redundant places. [2021-03-24 22:35:18,929 INFO L241 Difference]: Finished difference. Result has 75 places, 33 transitions, 467 flow [2021-03-24 22:35:18,930 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=467, PETRI_PLACES=75, PETRI_TRANSITIONS=33} [2021-03-24 22:35:18,930 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 49 predicate places. [2021-03-24 22:35:18,930 INFO L480 AbstractCegarLoop]: Abstraction has has 75 places, 33 transitions, 467 flow [2021-03-24 22:35:18,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:18,930 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:35:18,930 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:35:18,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-03-24 22:35:18,930 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:35:18,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:35:18,931 INFO L82 PathProgramCache]: Analyzing trace with hash -79698959, now seen corresponding path program 16 times [2021-03-24 22:35:18,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:35:18,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376247594] [2021-03-24 22:35:18,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:35:18,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:35:18,940 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:18,940 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 22:35:18,941 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:18,941 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 22:35:18,946 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:18,946 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 22:35:18,955 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-03-24 22:35:18,955 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-03-24 22:35:18,969 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-24 22:35:18,969 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-24 22:35:18,982 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 22:35:18,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376247594] [2021-03-24 22:35:18,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:35:18,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 22:35:18,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511707065] [2021-03-24 22:35:18,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 22:35:18,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:35:18,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 22:35:18,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-24 22:35:18,983 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-03-24 22:35:18,984 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 33 transitions, 467 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:18,984 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:35:18,984 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-03-24 22:35:18,984 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:35:19,018 INFO L129 PetriNetUnfolder]: 0/76 cut-off events. [2021-03-24 22:35:19,018 INFO L130 PetriNetUnfolder]: For 519/521 co-relation queries the response was YES. [2021-03-24 22:35:19,018 INFO L84 FinitePrefix]: Finished finitePrefix Result has 383 conditions, 76 events. 0/76 cut-off events. For 519/521 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 390 event pairs, 0 based on Foata normal form. 1/77 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2021-03-24 22:35:19,019 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 16 selfloop transitions, 11 changer transitions 2/37 dead transitions. [2021-03-24 22:35:19,019 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 37 transitions, 564 flow [2021-03-24 22:35:19,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 22:35:19,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 22:35:19,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-03-24 22:35:19,020 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8034188034188035 [2021-03-24 22:35:19,020 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-03-24 22:35:19,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-03-24 22:35:19,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:35:19,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-03-24 22:35:19,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 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 22:35:19,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:19,021 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:19,021 INFO L185 Difference]: Start difference. First operand has 75 places, 33 transitions, 467 flow. Second operand 6 states and 188 transitions. [2021-03-24 22:35:19,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 37 transitions, 564 flow [2021-03-24 22:35:19,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 37 transitions, 551 flow, removed 4 selfloop flow, removed 3 redundant places. [2021-03-24 22:35:19,025 INFO L241 Difference]: Finished difference. Result has 78 places, 32 transitions, 466 flow [2021-03-24 22:35:19,025 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=459, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=466, PETRI_PLACES=78, PETRI_TRANSITIONS=32} [2021-03-24 22:35:19,026 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 52 predicate places. [2021-03-24 22:35:19,026 INFO L480 AbstractCegarLoop]: Abstraction has has 78 places, 32 transitions, 466 flow [2021-03-24 22:35:19,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:19,026 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:35:19,026 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:35:19,026 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-03-24 22:35:19,026 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:35:19,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:35:19,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1798042665, now seen corresponding path program 17 times [2021-03-24 22:35:19,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:35:19,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535308440] [2021-03-24 22:35:19,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:35:19,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:35:19,036 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:19,036 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 22:35:19,036 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:19,037 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 22:35:19,041 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:19,042 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 22:35:19,050 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-03-24 22:35:19,051 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-03-24 22:35:19,063 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-24 22:35:19,064 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-24 22:35:19,077 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 22:35:19,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535308440] [2021-03-24 22:35:19,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:35:19,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 22:35:19,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365864972] [2021-03-24 22:35:19,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 22:35:19,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:35:19,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 22:35:19,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-24 22:35:19,087 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-03-24 22:35:19,087 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 32 transitions, 466 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:19,087 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:35:19,087 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-03-24 22:35:19,087 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:35:19,153 INFO L129 PetriNetUnfolder]: 0/69 cut-off events. [2021-03-24 22:35:19,153 INFO L130 PetriNetUnfolder]: For 582/588 co-relation queries the response was YES. [2021-03-24 22:35:19,153 INFO L84 FinitePrefix]: Finished finitePrefix Result has 366 conditions, 69 events. 0/69 cut-off events. For 582/588 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 332 event pairs, 0 based on Foata normal form. 3/72 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2021-03-24 22:35:19,154 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 14 selfloop transitions, 8 changer transitions 4/34 dead transitions. [2021-03-24 22:35:19,154 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 34 transitions, 540 flow [2021-03-24 22:35:19,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 22:35:19,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 22:35:19,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2021-03-24 22:35:19,155 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7948717948717948 [2021-03-24 22:35:19,155 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 186 transitions. [2021-03-24 22:35:19,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 186 transitions. [2021-03-24 22:35:19,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:35:19,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 186 transitions. [2021-03-24 22:35:19,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.0) internal successors, (186), 6 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:19,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:19,156 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:19,156 INFO L185 Difference]: Start difference. First operand has 78 places, 32 transitions, 466 flow. Second operand 6 states and 186 transitions. [2021-03-24 22:35:19,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 34 transitions, 540 flow [2021-03-24 22:35:19,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 34 transitions, 501 flow, removed 6 selfloop flow, removed 5 redundant places. [2021-03-24 22:35:19,160 INFO L241 Difference]: Finished difference. Result has 78 places, 29 transitions, 400 flow [2021-03-24 22:35:19,160 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=400, PETRI_PLACES=78, PETRI_TRANSITIONS=29} [2021-03-24 22:35:19,161 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 52 predicate places. [2021-03-24 22:35:19,161 INFO L480 AbstractCegarLoop]: Abstraction has has 78 places, 29 transitions, 400 flow [2021-03-24 22:35:19,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:19,161 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:35:19,161 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:35:19,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-03-24 22:35:19,161 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:35:19,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:35:19,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1632985331, now seen corresponding path program 18 times [2021-03-24 22:35:19,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:35:19,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754502266] [2021-03-24 22:35:19,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:35:19,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:35:19,171 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:19,171 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 22:35:19,172 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:19,172 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 22:35:19,177 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-03-24 22:35:19,177 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-03-24 22:35:19,186 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-03-24 22:35:19,186 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-03-24 22:35:19,199 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-24 22:35:19,200 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-24 22:35:19,213 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 22:35:19,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754502266] [2021-03-24 22:35:19,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:35:19,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 22:35:19,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202221562] [2021-03-24 22:35:19,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 22:35:19,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:35:19,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 22:35:19,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-24 22:35:19,214 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-03-24 22:35:19,215 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 29 transitions, 400 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:19,215 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:35:19,215 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-03-24 22:35:19,215 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:35:19,256 INFO L129 PetriNetUnfolder]: 0/60 cut-off events. [2021-03-24 22:35:19,256 INFO L130 PetriNetUnfolder]: For 402/402 co-relation queries the response was YES. [2021-03-24 22:35:19,256 INFO L84 FinitePrefix]: Finished finitePrefix Result has 312 conditions, 60 events. 0/60 cut-off events. For 402/402 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 264 event pairs, 0 based on Foata normal form. 1/61 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2021-03-24 22:35:19,257 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 15 selfloop transitions, 8 changer transitions 2/33 dead transitions. [2021-03-24 22:35:19,257 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 33 transitions, 485 flow [2021-03-24 22:35:19,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 22:35:19,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 22:35:19,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-03-24 22:35:19,258 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8034188034188035 [2021-03-24 22:35:19,258 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-03-24 22:35:19,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-03-24 22:35:19,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:35:19,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-03-24 22:35:19,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 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 22:35:19,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:19,260 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:19,260 INFO L185 Difference]: Start difference. First operand has 78 places, 29 transitions, 400 flow. Second operand 6 states and 188 transitions. [2021-03-24 22:35:19,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 33 transitions, 485 flow [2021-03-24 22:35:19,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 33 transitions, 446 flow, removed 4 selfloop flow, removed 6 redundant places. [2021-03-24 22:35:19,263 INFO L241 Difference]: Finished difference. Result has 77 places, 29 transitions, 389 flow [2021-03-24 22:35:19,263 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=389, PETRI_PLACES=77, PETRI_TRANSITIONS=29} [2021-03-24 22:35:19,263 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 51 predicate places. [2021-03-24 22:35:19,263 INFO L480 AbstractCegarLoop]: Abstraction has has 77 places, 29 transitions, 389 flow [2021-03-24 22:35:19,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:19,264 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:35:19,264 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:35:19,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-03-24 22:35:19,264 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:35:19,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:35:19,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1346663061, now seen corresponding path program 19 times [2021-03-24 22:35:19,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:35:19,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791469766] [2021-03-24 22:35:19,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:35:19,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:35:19,275 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:19,279 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 22:35:19,281 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:19,281 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 22:35:19,286 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-03-24 22:35:19,287 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-03-24 22:35:19,296 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-03-24 22:35:19,296 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-03-24 22:35:19,310 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-24 22:35:19,310 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-24 22:35:19,325 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 22:35:19,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791469766] [2021-03-24 22:35:19,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:35:19,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 22:35:19,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20645936] [2021-03-24 22:35:19,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 22:35:19,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:35:19,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 22:35:19,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-24 22:35:19,326 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-03-24 22:35:19,327 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 29 transitions, 389 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:19,327 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:35:19,327 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-03-24 22:35:19,327 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:35:19,362 INFO L129 PetriNetUnfolder]: 0/53 cut-off events. [2021-03-24 22:35:19,362 INFO L130 PetriNetUnfolder]: For 353/353 co-relation queries the response was YES. [2021-03-24 22:35:19,362 INFO L84 FinitePrefix]: Finished finitePrefix Result has 281 conditions, 53 events. 0/53 cut-off events. For 353/353 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 208 event pairs, 0 based on Foata normal form. 1/54 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2021-03-24 22:35:19,362 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 13 selfloop transitions, 7 changer transitions 3/31 dead transitions. [2021-03-24 22:35:19,362 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 31 transitions, 443 flow [2021-03-24 22:35:19,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 22:35:19,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 22:35:19,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2021-03-24 22:35:19,364 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7991452991452992 [2021-03-24 22:35:19,364 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 187 transitions. [2021-03-24 22:35:19,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 187 transitions. [2021-03-24 22:35:19,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:35:19,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 187 transitions. [2021-03-24 22:35:19,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.166666666666668) internal successors, (187), 6 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:19,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:19,365 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:19,365 INFO L185 Difference]: Start difference. First operand has 77 places, 29 transitions, 389 flow. Second operand 6 states and 187 transitions. [2021-03-24 22:35:19,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 31 transitions, 443 flow [2021-03-24 22:35:19,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 31 transitions, 433 flow, removed 3 selfloop flow, removed 2 redundant places. [2021-03-24 22:35:19,369 INFO L241 Difference]: Finished difference. Result has 80 places, 26 transitions, 345 flow [2021-03-24 22:35:19,369 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=345, PETRI_PLACES=80, PETRI_TRANSITIONS=26} [2021-03-24 22:35:19,369 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 54 predicate places. [2021-03-24 22:35:19,369 INFO L480 AbstractCegarLoop]: Abstraction has has 80 places, 26 transitions, 345 flow [2021-03-24 22:35:19,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:19,370 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:35:19,370 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:35:19,370 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-03-24 22:35:19,370 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:35:19,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:35:19,370 INFO L82 PathProgramCache]: Analyzing trace with hash -897088213, now seen corresponding path program 20 times [2021-03-24 22:35:19,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:35:19,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2520211] [2021-03-24 22:35:19,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:35:19,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:35:19,391 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:19,391 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 22:35:19,392 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:19,393 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 22:35:19,401 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-03-24 22:35:19,402 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-03-24 22:35:19,418 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-03-24 22:35:19,418 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-03-24 22:35:19,434 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-24 22:35:19,434 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-24 22:35:19,447 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 22:35:19,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2520211] [2021-03-24 22:35:19,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:35:19,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 22:35:19,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366463873] [2021-03-24 22:35:19,448 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 22:35:19,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:35:19,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 22:35:19,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-24 22:35:19,451 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-03-24 22:35:19,451 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 26 transitions, 345 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:19,451 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:35:19,452 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-03-24 22:35:19,452 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:35:19,481 INFO L129 PetriNetUnfolder]: 0/45 cut-off events. [2021-03-24 22:35:19,482 INFO L130 PetriNetUnfolder]: For 306/306 co-relation queries the response was YES. [2021-03-24 22:35:19,482 INFO L84 FinitePrefix]: Finished finitePrefix Result has 250 conditions, 45 events. 0/45 cut-off events. For 306/306 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 156 event pairs, 0 based on Foata normal form. 1/46 useless extension candidates. Maximal degree in co-relation 0. Up to 8 conditions per place. [2021-03-24 22:35:19,482 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 9 selfloop transitions, 7 changer transitions 3/27 dead transitions. [2021-03-24 22:35:19,482 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 27 transitions, 387 flow [2021-03-24 22:35:19,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 22:35:19,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 22:35:19,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2021-03-24 22:35:19,484 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7948717948717948 [2021-03-24 22:35:19,484 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 186 transitions. [2021-03-24 22:35:19,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 186 transitions. [2021-03-24 22:35:19,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:35:19,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 186 transitions. [2021-03-24 22:35:19,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.0) internal successors, (186), 6 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:19,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:19,487 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:19,487 INFO L185 Difference]: Start difference. First operand has 80 places, 26 transitions, 345 flow. Second operand 6 states and 186 transitions. [2021-03-24 22:35:19,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 27 transitions, 387 flow [2021-03-24 22:35:19,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 27 transitions, 366 flow, removed 3 selfloop flow, removed 5 redundant places. [2021-03-24 22:35:19,490 INFO L241 Difference]: Finished difference. Result has 79 places, 23 transitions, 286 flow [2021-03-24 22:35:19,490 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=286, PETRI_PLACES=79, PETRI_TRANSITIONS=23} [2021-03-24 22:35:19,491 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 53 predicate places. [2021-03-24 22:35:19,491 INFO L480 AbstractCegarLoop]: Abstraction has has 79 places, 23 transitions, 286 flow [2021-03-24 22:35:19,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:19,491 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:35:19,491 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:35:19,491 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-03-24 22:35:19,491 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:35:19,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:35:19,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1445521453, now seen corresponding path program 21 times [2021-03-24 22:35:19,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:35:19,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381817830] [2021-03-24 22:35:19,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:35:19,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:35:19,506 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:19,506 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 22:35:19,506 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:19,507 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 22:35:19,511 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:19,512 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 22:35:19,520 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-03-24 22:35:19,523 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-03-24 22:35:19,539 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-24 22:35:19,539 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-24 22:35:19,553 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 22:35:19,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381817830] [2021-03-24 22:35:19,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:35:19,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 22:35:19,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765277778] [2021-03-24 22:35:19,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 22:35:19,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:35:19,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 22:35:19,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-24 22:35:19,554 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-03-24 22:35:19,554 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 23 transitions, 286 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:19,555 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:35:19,555 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-03-24 22:35:19,555 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:35:19,605 INFO L129 PetriNetUnfolder]: 0/37 cut-off events. [2021-03-24 22:35:19,606 INFO L130 PetriNetUnfolder]: For 244/246 co-relation queries the response was YES. [2021-03-24 22:35:19,606 INFO L84 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 37 events. 0/37 cut-off events. For 244/246 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 101 event pairs, 0 based on Foata normal form. 2/39 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2021-03-24 22:35:19,606 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 8 selfloop transitions, 4 changer transitions 4/24 dead transitions. [2021-03-24 22:35:19,606 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 24 transitions, 322 flow [2021-03-24 22:35:19,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 22:35:19,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 22:35:19,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2021-03-24 22:35:19,607 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7948717948717948 [2021-03-24 22:35:19,607 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 186 transitions. [2021-03-24 22:35:19,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 186 transitions. [2021-03-24 22:35:19,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:35:19,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 186 transitions. [2021-03-24 22:35:19,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.0) internal successors, (186), 6 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:19,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:19,608 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:19,608 INFO L185 Difference]: Start difference. First operand has 79 places, 23 transitions, 286 flow. Second operand 6 states and 186 transitions. [2021-03-24 22:35:19,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 24 transitions, 322 flow [2021-03-24 22:35:19,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 24 transitions, 267 flow, removed 4 selfloop flow, removed 11 redundant places. [2021-03-24 22:35:19,610 INFO L241 Difference]: Finished difference. Result has 68 places, 19 transitions, 187 flow [2021-03-24 22:35:19,611 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=187, PETRI_PLACES=68, PETRI_TRANSITIONS=19} [2021-03-24 22:35:19,611 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 42 predicate places. [2021-03-24 22:35:19,611 INFO L480 AbstractCegarLoop]: Abstraction has has 68 places, 19 transitions, 187 flow [2021-03-24 22:35:19,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:19,611 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:35:19,611 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:35:19,611 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-03-24 22:35:19,611 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:35:19,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:35:19,612 INFO L82 PathProgramCache]: Analyzing trace with hash 244298485, now seen corresponding path program 22 times [2021-03-24 22:35:19,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:35:19,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774110698] [2021-03-24 22:35:19,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:35:19,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:35:19,625 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:19,625 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 22:35:19,626 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:19,626 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 22:35:19,631 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-03-24 22:35:19,634 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-03-24 22:35:19,643 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-03-24 22:35:19,644 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-03-24 22:35:19,657 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-24 22:35:19,658 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-24 22:35:19,670 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 22:35:19,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774110698] [2021-03-24 22:35:19,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:35:19,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 22:35:19,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414256777] [2021-03-24 22:35:19,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 22:35:19,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:35:19,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 22:35:19,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-24 22:35:19,673 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-03-24 22:35:19,673 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 19 transitions, 187 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:19,673 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:35:19,673 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-03-24 22:35:19,673 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:35:19,711 INFO L129 PetriNetUnfolder]: 0/28 cut-off events. [2021-03-24 22:35:19,711 INFO L130 PetriNetUnfolder]: For 103/103 co-relation queries the response was YES. [2021-03-24 22:35:19,711 INFO L84 FinitePrefix]: Finished finitePrefix Result has 142 conditions, 28 events. 0/28 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 52 event pairs, 0 based on Foata normal form. 1/29 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2021-03-24 22:35:19,711 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 5 selfloop transitions, 3 changer transitions 3/19 dead transitions. [2021-03-24 22:35:19,711 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 19 transitions, 209 flow [2021-03-24 22:35:19,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 22:35:19,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 22:35:19,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2021-03-24 22:35:19,712 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.782051282051282 [2021-03-24 22:35:19,712 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 183 transitions. [2021-03-24 22:35:19,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 183 transitions. [2021-03-24 22:35:19,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:35:19,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 183 transitions. [2021-03-24 22:35:19,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 30.5) internal successors, (183), 6 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:19,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:19,714 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:19,714 INFO L185 Difference]: Start difference. First operand has 68 places, 19 transitions, 187 flow. Second operand 6 states and 183 transitions. [2021-03-24 22:35:19,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 19 transitions, 209 flow [2021-03-24 22:35:19,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 19 transitions, 162 flow, removed 3 selfloop flow, removed 12 redundant places. [2021-03-24 22:35:19,715 INFO L241 Difference]: Finished difference. Result has 55 places, 16 transitions, 111 flow [2021-03-24 22:35:19,716 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=111, PETRI_PLACES=55, PETRI_TRANSITIONS=16} [2021-03-24 22:35:19,716 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 29 predicate places. [2021-03-24 22:35:19,716 INFO L480 AbstractCegarLoop]: Abstraction has has 55 places, 16 transitions, 111 flow [2021-03-24 22:35:19,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:19,716 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:35:19,716 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:35:19,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-03-24 22:35:19,716 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:35:19,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:35:19,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1958479669, now seen corresponding path program 23 times [2021-03-24 22:35:19,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:35:19,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447611807] [2021-03-24 22:35:19,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:35:19,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:35:19,728 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:19,729 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 22:35:19,729 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:19,730 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 22:35:19,736 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:19,736 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 22:35:19,744 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-03-24 22:35:19,745 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-03-24 22:35:19,757 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-24 22:35:19,758 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-24 22:35:19,771 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 22:35:19,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447611807] [2021-03-24 22:35:19,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:35:19,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 22:35:19,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908926284] [2021-03-24 22:35:19,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 22:35:19,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:35:19,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 22:35:19,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-24 22:35:19,773 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-03-24 22:35:19,773 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 16 transitions, 111 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:19,773 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:35:19,773 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-03-24 22:35:19,773 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:35:19,807 INFO L129 PetriNetUnfolder]: 0/20 cut-off events. [2021-03-24 22:35:19,807 INFO L130 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2021-03-24 22:35:19,807 INFO L84 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 20 events. 0/20 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 19 event pairs, 0 based on Foata normal form. 1/21 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-03-24 22:35:19,808 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 3 selfloop transitions, 2 changer transitions 3/16 dead transitions. [2021-03-24 22:35:19,808 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 16 transitions, 127 flow [2021-03-24 22:35:19,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 22:35:19,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 22:35:19,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2021-03-24 22:35:19,809 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7777777777777778 [2021-03-24 22:35:19,809 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 182 transitions. [2021-03-24 22:35:19,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 182 transitions. [2021-03-24 22:35:19,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:35:19,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 182 transitions. [2021-03-24 22:35:19,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:19,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:19,810 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:19,810 INFO L185 Difference]: Start difference. First operand has 55 places, 16 transitions, 111 flow. Second operand 6 states and 182 transitions. [2021-03-24 22:35:19,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 16 transitions, 127 flow [2021-03-24 22:35:19,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 16 transitions, 100 flow, removed 4 selfloop flow, removed 8 redundant places. [2021-03-24 22:35:19,810 INFO L241 Difference]: Finished difference. Result has 48 places, 13 transitions, 61 flow [2021-03-24 22:35:19,811 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=61, PETRI_PLACES=48, PETRI_TRANSITIONS=13} [2021-03-24 22:35:19,811 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 22 predicate places. [2021-03-24 22:35:19,811 INFO L480 AbstractCegarLoop]: Abstraction has has 48 places, 13 transitions, 61 flow [2021-03-24 22:35:19,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:19,811 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:35:19,811 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:35:19,811 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-03-24 22:35:19,812 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:35:19,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:35:19,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1484748849, now seen corresponding path program 24 times [2021-03-24 22:35:19,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:35:19,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589049494] [2021-03-24 22:35:19,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:35:19,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:35:19,823 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:19,828 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 22:35:19,829 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:19,829 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 22:35:19,834 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:35:19,834 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 22:35:19,842 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-03-24 22:35:19,850 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-03-24 22:35:19,864 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-24 22:35:19,865 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-24 22:35:19,877 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 22:35:19,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589049494] [2021-03-24 22:35:19,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:35:19,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 22:35:19,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716966289] [2021-03-24 22:35:19,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 22:35:19,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:35:19,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 22:35:19,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-24 22:35:19,879 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 39 [2021-03-24 22:35:19,879 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 13 transitions, 61 flow. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:19,879 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:35:19,879 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 39 [2021-03-24 22:35:19,879 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:35:19,909 INFO L129 PetriNetUnfolder]: 0/12 cut-off events. [2021-03-24 22:35:19,909 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-03-24 22:35:19,909 INFO L84 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 12 events. 0/12 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 2 event pairs, 0 based on Foata normal form. 1/13 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-24 22:35:19,909 INFO L132 encePairwiseOnDemand]: 34/39 looper letters, 0 selfloop transitions, 0 changer transitions 12/12 dead transitions. [2021-03-24 22:35:19,909 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 12 transitions, 65 flow [2021-03-24 22:35:19,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-24 22:35:19,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-24 22:35:19,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2021-03-24 22:35:19,910 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7649572649572649 [2021-03-24 22:35:19,910 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 179 transitions. [2021-03-24 22:35:19,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 179 transitions. [2021-03-24 22:35:19,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:35:19,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 179 transitions. [2021-03-24 22:35:19,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:19,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:19,912 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:19,912 INFO L185 Difference]: Start difference. First operand has 48 places, 13 transitions, 61 flow. Second operand 6 states and 179 transitions. [2021-03-24 22:35:19,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 12 transitions, 65 flow [2021-03-24 22:35:19,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 12 transitions, 51 flow, removed 2 selfloop flow, removed 7 redundant places. [2021-03-24 22:35:19,912 INFO L241 Difference]: Finished difference. Result has 37 places, 0 transitions, 0 flow [2021-03-24 22:35:19,913 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=43, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=37, PETRI_TRANSITIONS=0} [2021-03-24 22:35:19,913 INFO L343 CegarLoopForPetriNet]: 26 programPoint places, 11 predicate places. [2021-03-24 22:35:19,913 INFO L480 AbstractCegarLoop]: Abstraction has has 37 places, 0 transitions, 0 flow [2021-03-24 22:35:19,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 22:35:19,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-03-24 22:35:19,916 INFO L202 PluginConnector]: Adding new model example_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.03 10:35:19 BasicIcfg [2021-03-24 22:35:19,916 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-24 22:35:19,917 INFO L168 Benchmark]: Toolchain (without parser) took 4197.11 ms. Allocated memory was 255.9 MB in the beginning and 354.4 MB in the end (delta: 98.6 MB). Free memory was 236.9 MB in the beginning and 169.8 MB in the end (delta: 67.2 MB). Peak memory consumption was 163.7 MB. Max. memory is 16.0 GB. [2021-03-24 22:35:19,917 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 238.0 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 22:35:19,917 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.84 ms. Allocated memory is still 255.9 MB. Free memory was 236.9 MB in the beginning and 235.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-24 22:35:19,917 INFO L168 Benchmark]: Boogie Preprocessor took 11.18 ms. Allocated memory is still 255.9 MB. Free memory was 235.3 MB in the beginning and 234.5 MB in the end (delta: 850.9 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 22:35:19,917 INFO L168 Benchmark]: RCFGBuilder took 217.48 ms. Allocated memory is still 255.9 MB. Free memory was 234.5 MB in the beginning and 239.4 MB in the end (delta: -4.9 MB). Peak memory consumption was 18.6 MB. Max. memory is 16.0 GB. [2021-03-24 22:35:19,917 INFO L168 Benchmark]: TraceAbstraction took 3941.18 ms. Allocated memory was 255.9 MB in the beginning and 354.4 MB in the end (delta: 98.6 MB). Free memory was 238.7 MB in the beginning and 169.8 MB in the end (delta: 68.9 MB). Peak memory consumption was 164.0 MB. Max. memory is 16.0 GB. [2021-03-24 22:35:19,918 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 238.0 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 22.84 ms. Allocated memory is still 255.9 MB. Free memory was 236.9 MB in the beginning and 235.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.18 ms. Allocated memory is still 255.9 MB. Free memory was 235.3 MB in the beginning and 234.5 MB in the end (delta: 850.9 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 217.48 ms. Allocated memory is still 255.9 MB. Free memory was 234.5 MB in the beginning and 239.4 MB in the end (delta: -4.9 MB). Peak memory consumption was 18.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 3941.18 ms. Allocated memory was 255.9 MB in the beginning and 354.4 MB in the end (delta: 98.6 MB). Free memory was 238.7 MB in the beginning and 169.8 MB in the end (delta: 68.9 MB). Peak memory consumption was 164.0 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 98.1ms, 30 PlacesBefore, 26 PlacesAfterwards, 29 TransitionsBefore, 25 TransitionsAfterwards, 216 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 4 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 4 TotalNumberOfCompositions, 66 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 66, positive: 66, positive conditional: 0, positive unconditional: 66, 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: 66, positive: 66, positive conditional: 0, positive unconditional: 66, 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: 66, positive: 66, positive conditional: 0, positive unconditional: 66, 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: 66, positive: 66, positive conditional: 0, positive unconditional: 66, 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: 66, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 66, unknown conditional: 0, unknown unconditional: 66] , 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 - PositiveResult [Line: 21]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 15.6ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 3786.4ms, OverallIterations: 27, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 1449.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 197.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 197 SDtfs, 247 SDslu, 128 SDs, 0 SdLazy, 358 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 294.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 153 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1455.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=467occurred in iteration=18, InterpolantAutomatonStates: 153, 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: 23.5ms SsaConstructionTime, 87.4ms SatisfiabilityAnalysisTime, 1760.6ms InterpolantComputationTime, 351 NumberOfCodeBlocks, 351 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 324 ConstructedInterpolants, 0 QuantifiedInterpolants, 4346 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 27 InterpolantComputations, 27 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...