/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-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/mcr/example_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-0e22065b97d0a1f8b3904e080cebe0f05e88d2b7-0e22065 [2021-06-10 14:50:49,056 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-10 14:50:49,058 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-10 14:50:49,091 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-10 14:50:49,091 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-10 14:50:49,094 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-10 14:50:49,096 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-10 14:50:49,100 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-10 14:50:49,101 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-10 14:50:49,104 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-10 14:50:49,105 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-10 14:50:49,106 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-10 14:50:49,106 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-10 14:50:49,108 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-10 14:50:49,109 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-10 14:50:49,109 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-10 14:50:49,111 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-10 14:50:49,112 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-10 14:50:49,114 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-10 14:50:49,118 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-10 14:50:49,119 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-10 14:50:49,119 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-10 14:50:49,120 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-10 14:50:49,121 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-10 14:50:49,126 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-10 14:50:49,131 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-10 14:50:49,132 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-10 14:50:49,132 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-10 14:50:49,133 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2021-06-10 14:50:49,159 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-10 14:50:49,160 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-10 14:50:49,162 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-10 14:50:49,162 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-10 14:50:49,162 INFO L138 SettingsManager]: * Use SBE=true [2021-06-10 14:50:49,162 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-10 14:50:49,162 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-10 14:50:49,162 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-10 14:50:49,162 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-10 14:50:49,163 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-10 14:50:49,163 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-10 14:50:49,163 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-10 14:50:49,163 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-10 14:50:49,163 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-10 14:50:49,163 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-10 14:50:49,163 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-10 14:50:49,164 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-10 14:50:49,164 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-10 14:50:49,164 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-10 14:50:49,164 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-10 14:50:49,164 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-10 14:50:49,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-10 14:50:49,164 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-10 14:50:49,164 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-10 14:50:49,164 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-10 14:50:49,165 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-10 14:50:49,165 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-10 14:50:49,165 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-10 14:50:49,165 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-06-10 14:50:49,165 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-10 14:50:49,415 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-10 14:50:49,447 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-10 14:50:49,448 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-10 14:50:49,449 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-10 14:50:49,450 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-10 14:50:49,450 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_4.bpl [2021-06-10 14:50:49,450 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_4.bpl' [2021-06-10 14:50:49,476 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-10 14:50:49,477 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-10 14:50:49,478 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-10 14:50:49,478 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-10 14:50:49,479 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-10 14:50:49,487 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:50:49" (1/1) ... [2021-06-10 14:50:49,491 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:50:49" (1/1) ... [2021-06-10 14:50:49,498 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-10 14:50:49,499 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-10 14:50:49,499 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-10 14:50:49,499 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-10 14:50:49,504 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:50:49" (1/1) ... [2021-06-10 14:50:49,504 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:50:49" (1/1) ... [2021-06-10 14:50:49,505 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:50:49" (1/1) ... [2021-06-10 14:50:49,505 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:50:49" (1/1) ... [2021-06-10 14:50:49,506 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:50:49" (1/1) ... [2021-06-10 14:50:49,507 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:50:49" (1/1) ... [2021-06-10 14:50:49,507 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:50:49" (1/1) ... [2021-06-10 14:50:49,508 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-10 14:50:49,508 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-10 14:50:49,508 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-10 14:50:49,508 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-10 14:50:49,509 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:50:49" (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 [2021-06-10 14:50:49,567 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_1 given in one single declaration [2021-06-10 14:50:49,567 INFO L130 BoogieDeclarations]: Found specification of procedure set_1 [2021-06-10 14:50:49,567 INFO L138 BoogieDeclarations]: Found implementation of procedure set_1 [2021-06-10 14:50:49,568 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_2 given in one single declaration [2021-06-10 14:50:49,572 INFO L130 BoogieDeclarations]: Found specification of procedure set_2 [2021-06-10 14:50:49,573 INFO L138 BoogieDeclarations]: Found implementation of procedure set_2 [2021-06-10 14:50:49,573 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_3 given in one single declaration [2021-06-10 14:50:49,573 INFO L130 BoogieDeclarations]: Found specification of procedure set_3 [2021-06-10 14:50:49,573 INFO L138 BoogieDeclarations]: Found implementation of procedure set_3 [2021-06-10 14:50:49,573 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_0 given in one single declaration [2021-06-10 14:50:49,573 INFO L130 BoogieDeclarations]: Found specification of procedure set_0 [2021-06-10 14:50:49,573 INFO L138 BoogieDeclarations]: Found implementation of procedure set_0 [2021-06-10 14:50:49,573 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-10 14:50:49,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-10 14:50:49,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-10 14:50:49,574 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-10 14:50:49,684 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-10 14:50:49,684 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-10 14:50:49,686 INFO L202 PluginConnector]: Adding new model example_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.06 02:50:49 BoogieIcfgContainer [2021-06-10 14:50:49,686 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-10 14:50:49,688 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-10 14:50:49,688 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-10 14:50:49,690 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-10 14:50:49,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 02:50:49" (1/2) ... [2021-06-10 14:50:49,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7710ec92 and model type example_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.06 02:50:49, skipping insertion in model container [2021-06-10 14:50:49,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.06 02:50:49" (2/2) ... [2021-06-10 14:50:49,693 INFO L111 eAbstractionObserver]: Analyzing ICFG example_4.bpl [2021-06-10 14:50:49,701 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-10 14:50:49,703 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-06-10 14:50:49,704 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-10 14:50:49,789 INFO L149 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2021-06-10 14:50:49,802 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-10 14:50:49,816 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 14:50:49,816 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 14:50:49,816 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 14:50:49,816 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 14:50:49,816 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 14:50:49,816 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 14:50:49,816 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 14:50:49,817 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 14:50:49,839 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 36 places, 35 transitions, 138 flow [2021-06-10 14:50:49,885 INFO L129 PetriNetUnfolder]: 17/47 cut-off events. [2021-06-10 14:50:49,885 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-06-10 14:50:49,887 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. [2021-06-10 14:50:49,888 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 35 transitions, 138 flow [2021-06-10 14:50:49,890 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 29 transitions, 118 flow [2021-06-10 14:50:49,915 INFO L129 PetriNetUnfolder]: 17/44 cut-off events. [2021-06-10 14:50:49,915 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-06-10 14:50:49,915 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:50:49,916 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:50:49,916 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:50:49,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:50:49,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1165854259, now seen corresponding path program 1 times [2021-06-10 14:50:49,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:50:49,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666181169] [2021-06-10 14:50:49,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:50:49,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:50:50,023 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:50,024 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:50:50,033 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:50,034 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:50:50,048 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:50,049 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:50:50,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:50:50,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666181169] [2021-06-10 14:50:50,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:50:50,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-10 14:50:50,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124775260] [2021-06-10 14:50:50,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:50:50,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:50:50,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:50:50,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:50:50,072 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 35 [2021-06-10 14:50:50,074 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 29 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:50,075 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:50:50,075 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 35 [2021-06-10 14:50:50,075 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:50:50,112 INFO L129 PetriNetUnfolder]: 14/41 cut-off events. [2021-06-10 14:50:50,112 INFO L130 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2021-06-10 14:50:50,113 INFO L84 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 41 events. 14/41 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 82 event pairs, 0 based on Foata normal form. 1/42 useless extension candidates. Maximal degree in co-relation 39. Up to 12 conditions per place. [2021-06-10 14:50:50,114 INFO L132 encePairwiseOnDemand]: 33/35 looper letters, 3 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2021-06-10 14:50:50,115 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 28 transitions, 121 flow [2021-06-10 14:50:50,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:50:50,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:50:50,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2021-06-10 14:50:50,123 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9047619047619048 [2021-06-10 14:50:50,123 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 95 transitions. [2021-06-10 14:50:50,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 95 transitions. [2021-06-10 14:50:50,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:50:50,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 95 transitions. [2021-06-10 14:50:50,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:50,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:50,133 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:50,135 INFO L185 Difference]: Start difference. First operand has 30 places, 29 transitions, 118 flow. Second operand 3 states and 95 transitions. [2021-06-10 14:50:50,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 28 transitions, 121 flow [2021-06-10 14:50:50,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 28 transitions, 83 flow, removed 0 selfloop flow, removed 8 redundant places. [2021-06-10 14:50:50,142 INFO L241 Difference]: Finished difference. Result has 24 places, 28 transitions, 77 flow [2021-06-10 14:50:50,143 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=24, PETRI_TRANSITIONS=28} [2021-06-10 14:50:50,144 INFO L343 CegarLoopForPetriNet]: 30 programPoint places, -6 predicate places. [2021-06-10 14:50:50,144 INFO L480 AbstractCegarLoop]: Abstraction has has 24 places, 28 transitions, 77 flow [2021-06-10 14:50:50,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:50,144 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:50:50,144 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:50:50,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-10 14:50:50,144 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:50:50,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:50:50,145 INFO L82 PathProgramCache]: Analyzing trace with hash 899557645, now seen corresponding path program 1 times [2021-06-10 14:50:50,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:50:50,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865764172] [2021-06-10 14:50:50,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:50:50,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:50:50,175 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:50,175 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:50:50,176 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:50,176 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:50:50,179 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:50,179 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:50:50,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:50:50,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865764172] [2021-06-10 14:50:50,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:50:50,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-10 14:50:50,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28673983] [2021-06-10 14:50:50,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:50:50,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:50:50,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:50:50,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:50:50,182 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 35 [2021-06-10 14:50:50,182 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 28 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:50,182 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:50:50,182 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 35 [2021-06-10 14:50:50,182 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:50:50,190 INFO L129 PetriNetUnfolder]: 6/29 cut-off events. [2021-06-10 14:50:50,190 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-06-10 14:50:50,190 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 29 events. 6/29 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 52 event pairs, 0 based on Foata normal form. 3/32 useless extension candidates. Maximal degree in co-relation 34. Up to 6 conditions per place. [2021-06-10 14:50:50,190 INFO L132 encePairwiseOnDemand]: 32/35 looper letters, 2 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2021-06-10 14:50:50,190 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 26 transitions, 77 flow [2021-06-10 14:50:50,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:50:50,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:50:50,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2021-06-10 14:50:50,192 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9047619047619048 [2021-06-10 14:50:50,192 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 95 transitions. [2021-06-10 14:50:50,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 95 transitions. [2021-06-10 14:50:50,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:50:50,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 95 transitions. [2021-06-10 14:50:50,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:50,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:50,193 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:50,193 INFO L185 Difference]: Start difference. First operand has 24 places, 28 transitions, 77 flow. Second operand 3 states and 95 transitions. [2021-06-10 14:50:50,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 26 transitions, 77 flow [2021-06-10 14:50:50,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 26 transitions, 76 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-06-10 14:50:50,195 INFO L241 Difference]: Finished difference. Result has 25 places, 26 transitions, 72 flow [2021-06-10 14:50:50,195 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=25, PETRI_TRANSITIONS=26} [2021-06-10 14:50:50,195 INFO L343 CegarLoopForPetriNet]: 30 programPoint places, -5 predicate places. [2021-06-10 14:50:50,195 INFO L480 AbstractCegarLoop]: Abstraction has has 25 places, 26 transitions, 72 flow [2021-06-10 14:50:50,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:50,195 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:50:50,195 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:50:50,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-10 14:50:50,196 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:50:50,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:50:50,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1874494541, now seen corresponding path program 1 times [2021-06-10 14:50:50,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:50:50,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194864678] [2021-06-10 14:50:50,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:50:50,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:50:50,208 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:50,210 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:50:50,211 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:50,211 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 14:50:50,215 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:50,216 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:50:50,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:50:50,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194864678] [2021-06-10 14:50:50,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:50:50,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-10 14:50:50,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475556375] [2021-06-10 14:50:50,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 14:50:50,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:50:50,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 14:50:50,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 14:50:50,221 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 35 [2021-06-10 14:50:50,221 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 26 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:50,221 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:50:50,221 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 35 [2021-06-10 14:50:50,221 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:50:50,227 INFO L129 PetriNetUnfolder]: 0/17 cut-off events. [2021-06-10 14:50:50,228 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-06-10 14:50:50,228 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 17 events. 0/17 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 20 event pairs, 0 based on Foata normal form. 3/20 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-06-10 14:50:50,228 INFO L132 encePairwiseOnDemand]: 31/35 looper letters, 1 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2021-06-10 14:50:50,228 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 17 transitions, 49 flow [2021-06-10 14:50:50,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 14:50:50,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 14:50:50,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2021-06-10 14:50:50,229 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9047619047619048 [2021-06-10 14:50:50,229 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 95 transitions. [2021-06-10 14:50:50,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 95 transitions. [2021-06-10 14:50:50,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:50:50,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 95 transitions. [2021-06-10 14:50:50,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:50,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:50,231 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:50,231 INFO L185 Difference]: Start difference. First operand has 25 places, 26 transitions, 72 flow. Second operand 3 states and 95 transitions. [2021-06-10 14:50:50,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 17 transitions, 49 flow [2021-06-10 14:50:50,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 17 transitions, 48 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-06-10 14:50:50,232 INFO L241 Difference]: Finished difference. Result has 26 places, 17 transitions, 46 flow [2021-06-10 14:50:50,232 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=26, PETRI_TRANSITIONS=17} [2021-06-10 14:50:50,232 INFO L343 CegarLoopForPetriNet]: 30 programPoint places, -4 predicate places. [2021-06-10 14:50:50,232 INFO L480 AbstractCegarLoop]: Abstraction has has 26 places, 17 transitions, 46 flow [2021-06-10 14:50:50,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:50,233 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:50:50,233 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:50:50,233 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-10 14:50:50,233 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:50:50,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:50:50,233 INFO L82 PathProgramCache]: Analyzing trace with hash 47653935, now seen corresponding path program 1 times [2021-06-10 14:50:50,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:50:50,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616414264] [2021-06-10 14:50:50,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:50:50,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:50:50,264 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:50,264 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:50:50,276 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:50,277 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 14:50:50,287 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-06-10 14:50:50,288 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-06-10 14:50:50,298 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-06-10 14:50:50,299 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-10 14:50:50,314 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-10 14:50:50,315 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-10 14:50:50,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:50:50,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616414264] [2021-06-10 14:50:50,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:50:50,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 14:50:50,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061179611] [2021-06-10 14:50:50,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-10 14:50:50,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:50:50,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-10 14:50:50,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-10 14:50:50,330 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-06-10 14:50:50,331 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 17 transitions, 46 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) [2021-06-10 14:50:50,331 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:50:50,331 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-06-10 14:50:50,331 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:50:50,382 INFO L129 PetriNetUnfolder]: 15/83 cut-off events. [2021-06-10 14:50:50,382 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 14:50:50,383 INFO L84 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 83 events. 15/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 360 event pairs, 5 based on Foata normal form. 1/80 useless extension candidates. Maximal degree in co-relation 125. Up to 17 conditions per place. [2021-06-10 14:50:50,383 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 9 selfloop transitions, 3 changer transitions 1/25 dead transitions. [2021-06-10 14:50:50,383 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 25 transitions, 88 flow [2021-06-10 14:50:50,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-10 14:50:50,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-10 14:50:50,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-06-10 14:50:50,385 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8952380952380953 [2021-06-10 14:50:50,385 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-06-10 14:50:50,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-06-10 14:50:50,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:50:50,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-06-10 14:50:50,386 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) [2021-06-10 14:50:50,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:50,387 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:50,387 INFO L185 Difference]: Start difference. First operand has 26 places, 17 transitions, 46 flow. Second operand 6 states and 188 transitions. [2021-06-10 14:50:50,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 25 transitions, 88 flow [2021-06-10 14:50:50,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 25 transitions, 87 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-06-10 14:50:50,400 INFO L241 Difference]: Finished difference. Result has 34 places, 19 transitions, 68 flow [2021-06-10 14:50:50,401 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=45, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=68, PETRI_PLACES=34, PETRI_TRANSITIONS=19} [2021-06-10 14:50:50,401 INFO L343 CegarLoopForPetriNet]: 30 programPoint places, 4 predicate places. [2021-06-10 14:50:50,401 INFO L480 AbstractCegarLoop]: Abstraction has has 34 places, 19 transitions, 68 flow [2021-06-10 14:50:50,401 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) [2021-06-10 14:50:50,402 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:50:50,402 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:50:50,402 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-10 14:50:50,402 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:50:50,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:50:50,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1067670187, now seen corresponding path program 2 times [2021-06-10 14:50:50,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:50:50,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389490354] [2021-06-10 14:50:50,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:50:50,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:50:50,441 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:50,442 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:50:50,444 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:50,445 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 14:50:50,453 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:50,454 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 14:50:50,471 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-06-10 14:50:50,472 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-06-10 14:50:50,495 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-10 14:50:50,497 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-10 14:50:50,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:50:50,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389490354] [2021-06-10 14:50:50,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:50:50,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 14:50:50,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393924229] [2021-06-10 14:50:50,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-10 14:50:50,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:50:50,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-10 14:50:50,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-10 14:50:50,514 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-06-10 14:50:50,514 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 19 transitions, 68 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) [2021-06-10 14:50:50,514 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:50:50,514 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-06-10 14:50:50,514 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:50:50,579 INFO L129 PetriNetUnfolder]: 13/107 cut-off events. [2021-06-10 14:50:50,579 INFO L130 PetriNetUnfolder]: For 65/65 co-relation queries the response was YES. [2021-06-10 14:50:50,580 INFO L84 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 107 events. 13/107 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 590 event pairs, 5 based on Foata normal form. 1/103 useless extension candidates. Maximal degree in co-relation 207. Up to 20 conditions per place. [2021-06-10 14:50:50,581 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 9 selfloop transitions, 5 changer transitions 1/27 dead transitions. [2021-06-10 14:50:50,581 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 27 transitions, 133 flow [2021-06-10 14:50:50,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-10 14:50:50,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-10 14:50:50,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-06-10 14:50:50,584 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8952380952380953 [2021-06-10 14:50:50,584 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-06-10 14:50:50,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-06-10 14:50:50,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:50:50,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-06-10 14:50:50,585 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) [2021-06-10 14:50:50,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:50,587 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:50,587 INFO L185 Difference]: Start difference. First operand has 34 places, 19 transitions, 68 flow. Second operand 6 states and 188 transitions. [2021-06-10 14:50:50,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 27 transitions, 133 flow [2021-06-10 14:50:50,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 27 transitions, 123 flow, removed 3 selfloop flow, removed 2 redundant places. [2021-06-10 14:50:50,591 INFO L241 Difference]: Finished difference. Result has 40 places, 21 transitions, 99 flow [2021-06-10 14:50:50,591 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=99, PETRI_PLACES=40, PETRI_TRANSITIONS=21} [2021-06-10 14:50:50,591 INFO L343 CegarLoopForPetriNet]: 30 programPoint places, 10 predicate places. [2021-06-10 14:50:50,591 INFO L480 AbstractCegarLoop]: Abstraction has has 40 places, 21 transitions, 99 flow [2021-06-10 14:50:50,591 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) [2021-06-10 14:50:50,591 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:50:50,591 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:50:50,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-10 14:50:50,592 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:50:50,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:50:50,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1930650155, now seen corresponding path program 3 times [2021-06-10 14:50:50,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:50:50,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749830720] [2021-06-10 14:50:50,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:50:50,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:50:50,641 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:50,641 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:50:50,642 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:50,642 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 14:50:50,650 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-06-10 14:50:50,651 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-06-10 14:50:50,667 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-06-10 14:50:50,668 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-06-10 14:50:50,700 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-10 14:50:50,701 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-10 14:50:50,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:50:50,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749830720] [2021-06-10 14:50:50,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:50:50,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 14:50:50,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343318416] [2021-06-10 14:50:50,717 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-10 14:50:50,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:50:50,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-10 14:50:50,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-10 14:50:50,721 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-06-10 14:50:50,721 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 21 transitions, 99 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) [2021-06-10 14:50:50,721 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:50:50,721 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-06-10 14:50:50,722 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:50:50,760 INFO L129 PetriNetUnfolder]: 12/120 cut-off events. [2021-06-10 14:50:50,761 INFO L130 PetriNetUnfolder]: For 162/169 co-relation queries the response was YES. [2021-06-10 14:50:50,761 INFO L84 FinitePrefix]: Finished finitePrefix Result has 296 conditions, 120 events. 12/120 cut-off events. For 162/169 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 698 event pairs, 2 based on Foata normal form. 1/116 useless extension candidates. Maximal degree in co-relation 281. Up to 23 conditions per place. [2021-06-10 14:50:50,761 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 12 selfloop transitions, 6 changer transitions 3/33 dead transitions. [2021-06-10 14:50:50,762 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 33 transitions, 223 flow [2021-06-10 14:50:50,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-10 14:50:50,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-10 14:50:50,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-06-10 14:50:50,763 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8952380952380953 [2021-06-10 14:50:50,763 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-06-10 14:50:50,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-06-10 14:50:50,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:50:50,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-06-10 14:50:50,763 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) [2021-06-10 14:50:50,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:50,764 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:50,764 INFO L185 Difference]: Start difference. First operand has 40 places, 21 transitions, 99 flow. Second operand 6 states and 188 transitions. [2021-06-10 14:50:50,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 33 transitions, 223 flow [2021-06-10 14:50:50,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 33 transitions, 205 flow, removed 6 selfloop flow, removed 2 redundant places. [2021-06-10 14:50:50,766 INFO L241 Difference]: Finished difference. Result has 46 places, 24 transitions, 145 flow [2021-06-10 14:50:50,766 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=145, PETRI_PLACES=46, PETRI_TRANSITIONS=24} [2021-06-10 14:50:50,766 INFO L343 CegarLoopForPetriNet]: 30 programPoint places, 16 predicate places. [2021-06-10 14:50:50,766 INFO L480 AbstractCegarLoop]: Abstraction has has 46 places, 24 transitions, 145 flow [2021-06-10 14:50:50,766 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) [2021-06-10 14:50:50,766 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:50:50,766 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:50:50,767 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-10 14:50:50,767 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:50:50,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:50:50,767 INFO L82 PathProgramCache]: Analyzing trace with hash 72053995, now seen corresponding path program 4 times [2021-06-10 14:50:50,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:50:50,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167192581] [2021-06-10 14:50:50,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:50:50,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:50:50,790 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:50,791 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:50:50,792 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:50,793 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 14:50:50,798 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:50,798 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 14:50:50,805 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-06-10 14:50:50,806 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-06-10 14:50:50,826 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-10 14:50:50,827 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-10 14:50:50,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:50:50,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167192581] [2021-06-10 14:50:50,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:50:50,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 14:50:50,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251075777] [2021-06-10 14:50:50,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-10 14:50:50,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:50:50,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-10 14:50:50,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-10 14:50:50,840 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-06-10 14:50:50,840 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 24 transitions, 145 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) [2021-06-10 14:50:50,840 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:50:50,840 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-06-10 14:50:50,840 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:50:50,878 INFO L129 PetriNetUnfolder]: 9/128 cut-off events. [2021-06-10 14:50:50,878 INFO L130 PetriNetUnfolder]: For 258/262 co-relation queries the response was YES. [2021-06-10 14:50:50,879 INFO L84 FinitePrefix]: Finished finitePrefix Result has 337 conditions, 128 events. 9/128 cut-off events. For 258/262 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 811 event pairs, 4 based on Foata normal form. 1/127 useless extension candidates. Maximal degree in co-relation 319. Up to 21 conditions per place. [2021-06-10 14:50:50,879 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 11 selfloop transitions, 9 changer transitions 1/33 dead transitions. [2021-06-10 14:50:50,879 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 33 transitions, 251 flow [2021-06-10 14:50:50,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-10 14:50:50,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-10 14:50:50,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-06-10 14:50:50,880 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8952380952380953 [2021-06-10 14:50:50,880 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-06-10 14:50:50,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-06-10 14:50:50,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:50:50,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-06-10 14:50:50,881 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) [2021-06-10 14:50:50,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:50,882 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:50,882 INFO L185 Difference]: Start difference. First operand has 46 places, 24 transitions, 145 flow. Second operand 6 states and 188 transitions. [2021-06-10 14:50:50,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 33 transitions, 251 flow [2021-06-10 14:50:50,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 33 transitions, 229 flow, removed 8 selfloop flow, removed 4 redundant places. [2021-06-10 14:50:50,885 INFO L241 Difference]: Finished difference. Result has 50 places, 27 transitions, 200 flow [2021-06-10 14:50:50,885 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=200, PETRI_PLACES=50, PETRI_TRANSITIONS=27} [2021-06-10 14:50:50,885 INFO L343 CegarLoopForPetriNet]: 30 programPoint places, 20 predicate places. [2021-06-10 14:50:50,885 INFO L480 AbstractCegarLoop]: Abstraction has has 50 places, 27 transitions, 200 flow [2021-06-10 14:50:50,885 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) [2021-06-10 14:50:50,885 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:50:50,885 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:50:50,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-10 14:50:50,886 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:50:50,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:50:50,886 INFO L82 PathProgramCache]: Analyzing trace with hash -359152829, now seen corresponding path program 5 times [2021-06-10 14:50:50,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:50:50,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269193372] [2021-06-10 14:50:50,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:50:50,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:50:50,910 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:50,911 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:50:50,911 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:50,912 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 14:50:50,916 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-06-10 14:50:50,917 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-06-10 14:50:50,925 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-06-10 14:50:50,925 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-06-10 14:50:50,948 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-10 14:50:50,949 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-10 14:50:50,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:50:50,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269193372] [2021-06-10 14:50:50,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:50:50,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 14:50:50,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939397122] [2021-06-10 14:50:50,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-10 14:50:50,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:50:50,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-10 14:50:50,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-10 14:50:50,962 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-06-10 14:50:50,962 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 27 transitions, 200 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) [2021-06-10 14:50:50,962 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:50:50,962 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-06-10 14:50:50,962 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:50:51,008 INFO L129 PetriNetUnfolder]: 9/124 cut-off events. [2021-06-10 14:50:51,008 INFO L130 PetriNetUnfolder]: For 352/359 co-relation queries the response was YES. [2021-06-10 14:50:51,010 INFO L84 FinitePrefix]: Finished finitePrefix Result has 362 conditions, 124 events. 9/124 cut-off events. For 352/359 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 769 event pairs, 4 based on Foata normal form. 3/126 useless extension candidates. Maximal degree in co-relation 343. Up to 20 conditions per place. [2021-06-10 14:50:51,011 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 12 selfloop transitions, 9 changer transitions 2/35 dead transitions. [2021-06-10 14:50:51,011 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 35 transitions, 312 flow [2021-06-10 14:50:51,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-10 14:50:51,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-10 14:50:51,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-06-10 14:50:51,012 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8952380952380953 [2021-06-10 14:50:51,012 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-06-10 14:50:51,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-06-10 14:50:51,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:50:51,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-06-10 14:50:51,013 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) [2021-06-10 14:50:51,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:51,013 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:51,013 INFO L185 Difference]: Start difference. First operand has 50 places, 27 transitions, 200 flow. Second operand 6 states and 188 transitions. [2021-06-10 14:50:51,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 35 transitions, 312 flow [2021-06-10 14:50:51,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 35 transitions, 295 flow, removed 6 selfloop flow, removed 2 redundant places. [2021-06-10 14:50:51,019 INFO L241 Difference]: Finished difference. Result has 56 places, 29 transitions, 250 flow [2021-06-10 14:50:51,020 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=250, PETRI_PLACES=56, PETRI_TRANSITIONS=29} [2021-06-10 14:50:51,020 INFO L343 CegarLoopForPetriNet]: 30 programPoint places, 26 predicate places. [2021-06-10 14:50:51,020 INFO L480 AbstractCegarLoop]: Abstraction has has 56 places, 29 transitions, 250 flow [2021-06-10 14:50:51,021 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) [2021-06-10 14:50:51,021 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:50:51,021 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:50:51,021 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-10 14:50:51,021 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:50:51,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:50:51,021 INFO L82 PathProgramCache]: Analyzing trace with hash 694111931, now seen corresponding path program 6 times [2021-06-10 14:50:51,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:50:51,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579591957] [2021-06-10 14:50:51,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:50:51,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:50:51,045 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:51,046 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:50:51,046 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:51,047 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 14:50:51,051 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:51,051 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 14:50:51,059 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-06-10 14:50:51,062 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-10 14:50:51,075 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-10 14:50:51,076 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-10 14:50:51,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:50:51,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579591957] [2021-06-10 14:50:51,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:50:51,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 14:50:51,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028662905] [2021-06-10 14:50:51,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-10 14:50:51,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:50:51,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-10 14:50:51,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-10 14:50:51,089 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-06-10 14:50:51,090 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 29 transitions, 250 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) [2021-06-10 14:50:51,090 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:50:51,090 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-06-10 14:50:51,090 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:50:51,141 INFO L129 PetriNetUnfolder]: 5/149 cut-off events. [2021-06-10 14:50:51,141 INFO L130 PetriNetUnfolder]: For 543/548 co-relation queries the response was YES. [2021-06-10 14:50:51,142 INFO L84 FinitePrefix]: Finished finitePrefix Result has 466 conditions, 149 events. 5/149 cut-off events. For 543/548 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1016 event pairs, 1 based on Foata normal form. 1/147 useless extension candidates. Maximal degree in co-relation 444. Up to 28 conditions per place. [2021-06-10 14:50:51,142 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 21 selfloop transitions, 8 changer transitions 4/45 dead transitions. [2021-06-10 14:50:51,142 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 45 transitions, 511 flow [2021-06-10 14:50:51,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-10 14:50:51,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-10 14:50:51,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-06-10 14:50:51,146 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8952380952380953 [2021-06-10 14:50:51,146 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-06-10 14:50:51,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-06-10 14:50:51,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:50:51,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-06-10 14:50:51,146 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) [2021-06-10 14:50:51,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:51,147 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:51,147 INFO L185 Difference]: Start difference. First operand has 56 places, 29 transitions, 250 flow. Second operand 6 states and 188 transitions. [2021-06-10 14:50:51,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 45 transitions, 511 flow [2021-06-10 14:50:51,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 45 transitions, 484 flow, removed 8 selfloop flow, removed 3 redundant places. [2021-06-10 14:50:51,150 INFO L241 Difference]: Finished difference. Result has 61 places, 35 transitions, 361 flow [2021-06-10 14:50:51,150 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=361, PETRI_PLACES=61, PETRI_TRANSITIONS=35} [2021-06-10 14:50:51,150 INFO L343 CegarLoopForPetriNet]: 30 programPoint places, 31 predicate places. [2021-06-10 14:50:51,150 INFO L480 AbstractCegarLoop]: Abstraction has has 61 places, 35 transitions, 361 flow [2021-06-10 14:50:51,151 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) [2021-06-10 14:50:51,151 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:50:51,151 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:50:51,151 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-10 14:50:51,151 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:50:51,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:50:51,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1317065419, now seen corresponding path program 7 times [2021-06-10 14:50:51,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:50:51,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041886362] [2021-06-10 14:50:51,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:50:51,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:50:51,166 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:51,167 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:50:51,167 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:51,168 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 14:50:51,172 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-06-10 14:50:51,173 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-06-10 14:50:51,180 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-06-10 14:50:51,181 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-10 14:50:51,192 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-10 14:50:51,192 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-10 14:50:51,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:50:51,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041886362] [2021-06-10 14:50:51,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:50:51,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 14:50:51,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328093291] [2021-06-10 14:50:51,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-10 14:50:51,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:50:51,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-10 14:50:51,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-10 14:50:51,205 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-06-10 14:50:51,205 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 35 transitions, 361 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) [2021-06-10 14:50:51,205 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:50:51,205 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-06-10 14:50:51,205 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:50:51,250 INFO L129 PetriNetUnfolder]: 4/148 cut-off events. [2021-06-10 14:50:51,251 INFO L130 PetriNetUnfolder]: For 614/628 co-relation queries the response was YES. [2021-06-10 14:50:51,256 INFO L84 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 148 events. 4/148 cut-off events. For 614/628 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1026 event pairs, 4 based on Foata normal form. 5/152 useless extension candidates. Maximal degree in co-relation 457. Up to 24 conditions per place. [2021-06-10 14:50:51,257 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 11 selfloop transitions, 14 changer transitions 2/39 dead transitions. [2021-06-10 14:50:51,257 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 39 transitions, 458 flow [2021-06-10 14:50:51,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-10 14:50:51,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-10 14:50:51,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2021-06-10 14:50:51,258 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8904761904761904 [2021-06-10 14:50:51,258 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 187 transitions. [2021-06-10 14:50:51,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 187 transitions. [2021-06-10 14:50:51,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:50:51,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 187 transitions. [2021-06-10 14:50:51,259 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) [2021-06-10 14:50:51,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:51,260 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:51,260 INFO L185 Difference]: Start difference. First operand has 61 places, 35 transitions, 361 flow. Second operand 6 states and 187 transitions. [2021-06-10 14:50:51,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 39 transitions, 458 flow [2021-06-10 14:50:51,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 39 transitions, 445 flow, removed 4 selfloop flow, removed 3 redundant places. [2021-06-10 14:50:51,264 INFO L241 Difference]: Finished difference. Result has 65 places, 35 transitions, 393 flow [2021-06-10 14:50:51,264 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=393, PETRI_PLACES=65, PETRI_TRANSITIONS=35} [2021-06-10 14:50:51,264 INFO L343 CegarLoopForPetriNet]: 30 programPoint places, 35 predicate places. [2021-06-10 14:50:51,264 INFO L480 AbstractCegarLoop]: Abstraction has has 65 places, 35 transitions, 393 flow [2021-06-10 14:50:51,265 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) [2021-06-10 14:50:51,265 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:50:51,265 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:50:51,265 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-10 14:50:51,265 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:50:51,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:50:51,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1896895597, now seen corresponding path program 8 times [2021-06-10 14:50:51,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:50:51,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795912469] [2021-06-10 14:50:51,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:50:51,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:50:51,304 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:51,304 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:50:51,305 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:51,305 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 14:50:51,309 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:51,310 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 14:50:51,316 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-06-10 14:50:51,317 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-10 14:50:51,335 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-10 14:50:51,335 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-10 14:50:51,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:50:51,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795912469] [2021-06-10 14:50:51,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:50:51,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 14:50:51,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774488638] [2021-06-10 14:50:51,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-10 14:50:51,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:50:51,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-10 14:50:51,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-10 14:50:51,349 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-06-10 14:50:51,349 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 35 transitions, 393 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) [2021-06-10 14:50:51,349 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:50:51,350 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-06-10 14:50:51,350 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:50:51,396 INFO L129 PetriNetUnfolder]: 4/141 cut-off events. [2021-06-10 14:50:51,396 INFO L130 PetriNetUnfolder]: For 712/727 co-relation queries the response was YES. [2021-06-10 14:50:51,397 INFO L84 FinitePrefix]: Finished finitePrefix Result has 486 conditions, 141 events. 4/141 cut-off events. For 712/727 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 942 event pairs, 4 based on Foata normal form. 5/145 useless extension candidates. Maximal degree in co-relation 461. Up to 22 conditions per place. [2021-06-10 14:50:51,397 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 14 selfloop transitions, 12 changer transitions 5/43 dead transitions. [2021-06-10 14:50:51,397 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 43 transitions, 557 flow [2021-06-10 14:50:51,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-10 14:50:51,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-10 14:50:51,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-06-10 14:50:51,398 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8952380952380953 [2021-06-10 14:50:51,398 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-06-10 14:50:51,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-06-10 14:50:51,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:50:51,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-06-10 14:50:51,399 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) [2021-06-10 14:50:51,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:51,399 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:51,399 INFO L185 Difference]: Start difference. First operand has 65 places, 35 transitions, 393 flow. Second operand 6 states and 188 transitions. [2021-06-10 14:50:51,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 43 transitions, 557 flow [2021-06-10 14:50:51,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 43 transitions, 509 flow, removed 8 selfloop flow, removed 6 redundant places. [2021-06-10 14:50:51,402 INFO L241 Difference]: Finished difference. Result has 64 places, 34 transitions, 373 flow [2021-06-10 14:50:51,402 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=373, PETRI_PLACES=64, PETRI_TRANSITIONS=34} [2021-06-10 14:50:51,403 INFO L343 CegarLoopForPetriNet]: 30 programPoint places, 34 predicate places. [2021-06-10 14:50:51,403 INFO L480 AbstractCegarLoop]: Abstraction has has 64 places, 34 transitions, 373 flow [2021-06-10 14:50:51,403 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) [2021-06-10 14:50:51,403 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:50:51,403 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:50:51,403 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-10 14:50:51,403 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:50:51,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:50:51,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1912364347, now seen corresponding path program 9 times [2021-06-10 14:50:51,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:50:51,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738262611] [2021-06-10 14:50:51,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:50:51,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:50:51,414 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:51,414 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:50:51,415 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:51,415 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 14:50:51,418 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:51,419 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 14:50:51,425 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-06-10 14:50:51,426 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-10 14:50:51,439 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-10 14:50:51,439 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-10 14:50:51,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:50:51,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738262611] [2021-06-10 14:50:51,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:50:51,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 14:50:51,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981584881] [2021-06-10 14:50:51,450 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-10 14:50:51,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:50:51,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-10 14:50:51,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-10 14:50:51,450 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-06-10 14:50:51,451 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 34 transitions, 373 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) [2021-06-10 14:50:51,451 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:50:51,451 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-06-10 14:50:51,451 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:50:51,491 INFO L129 PetriNetUnfolder]: 4/122 cut-off events. [2021-06-10 14:50:51,491 INFO L130 PetriNetUnfolder]: For 569/586 co-relation queries the response was YES. [2021-06-10 14:50:51,491 INFO L84 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 122 events. 4/122 cut-off events. For 569/586 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 755 event pairs, 4 based on Foata normal form. 6/127 useless extension candidates. Maximal degree in co-relation 398. Up to 20 conditions per place. [2021-06-10 14:50:51,492 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 11 selfloop transitions, 11 changer transitions 3/37 dead transitions. [2021-06-10 14:50:51,492 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 37 transitions, 455 flow [2021-06-10 14:50:51,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-10 14:50:51,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-10 14:50:51,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2021-06-10 14:50:51,493 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8904761904761904 [2021-06-10 14:50:51,493 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 187 transitions. [2021-06-10 14:50:51,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 187 transitions. [2021-06-10 14:50:51,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:50:51,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 187 transitions. [2021-06-10 14:50:51,493 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) [2021-06-10 14:50:51,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:51,494 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:51,494 INFO L185 Difference]: Start difference. First operand has 64 places, 34 transitions, 373 flow. Second operand 6 states and 187 transitions. [2021-06-10 14:50:51,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 37 transitions, 455 flow [2021-06-10 14:50:51,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 37 transitions, 380 flow, removed 11 selfloop flow, removed 8 redundant places. [2021-06-10 14:50:51,496 INFO L241 Difference]: Finished difference. Result has 62 places, 33 transitions, 327 flow [2021-06-10 14:50:51,496 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=327, PETRI_PLACES=62, PETRI_TRANSITIONS=33} [2021-06-10 14:50:51,496 INFO L343 CegarLoopForPetriNet]: 30 programPoint places, 32 predicate places. [2021-06-10 14:50:51,496 INFO L480 AbstractCegarLoop]: Abstraction has has 62 places, 33 transitions, 327 flow [2021-06-10 14:50:51,497 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) [2021-06-10 14:50:51,497 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:50:51,497 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:50:51,497 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-10 14:50:51,497 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:50:51,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:50:51,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1762812769, now seen corresponding path program 10 times [2021-06-10 14:50:51,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:50:51,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981311183] [2021-06-10 14:50:51,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:50:51,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:50:51,526 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:51,527 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:50:51,528 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:51,529 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 14:50:51,532 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:51,533 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 14:50:51,539 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-06-10 14:50:51,540 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-10 14:50:51,549 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-10 14:50:51,550 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-10 14:50:51,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:50:51,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981311183] [2021-06-10 14:50:51,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:50:51,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 14:50:51,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694760659] [2021-06-10 14:50:51,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-10 14:50:51,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:50:51,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-10 14:50:51,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-10 14:50:51,562 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-06-10 14:50:51,562 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 33 transitions, 327 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) [2021-06-10 14:50:51,562 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:50:51,562 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-06-10 14:50:51,562 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:50:51,599 INFO L129 PetriNetUnfolder]: 4/112 cut-off events. [2021-06-10 14:50:51,600 INFO L130 PetriNetUnfolder]: For 373/388 co-relation queries the response was YES. [2021-06-10 14:50:51,600 INFO L84 FinitePrefix]: Finished finitePrefix Result has 370 conditions, 112 events. 4/112 cut-off events. For 373/388 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 647 event pairs, 4 based on Foata normal form. 5/116 useless extension candidates. Maximal degree in co-relation 350. Up to 18 conditions per place. [2021-06-10 14:50:51,600 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 12 selfloop transitions, 10 changer transitions 3/37 dead transitions. [2021-06-10 14:50:51,600 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 37 transitions, 418 flow [2021-06-10 14:50:51,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-10 14:50:51,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-10 14:50:51,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-06-10 14:50:51,601 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8952380952380953 [2021-06-10 14:50:51,601 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-06-10 14:50:51,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-06-10 14:50:51,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:50:51,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-06-10 14:50:51,602 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) [2021-06-10 14:50:51,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:51,602 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:51,602 INFO L185 Difference]: Start difference. First operand has 62 places, 33 transitions, 327 flow. Second operand 6 states and 188 transitions. [2021-06-10 14:50:51,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 37 transitions, 418 flow [2021-06-10 14:50:51,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 37 transitions, 382 flow, removed 5 selfloop flow, removed 5 redundant places. [2021-06-10 14:50:51,605 INFO L241 Difference]: Finished difference. Result has 62 places, 32 transitions, 318 flow [2021-06-10 14:50:51,605 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=318, PETRI_PLACES=62, PETRI_TRANSITIONS=32} [2021-06-10 14:50:51,606 INFO L343 CegarLoopForPetriNet]: 30 programPoint places, 32 predicate places. [2021-06-10 14:50:51,606 INFO L480 AbstractCegarLoop]: Abstraction has has 62 places, 32 transitions, 318 flow [2021-06-10 14:50:51,606 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) [2021-06-10 14:50:51,606 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:50:51,606 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:50:51,606 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-10 14:50:51,606 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:50:51,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:50:51,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1190313287, now seen corresponding path program 11 times [2021-06-10 14:50:51,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:50:51,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015586233] [2021-06-10 14:50:51,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:50:51,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:50:51,623 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:51,623 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:50:51,624 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:51,624 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 14:50:51,630 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-06-10 14:50:51,630 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-10 14:50:51,644 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-06-10 14:50:51,644 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-06-10 14:50:51,656 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-10 14:50:51,660 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-10 14:50:51,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:50:51,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015586233] [2021-06-10 14:50:51,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:50:51,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 14:50:51,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115344167] [2021-06-10 14:50:51,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-10 14:50:51,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:50:51,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-10 14:50:51,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-10 14:50:51,674 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-06-10 14:50:51,674 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 32 transitions, 318 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) [2021-06-10 14:50:51,674 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:50:51,674 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-06-10 14:50:51,674 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:50:51,716 INFO L129 PetriNetUnfolder]: 2/126 cut-off events. [2021-06-10 14:50:51,716 INFO L130 PetriNetUnfolder]: For 382/382 co-relation queries the response was YES. [2021-06-10 14:50:51,716 INFO L84 FinitePrefix]: Finished finitePrefix Result has 405 conditions, 126 events. 2/126 cut-off events. For 382/382 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 801 event pairs, 1 based on Foata normal form. 1/126 useless extension candidates. Maximal degree in co-relation 386. Up to 21 conditions per place. [2021-06-10 14:50:51,717 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 17 selfloop transitions, 11 changer transitions 2/42 dead transitions. [2021-06-10 14:50:51,717 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 42 transitions, 495 flow [2021-06-10 14:50:51,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-10 14:50:51,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-10 14:50:51,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-06-10 14:50:51,718 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8952380952380953 [2021-06-10 14:50:51,718 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-06-10 14:50:51,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-06-10 14:50:51,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:50:51,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-06-10 14:50:51,719 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) [2021-06-10 14:50:51,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:51,719 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:51,719 INFO L185 Difference]: Start difference. First operand has 62 places, 32 transitions, 318 flow. Second operand 6 states and 188 transitions. [2021-06-10 14:50:51,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 42 transitions, 495 flow [2021-06-10 14:50:51,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 42 transitions, 464 flow, removed 3 selfloop flow, removed 3 redundant places. [2021-06-10 14:50:51,721 INFO L241 Difference]: Finished difference. Result has 67 places, 35 transitions, 395 flow [2021-06-10 14:50:51,721 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=395, PETRI_PLACES=67, PETRI_TRANSITIONS=35} [2021-06-10 14:50:51,721 INFO L343 CegarLoopForPetriNet]: 30 programPoint places, 37 predicate places. [2021-06-10 14:50:51,722 INFO L480 AbstractCegarLoop]: Abstraction has has 67 places, 35 transitions, 395 flow [2021-06-10 14:50:51,722 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) [2021-06-10 14:50:51,722 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:50:51,722 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:50:51,722 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-10 14:50:51,722 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:50:51,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:50:51,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1439433423, now seen corresponding path program 12 times [2021-06-10 14:50:51,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:50:51,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539815979] [2021-06-10 14:50:51,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:50:51,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:50:51,740 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:51,740 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:50:51,741 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:51,741 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 14:50:51,745 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-06-10 14:50:51,745 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-10 14:50:51,758 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-06-10 14:50:51,759 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-06-10 14:50:51,769 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-10 14:50:51,769 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-10 14:50:51,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:50:51,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539815979] [2021-06-10 14:50:51,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:50:51,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 14:50:51,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50794765] [2021-06-10 14:50:51,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-10 14:50:51,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:50:51,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-10 14:50:51,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-10 14:50:51,781 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-06-10 14:50:51,781 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 35 transitions, 395 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) [2021-06-10 14:50:51,781 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:50:51,781 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-06-10 14:50:51,782 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:50:51,813 INFO L129 PetriNetUnfolder]: 2/117 cut-off events. [2021-06-10 14:50:51,813 INFO L130 PetriNetUnfolder]: For 423/426 co-relation queries the response was YES. [2021-06-10 14:50:51,813 INFO L84 FinitePrefix]: Finished finitePrefix Result has 402 conditions, 117 events. 2/117 cut-off events. For 423/426 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 714 event pairs, 0 based on Foata normal form. 1/117 useless extension candidates. Maximal degree in co-relation 380. Up to 20 conditions per place. [2021-06-10 14:50:51,813 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 19 selfloop transitions, 10 changer transitions 2/43 dead transitions. [2021-06-10 14:50:51,814 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 43 transitions, 531 flow [2021-06-10 14:50:51,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-10 14:50:51,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-10 14:50:51,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-06-10 14:50:51,814 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8952380952380953 [2021-06-10 14:50:51,814 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-06-10 14:50:51,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-06-10 14:50:51,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:50:51,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-06-10 14:50:51,815 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) [2021-06-10 14:50:51,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:51,816 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:51,816 INFO L185 Difference]: Start difference. First operand has 67 places, 35 transitions, 395 flow. Second operand 6 states and 188 transitions. [2021-06-10 14:50:51,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 43 transitions, 531 flow [2021-06-10 14:50:51,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 43 transitions, 510 flow, removed 6 selfloop flow, removed 3 redundant places. [2021-06-10 14:50:51,818 INFO L241 Difference]: Finished difference. Result has 71 places, 37 transitions, 440 flow [2021-06-10 14:50:51,818 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=440, PETRI_PLACES=71, PETRI_TRANSITIONS=37} [2021-06-10 14:50:51,818 INFO L343 CegarLoopForPetriNet]: 30 programPoint places, 41 predicate places. [2021-06-10 14:50:51,818 INFO L480 AbstractCegarLoop]: Abstraction has has 71 places, 37 transitions, 440 flow [2021-06-10 14:50:51,819 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) [2021-06-10 14:50:51,819 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:50:51,819 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:50:51,819 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-10 14:50:51,819 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:50:51,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:50:51,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1233407489, now seen corresponding path program 13 times [2021-06-10 14:50:51,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:50:51,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449917390] [2021-06-10 14:50:51,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:50:51,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:50:51,850 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:51,850 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:50:51,851 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:51,851 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 14:50:51,855 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-06-10 14:50:51,855 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-10 14:50:51,870 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-06-10 14:50:51,871 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-06-10 14:50:51,883 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-10 14:50:51,883 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-10 14:50:51,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:50:51,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449917390] [2021-06-10 14:50:51,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:50:51,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 14:50:51,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251485136] [2021-06-10 14:50:51,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-10 14:50:51,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:50:51,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-10 14:50:51,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-10 14:50:51,899 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-06-10 14:50:51,899 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 37 transitions, 440 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) [2021-06-10 14:50:51,899 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:50:51,899 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-06-10 14:50:51,899 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:50:51,928 INFO L129 PetriNetUnfolder]: 2/108 cut-off events. [2021-06-10 14:50:51,928 INFO L130 PetriNetUnfolder]: For 453/453 co-relation queries the response was YES. [2021-06-10 14:50:51,928 INFO L84 FinitePrefix]: Finished finitePrefix Result has 400 conditions, 108 events. 2/108 cut-off events. For 453/453 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 630 event pairs, 0 based on Foata normal form. 1/109 useless extension candidates. Maximal degree in co-relation 377. Up to 20 conditions per place. [2021-06-10 14:50:51,928 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 17 selfloop transitions, 9 changer transitions 3/41 dead transitions. [2021-06-10 14:50:51,928 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 41 transitions, 529 flow [2021-06-10 14:50:51,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-10 14:50:51,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-10 14:50:51,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2021-06-10 14:50:51,929 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8904761904761904 [2021-06-10 14:50:51,929 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 187 transitions. [2021-06-10 14:50:51,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 187 transitions. [2021-06-10 14:50:51,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:50:51,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 187 transitions. [2021-06-10 14:50:51,930 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) [2021-06-10 14:50:51,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:51,930 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:51,931 INFO L185 Difference]: Start difference. First operand has 71 places, 37 transitions, 440 flow. Second operand 6 states and 187 transitions. [2021-06-10 14:50:51,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 41 transitions, 529 flow [2021-06-10 14:50:51,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 41 transitions, 518 flow, removed 3 selfloop flow, removed 2 redundant places. [2021-06-10 14:50:51,936 INFO L241 Difference]: Finished difference. Result has 74 places, 34 transitions, 405 flow [2021-06-10 14:50:51,937 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=405, PETRI_PLACES=74, PETRI_TRANSITIONS=34} [2021-06-10 14:50:51,937 INFO L343 CegarLoopForPetriNet]: 30 programPoint places, 44 predicate places. [2021-06-10 14:50:51,937 INFO L480 AbstractCegarLoop]: Abstraction has has 74 places, 34 transitions, 405 flow [2021-06-10 14:50:51,937 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) [2021-06-10 14:50:51,937 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:50:51,937 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:50:51,938 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-10 14:50:51,938 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:50:51,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:50:51,939 INFO L82 PathProgramCache]: Analyzing trace with hash -873309823, now seen corresponding path program 14 times [2021-06-10 14:50:51,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:50:51,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696885312] [2021-06-10 14:50:51,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:50:51,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:50:51,949 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:51,949 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:50:51,950 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:51,950 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 14:50:51,954 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-06-10 14:50:51,955 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-06-10 14:50:51,962 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-06-10 14:50:51,963 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-10 14:50:51,974 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-10 14:50:51,975 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-10 14:50:51,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:50:51,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696885312] [2021-06-10 14:50:51,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:50:51,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 14:50:51,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746438615] [2021-06-10 14:50:51,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-10 14:50:51,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:50:51,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-10 14:50:51,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-10 14:50:51,987 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-06-10 14:50:51,987 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 34 transitions, 405 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) [2021-06-10 14:50:51,987 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:50:51,987 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-06-10 14:50:51,987 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:50:52,023 INFO L129 PetriNetUnfolder]: 2/97 cut-off events. [2021-06-10 14:50:52,024 INFO L130 PetriNetUnfolder]: For 422/422 co-relation queries the response was YES. [2021-06-10 14:50:52,024 INFO L84 FinitePrefix]: Finished finitePrefix Result has 374 conditions, 97 events. 2/97 cut-off events. For 422/422 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 526 event pairs, 0 based on Foata normal form. 1/98 useless extension candidates. Maximal degree in co-relation 351. Up to 14 conditions per place. [2021-06-10 14:50:52,024 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 13 selfloop transitions, 9 changer transitions 3/37 dead transitions. [2021-06-10 14:50:52,024 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 37 transitions, 482 flow [2021-06-10 14:50:52,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-10 14:50:52,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-10 14:50:52,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2021-06-10 14:50:52,025 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8904761904761904 [2021-06-10 14:50:52,025 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 187 transitions. [2021-06-10 14:50:52,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 187 transitions. [2021-06-10 14:50:52,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:50:52,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 187 transitions. [2021-06-10 14:50:52,026 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) [2021-06-10 14:50:52,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:52,026 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:52,026 INFO L185 Difference]: Start difference. First operand has 74 places, 34 transitions, 405 flow. Second operand 6 states and 187 transitions. [2021-06-10 14:50:52,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 37 transitions, 482 flow [2021-06-10 14:50:52,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 37 transitions, 446 flow, removed 7 selfloop flow, removed 5 redundant places. [2021-06-10 14:50:52,029 INFO L241 Difference]: Finished difference. Result has 74 places, 32 transitions, 362 flow [2021-06-10 14:50:52,029 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=362, PETRI_PLACES=74, PETRI_TRANSITIONS=32} [2021-06-10 14:50:52,029 INFO L343 CegarLoopForPetriNet]: 30 programPoint places, 44 predicate places. [2021-06-10 14:50:52,029 INFO L480 AbstractCegarLoop]: Abstraction has has 74 places, 32 transitions, 362 flow [2021-06-10 14:50:52,030 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) [2021-06-10 14:50:52,030 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:50:52,030 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:50:52,030 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-06-10 14:50:52,030 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:50:52,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:50:52,030 INFO L82 PathProgramCache]: Analyzing trace with hash -557705213, now seen corresponding path program 15 times [2021-06-10 14:50:52,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:50:52,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049475913] [2021-06-10 14:50:52,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:50:52,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:50:52,052 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:52,053 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:50:52,053 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:52,054 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 14:50:52,058 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:52,058 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 14:50:52,067 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-06-10 14:50:52,068 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-10 14:50:52,078 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-10 14:50:52,079 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-10 14:50:52,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:50:52,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049475913] [2021-06-10 14:50:52,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:50:52,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 14:50:52,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681353226] [2021-06-10 14:50:52,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-10 14:50:52,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:50:52,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-10 14:50:52,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-10 14:50:52,091 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-06-10 14:50:52,091 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 32 transitions, 362 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) [2021-06-10 14:50:52,091 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:50:52,091 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-06-10 14:50:52,091 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:50:52,138 INFO L129 PetriNetUnfolder]: 0/113 cut-off events. [2021-06-10 14:50:52,138 INFO L130 PetriNetUnfolder]: For 471/471 co-relation queries the response was YES. [2021-06-10 14:50:52,138 INFO L84 FinitePrefix]: Finished finitePrefix Result has 418 conditions, 113 events. 0/113 cut-off events. For 471/471 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 679 event pairs, 0 based on Foata normal form. 1/113 useless extension candidates. Maximal degree in co-relation 0. Up to 17 conditions per place. [2021-06-10 14:50:52,138 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 17 selfloop transitions, 10 changer transitions 2/41 dead transitions. [2021-06-10 14:50:52,139 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 41 transitions, 560 flow [2021-06-10 14:50:52,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-10 14:50:52,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-10 14:50:52,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-06-10 14:50:52,140 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8952380952380953 [2021-06-10 14:50:52,140 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-06-10 14:50:52,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-06-10 14:50:52,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:50:52,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-06-10 14:50:52,140 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) [2021-06-10 14:50:52,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:52,141 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:52,141 INFO L185 Difference]: Start difference. First operand has 74 places, 32 transitions, 362 flow. Second operand 6 states and 188 transitions. [2021-06-10 14:50:52,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 41 transitions, 560 flow [2021-06-10 14:50:52,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 41 transitions, 517 flow, removed 7 selfloop flow, removed 5 redundant places. [2021-06-10 14:50:52,143 INFO L241 Difference]: Finished difference. Result has 75 places, 36 transitions, 453 flow [2021-06-10 14:50:52,143 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=453, PETRI_PLACES=75, PETRI_TRANSITIONS=36} [2021-06-10 14:50:52,144 INFO L343 CegarLoopForPetriNet]: 30 programPoint places, 45 predicate places. [2021-06-10 14:50:52,144 INFO L480 AbstractCegarLoop]: Abstraction has has 75 places, 36 transitions, 453 flow [2021-06-10 14:50:52,144 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) [2021-06-10 14:50:52,144 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:50:52,144 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:50:52,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-06-10 14:50:52,145 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:50:52,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:50:52,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1882332563, now seen corresponding path program 16 times [2021-06-10 14:50:52,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:50:52,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084364460] [2021-06-10 14:50:52,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:50:52,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:50:52,155 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:52,155 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:50:52,156 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:52,156 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 14:50:52,160 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:52,160 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 14:50:52,167 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-06-10 14:50:52,172 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-06-10 14:50:52,183 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-10 14:50:52,183 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-10 14:50:52,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:50:52,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084364460] [2021-06-10 14:50:52,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:50:52,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 14:50:52,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719269339] [2021-06-10 14:50:52,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-10 14:50:52,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:50:52,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-10 14:50:52,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-10 14:50:52,196 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-06-10 14:50:52,196 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 36 transitions, 453 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) [2021-06-10 14:50:52,196 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:50:52,196 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-06-10 14:50:52,196 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:50:52,229 INFO L129 PetriNetUnfolder]: 0/104 cut-off events. [2021-06-10 14:50:52,230 INFO L130 PetriNetUnfolder]: For 448/450 co-relation queries the response was YES. [2021-06-10 14:50:52,230 INFO L84 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 104 events. 0/104 cut-off events. For 448/450 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 585 event pairs, 0 based on Foata normal form. 1/105 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2021-06-10 14:50:52,230 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 17 selfloop transitions, 9 changer transitions 2/40 dead transitions. [2021-06-10 14:50:52,230 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 40 transitions, 544 flow [2021-06-10 14:50:52,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-10 14:50:52,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-10 14:50:52,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-06-10 14:50:52,231 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8952380952380953 [2021-06-10 14:50:52,231 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-06-10 14:50:52,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-06-10 14:50:52,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:50:52,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-06-10 14:50:52,232 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) [2021-06-10 14:50:52,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:52,233 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:52,233 INFO L185 Difference]: Start difference. First operand has 75 places, 36 transitions, 453 flow. Second operand 6 states and 188 transitions. [2021-06-10 14:50:52,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 40 transitions, 544 flow [2021-06-10 14:50:52,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 40 transitions, 530 flow, removed 4 selfloop flow, removed 3 redundant places. [2021-06-10 14:50:52,235 INFO L241 Difference]: Finished difference. Result has 79 places, 36 transitions, 463 flow [2021-06-10 14:50:52,236 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=463, PETRI_PLACES=79, PETRI_TRANSITIONS=36} [2021-06-10 14:50:52,236 INFO L343 CegarLoopForPetriNet]: 30 programPoint places, 49 predicate places. [2021-06-10 14:50:52,236 INFO L480 AbstractCegarLoop]: Abstraction has has 79 places, 36 transitions, 463 flow [2021-06-10 14:50:52,237 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) [2021-06-10 14:50:52,237 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:50:52,237 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:50:52,237 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-06-10 14:50:52,237 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:50:52,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:50:52,237 INFO L82 PathProgramCache]: Analyzing trace with hash 452844333, now seen corresponding path program 17 times [2021-06-10 14:50:52,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:50:52,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784692638] [2021-06-10 14:50:52,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:50:52,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:50:52,246 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:52,247 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:50:52,247 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:52,247 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 14:50:52,251 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:52,251 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 14:50:52,258 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-06-10 14:50:52,258 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-10 14:50:52,269 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-10 14:50:52,270 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-10 14:50:52,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:50:52,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784692638] [2021-06-10 14:50:52,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:50:52,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 14:50:52,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433334683] [2021-06-10 14:50:52,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-10 14:50:52,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:50:52,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-10 14:50:52,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-10 14:50:52,281 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-06-10 14:50:52,281 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 36 transitions, 463 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) [2021-06-10 14:50:52,282 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:50:52,282 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-06-10 14:50:52,282 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:50:52,316 INFO L129 PetriNetUnfolder]: 0/95 cut-off events. [2021-06-10 14:50:52,316 INFO L130 PetriNetUnfolder]: For 493/498 co-relation queries the response was YES. [2021-06-10 14:50:52,316 INFO L84 FinitePrefix]: Finished finitePrefix Result has 386 conditions, 95 events. 0/95 cut-off events. For 493/498 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 511 event pairs, 0 based on Foata normal form. 3/98 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2021-06-10 14:50:52,317 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 14 selfloop transitions, 8 changer transitions 3/37 dead transitions. [2021-06-10 14:50:52,317 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 37 transitions, 517 flow [2021-06-10 14:50:52,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-10 14:50:52,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-10 14:50:52,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2021-06-10 14:50:52,317 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8857142857142857 [2021-06-10 14:50:52,317 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 186 transitions. [2021-06-10 14:50:52,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 186 transitions. [2021-06-10 14:50:52,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:50:52,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 186 transitions. [2021-06-10 14:50:52,318 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) [2021-06-10 14:50:52,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:52,318 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:52,318 INFO L185 Difference]: Start difference. First operand has 79 places, 36 transitions, 463 flow. Second operand 6 states and 186 transitions. [2021-06-10 14:50:52,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 37 transitions, 517 flow [2021-06-10 14:50:52,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 37 transitions, 506 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-06-10 14:50:52,321 INFO L241 Difference]: Finished difference. Result has 82 places, 33 transitions, 415 flow [2021-06-10 14:50:52,321 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=415, PETRI_PLACES=82, PETRI_TRANSITIONS=33} [2021-06-10 14:50:52,322 INFO L343 CegarLoopForPetriNet]: 30 programPoint places, 52 predicate places. [2021-06-10 14:50:52,322 INFO L480 AbstractCegarLoop]: Abstraction has has 82 places, 33 transitions, 415 flow [2021-06-10 14:50:52,322 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) [2021-06-10 14:50:52,322 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:50:52,322 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:50:52,322 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-06-10 14:50:52,322 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:50:52,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:50:52,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1627308399, now seen corresponding path program 18 times [2021-06-10 14:50:52,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:50:52,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380585932] [2021-06-10 14:50:52,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:50:52,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:50:52,336 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:52,336 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:50:52,341 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:52,341 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 14:50:52,345 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-06-10 14:50:52,346 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-10 14:50:52,361 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-06-10 14:50:52,362 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-06-10 14:50:52,374 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-10 14:50:52,374 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-10 14:50:52,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:50:52,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380585932] [2021-06-10 14:50:52,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:50:52,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 14:50:52,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579311128] [2021-06-10 14:50:52,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-10 14:50:52,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:50:52,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-10 14:50:52,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-10 14:50:52,386 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-06-10 14:50:52,386 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 33 transitions, 415 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) [2021-06-10 14:50:52,386 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:50:52,386 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-06-10 14:50:52,386 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:50:52,418 INFO L129 PetriNetUnfolder]: 0/82 cut-off events. [2021-06-10 14:50:52,418 INFO L130 PetriNetUnfolder]: For 394/394 co-relation queries the response was YES. [2021-06-10 14:50:52,418 INFO L84 FinitePrefix]: Finished finitePrefix Result has 341 conditions, 82 events. 0/82 cut-off events. For 394/394 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 403 event pairs, 0 based on Foata normal form. 1/83 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2021-06-10 14:50:52,419 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 12 selfloop transitions, 8 changer transitions 3/35 dead transitions. [2021-06-10 14:50:52,419 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 35 transitions, 477 flow [2021-06-10 14:50:52,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-10 14:50:52,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-10 14:50:52,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2021-06-10 14:50:52,420 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8904761904761904 [2021-06-10 14:50:52,420 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 187 transitions. [2021-06-10 14:50:52,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 187 transitions. [2021-06-10 14:50:52,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:50:52,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 187 transitions. [2021-06-10 14:50:52,421 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) [2021-06-10 14:50:52,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:52,425 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:52,425 INFO L185 Difference]: Start difference. First operand has 82 places, 33 transitions, 415 flow. Second operand 6 states and 187 transitions. [2021-06-10 14:50:52,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 35 transitions, 477 flow [2021-06-10 14:50:52,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 35 transitions, 429 flow, removed 6 selfloop flow, removed 7 redundant places. [2021-06-10 14:50:52,427 INFO L241 Difference]: Finished difference. Result has 78 places, 30 transitions, 339 flow [2021-06-10 14:50:52,427 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=339, PETRI_PLACES=78, PETRI_TRANSITIONS=30} [2021-06-10 14:50:52,428 INFO L343 CegarLoopForPetriNet]: 30 programPoint places, 48 predicate places. [2021-06-10 14:50:52,428 INFO L480 AbstractCegarLoop]: Abstraction has has 78 places, 30 transitions, 339 flow [2021-06-10 14:50:52,428 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) [2021-06-10 14:50:52,428 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:50:52,428 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:50:52,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-06-10 14:50:52,428 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:50:52,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:50:52,429 INFO L82 PathProgramCache]: Analyzing trace with hash -445195681, now seen corresponding path program 19 times [2021-06-10 14:50:52,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:50:52,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854030455] [2021-06-10 14:50:52,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:50:52,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:50:52,445 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:52,445 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:50:52,446 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:52,447 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 14:50:52,451 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:52,452 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 14:50:52,459 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-06-10 14:50:52,459 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-10 14:50:52,470 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-10 14:50:52,471 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-10 14:50:52,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:50:52,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854030455] [2021-06-10 14:50:52,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:50:52,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 14:50:52,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818635604] [2021-06-10 14:50:52,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-10 14:50:52,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:50:52,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-10 14:50:52,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-10 14:50:52,482 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-06-10 14:50:52,482 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 30 transitions, 339 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) [2021-06-10 14:50:52,482 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:50:52,482 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-06-10 14:50:52,482 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:50:52,516 INFO L129 PetriNetUnfolder]: 0/71 cut-off events. [2021-06-10 14:50:52,516 INFO L130 PetriNetUnfolder]: For 267/267 co-relation queries the response was YES. [2021-06-10 14:50:52,516 INFO L84 FinitePrefix]: Finished finitePrefix Result has 286 conditions, 71 events. 0/71 cut-off events. For 267/267 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 325 event pairs, 0 based on Foata normal form. 1/72 useless extension candidates. Maximal degree in co-relation 0. Up to 10 conditions per place. [2021-06-10 14:50:52,516 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 9 selfloop transitions, 8 changer transitions 3/32 dead transitions. [2021-06-10 14:50:52,516 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 32 transitions, 395 flow [2021-06-10 14:50:52,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-10 14:50:52,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-10 14:50:52,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2021-06-10 14:50:52,518 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8904761904761904 [2021-06-10 14:50:52,518 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 187 transitions. [2021-06-10 14:50:52,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 187 transitions. [2021-06-10 14:50:52,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:50:52,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 187 transitions. [2021-06-10 14:50:52,518 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) [2021-06-10 14:50:52,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:52,519 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:52,519 INFO L185 Difference]: Start difference. First operand has 78 places, 30 transitions, 339 flow. Second operand 6 states and 187 transitions. [2021-06-10 14:50:52,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 32 transitions, 395 flow [2021-06-10 14:50:52,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 32 transitions, 348 flow, removed 4 selfloop flow, removed 7 redundant places. [2021-06-10 14:50:52,521 INFO L241 Difference]: Finished difference. Result has 72 places, 27 transitions, 271 flow [2021-06-10 14:50:52,521 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=271, PETRI_PLACES=72, PETRI_TRANSITIONS=27} [2021-06-10 14:50:52,522 INFO L343 CegarLoopForPetriNet]: 30 programPoint places, 42 predicate places. [2021-06-10 14:50:52,522 INFO L480 AbstractCegarLoop]: Abstraction has has 72 places, 27 transitions, 271 flow [2021-06-10 14:50:52,522 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) [2021-06-10 14:50:52,522 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:50:52,522 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:50:52,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-06-10 14:50:52,522 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:50:52,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:50:52,522 INFO L82 PathProgramCache]: Analyzing trace with hash 2133833347, now seen corresponding path program 20 times [2021-06-10 14:50:52,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:50:52,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539482948] [2021-06-10 14:50:52,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:50:52,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:50:52,533 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:52,534 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:50:52,534 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:52,534 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 14:50:52,538 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-06-10 14:50:52,539 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-06-10 14:50:52,545 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-06-10 14:50:52,546 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-10 14:50:52,557 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-10 14:50:52,558 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-10 14:50:52,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:50:52,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539482948] [2021-06-10 14:50:52,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:50:52,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 14:50:52,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196381282] [2021-06-10 14:50:52,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-10 14:50:52,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:50:52,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-10 14:50:52,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-10 14:50:52,572 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-06-10 14:50:52,572 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 27 transitions, 271 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) [2021-06-10 14:50:52,572 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:50:52,572 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-06-10 14:50:52,572 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:50:52,603 INFO L129 PetriNetUnfolder]: 0/60 cut-off events. [2021-06-10 14:50:52,603 INFO L130 PetriNetUnfolder]: For 187/189 co-relation queries the response was YES. [2021-06-10 14:50:52,603 INFO L84 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 60 events. 0/60 cut-off events. For 187/189 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 232 event pairs, 0 based on Foata normal form. 1/61 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2021-06-10 14:50:52,604 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 10 selfloop transitions, 6 changer transitions 2/30 dead transitions. [2021-06-10 14:50:52,604 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 30 transitions, 332 flow [2021-06-10 14:50:52,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-10 14:50:52,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-10 14:50:52,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2021-06-10 14:50:52,605 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8904761904761904 [2021-06-10 14:50:52,606 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 187 transitions. [2021-06-10 14:50:52,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 187 transitions. [2021-06-10 14:50:52,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:50:52,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 187 transitions. [2021-06-10 14:50:52,607 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) [2021-06-10 14:50:52,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:52,608 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:52,608 INFO L185 Difference]: Start difference. First operand has 72 places, 27 transitions, 271 flow. Second operand 6 states and 187 transitions. [2021-06-10 14:50:52,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 30 transitions, 332 flow [2021-06-10 14:50:52,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 30 transitions, 285 flow, removed 4 selfloop flow, removed 8 redundant places. [2021-06-10 14:50:52,609 INFO L241 Difference]: Finished difference. Result has 66 places, 26 transitions, 226 flow [2021-06-10 14:50:52,609 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=226, PETRI_PLACES=66, PETRI_TRANSITIONS=26} [2021-06-10 14:50:52,610 INFO L343 CegarLoopForPetriNet]: 30 programPoint places, 36 predicate places. [2021-06-10 14:50:52,610 INFO L480 AbstractCegarLoop]: Abstraction has has 66 places, 26 transitions, 226 flow [2021-06-10 14:50:52,610 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) [2021-06-10 14:50:52,610 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:50:52,610 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:50:52,610 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-06-10 14:50:52,610 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:50:52,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:50:52,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1300245775, now seen corresponding path program 21 times [2021-06-10 14:50:52,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:50:52,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355337035] [2021-06-10 14:50:52,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:50:52,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:50:52,630 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:52,630 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:50:52,631 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:52,631 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 14:50:52,650 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-06-10 14:50:52,650 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-06-10 14:50:52,658 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-06-10 14:50:52,659 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-06-10 14:50:52,669 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-10 14:50:52,670 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-10 14:50:52,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:50:52,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355337035] [2021-06-10 14:50:52,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:50:52,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 14:50:52,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326407726] [2021-06-10 14:50:52,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-10 14:50:52,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:50:52,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-10 14:50:52,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-10 14:50:52,683 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-06-10 14:50:52,683 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 26 transitions, 226 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) [2021-06-10 14:50:52,683 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:50:52,683 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-06-10 14:50:52,683 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:50:52,707 INFO L129 PetriNetUnfolder]: 0/51 cut-off events. [2021-06-10 14:50:52,707 INFO L130 PetriNetUnfolder]: For 133/133 co-relation queries the response was YES. [2021-06-10 14:50:52,707 INFO L84 FinitePrefix]: Finished finitePrefix Result has 193 conditions, 51 events. 0/51 cut-off events. For 133/133 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 164 event pairs, 0 based on Foata normal form. 1/52 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2021-06-10 14:50:52,708 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 8 selfloop transitions, 3 changer transitions 4/27 dead transitions. [2021-06-10 14:50:52,708 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 27 transitions, 268 flow [2021-06-10 14:50:52,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-10 14:50:52,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-10 14:50:52,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2021-06-10 14:50:52,708 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8809523809523809 [2021-06-10 14:50:52,708 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 185 transitions. [2021-06-10 14:50:52,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 185 transitions. [2021-06-10 14:50:52,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:50:52,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 185 transitions. [2021-06-10 14:50:52,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 30.833333333333332) internal successors, (185), 6 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:52,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:52,709 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:52,710 INFO L185 Difference]: Start difference. First operand has 66 places, 26 transitions, 226 flow. Second operand 6 states and 185 transitions. [2021-06-10 14:50:52,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 27 transitions, 268 flow [2021-06-10 14:50:52,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 27 transitions, 248 flow, removed 2 selfloop flow, removed 4 redundant places. [2021-06-10 14:50:52,711 INFO L241 Difference]: Finished difference. Result has 67 places, 23 transitions, 177 flow [2021-06-10 14:50:52,711 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=177, PETRI_PLACES=67, PETRI_TRANSITIONS=23} [2021-06-10 14:50:52,711 INFO L343 CegarLoopForPetriNet]: 30 programPoint places, 37 predicate places. [2021-06-10 14:50:52,711 INFO L480 AbstractCegarLoop]: Abstraction has has 67 places, 23 transitions, 177 flow [2021-06-10 14:50:52,711 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) [2021-06-10 14:50:52,711 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:50:52,711 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:50:52,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-06-10 14:50:52,711 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:50:52,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:50:52,711 INFO L82 PathProgramCache]: Analyzing trace with hash -45960629, now seen corresponding path program 22 times [2021-06-10 14:50:52,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:50:52,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012405134] [2021-06-10 14:50:52,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:50:52,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:50:52,727 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:52,727 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:50:52,727 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:52,728 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 14:50:52,734 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-06-10 14:50:52,734 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-06-10 14:50:52,741 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-06-10 14:50:52,743 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-06-10 14:50:52,755 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-10 14:50:52,756 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-10 14:50:52,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:50:52,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012405134] [2021-06-10 14:50:52,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:50:52,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 14:50:52,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689378080] [2021-06-10 14:50:52,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-10 14:50:52,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:50:52,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-10 14:50:52,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-10 14:50:52,767 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-06-10 14:50:52,767 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 23 transitions, 177 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) [2021-06-10 14:50:52,767 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:50:52,767 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-06-10 14:50:52,767 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:50:52,789 INFO L129 PetriNetUnfolder]: 0/38 cut-off events. [2021-06-10 14:50:52,789 INFO L130 PetriNetUnfolder]: For 71/71 co-relation queries the response was YES. [2021-06-10 14:50:52,789 INFO L84 FinitePrefix]: Finished finitePrefix Result has 144 conditions, 38 events. 0/38 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 94 event pairs, 0 based on Foata normal form. 1/39 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2021-06-10 14:50:52,789 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 5 selfloop transitions, 4 changer transitions 3/24 dead transitions. [2021-06-10 14:50:52,789 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 24 transitions, 205 flow [2021-06-10 14:50:52,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-10 14:50:52,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-10 14:50:52,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2021-06-10 14:50:52,790 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8761904761904762 [2021-06-10 14:50:52,790 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 184 transitions. [2021-06-10 14:50:52,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 184 transitions. [2021-06-10 14:50:52,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:50:52,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 184 transitions. [2021-06-10 14:50:52,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 30.666666666666668) internal successors, (184), 6 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:52,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:52,791 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:52,791 INFO L185 Difference]: Start difference. First operand has 67 places, 23 transitions, 177 flow. Second operand 6 states and 184 transitions. [2021-06-10 14:50:52,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 24 transitions, 205 flow [2021-06-10 14:50:52,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 24 transitions, 178 flow, removed 4 selfloop flow, removed 7 redundant places. [2021-06-10 14:50:52,792 INFO L241 Difference]: Finished difference. Result has 61 places, 20 transitions, 123 flow [2021-06-10 14:50:52,793 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=55, 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=123, PETRI_PLACES=61, PETRI_TRANSITIONS=20} [2021-06-10 14:50:52,793 INFO L343 CegarLoopForPetriNet]: 30 programPoint places, 31 predicate places. [2021-06-10 14:50:52,793 INFO L480 AbstractCegarLoop]: Abstraction has has 61 places, 20 transitions, 123 flow [2021-06-10 14:50:52,793 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) [2021-06-10 14:50:52,793 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:50:52,793 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:50:52,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-06-10 14:50:52,793 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:50:52,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:50:52,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1970293831, now seen corresponding path program 23 times [2021-06-10 14:50:52,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:50:52,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331399683] [2021-06-10 14:50:52,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:50:52,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:50:52,808 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:52,808 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:50:52,809 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:52,809 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 14:50:52,814 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:52,814 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 14:50:52,820 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-06-10 14:50:52,821 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-06-10 14:50:52,832 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-10 14:50:52,833 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-10 14:50:52,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:50:52,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331399683] [2021-06-10 14:50:52,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:50:52,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 14:50:52,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943366282] [2021-06-10 14:50:52,844 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-10 14:50:52,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:50:52,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-10 14:50:52,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-10 14:50:52,844 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-06-10 14:50:52,844 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 20 transitions, 123 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) [2021-06-10 14:50:52,844 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:50:52,844 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-06-10 14:50:52,844 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:50:52,868 INFO L129 PetriNetUnfolder]: 0/27 cut-off events. [2021-06-10 14:50:52,868 INFO L130 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2021-06-10 14:50:52,868 INFO L84 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 27 events. 0/27 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 39 event pairs, 0 based on Foata normal form. 1/28 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-06-10 14:50:52,868 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 3 selfloop transitions, 2 changer transitions 3/20 dead transitions. [2021-06-10 14:50:52,868 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 20 transitions, 139 flow [2021-06-10 14:50:52,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-10 14:50:52,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-10 14:50:52,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2021-06-10 14:50:52,869 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8666666666666667 [2021-06-10 14:50:52,869 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 182 transitions. [2021-06-10 14:50:52,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 182 transitions. [2021-06-10 14:50:52,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:50:52,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 182 transitions. [2021-06-10 14:50:52,869 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) [2021-06-10 14:50:52,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:52,870 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:52,870 INFO L185 Difference]: Start difference. First operand has 61 places, 20 transitions, 123 flow. Second operand 6 states and 182 transitions. [2021-06-10 14:50:52,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 20 transitions, 139 flow [2021-06-10 14:50:52,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 20 transitions, 122 flow, removed 2 selfloop flow, removed 6 redundant places. [2021-06-10 14:50:52,871 INFO L241 Difference]: Finished difference. Result has 59 places, 17 transitions, 78 flow [2021-06-10 14:50:52,871 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=78, PETRI_PLACES=59, PETRI_TRANSITIONS=17} [2021-06-10 14:50:52,871 INFO L343 CegarLoopForPetriNet]: 30 programPoint places, 29 predicate places. [2021-06-10 14:50:52,871 INFO L480 AbstractCegarLoop]: Abstraction has has 59 places, 17 transitions, 78 flow [2021-06-10 14:50:52,871 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) [2021-06-10 14:50:52,872 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 14:50:52,872 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 14:50:52,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-06-10 14:50:52,872 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-10 14:50:52,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 14:50:52,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1618698123, now seen corresponding path program 24 times [2021-06-10 14:50:52,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 14:50:52,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636501197] [2021-06-10 14:50:52,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 14:50:52,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 14:50:52,880 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:52,880 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 14:50:52,881 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:52,881 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 14:50:52,884 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 14:50:52,885 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-06-10 14:50:52,890 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-06-10 14:50:52,896 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-06-10 14:50:52,907 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-06-10 14:50:52,908 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-06-10 14:50:52,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 14:50:52,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636501197] [2021-06-10 14:50:52,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 14:50:52,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-10 14:50:52,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351665557] [2021-06-10 14:50:52,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-10 14:50:52,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 14:50:52,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-10 14:50:52,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-10 14:50:52,918 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-06-10 14:50:52,919 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 17 transitions, 78 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) [2021-06-10 14:50:52,919 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 14:50:52,919 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-06-10 14:50:52,919 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 14:50:52,940 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2021-06-10 14:50:52,940 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2021-06-10 14:50:52,940 INFO L84 FinitePrefix]: Finished finitePrefix Result has 57 conditions, 16 events. 0/16 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 6 event pairs, 0 based on Foata normal form. 1/17 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-06-10 14:50:52,940 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 0 selfloop transitions, 0 changer transitions 16/16 dead transitions. [2021-06-10 14:50:52,940 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 16 transitions, 82 flow [2021-06-10 14:50:52,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-10 14:50:52,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-10 14:50:52,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2021-06-10 14:50:52,940 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8523809523809524 [2021-06-10 14:50:52,940 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 179 transitions. [2021-06-10 14:50:52,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 179 transitions. [2021-06-10 14:50:52,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 14:50:52,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 179 transitions. [2021-06-10 14:50:52,941 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) [2021-06-10 14:50:52,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:52,942 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-10 14:50:52,942 INFO L185 Difference]: Start difference. First operand has 59 places, 17 transitions, 78 flow. Second operand 6 states and 179 transitions. [2021-06-10 14:50:52,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 16 transitions, 82 flow [2021-06-10 14:50:52,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 16 transitions, 63 flow, removed 2 selfloop flow, removed 9 redundant places. [2021-06-10 14:50:52,942 INFO L241 Difference]: Finished difference. Result has 43 places, 0 transitions, 0 flow [2021-06-10 14:50:52,942 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=43, PETRI_TRANSITIONS=0} [2021-06-10 14:50:52,942 INFO L343 CegarLoopForPetriNet]: 30 programPoint places, 13 predicate places. [2021-06-10 14:50:52,942 INFO L480 AbstractCegarLoop]: Abstraction has has 43 places, 0 transitions, 0 flow [2021-06-10 14:50:52,943 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) [2021-06-10 14:50:52,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-06-10 14:50:52,946 INFO L202 PluginConnector]: Adding new model example_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.06 02:50:52 BasicIcfg [2021-06-10 14:50:52,946 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-10 14:50:52,947 INFO L168 Benchmark]: Toolchain (without parser) took 3469.31 ms. Allocated memory is still 362.8 MB. Free memory was 341.6 MB in the beginning and 263.3 MB in the end (delta: 78.3 MB). Peak memory consumption was 76.6 MB. Max. memory is 16.0 GB. [2021-06-10 14:50:52,947 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 362.8 MB. Free memory is still 342.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-10 14:50:52,947 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.59 ms. Allocated memory is still 362.8 MB. Free memory was 341.6 MB in the beginning and 340.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-10 14:50:52,947 INFO L168 Benchmark]: Boogie Preprocessor took 9.02 ms. Allocated memory is still 362.8 MB. Free memory was 340.1 MB in the beginning and 339.3 MB in the end (delta: 780.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-10 14:50:52,947 INFO L168 Benchmark]: RCFGBuilder took 178.13 ms. Allocated memory is still 362.8 MB. Free memory was 339.2 MB in the beginning and 330.0 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-06-10 14:50:52,947 INFO L168 Benchmark]: TraceAbstraction took 3258.11 ms. Allocated memory is still 362.8 MB. Free memory was 329.5 MB in the beginning and 263.3 MB in the end (delta: 66.2 MB). Peak memory consumption was 66.1 MB. Max. memory is 16.0 GB. [2021-06-10 14:50:52,947 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 362.8 MB. Free memory is still 342.6 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.59 ms. Allocated memory is still 362.8 MB. Free memory was 341.6 MB in the beginning and 340.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 9.02 ms. Allocated memory is still 362.8 MB. Free memory was 340.1 MB in the beginning and 339.3 MB in the end (delta: 780.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 178.13 ms. Allocated memory is still 362.8 MB. Free memory was 339.2 MB in the beginning and 330.0 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 3258.11 ms. Allocated memory is still 362.8 MB. Free memory was 329.5 MB in the beginning and 263.3 MB in the end (delta: 66.2 MB). Peak memory consumption was 66.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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: 24.3ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 3130.0ms, OverallIterations: 27, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 1198.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 74.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 201 SDtfs, 248 SDslu, 129 SDs, 0 SdLazy, 351 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 217.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 153 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1167.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=463occurred in iteration=19, 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: 25.8ms SsaConstructionTime, 72.9ms SatisfiabilityAnalysisTime, 1533.2ms InterpolantComputationTime, 459 NumberOfCodeBlocks, 459 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 432 ConstructedInterpolants, 0 QuantifiedInterpolants, 6625 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...