/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 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 04:48:18,181 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 04:48:18,183 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 04:48:18,211 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-11 04:48:18,226 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-11 04:48:18,227 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-11 04:48:18,228 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-11 04:48:18,229 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-11 04:48:18,231 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-11 04:48:18,232 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-11 04:48:18,234 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-11 04:48:18,241 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-11 04:48:18,242 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-11 04:48:18,243 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-11 04:48:18,243 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-11 04:48:18,245 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-11 04:48:18,249 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-11 04:48:18,254 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-11 04:48:18,255 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-11 04:48:18,255 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-11 04:48:18,256 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 [2021-03-11 04:48:18,284 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 04:48:18,284 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 04:48:18,286 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 04:48:18,286 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 04:48:18,287 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 04:48:18,287 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 04:48:18,287 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 04:48:18,287 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 04:48:18,287 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 04:48:18,287 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 04:48:18,288 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 04:48:18,288 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 04:48:18,288 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 04:48:18,288 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 04:48:18,288 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 04:48:18,288 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 04:48:18,288 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 04:48:18,288 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 04:48:18,289 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 04:48:18,289 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 04:48:18,289 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 04:48:18,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 04:48:18,289 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 04:48:18,289 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 04:48:18,289 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 04:48:18,289 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 04:48:18,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 04:48:18,290 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-11 04:48:18,290 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-11 04:48:18,290 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 04:48:18,487 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 04:48:18,507 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 04:48:18,509 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 04:48:18,509 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-11 04:48:18,510 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-11 04:48:18,511 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_4.bpl [2021-03-11 04:48:18,511 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_4.bpl' [2021-03-11 04:48:18,542 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 04:48:18,546 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-11 04:48:18,547 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 04:48:18,547 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 04:48:18,547 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 04:48:18,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:48:18" (1/1) ... [2021-03-11 04:48:18,561 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:48:18" (1/1) ... [2021-03-11 04:48:18,566 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 04:48:18,567 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 04:48:18,567 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 04:48:18,567 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 04:48:18,572 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:48:18" (1/1) ... [2021-03-11 04:48:18,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:48:18" (1/1) ... [2021-03-11 04:48:18,573 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:48:18" (1/1) ... [2021-03-11 04:48:18,573 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:48:18" (1/1) ... [2021-03-11 04:48:18,575 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:48:18" (1/1) ... [2021-03-11 04:48:18,576 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:48:18" (1/1) ... [2021-03-11 04:48:18,576 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:48:18" (1/1) ... [2021-03-11 04:48:18,577 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 04:48:18,578 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 04:48:18,578 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 04:48:18,578 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 04:48:18,579 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:48:18" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 04:48:18,623 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_1 given in one single declaration [2021-03-11 04:48:18,623 INFO L130 BoogieDeclarations]: Found specification of procedure set_1 [2021-03-11 04:48:18,624 INFO L138 BoogieDeclarations]: Found implementation of procedure set_1 [2021-03-11 04:48:18,624 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_2 given in one single declaration [2021-03-11 04:48:18,624 INFO L130 BoogieDeclarations]: Found specification of procedure set_2 [2021-03-11 04:48:18,624 INFO L138 BoogieDeclarations]: Found implementation of procedure set_2 [2021-03-11 04:48:18,624 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_3 given in one single declaration [2021-03-11 04:48:18,624 INFO L130 BoogieDeclarations]: Found specification of procedure set_3 [2021-03-11 04:48:18,624 INFO L138 BoogieDeclarations]: Found implementation of procedure set_3 [2021-03-11 04:48:18,624 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_0 given in one single declaration [2021-03-11 04:48:18,624 INFO L130 BoogieDeclarations]: Found specification of procedure set_0 [2021-03-11 04:48:18,624 INFO L138 BoogieDeclarations]: Found implementation of procedure set_0 [2021-03-11 04:48:18,624 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-11 04:48:18,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 04:48:18,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 04:48:18,625 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-11 04:48:18,741 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 04:48:18,742 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-11 04:48:18,743 INFO L202 PluginConnector]: Adding new model example_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 04:48:18 BoogieIcfgContainer [2021-03-11 04:48:18,743 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 04:48:18,745 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 04:48:18,745 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 04:48:18,747 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 04:48:18,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:48:18" (1/2) ... [2021-03-11 04:48:18,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@580e42b7 and model type example_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 04:48:18, skipping insertion in model container [2021-03-11 04:48:18,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 04:48:18" (2/2) ... [2021-03-11 04:48:18,750 INFO L111 eAbstractionObserver]: Analyzing ICFG example_4.bpl [2021-03-11 04:48:18,757 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 04:48:18,759 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 04:48:18,760 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 04:48:18,838 INFO L149 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2021-03-11 04:48:18,849 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-03-11 04:48:18,879 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 04:48:18,879 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 04:48:18,879 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 04:48:18,879 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 04:48:18,879 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 04:48:18,879 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 04:48:18,879 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 04:48:18,879 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 04:48:18,899 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 36 places, 35 transitions, 138 flow [2021-03-11 04:48:18,931 INFO L129 PetriNetUnfolder]: 17/47 cut-off events. [2021-03-11 04:48:18,931 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-03-11 04:48:18,933 INFO L84 FinitePrefix]: Finished finitePrefix Result has 92 conditions, 47 events. 17/47 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 122 event pairs, 0 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 41. Up to 12 conditions per place. [2021-03-11 04:48:18,933 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 35 transitions, 138 flow [2021-03-11 04:48:18,936 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 29 transitions, 118 flow [2021-03-11 04:48:18,954 INFO L129 PetriNetUnfolder]: 17/44 cut-off events. [2021-03-11 04:48:18,954 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-03-11 04:48:18,954 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:48:18,955 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:48:18,955 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:48:18,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:48:18,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1165854259, now seen corresponding path program 1 times [2021-03-11 04:48:18,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:48:18,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034224354] [2021-03-11 04:48:18,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:48:19,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:48:19,059 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:19,060 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 04:48:19,066 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:19,067 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:48:19,073 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:19,074 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 04:48:19,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:48:19,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034224354] [2021-03-11 04:48:19,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:48:19,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 04:48:19,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925517398] [2021-03-11 04:48:19,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 04:48:19,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:48:19,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 04:48:19,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 04:48:19,090 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 35 [2021-03-11 04:48:19,091 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) [2021-03-11 04:48:19,092 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:48:19,092 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 35 [2021-03-11 04:48:19,092 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:48:19,106 INFO L129 PetriNetUnfolder]: 14/41 cut-off events. [2021-03-11 04:48:19,107 INFO L130 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2021-03-11 04:48:19,107 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. [2021-03-11 04:48:19,108 INFO L132 encePairwiseOnDemand]: 33/35 looper letters, 3 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2021-03-11 04:48:19,108 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 28 transitions, 121 flow [2021-03-11 04:48:19,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 04:48:19,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-11 04:48:19,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2021-03-11 04:48:19,115 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.9047619047619048 [2021-03-11 04:48:19,115 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 95 transitions. [2021-03-11 04:48:19,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 95 transitions. [2021-03-11 04:48:19,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:48:19,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 95 transitions. [2021-03-11 04:48:19,119 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) [2021-03-11 04:48:19,121 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) [2021-03-11 04:48:19,122 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) [2021-03-11 04:48:19,123 INFO L185 Difference]: Start difference. First operand has 30 places, 29 transitions, 118 flow. Second operand 3 states and 95 transitions. [2021-03-11 04:48:19,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 28 transitions, 121 flow [2021-03-11 04:48:19,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 28 transitions, 83 flow, removed 0 selfloop flow, removed 8 redundant places. [2021-03-11 04:48:19,127 INFO L241 Difference]: Finished difference. Result has 24 places, 28 transitions, 77 flow [2021-03-11 04:48:19,128 INFO L318 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} [2021-03-11 04:48:19,128 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, -6 predicate places. [2021-03-11 04:48:19,128 INFO L480 AbstractCegarLoop]: Abstraction has has 24 places, 28 transitions, 77 flow [2021-03-11 04:48:19,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:48:19,129 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:48:19,129 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:48:19,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 04:48:19,129 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:48:19,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:48:19,129 INFO L82 PathProgramCache]: Analyzing trace with hash 899557645, now seen corresponding path program 1 times [2021-03-11 04:48:19,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:48:19,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903835847] [2021-03-11 04:48:19,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:48:19,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:48:19,140 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:19,140 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 04:48:19,141 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:19,141 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:48:19,143 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:19,144 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 04:48:19,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:48:19,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903835847] [2021-03-11 04:48:19,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:48:19,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 04:48:19,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975297352] [2021-03-11 04:48:19,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 04:48:19,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:48:19,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 04:48:19,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 04:48:19,147 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 35 [2021-03-11 04:48:19,147 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) [2021-03-11 04:48:19,147 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:48:19,147 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 35 [2021-03-11 04:48:19,147 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:48:19,156 INFO L129 PetriNetUnfolder]: 6/29 cut-off events. [2021-03-11 04:48:19,156 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-03-11 04:48:19,156 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. [2021-03-11 04:48:19,156 INFO L132 encePairwiseOnDemand]: 32/35 looper letters, 2 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2021-03-11 04:48:19,156 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 26 transitions, 77 flow [2021-03-11 04:48:19,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 04:48:19,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-11 04:48:19,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2021-03-11 04:48:19,157 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.9047619047619048 [2021-03-11 04:48:19,158 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 95 transitions. [2021-03-11 04:48:19,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 95 transitions. [2021-03-11 04:48:19,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:48:19,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 95 transitions. [2021-03-11 04:48:19,159 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) [2021-03-11 04:48:19,159 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) [2021-03-11 04:48:19,159 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) [2021-03-11 04:48:19,159 INFO L185 Difference]: Start difference. First operand has 24 places, 28 transitions, 77 flow. Second operand 3 states and 95 transitions. [2021-03-11 04:48:19,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 26 transitions, 77 flow [2021-03-11 04:48:19,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 26 transitions, 76 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-11 04:48:19,161 INFO L241 Difference]: Finished difference. Result has 25 places, 26 transitions, 72 flow [2021-03-11 04:48:19,161 INFO L318 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} [2021-03-11 04:48:19,161 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, -5 predicate places. [2021-03-11 04:48:19,161 INFO L480 AbstractCegarLoop]: Abstraction has has 25 places, 26 transitions, 72 flow [2021-03-11 04:48:19,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:48:19,162 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:48:19,162 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:48:19,162 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 04:48:19,162 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:48:19,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:48:19,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1874494541, now seen corresponding path program 1 times [2021-03-11 04:48:19,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:48:19,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151855112] [2021-03-11 04:48:19,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:48:19,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:48:19,176 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:19,176 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 04:48:19,177 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:19,177 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:48:19,181 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:19,182 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 04:48:19,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:48:19,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151855112] [2021-03-11 04:48:19,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:48:19,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 04:48:19,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117263305] [2021-03-11 04:48:19,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 04:48:19,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:48:19,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 04:48:19,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 04:48:19,185 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 35 [2021-03-11 04:48:19,185 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) [2021-03-11 04:48:19,185 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:48:19,185 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 35 [2021-03-11 04:48:19,185 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:48:19,192 INFO L129 PetriNetUnfolder]: 0/17 cut-off events. [2021-03-11 04:48:19,192 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-03-11 04:48:19,193 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. [2021-03-11 04:48:19,193 INFO L132 encePairwiseOnDemand]: 31/35 looper letters, 1 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2021-03-11 04:48:19,193 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 17 transitions, 49 flow [2021-03-11 04:48:19,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 04:48:19,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-11 04:48:19,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2021-03-11 04:48:19,194 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.9047619047619048 [2021-03-11 04:48:19,194 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 95 transitions. [2021-03-11 04:48:19,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 95 transitions. [2021-03-11 04:48:19,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:48:19,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 95 transitions. [2021-03-11 04:48:19,195 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) [2021-03-11 04:48:19,195 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) [2021-03-11 04:48:19,196 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) [2021-03-11 04:48:19,196 INFO L185 Difference]: Start difference. First operand has 25 places, 26 transitions, 72 flow. Second operand 3 states and 95 transitions. [2021-03-11 04:48:19,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 17 transitions, 49 flow [2021-03-11 04:48:19,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 17 transitions, 48 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-11 04:48:19,197 INFO L241 Difference]: Finished difference. Result has 26 places, 17 transitions, 46 flow [2021-03-11 04:48:19,197 INFO L318 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} [2021-03-11 04:48:19,197 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, -4 predicate places. [2021-03-11 04:48:19,197 INFO L480 AbstractCegarLoop]: Abstraction has has 26 places, 17 transitions, 46 flow [2021-03-11 04:48:19,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:48:19,197 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:48:19,197 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:48:19,197 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-11 04:48:19,197 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:48:19,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:48:19,198 INFO L82 PathProgramCache]: Analyzing trace with hash 47653935, now seen corresponding path program 1 times [2021-03-11 04:48:19,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:48:19,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397961962] [2021-03-11 04:48:19,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:48:19,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:48:19,246 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:19,246 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 04:48:19,251 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:19,255 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:48:19,268 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-03-11 04:48:19,269 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-03-11 04:48:19,284 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-03-11 04:48:19,285 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-03-11 04:48:19,302 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-11 04:48:19,303 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-11 04:48:19,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:48:19,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397961962] [2021-03-11 04:48:19,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:48:19,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 04:48:19,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902316810] [2021-03-11 04:48:19,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 04:48:19,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:48:19,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 04:48:19,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-11 04:48:19,317 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-03-11 04:48:19,317 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) [2021-03-11 04:48:19,318 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:48:19,318 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-03-11 04:48:19,318 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:48:19,393 INFO L129 PetriNetUnfolder]: 15/83 cut-off events. [2021-03-11 04:48:19,393 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 04:48:19,394 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. [2021-03-11 04:48:19,394 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 9 selfloop transitions, 3 changer transitions 1/25 dead transitions. [2021-03-11 04:48:19,394 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 25 transitions, 88 flow [2021-03-11 04:48:19,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 04:48:19,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-11 04:48:19,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-03-11 04:48:19,396 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8952380952380953 [2021-03-11 04:48:19,396 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-03-11 04:48:19,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-03-11 04:48:19,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:48:19,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-03-11 04:48:19,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:48:19,398 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) [2021-03-11 04:48:19,398 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) [2021-03-11 04:48:19,398 INFO L185 Difference]: Start difference. First operand has 26 places, 17 transitions, 46 flow. Second operand 6 states and 188 transitions. [2021-03-11 04:48:19,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 25 transitions, 88 flow [2021-03-11 04:48:19,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 25 transitions, 87 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-11 04:48:19,399 INFO L241 Difference]: Finished difference. Result has 34 places, 19 transitions, 68 flow [2021-03-11 04:48:19,400 INFO L318 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} [2021-03-11 04:48:19,400 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, 4 predicate places. [2021-03-11 04:48:19,400 INFO L480 AbstractCegarLoop]: Abstraction has has 34 places, 19 transitions, 68 flow [2021-03-11 04:48:19,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:48:19,400 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:48:19,400 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:48:19,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-11 04:48:19,400 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:48:19,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:48:19,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1067670187, now seen corresponding path program 2 times [2021-03-11 04:48:19,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:48:19,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902390398] [2021-03-11 04:48:19,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:48:19,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:48:19,457 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:19,458 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 04:48:19,459 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:19,461 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:48:19,470 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:19,472 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-11 04:48:19,490 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-03-11 04:48:19,491 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-03-11 04:48:19,507 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-11 04:48:19,508 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-11 04:48:19,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:48:19,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902390398] [2021-03-11 04:48:19,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:48:19,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 04:48:19,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55298682] [2021-03-11 04:48:19,520 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 04:48:19,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:48:19,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 04:48:19,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-11 04:48:19,521 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-03-11 04:48:19,521 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) [2021-03-11 04:48:19,521 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:48:19,521 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-03-11 04:48:19,521 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:48:19,579 INFO L129 PetriNetUnfolder]: 13/107 cut-off events. [2021-03-11 04:48:19,579 INFO L130 PetriNetUnfolder]: For 65/65 co-relation queries the response was YES. [2021-03-11 04:48:19,580 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. [2021-03-11 04:48:19,581 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 9 selfloop transitions, 5 changer transitions 1/27 dead transitions. [2021-03-11 04:48:19,581 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 27 transitions, 133 flow [2021-03-11 04:48:19,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 04:48:19,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-11 04:48:19,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-03-11 04:48:19,585 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8952380952380953 [2021-03-11 04:48:19,585 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-03-11 04:48:19,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-03-11 04:48:19,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:48:19,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-03-11 04:48:19,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:48:19,588 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) [2021-03-11 04:48:19,588 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) [2021-03-11 04:48:19,589 INFO L185 Difference]: Start difference. First operand has 34 places, 19 transitions, 68 flow. Second operand 6 states and 188 transitions. [2021-03-11 04:48:19,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 27 transitions, 133 flow [2021-03-11 04:48:19,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 27 transitions, 123 flow, removed 3 selfloop flow, removed 2 redundant places. [2021-03-11 04:48:19,592 INFO L241 Difference]: Finished difference. Result has 40 places, 21 transitions, 99 flow [2021-03-11 04:48:19,592 INFO L318 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} [2021-03-11 04:48:19,593 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, 10 predicate places. [2021-03-11 04:48:19,593 INFO L480 AbstractCegarLoop]: Abstraction has has 40 places, 21 transitions, 99 flow [2021-03-11 04:48:19,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:48:19,593 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:48:19,593 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:48:19,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-11 04:48:19,593 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:48:19,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:48:19,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1930650155, now seen corresponding path program 3 times [2021-03-11 04:48:19,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:48:19,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894751381] [2021-03-11 04:48:19,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:48:19,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:48:19,642 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:19,642 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 04:48:19,643 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:19,643 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:48:19,648 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-03-11 04:48:19,649 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-03-11 04:48:19,657 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-03-11 04:48:19,657 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-03-11 04:48:19,679 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-11 04:48:19,680 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-11 04:48:19,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:48:19,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894751381] [2021-03-11 04:48:19,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:48:19,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 04:48:19,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733646658] [2021-03-11 04:48:19,693 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 04:48:19,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:48:19,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 04:48:19,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-11 04:48:19,693 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-03-11 04:48:19,694 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) [2021-03-11 04:48:19,694 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:48:19,694 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-03-11 04:48:19,694 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:48:19,750 INFO L129 PetriNetUnfolder]: 12/120 cut-off events. [2021-03-11 04:48:19,750 INFO L130 PetriNetUnfolder]: For 162/169 co-relation queries the response was YES. [2021-03-11 04:48:19,751 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. [2021-03-11 04:48:19,752 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 12 selfloop transitions, 6 changer transitions 3/33 dead transitions. [2021-03-11 04:48:19,752 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 33 transitions, 223 flow [2021-03-11 04:48:19,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 04:48:19,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-11 04:48:19,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-03-11 04:48:19,753 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8952380952380953 [2021-03-11 04:48:19,753 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-03-11 04:48:19,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-03-11 04:48:19,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:48:19,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-03-11 04:48:19,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:48:19,756 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) [2021-03-11 04:48:19,756 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) [2021-03-11 04:48:19,756 INFO L185 Difference]: Start difference. First operand has 40 places, 21 transitions, 99 flow. Second operand 6 states and 188 transitions. [2021-03-11 04:48:19,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 33 transitions, 223 flow [2021-03-11 04:48:19,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 33 transitions, 205 flow, removed 6 selfloop flow, removed 2 redundant places. [2021-03-11 04:48:19,759 INFO L241 Difference]: Finished difference. Result has 46 places, 24 transitions, 145 flow [2021-03-11 04:48:19,759 INFO L318 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} [2021-03-11 04:48:19,760 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, 16 predicate places. [2021-03-11 04:48:19,760 INFO L480 AbstractCegarLoop]: Abstraction has has 46 places, 24 transitions, 145 flow [2021-03-11 04:48:19,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:48:19,760 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:48:19,760 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:48:19,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-11 04:48:19,761 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:48:19,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:48:19,762 INFO L82 PathProgramCache]: Analyzing trace with hash 72053995, now seen corresponding path program 4 times [2021-03-11 04:48:19,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:48:19,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629711204] [2021-03-11 04:48:19,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:48:19,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:48:19,800 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:19,801 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 04:48:19,801 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:19,802 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:48:19,805 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:19,806 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-11 04:48:19,820 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-03-11 04:48:19,822 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-03-11 04:48:19,843 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-11 04:48:19,844 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-11 04:48:19,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:48:19,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629711204] [2021-03-11 04:48:19,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:48:19,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 04:48:19,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87628101] [2021-03-11 04:48:19,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 04:48:19,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:48:19,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 04:48:19,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-11 04:48:19,856 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-03-11 04:48:19,856 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) [2021-03-11 04:48:19,856 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:48:19,856 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-03-11 04:48:19,856 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:48:19,896 INFO L129 PetriNetUnfolder]: 9/128 cut-off events. [2021-03-11 04:48:19,896 INFO L130 PetriNetUnfolder]: For 258/262 co-relation queries the response was YES. [2021-03-11 04:48:19,897 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. [2021-03-11 04:48:19,897 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 11 selfloop transitions, 9 changer transitions 1/33 dead transitions. [2021-03-11 04:48:19,897 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 33 transitions, 251 flow [2021-03-11 04:48:19,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 04:48:19,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-11 04:48:19,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-03-11 04:48:19,898 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8952380952380953 [2021-03-11 04:48:19,898 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-03-11 04:48:19,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-03-11 04:48:19,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:48:19,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-03-11 04:48:19,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:48:19,899 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) [2021-03-11 04:48:19,899 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) [2021-03-11 04:48:19,899 INFO L185 Difference]: Start difference. First operand has 46 places, 24 transitions, 145 flow. Second operand 6 states and 188 transitions. [2021-03-11 04:48:19,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 33 transitions, 251 flow [2021-03-11 04:48:19,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 33 transitions, 229 flow, removed 8 selfloop flow, removed 4 redundant places. [2021-03-11 04:48:19,903 INFO L241 Difference]: Finished difference. Result has 50 places, 27 transitions, 200 flow [2021-03-11 04:48:19,904 INFO L318 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} [2021-03-11 04:48:19,904 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, 20 predicate places. [2021-03-11 04:48:19,904 INFO L480 AbstractCegarLoop]: Abstraction has has 50 places, 27 transitions, 200 flow [2021-03-11 04:48:19,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:48:19,904 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:48:19,904 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:48:19,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-11 04:48:19,904 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:48:19,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:48:19,904 INFO L82 PathProgramCache]: Analyzing trace with hash -359152829, now seen corresponding path program 5 times [2021-03-11 04:48:19,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:48:19,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203449539] [2021-03-11 04:48:19,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:48:19,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:48:19,943 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:19,943 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 04:48:19,944 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:19,944 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:48:19,950 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-03-11 04:48:19,951 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-03-11 04:48:19,961 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-03-11 04:48:19,963 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-03-11 04:48:19,976 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-11 04:48:19,978 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-11 04:48:19,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:48:19,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203449539] [2021-03-11 04:48:19,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:48:19,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 04:48:19,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102254711] [2021-03-11 04:48:19,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 04:48:19,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:48:19,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 04:48:19,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-11 04:48:19,996 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-03-11 04:48:19,996 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) [2021-03-11 04:48:19,996 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:48:19,996 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-03-11 04:48:19,996 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:48:20,027 INFO L129 PetriNetUnfolder]: 9/124 cut-off events. [2021-03-11 04:48:20,028 INFO L130 PetriNetUnfolder]: For 352/359 co-relation queries the response was YES. [2021-03-11 04:48:20,028 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. [2021-03-11 04:48:20,029 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 12 selfloop transitions, 9 changer transitions 2/35 dead transitions. [2021-03-11 04:48:20,029 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 35 transitions, 312 flow [2021-03-11 04:48:20,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 04:48:20,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-11 04:48:20,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-03-11 04:48:20,030 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8952380952380953 [2021-03-11 04:48:20,030 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-03-11 04:48:20,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-03-11 04:48:20,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:48:20,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-03-11 04:48:20,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:48:20,032 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) [2021-03-11 04:48:20,032 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) [2021-03-11 04:48:20,032 INFO L185 Difference]: Start difference. First operand has 50 places, 27 transitions, 200 flow. Second operand 6 states and 188 transitions. [2021-03-11 04:48:20,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 35 transitions, 312 flow [2021-03-11 04:48:20,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 35 transitions, 295 flow, removed 6 selfloop flow, removed 2 redundant places. [2021-03-11 04:48:20,034 INFO L241 Difference]: Finished difference. Result has 56 places, 29 transitions, 250 flow [2021-03-11 04:48:20,034 INFO L318 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} [2021-03-11 04:48:20,035 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, 26 predicate places. [2021-03-11 04:48:20,035 INFO L480 AbstractCegarLoop]: Abstraction has has 56 places, 29 transitions, 250 flow [2021-03-11 04:48:20,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:48:20,035 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:48:20,035 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:48:20,035 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-11 04:48:20,035 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:48:20,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:48:20,035 INFO L82 PathProgramCache]: Analyzing trace with hash 694111931, now seen corresponding path program 6 times [2021-03-11 04:48:20,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:48:20,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724001152] [2021-03-11 04:48:20,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:48:20,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:48:20,066 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:20,067 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 04:48:20,067 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:20,068 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:48:20,071 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:20,072 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-11 04:48:20,079 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-03-11 04:48:20,081 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-03-11 04:48:20,093 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-11 04:48:20,093 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-11 04:48:20,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:48:20,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724001152] [2021-03-11 04:48:20,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:48:20,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 04:48:20,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604763931] [2021-03-11 04:48:20,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 04:48:20,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:48:20,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 04:48:20,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-11 04:48:20,104 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-03-11 04:48:20,104 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) [2021-03-11 04:48:20,104 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:48:20,104 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-03-11 04:48:20,104 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:48:20,148 INFO L129 PetriNetUnfolder]: 5/149 cut-off events. [2021-03-11 04:48:20,149 INFO L130 PetriNetUnfolder]: For 543/548 co-relation queries the response was YES. [2021-03-11 04:48:20,149 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. [2021-03-11 04:48:20,149 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 21 selfloop transitions, 8 changer transitions 4/45 dead transitions. [2021-03-11 04:48:20,150 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 45 transitions, 511 flow [2021-03-11 04:48:20,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 04:48:20,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-11 04:48:20,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-03-11 04:48:20,151 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8952380952380953 [2021-03-11 04:48:20,151 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-03-11 04:48:20,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-03-11 04:48:20,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:48:20,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-03-11 04:48:20,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:48:20,152 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) [2021-03-11 04:48:20,152 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) [2021-03-11 04:48:20,152 INFO L185 Difference]: Start difference. First operand has 56 places, 29 transitions, 250 flow. Second operand 6 states and 188 transitions. [2021-03-11 04:48:20,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 45 transitions, 511 flow [2021-03-11 04:48:20,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 45 transitions, 484 flow, removed 8 selfloop flow, removed 3 redundant places. [2021-03-11 04:48:20,155 INFO L241 Difference]: Finished difference. Result has 61 places, 35 transitions, 361 flow [2021-03-11 04:48:20,155 INFO L318 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} [2021-03-11 04:48:20,155 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, 31 predicate places. [2021-03-11 04:48:20,155 INFO L480 AbstractCegarLoop]: Abstraction has has 61 places, 35 transitions, 361 flow [2021-03-11 04:48:20,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:48:20,156 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:48:20,156 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:48:20,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-11 04:48:20,156 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:48:20,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:48:20,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1317065419, now seen corresponding path program 7 times [2021-03-11 04:48:20,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:48:20,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310103612] [2021-03-11 04:48:20,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:48:20,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:48:20,171 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:20,171 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 04:48:20,172 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:20,173 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:48:20,179 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-03-11 04:48:20,180 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-03-11 04:48:20,191 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-03-11 04:48:20,191 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-03-11 04:48:20,204 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-11 04:48:20,205 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-11 04:48:20,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:48:20,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310103612] [2021-03-11 04:48:20,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:48:20,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 04:48:20,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260089882] [2021-03-11 04:48:20,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 04:48:20,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:48:20,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 04:48:20,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-11 04:48:20,218 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-03-11 04:48:20,218 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) [2021-03-11 04:48:20,218 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:48:20,218 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-03-11 04:48:20,218 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:48:20,262 INFO L129 PetriNetUnfolder]: 4/148 cut-off events. [2021-03-11 04:48:20,262 INFO L130 PetriNetUnfolder]: For 614/628 co-relation queries the response was YES. [2021-03-11 04:48:20,263 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. [2021-03-11 04:48:20,263 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 11 selfloop transitions, 14 changer transitions 2/39 dead transitions. [2021-03-11 04:48:20,263 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 39 transitions, 458 flow [2021-03-11 04:48:20,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 04:48:20,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-11 04:48:20,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2021-03-11 04:48:20,264 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8904761904761904 [2021-03-11 04:48:20,264 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 187 transitions. [2021-03-11 04:48:20,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 187 transitions. [2021-03-11 04:48:20,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:48:20,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 187 transitions. [2021-03-11 04:48:20,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.166666666666668) internal successors, (187), 6 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:48:20,265 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) [2021-03-11 04:48:20,265 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) [2021-03-11 04:48:20,265 INFO L185 Difference]: Start difference. First operand has 61 places, 35 transitions, 361 flow. Second operand 6 states and 187 transitions. [2021-03-11 04:48:20,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 39 transitions, 458 flow [2021-03-11 04:48:20,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 39 transitions, 445 flow, removed 4 selfloop flow, removed 3 redundant places. [2021-03-11 04:48:20,268 INFO L241 Difference]: Finished difference. Result has 65 places, 35 transitions, 393 flow [2021-03-11 04:48:20,268 INFO L318 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} [2021-03-11 04:48:20,268 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, 35 predicate places. [2021-03-11 04:48:20,268 INFO L480 AbstractCegarLoop]: Abstraction has has 65 places, 35 transitions, 393 flow [2021-03-11 04:48:20,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:48:20,268 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:48:20,268 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:48:20,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-03-11 04:48:20,268 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:48:20,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:48:20,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1896895597, now seen corresponding path program 8 times [2021-03-11 04:48:20,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:48:20,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31217881] [2021-03-11 04:48:20,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:48:20,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:48:20,278 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:20,278 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 04:48:20,278 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:20,279 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:48:20,282 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:20,283 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-11 04:48:20,289 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-03-11 04:48:20,290 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-03-11 04:48:20,303 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-11 04:48:20,304 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-11 04:48:20,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:48:20,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31217881] [2021-03-11 04:48:20,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:48:20,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 04:48:20,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463716936] [2021-03-11 04:48:20,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 04:48:20,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:48:20,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 04:48:20,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-11 04:48:20,331 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-03-11 04:48:20,331 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) [2021-03-11 04:48:20,331 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:48:20,331 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-03-11 04:48:20,331 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:48:20,370 INFO L129 PetriNetUnfolder]: 4/141 cut-off events. [2021-03-11 04:48:20,370 INFO L130 PetriNetUnfolder]: For 712/727 co-relation queries the response was YES. [2021-03-11 04:48:20,371 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. [2021-03-11 04:48:20,371 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 14 selfloop transitions, 12 changer transitions 5/43 dead transitions. [2021-03-11 04:48:20,371 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 43 transitions, 557 flow [2021-03-11 04:48:20,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 04:48:20,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-11 04:48:20,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-03-11 04:48:20,372 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8952380952380953 [2021-03-11 04:48:20,372 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-03-11 04:48:20,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-03-11 04:48:20,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:48:20,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-03-11 04:48:20,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:48:20,373 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) [2021-03-11 04:48:20,373 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) [2021-03-11 04:48:20,373 INFO L185 Difference]: Start difference. First operand has 65 places, 35 transitions, 393 flow. Second operand 6 states and 188 transitions. [2021-03-11 04:48:20,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 43 transitions, 557 flow [2021-03-11 04:48:20,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 43 transitions, 509 flow, removed 8 selfloop flow, removed 6 redundant places. [2021-03-11 04:48:20,376 INFO L241 Difference]: Finished difference. Result has 64 places, 34 transitions, 373 flow [2021-03-11 04:48:20,376 INFO L318 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} [2021-03-11 04:48:20,376 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, 34 predicate places. [2021-03-11 04:48:20,376 INFO L480 AbstractCegarLoop]: Abstraction has has 64 places, 34 transitions, 373 flow [2021-03-11 04:48:20,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:48:20,376 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:48:20,376 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:48:20,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-03-11 04:48:20,376 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:48:20,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:48:20,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1912364347, now seen corresponding path program 9 times [2021-03-11 04:48:20,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:48:20,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372185386] [2021-03-11 04:48:20,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:48:20,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:48:20,393 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:20,393 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 04:48:20,393 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:20,394 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:48:20,397 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:20,398 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-11 04:48:20,404 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-03-11 04:48:20,404 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-03-11 04:48:20,415 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-11 04:48:20,415 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-11 04:48:20,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:48:20,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372185386] [2021-03-11 04:48:20,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:48:20,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 04:48:20,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971050506] [2021-03-11 04:48:20,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 04:48:20,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:48:20,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 04:48:20,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-11 04:48:20,431 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-03-11 04:48:20,431 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) [2021-03-11 04:48:20,431 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:48:20,431 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-03-11 04:48:20,431 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:48:20,467 INFO L129 PetriNetUnfolder]: 4/122 cut-off events. [2021-03-11 04:48:20,467 INFO L130 PetriNetUnfolder]: For 569/586 co-relation queries the response was YES. [2021-03-11 04:48:20,468 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. [2021-03-11 04:48:20,468 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 11 selfloop transitions, 11 changer transitions 3/37 dead transitions. [2021-03-11 04:48:20,468 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 37 transitions, 455 flow [2021-03-11 04:48:20,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 04:48:20,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-11 04:48:20,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2021-03-11 04:48:20,469 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8904761904761904 [2021-03-11 04:48:20,469 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 187 transitions. [2021-03-11 04:48:20,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 187 transitions. [2021-03-11 04:48:20,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:48:20,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 187 transitions. [2021-03-11 04:48:20,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.166666666666668) internal successors, (187), 6 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:48:20,470 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) [2021-03-11 04:48:20,470 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) [2021-03-11 04:48:20,470 INFO L185 Difference]: Start difference. First operand has 64 places, 34 transitions, 373 flow. Second operand 6 states and 187 transitions. [2021-03-11 04:48:20,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 37 transitions, 455 flow [2021-03-11 04:48:20,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 37 transitions, 380 flow, removed 11 selfloop flow, removed 8 redundant places. [2021-03-11 04:48:20,472 INFO L241 Difference]: Finished difference. Result has 62 places, 33 transitions, 327 flow [2021-03-11 04:48:20,472 INFO L318 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} [2021-03-11 04:48:20,472 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, 32 predicate places. [2021-03-11 04:48:20,472 INFO L480 AbstractCegarLoop]: Abstraction has has 62 places, 33 transitions, 327 flow [2021-03-11 04:48:20,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:48:20,473 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:48:20,473 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:48:20,473 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-03-11 04:48:20,473 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:48:20,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:48:20,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1762812769, now seen corresponding path program 10 times [2021-03-11 04:48:20,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:48:20,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135988515] [2021-03-11 04:48:20,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:48:20,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:48:20,482 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:20,482 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 04:48:20,482 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:20,483 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:48:20,486 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:20,487 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-11 04:48:20,493 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-03-11 04:48:20,494 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-03-11 04:48:20,504 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-11 04:48:20,505 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-11 04:48:20,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:48:20,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135988515] [2021-03-11 04:48:20,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:48:20,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 04:48:20,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816793765] [2021-03-11 04:48:20,516 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 04:48:20,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:48:20,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 04:48:20,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-11 04:48:20,516 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-03-11 04:48:20,517 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) [2021-03-11 04:48:20,517 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:48:20,517 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-03-11 04:48:20,517 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:48:20,553 INFO L129 PetriNetUnfolder]: 4/112 cut-off events. [2021-03-11 04:48:20,553 INFO L130 PetriNetUnfolder]: For 373/388 co-relation queries the response was YES. [2021-03-11 04:48:20,553 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. [2021-03-11 04:48:20,554 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 12 selfloop transitions, 10 changer transitions 3/37 dead transitions. [2021-03-11 04:48:20,554 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 37 transitions, 418 flow [2021-03-11 04:48:20,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 04:48:20,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-11 04:48:20,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-03-11 04:48:20,555 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8952380952380953 [2021-03-11 04:48:20,555 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-03-11 04:48:20,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-03-11 04:48:20,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:48:20,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-03-11 04:48:20,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:48:20,556 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) [2021-03-11 04:48:20,556 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) [2021-03-11 04:48:20,556 INFO L185 Difference]: Start difference. First operand has 62 places, 33 transitions, 327 flow. Second operand 6 states and 188 transitions. [2021-03-11 04:48:20,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 37 transitions, 418 flow [2021-03-11 04:48:20,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 37 transitions, 382 flow, removed 5 selfloop flow, removed 5 redundant places. [2021-03-11 04:48:20,558 INFO L241 Difference]: Finished difference. Result has 62 places, 32 transitions, 318 flow [2021-03-11 04:48:20,558 INFO L318 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} [2021-03-11 04:48:20,558 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, 32 predicate places. [2021-03-11 04:48:20,558 INFO L480 AbstractCegarLoop]: Abstraction has has 62 places, 32 transitions, 318 flow [2021-03-11 04:48:20,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:48:20,558 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:48:20,558 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:48:20,558 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-03-11 04:48:20,558 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:48:20,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:48:20,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1190313287, now seen corresponding path program 11 times [2021-03-11 04:48:20,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:48:20,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386161322] [2021-03-11 04:48:20,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:48:20,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:48:20,568 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:20,568 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 04:48:20,568 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:20,569 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:48:20,573 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-03-11 04:48:20,573 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-03-11 04:48:20,584 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-03-11 04:48:20,585 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-03-11 04:48:20,598 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-11 04:48:20,598 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-11 04:48:20,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:48:20,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386161322] [2021-03-11 04:48:20,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:48:20,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 04:48:20,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267646801] [2021-03-11 04:48:20,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 04:48:20,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:48:20,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 04:48:20,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-11 04:48:20,613 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-03-11 04:48:20,613 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) [2021-03-11 04:48:20,613 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:48:20,613 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-03-11 04:48:20,613 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:48:20,648 INFO L129 PetriNetUnfolder]: 2/126 cut-off events. [2021-03-11 04:48:20,648 INFO L130 PetriNetUnfolder]: For 382/382 co-relation queries the response was YES. [2021-03-11 04:48:20,648 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. [2021-03-11 04:48:20,649 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 17 selfloop transitions, 11 changer transitions 2/42 dead transitions. [2021-03-11 04:48:20,649 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 42 transitions, 495 flow [2021-03-11 04:48:20,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 04:48:20,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-11 04:48:20,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-03-11 04:48:20,649 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8952380952380953 [2021-03-11 04:48:20,649 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-03-11 04:48:20,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-03-11 04:48:20,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:48:20,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-03-11 04:48:20,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:48:20,650 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) [2021-03-11 04:48:20,650 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) [2021-03-11 04:48:20,651 INFO L185 Difference]: Start difference. First operand has 62 places, 32 transitions, 318 flow. Second operand 6 states and 188 transitions. [2021-03-11 04:48:20,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 42 transitions, 495 flow [2021-03-11 04:48:20,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 42 transitions, 464 flow, removed 3 selfloop flow, removed 3 redundant places. [2021-03-11 04:48:20,652 INFO L241 Difference]: Finished difference. Result has 67 places, 35 transitions, 395 flow [2021-03-11 04:48:20,653 INFO L318 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} [2021-03-11 04:48:20,653 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, 37 predicate places. [2021-03-11 04:48:20,653 INFO L480 AbstractCegarLoop]: Abstraction has has 67 places, 35 transitions, 395 flow [2021-03-11 04:48:20,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:48:20,653 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:48:20,653 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:48:20,653 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-03-11 04:48:20,653 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:48:20,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:48:20,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1439433423, now seen corresponding path program 12 times [2021-03-11 04:48:20,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:48:20,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116791209] [2021-03-11 04:48:20,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:48:20,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:48:20,680 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:20,681 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 04:48:20,683 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:20,683 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:48:20,687 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-03-11 04:48:20,688 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-03-11 04:48:20,699 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-03-11 04:48:20,700 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-03-11 04:48:20,709 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-11 04:48:20,710 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-11 04:48:20,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:48:20,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116791209] [2021-03-11 04:48:20,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:48:20,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 04:48:20,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554131967] [2021-03-11 04:48:20,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 04:48:20,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:48:20,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 04:48:20,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-11 04:48:20,720 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-03-11 04:48:20,720 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) [2021-03-11 04:48:20,720 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:48:20,720 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-03-11 04:48:20,720 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:48:20,778 INFO L129 PetriNetUnfolder]: 2/117 cut-off events. [2021-03-11 04:48:20,778 INFO L130 PetriNetUnfolder]: For 423/426 co-relation queries the response was YES. [2021-03-11 04:48:20,778 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. [2021-03-11 04:48:20,778 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 19 selfloop transitions, 10 changer transitions 2/43 dead transitions. [2021-03-11 04:48:20,778 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 43 transitions, 531 flow [2021-03-11 04:48:20,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 04:48:20,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-11 04:48:20,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-03-11 04:48:20,779 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8952380952380953 [2021-03-11 04:48:20,779 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-03-11 04:48:20,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-03-11 04:48:20,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:48:20,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-03-11 04:48:20,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:48:20,780 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) [2021-03-11 04:48:20,780 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) [2021-03-11 04:48:20,781 INFO L185 Difference]: Start difference. First operand has 67 places, 35 transitions, 395 flow. Second operand 6 states and 188 transitions. [2021-03-11 04:48:20,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 43 transitions, 531 flow [2021-03-11 04:48:20,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 43 transitions, 510 flow, removed 6 selfloop flow, removed 3 redundant places. [2021-03-11 04:48:20,783 INFO L241 Difference]: Finished difference. Result has 71 places, 37 transitions, 440 flow [2021-03-11 04:48:20,783 INFO L318 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} [2021-03-11 04:48:20,783 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, 41 predicate places. [2021-03-11 04:48:20,784 INFO L480 AbstractCegarLoop]: Abstraction has has 71 places, 37 transitions, 440 flow [2021-03-11 04:48:20,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:48:20,784 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:48:20,784 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:48:20,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-03-11 04:48:20,784 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:48:20,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:48:20,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1233407489, now seen corresponding path program 13 times [2021-03-11 04:48:20,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:48:20,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411654221] [2021-03-11 04:48:20,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:48:20,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:48:20,807 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:20,807 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 04:48:20,808 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:20,809 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:48:20,813 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-03-11 04:48:20,813 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-03-11 04:48:20,828 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-03-11 04:48:20,828 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-03-11 04:48:20,840 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-11 04:48:20,840 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-11 04:48:20,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:48:20,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411654221] [2021-03-11 04:48:20,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:48:20,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 04:48:20,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92009287] [2021-03-11 04:48:20,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 04:48:20,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:48:20,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 04:48:20,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-11 04:48:20,851 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-03-11 04:48:20,852 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) [2021-03-11 04:48:20,852 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:48:20,852 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-03-11 04:48:20,852 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:48:20,879 INFO L129 PetriNetUnfolder]: 2/108 cut-off events. [2021-03-11 04:48:20,879 INFO L130 PetriNetUnfolder]: For 453/453 co-relation queries the response was YES. [2021-03-11 04:48:20,880 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. [2021-03-11 04:48:20,880 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 17 selfloop transitions, 9 changer transitions 3/41 dead transitions. [2021-03-11 04:48:20,880 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 41 transitions, 529 flow [2021-03-11 04:48:20,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 04:48:20,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-11 04:48:20,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2021-03-11 04:48:20,881 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8904761904761904 [2021-03-11 04:48:20,881 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 187 transitions. [2021-03-11 04:48:20,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 187 transitions. [2021-03-11 04:48:20,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:48:20,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 187 transitions. [2021-03-11 04:48:20,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.166666666666668) internal successors, (187), 6 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:48:20,882 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) [2021-03-11 04:48:20,882 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) [2021-03-11 04:48:20,882 INFO L185 Difference]: Start difference. First operand has 71 places, 37 transitions, 440 flow. Second operand 6 states and 187 transitions. [2021-03-11 04:48:20,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 41 transitions, 529 flow [2021-03-11 04:48:20,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 41 transitions, 518 flow, removed 3 selfloop flow, removed 2 redundant places. [2021-03-11 04:48:20,884 INFO L241 Difference]: Finished difference. Result has 74 places, 34 transitions, 405 flow [2021-03-11 04:48:20,884 INFO L318 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} [2021-03-11 04:48:20,884 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, 44 predicate places. [2021-03-11 04:48:20,884 INFO L480 AbstractCegarLoop]: Abstraction has has 74 places, 34 transitions, 405 flow [2021-03-11 04:48:20,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:48:20,884 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:48:20,885 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:48:20,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-03-11 04:48:20,885 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:48:20,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:48:20,885 INFO L82 PathProgramCache]: Analyzing trace with hash -873309823, now seen corresponding path program 14 times [2021-03-11 04:48:20,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:48:20,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421155872] [2021-03-11 04:48:20,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:48:20,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:48:20,893 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:20,893 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 04:48:20,894 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:20,894 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:48:20,898 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-03-11 04:48:20,899 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-03-11 04:48:20,907 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-03-11 04:48:20,908 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-03-11 04:48:20,919 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-11 04:48:20,919 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-11 04:48:20,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:48:20,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421155872] [2021-03-11 04:48:20,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:48:20,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 04:48:20,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352589776] [2021-03-11 04:48:20,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 04:48:20,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:48:20,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 04:48:20,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-11 04:48:20,930 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-03-11 04:48:20,930 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) [2021-03-11 04:48:20,931 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:48:20,931 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-03-11 04:48:20,931 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:48:20,964 INFO L129 PetriNetUnfolder]: 2/97 cut-off events. [2021-03-11 04:48:20,964 INFO L130 PetriNetUnfolder]: For 422/422 co-relation queries the response was YES. [2021-03-11 04:48:20,964 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. [2021-03-11 04:48:20,965 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 13 selfloop transitions, 9 changer transitions 3/37 dead transitions. [2021-03-11 04:48:20,965 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 37 transitions, 482 flow [2021-03-11 04:48:20,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 04:48:20,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-11 04:48:20,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2021-03-11 04:48:20,965 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8904761904761904 [2021-03-11 04:48:20,966 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 187 transitions. [2021-03-11 04:48:20,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 187 transitions. [2021-03-11 04:48:20,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:48:20,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 187 transitions. [2021-03-11 04:48:20,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.166666666666668) internal successors, (187), 6 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:48:20,967 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) [2021-03-11 04:48:20,967 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) [2021-03-11 04:48:20,967 INFO L185 Difference]: Start difference. First operand has 74 places, 34 transitions, 405 flow. Second operand 6 states and 187 transitions. [2021-03-11 04:48:20,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 37 transitions, 482 flow [2021-03-11 04:48:20,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 37 transitions, 446 flow, removed 7 selfloop flow, removed 5 redundant places. [2021-03-11 04:48:20,969 INFO L241 Difference]: Finished difference. Result has 74 places, 32 transitions, 362 flow [2021-03-11 04:48:20,969 INFO L318 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} [2021-03-11 04:48:20,970 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, 44 predicate places. [2021-03-11 04:48:20,970 INFO L480 AbstractCegarLoop]: Abstraction has has 74 places, 32 transitions, 362 flow [2021-03-11 04:48:20,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:48:20,970 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:48:20,970 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:48:20,970 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-03-11 04:48:20,970 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:48:20,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:48:20,970 INFO L82 PathProgramCache]: Analyzing trace with hash -557705213, now seen corresponding path program 15 times [2021-03-11 04:48:20,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:48:20,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471314204] [2021-03-11 04:48:20,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:48:20,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:48:20,988 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:20,988 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 04:48:20,989 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:20,989 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:48:20,993 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:20,993 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-11 04:48:21,000 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-03-11 04:48:21,000 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-03-11 04:48:21,010 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-11 04:48:21,011 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-11 04:48:21,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:48:21,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471314204] [2021-03-11 04:48:21,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:48:21,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 04:48:21,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353388443] [2021-03-11 04:48:21,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 04:48:21,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:48:21,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 04:48:21,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-11 04:48:21,024 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-03-11 04:48:21,024 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) [2021-03-11 04:48:21,024 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:48:21,024 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-03-11 04:48:21,024 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:48:21,063 INFO L129 PetriNetUnfolder]: 0/113 cut-off events. [2021-03-11 04:48:21,063 INFO L130 PetriNetUnfolder]: For 471/471 co-relation queries the response was YES. [2021-03-11 04:48:21,064 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. [2021-03-11 04:48:21,064 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 17 selfloop transitions, 10 changer transitions 2/41 dead transitions. [2021-03-11 04:48:21,064 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 41 transitions, 560 flow [2021-03-11 04:48:21,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 04:48:21,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-11 04:48:21,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-03-11 04:48:21,065 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8952380952380953 [2021-03-11 04:48:21,065 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-03-11 04:48:21,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-03-11 04:48:21,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:48:21,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-03-11 04:48:21,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:48:21,066 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) [2021-03-11 04:48:21,066 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) [2021-03-11 04:48:21,066 INFO L185 Difference]: Start difference. First operand has 74 places, 32 transitions, 362 flow. Second operand 6 states and 188 transitions. [2021-03-11 04:48:21,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 41 transitions, 560 flow [2021-03-11 04:48:21,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 41 transitions, 517 flow, removed 7 selfloop flow, removed 5 redundant places. [2021-03-11 04:48:21,068 INFO L241 Difference]: Finished difference. Result has 75 places, 36 transitions, 453 flow [2021-03-11 04:48:21,068 INFO L318 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} [2021-03-11 04:48:21,068 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, 45 predicate places. [2021-03-11 04:48:21,068 INFO L480 AbstractCegarLoop]: Abstraction has has 75 places, 36 transitions, 453 flow [2021-03-11 04:48:21,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:48:21,069 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:48:21,069 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:48:21,069 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-03-11 04:48:21,069 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:48:21,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:48:21,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1882332563, now seen corresponding path program 16 times [2021-03-11 04:48:21,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:48:21,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678594256] [2021-03-11 04:48:21,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:48:21,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:48:21,080 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:21,080 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 04:48:21,081 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:21,081 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:48:21,085 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:21,085 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-11 04:48:21,091 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-03-11 04:48:21,096 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-03-11 04:48:21,107 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-11 04:48:21,108 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-11 04:48:21,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:48:21,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678594256] [2021-03-11 04:48:21,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:48:21,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 04:48:21,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574998981] [2021-03-11 04:48:21,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 04:48:21,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:48:21,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 04:48:21,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-11 04:48:21,120 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-03-11 04:48:21,120 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) [2021-03-11 04:48:21,120 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:48:21,120 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-03-11 04:48:21,120 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:48:21,153 INFO L129 PetriNetUnfolder]: 0/104 cut-off events. [2021-03-11 04:48:21,153 INFO L130 PetriNetUnfolder]: For 448/450 co-relation queries the response was YES. [2021-03-11 04:48:21,153 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. [2021-03-11 04:48:21,153 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 17 selfloop transitions, 9 changer transitions 2/40 dead transitions. [2021-03-11 04:48:21,153 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 40 transitions, 544 flow [2021-03-11 04:48:21,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 04:48:21,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-11 04:48:21,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2021-03-11 04:48:21,154 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8952380952380953 [2021-03-11 04:48:21,154 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 188 transitions. [2021-03-11 04:48:21,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 188 transitions. [2021-03-11 04:48:21,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:48:21,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 188 transitions. [2021-03-11 04:48:21,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:48:21,155 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) [2021-03-11 04:48:21,156 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) [2021-03-11 04:48:21,156 INFO L185 Difference]: Start difference. First operand has 75 places, 36 transitions, 453 flow. Second operand 6 states and 188 transitions. [2021-03-11 04:48:21,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 40 transitions, 544 flow [2021-03-11 04:48:21,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 40 transitions, 530 flow, removed 4 selfloop flow, removed 3 redundant places. [2021-03-11 04:48:21,158 INFO L241 Difference]: Finished difference. Result has 79 places, 36 transitions, 463 flow [2021-03-11 04:48:21,158 INFO L318 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} [2021-03-11 04:48:21,159 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, 49 predicate places. [2021-03-11 04:48:21,159 INFO L480 AbstractCegarLoop]: Abstraction has has 79 places, 36 transitions, 463 flow [2021-03-11 04:48:21,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:48:21,159 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:48:21,159 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:48:21,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-03-11 04:48:21,159 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:48:21,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:48:21,160 INFO L82 PathProgramCache]: Analyzing trace with hash 452844333, now seen corresponding path program 17 times [2021-03-11 04:48:21,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:48:21,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781237463] [2021-03-11 04:48:21,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:48:21,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:48:21,170 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:21,171 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 04:48:21,171 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:21,172 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:48:21,176 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:21,176 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-11 04:48:21,182 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-03-11 04:48:21,183 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-03-11 04:48:21,193 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-11 04:48:21,194 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-11 04:48:21,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:48:21,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781237463] [2021-03-11 04:48:21,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:48:21,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 04:48:21,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026976299] [2021-03-11 04:48:21,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 04:48:21,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:48:21,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 04:48:21,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-11 04:48:21,206 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-03-11 04:48:21,206 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) [2021-03-11 04:48:21,206 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:48:21,206 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-03-11 04:48:21,206 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:48:21,241 INFO L129 PetriNetUnfolder]: 0/95 cut-off events. [2021-03-11 04:48:21,241 INFO L130 PetriNetUnfolder]: For 493/498 co-relation queries the response was YES. [2021-03-11 04:48:21,241 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. [2021-03-11 04:48:21,241 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 14 selfloop transitions, 8 changer transitions 3/37 dead transitions. [2021-03-11 04:48:21,241 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 37 transitions, 517 flow [2021-03-11 04:48:21,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 04:48:21,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-11 04:48:21,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2021-03-11 04:48:21,242 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8857142857142857 [2021-03-11 04:48:21,242 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 186 transitions. [2021-03-11 04:48:21,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 186 transitions. [2021-03-11 04:48:21,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:48:21,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 186 transitions. [2021-03-11 04:48:21,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.0) internal successors, (186), 6 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:48:21,243 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) [2021-03-11 04:48:21,243 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) [2021-03-11 04:48:21,243 INFO L185 Difference]: Start difference. First operand has 79 places, 36 transitions, 463 flow. Second operand 6 states and 186 transitions. [2021-03-11 04:48:21,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 37 transitions, 517 flow [2021-03-11 04:48:21,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 37 transitions, 506 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-03-11 04:48:21,245 INFO L241 Difference]: Finished difference. Result has 82 places, 33 transitions, 415 flow [2021-03-11 04:48:21,245 INFO L318 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} [2021-03-11 04:48:21,246 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, 52 predicate places. [2021-03-11 04:48:21,246 INFO L480 AbstractCegarLoop]: Abstraction has has 82 places, 33 transitions, 415 flow [2021-03-11 04:48:21,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:48:21,246 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:48:21,246 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:48:21,246 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-03-11 04:48:21,246 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:48:21,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:48:21,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1627308399, now seen corresponding path program 18 times [2021-03-11 04:48:21,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:48:21,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890352553] [2021-03-11 04:48:21,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:48:21,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:48:21,283 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:21,284 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 04:48:21,284 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:21,286 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:48:21,290 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-03-11 04:48:21,291 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-03-11 04:48:21,301 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-03-11 04:48:21,301 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-03-11 04:48:21,311 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-11 04:48:21,312 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-11 04:48:21,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:48:21,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890352553] [2021-03-11 04:48:21,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:48:21,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 04:48:21,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785152963] [2021-03-11 04:48:21,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 04:48:21,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:48:21,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 04:48:21,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-11 04:48:21,322 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-03-11 04:48:21,323 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) [2021-03-11 04:48:21,323 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:48:21,323 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-03-11 04:48:21,323 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:48:21,350 INFO L129 PetriNetUnfolder]: 0/82 cut-off events. [2021-03-11 04:48:21,350 INFO L130 PetriNetUnfolder]: For 394/394 co-relation queries the response was YES. [2021-03-11 04:48:21,351 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. [2021-03-11 04:48:21,351 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 12 selfloop transitions, 8 changer transitions 3/35 dead transitions. [2021-03-11 04:48:21,351 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 35 transitions, 477 flow [2021-03-11 04:48:21,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 04:48:21,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-11 04:48:21,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2021-03-11 04:48:21,352 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8904761904761904 [2021-03-11 04:48:21,352 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 187 transitions. [2021-03-11 04:48:21,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 187 transitions. [2021-03-11 04:48:21,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:48:21,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 187 transitions. [2021-03-11 04:48:21,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.166666666666668) internal successors, (187), 6 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:48:21,356 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) [2021-03-11 04:48:21,356 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) [2021-03-11 04:48:21,357 INFO L185 Difference]: Start difference. First operand has 82 places, 33 transitions, 415 flow. Second operand 6 states and 187 transitions. [2021-03-11 04:48:21,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 35 transitions, 477 flow [2021-03-11 04:48:21,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 35 transitions, 429 flow, removed 6 selfloop flow, removed 7 redundant places. [2021-03-11 04:48:21,359 INFO L241 Difference]: Finished difference. Result has 78 places, 30 transitions, 339 flow [2021-03-11 04:48:21,359 INFO L318 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} [2021-03-11 04:48:21,359 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, 48 predicate places. [2021-03-11 04:48:21,359 INFO L480 AbstractCegarLoop]: Abstraction has has 78 places, 30 transitions, 339 flow [2021-03-11 04:48:21,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:48:21,359 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:48:21,359 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:48:21,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-03-11 04:48:21,359 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:48:21,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:48:21,360 INFO L82 PathProgramCache]: Analyzing trace with hash -445195681, now seen corresponding path program 19 times [2021-03-11 04:48:21,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:48:21,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407630225] [2021-03-11 04:48:21,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:48:21,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:48:21,372 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:21,373 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 04:48:21,373 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:21,373 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:48:21,378 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:21,378 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-11 04:48:21,384 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-03-11 04:48:21,385 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-03-11 04:48:21,395 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-11 04:48:21,395 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-11 04:48:21,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:48:21,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407630225] [2021-03-11 04:48:21,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:48:21,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 04:48:21,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553144326] [2021-03-11 04:48:21,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 04:48:21,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:48:21,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 04:48:21,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-11 04:48:21,406 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-03-11 04:48:21,406 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) [2021-03-11 04:48:21,407 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:48:21,407 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-03-11 04:48:21,407 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:48:21,440 INFO L129 PetriNetUnfolder]: 0/71 cut-off events. [2021-03-11 04:48:21,440 INFO L130 PetriNetUnfolder]: For 267/267 co-relation queries the response was YES. [2021-03-11 04:48:21,440 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. [2021-03-11 04:48:21,440 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 9 selfloop transitions, 8 changer transitions 3/32 dead transitions. [2021-03-11 04:48:21,440 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 32 transitions, 395 flow [2021-03-11 04:48:21,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 04:48:21,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-11 04:48:21,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2021-03-11 04:48:21,441 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8904761904761904 [2021-03-11 04:48:21,442 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 187 transitions. [2021-03-11 04:48:21,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 187 transitions. [2021-03-11 04:48:21,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:48:21,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 187 transitions. [2021-03-11 04:48:21,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.166666666666668) internal successors, (187), 6 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:48:21,442 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) [2021-03-11 04:48:21,442 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) [2021-03-11 04:48:21,442 INFO L185 Difference]: Start difference. First operand has 78 places, 30 transitions, 339 flow. Second operand 6 states and 187 transitions. [2021-03-11 04:48:21,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 32 transitions, 395 flow [2021-03-11 04:48:21,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 32 transitions, 348 flow, removed 4 selfloop flow, removed 7 redundant places. [2021-03-11 04:48:21,445 INFO L241 Difference]: Finished difference. Result has 72 places, 27 transitions, 271 flow [2021-03-11 04:48:21,445 INFO L318 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} [2021-03-11 04:48:21,445 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, 42 predicate places. [2021-03-11 04:48:21,445 INFO L480 AbstractCegarLoop]: Abstraction has has 72 places, 27 transitions, 271 flow [2021-03-11 04:48:21,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:48:21,445 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:48:21,445 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:48:21,445 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-03-11 04:48:21,445 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:48:21,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:48:21,445 INFO L82 PathProgramCache]: Analyzing trace with hash 2133833347, now seen corresponding path program 20 times [2021-03-11 04:48:21,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:48:21,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352886988] [2021-03-11 04:48:21,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:48:21,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:48:21,456 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:21,456 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 04:48:21,456 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:21,457 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:48:21,460 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-03-11 04:48:21,461 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-03-11 04:48:21,467 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-03-11 04:48:21,467 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-03-11 04:48:21,478 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-11 04:48:21,479 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-11 04:48:21,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:48:21,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352886988] [2021-03-11 04:48:21,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:48:21,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 04:48:21,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878268641] [2021-03-11 04:48:21,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 04:48:21,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:48:21,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 04:48:21,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-11 04:48:21,493 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-03-11 04:48:21,493 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) [2021-03-11 04:48:21,493 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:48:21,493 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-03-11 04:48:21,493 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:48:21,523 INFO L129 PetriNetUnfolder]: 0/60 cut-off events. [2021-03-11 04:48:21,524 INFO L130 PetriNetUnfolder]: For 187/189 co-relation queries the response was YES. [2021-03-11 04:48:21,524 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. [2021-03-11 04:48:21,524 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 10 selfloop transitions, 6 changer transitions 2/30 dead transitions. [2021-03-11 04:48:21,524 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 30 transitions, 332 flow [2021-03-11 04:48:21,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 04:48:21,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-11 04:48:21,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2021-03-11 04:48:21,526 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8904761904761904 [2021-03-11 04:48:21,526 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 187 transitions. [2021-03-11 04:48:21,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 187 transitions. [2021-03-11 04:48:21,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:48:21,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 187 transitions. [2021-03-11 04:48:21,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.166666666666668) internal successors, (187), 6 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:48:21,528 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) [2021-03-11 04:48:21,528 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) [2021-03-11 04:48:21,528 INFO L185 Difference]: Start difference. First operand has 72 places, 27 transitions, 271 flow. Second operand 6 states and 187 transitions. [2021-03-11 04:48:21,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 30 transitions, 332 flow [2021-03-11 04:48:21,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 30 transitions, 285 flow, removed 4 selfloop flow, removed 8 redundant places. [2021-03-11 04:48:21,529 INFO L241 Difference]: Finished difference. Result has 66 places, 26 transitions, 226 flow [2021-03-11 04:48:21,529 INFO L318 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} [2021-03-11 04:48:21,529 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, 36 predicate places. [2021-03-11 04:48:21,530 INFO L480 AbstractCegarLoop]: Abstraction has has 66 places, 26 transitions, 226 flow [2021-03-11 04:48:21,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:48:21,530 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:48:21,530 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:48:21,530 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-03-11 04:48:21,530 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:48:21,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:48:21,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1300245775, now seen corresponding path program 21 times [2021-03-11 04:48:21,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:48:21,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856689185] [2021-03-11 04:48:21,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:48:21,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:48:21,542 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:21,542 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 04:48:21,543 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:21,543 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:48:21,547 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-03-11 04:48:21,547 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-03-11 04:48:21,554 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-03-11 04:48:21,554 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-03-11 04:48:21,564 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-11 04:48:21,565 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-11 04:48:21,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:48:21,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856689185] [2021-03-11 04:48:21,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:48:21,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 04:48:21,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386602798] [2021-03-11 04:48:21,575 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 04:48:21,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:48:21,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 04:48:21,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-11 04:48:21,576 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-03-11 04:48:21,576 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) [2021-03-11 04:48:21,576 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:48:21,576 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-03-11 04:48:21,576 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:48:21,600 INFO L129 PetriNetUnfolder]: 0/51 cut-off events. [2021-03-11 04:48:21,600 INFO L130 PetriNetUnfolder]: For 133/133 co-relation queries the response was YES. [2021-03-11 04:48:21,600 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. [2021-03-11 04:48:21,600 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 8 selfloop transitions, 3 changer transitions 4/27 dead transitions. [2021-03-11 04:48:21,600 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 27 transitions, 268 flow [2021-03-11 04:48:21,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 04:48:21,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-11 04:48:21,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2021-03-11 04:48:21,601 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8809523809523809 [2021-03-11 04:48:21,601 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 185 transitions. [2021-03-11 04:48:21,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 185 transitions. [2021-03-11 04:48:21,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:48:21,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 185 transitions. [2021-03-11 04:48:21,602 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) [2021-03-11 04:48:21,602 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) [2021-03-11 04:48:21,602 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) [2021-03-11 04:48:21,602 INFO L185 Difference]: Start difference. First operand has 66 places, 26 transitions, 226 flow. Second operand 6 states and 185 transitions. [2021-03-11 04:48:21,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 27 transitions, 268 flow [2021-03-11 04:48:21,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 27 transitions, 248 flow, removed 2 selfloop flow, removed 4 redundant places. [2021-03-11 04:48:21,603 INFO L241 Difference]: Finished difference. Result has 67 places, 23 transitions, 177 flow [2021-03-11 04:48:21,603 INFO L318 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} [2021-03-11 04:48:21,603 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, 37 predicate places. [2021-03-11 04:48:21,603 INFO L480 AbstractCegarLoop]: Abstraction has has 67 places, 23 transitions, 177 flow [2021-03-11 04:48:21,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:48:21,603 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:48:21,603 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:48:21,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-03-11 04:48:21,604 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:48:21,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:48:21,604 INFO L82 PathProgramCache]: Analyzing trace with hash -45960629, now seen corresponding path program 22 times [2021-03-11 04:48:21,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:48:21,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173950079] [2021-03-11 04:48:21,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:48:21,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:48:21,620 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:21,621 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 04:48:21,621 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:21,621 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:48:21,625 INFO L142 QuantifierPusher]: treesize reduction 9, result has 62.5 percent of original size [2021-03-11 04:48:21,625 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-03-11 04:48:21,632 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-03-11 04:48:21,632 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-03-11 04:48:21,644 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-11 04:48:21,645 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-11 04:48:21,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:48:21,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173950079] [2021-03-11 04:48:21,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:48:21,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 04:48:21,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593647499] [2021-03-11 04:48:21,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 04:48:21,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:48:21,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 04:48:21,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-11 04:48:21,656 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-03-11 04:48:21,656 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) [2021-03-11 04:48:21,656 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:48:21,656 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-03-11 04:48:21,656 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:48:21,677 INFO L129 PetriNetUnfolder]: 0/38 cut-off events. [2021-03-11 04:48:21,677 INFO L130 PetriNetUnfolder]: For 71/71 co-relation queries the response was YES. [2021-03-11 04:48:21,677 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. [2021-03-11 04:48:21,677 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 5 selfloop transitions, 4 changer transitions 3/24 dead transitions. [2021-03-11 04:48:21,677 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 24 transitions, 205 flow [2021-03-11 04:48:21,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 04:48:21,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-11 04:48:21,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2021-03-11 04:48:21,678 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8761904761904762 [2021-03-11 04:48:21,678 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 184 transitions. [2021-03-11 04:48:21,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 184 transitions. [2021-03-11 04:48:21,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:48:21,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 184 transitions. [2021-03-11 04:48:21,679 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) [2021-03-11 04:48:21,679 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) [2021-03-11 04:48:21,679 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) [2021-03-11 04:48:21,679 INFO L185 Difference]: Start difference. First operand has 67 places, 23 transitions, 177 flow. Second operand 6 states and 184 transitions. [2021-03-11 04:48:21,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 24 transitions, 205 flow [2021-03-11 04:48:21,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 24 transitions, 178 flow, removed 4 selfloop flow, removed 7 redundant places. [2021-03-11 04:48:21,680 INFO L241 Difference]: Finished difference. Result has 61 places, 20 transitions, 123 flow [2021-03-11 04:48:21,680 INFO L318 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} [2021-03-11 04:48:21,680 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, 31 predicate places. [2021-03-11 04:48:21,681 INFO L480 AbstractCegarLoop]: Abstraction has has 61 places, 20 transitions, 123 flow [2021-03-11 04:48:21,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:48:21,681 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:48:21,681 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:48:21,681 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-03-11 04:48:21,681 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:48:21,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:48:21,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1970293831, now seen corresponding path program 23 times [2021-03-11 04:48:21,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:48:21,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861789024] [2021-03-11 04:48:21,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:48:21,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:48:21,691 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:21,692 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 04:48:21,692 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:21,692 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:48:21,697 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:21,697 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-11 04:48:21,703 INFO L142 QuantifierPusher]: treesize reduction 18, result has 56.1 percent of original size [2021-03-11 04:48:21,704 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-03-11 04:48:21,714 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-11 04:48:21,715 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-11 04:48:21,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:48:21,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861789024] [2021-03-11 04:48:21,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:48:21,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 04:48:21,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010186806] [2021-03-11 04:48:21,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 04:48:21,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:48:21,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 04:48:21,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-11 04:48:21,726 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-03-11 04:48:21,727 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) [2021-03-11 04:48:21,727 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:48:21,727 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-03-11 04:48:21,727 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:48:21,745 INFO L129 PetriNetUnfolder]: 0/27 cut-off events. [2021-03-11 04:48:21,745 INFO L130 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2021-03-11 04:48:21,745 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. [2021-03-11 04:48:21,746 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 3 selfloop transitions, 2 changer transitions 3/20 dead transitions. [2021-03-11 04:48:21,746 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 20 transitions, 139 flow [2021-03-11 04:48:21,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 04:48:21,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-11 04:48:21,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2021-03-11 04:48:21,746 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8666666666666667 [2021-03-11 04:48:21,746 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 182 transitions. [2021-03-11 04:48:21,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 182 transitions. [2021-03-11 04:48:21,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:48:21,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 182 transitions. [2021-03-11 04:48:21,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:48:21,747 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) [2021-03-11 04:48:21,747 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) [2021-03-11 04:48:21,747 INFO L185 Difference]: Start difference. First operand has 61 places, 20 transitions, 123 flow. Second operand 6 states and 182 transitions. [2021-03-11 04:48:21,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 20 transitions, 139 flow [2021-03-11 04:48:21,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 20 transitions, 122 flow, removed 2 selfloop flow, removed 6 redundant places. [2021-03-11 04:48:21,748 INFO L241 Difference]: Finished difference. Result has 59 places, 17 transitions, 78 flow [2021-03-11 04:48:21,748 INFO L318 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} [2021-03-11 04:48:21,748 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, 29 predicate places. [2021-03-11 04:48:21,748 INFO L480 AbstractCegarLoop]: Abstraction has has 59 places, 17 transitions, 78 flow [2021-03-11 04:48:21,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:48:21,749 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:48:21,749 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:48:21,749 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-03-11 04:48:21,749 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:48:21,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:48:21,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1618698123, now seen corresponding path program 24 times [2021-03-11 04:48:21,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:48:21,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738848703] [2021-03-11 04:48:21,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:48:21,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:48:21,758 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:21,758 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 04:48:21,758 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:21,759 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:48:21,762 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:48:21,762 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-11 04:48:21,769 INFO L142 QuantifierPusher]: treesize reduction 9, result has 70.0 percent of original size [2021-03-11 04:48:21,774 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-03-11 04:48:21,785 INFO L142 QuantifierPusher]: treesize reduction 27, result has 48.1 percent of original size [2021-03-11 04:48:21,785 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-03-11 04:48:21,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:48:21,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738848703] [2021-03-11 04:48:21,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:48:21,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 04:48:21,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576188541] [2021-03-11 04:48:21,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 04:48:21,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:48:21,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 04:48:21,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-11 04:48:21,796 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 35 [2021-03-11 04:48:21,796 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) [2021-03-11 04:48:21,796 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:48:21,796 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 35 [2021-03-11 04:48:21,796 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:48:21,817 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2021-03-11 04:48:21,817 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2021-03-11 04:48:21,817 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. [2021-03-11 04:48:21,817 INFO L132 encePairwiseOnDemand]: 30/35 looper letters, 0 selfloop transitions, 0 changer transitions 16/16 dead transitions. [2021-03-11 04:48:21,818 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 16 transitions, 82 flow [2021-03-11 04:48:21,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 04:48:21,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-11 04:48:21,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2021-03-11 04:48:21,818 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8523809523809524 [2021-03-11 04:48:21,818 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 179 transitions. [2021-03-11 04:48:21,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 179 transitions. [2021-03-11 04:48:21,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:48:21,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 179 transitions. [2021-03-11 04:48:21,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:48:21,819 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) [2021-03-11 04:48:21,820 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) [2021-03-11 04:48:21,820 INFO L185 Difference]: Start difference. First operand has 59 places, 17 transitions, 78 flow. Second operand 6 states and 179 transitions. [2021-03-11 04:48:21,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 16 transitions, 82 flow [2021-03-11 04:48:21,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 16 transitions, 63 flow, removed 2 selfloop flow, removed 9 redundant places. [2021-03-11 04:48:21,820 INFO L241 Difference]: Finished difference. Result has 43 places, 0 transitions, 0 flow [2021-03-11 04:48:21,820 INFO L318 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} [2021-03-11 04:48:21,820 INFO L335 CegarLoopForPetriNet]: 30 programPoint places, 13 predicate places. [2021-03-11 04:48:21,820 INFO L480 AbstractCegarLoop]: Abstraction has has 43 places, 0 transitions, 0 flow [2021-03-11 04:48:21,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:48:21,820 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-03-11 04:48:21,824 INFO L202 PluginConnector]: Adding new model example_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 04:48:21 BasicIcfg [2021-03-11 04:48:21,824 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 04:48:21,824 INFO L168 Benchmark]: Toolchain (without parser) took 3280.32 ms. Allocated memory was 255.9 MB in the beginning and 343.9 MB in the end (delta: 88.1 MB). Free memory was 237.0 MB in the beginning and 170.1 MB in the end (delta: 66.9 MB). Peak memory consumption was 152.9 MB. Max. memory is 16.0 GB. [2021-03-11 04:48:21,824 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.08 ms. Allocated memory is still 255.9 MB. Free memory was 238.0 MB in the beginning and 237.9 MB in the end (delta: 109.0 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 04:48:21,824 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.12 ms. Allocated memory is still 255.9 MB. Free memory was 236.5 MB in the beginning and 234.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 04:48:21,824 INFO L168 Benchmark]: Boogie Preprocessor took 10.29 ms. Allocated memory is still 255.9 MB. Free memory was 234.9 MB in the beginning and 234.1 MB in the end (delta: 830.6 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 04:48:21,825 INFO L168 Benchmark]: RCFGBuilder took 165.37 ms. Allocated memory is still 255.9 MB. Free memory was 234.0 MB in the beginning and 241.3 MB in the end (delta: -7.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 16.0 GB. [2021-03-11 04:48:21,825 INFO L168 Benchmark]: TraceAbstraction took 3079.22 ms. Allocated memory was 255.9 MB in the beginning and 343.9 MB in the end (delta: 88.1 MB). Free memory was 240.9 MB in the beginning and 170.1 MB in the end (delta: 70.8 MB). Peak memory consumption was 155.6 MB. Max. memory is 16.0 GB. [2021-03-11 04:48:21,826 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 0.08 ms. Allocated memory is still 255.9 MB. Free memory was 238.0 MB in the beginning and 237.9 MB in the end (delta: 109.0 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.12 ms. Allocated memory is still 255.9 MB. Free memory was 236.5 MB in the beginning and 234.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 10.29 ms. Allocated memory is still 255.9 MB. Free memory was 234.9 MB in the beginning and 234.1 MB in the end (delta: 830.6 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 165.37 ms. Allocated memory is still 255.9 MB. Free memory was 234.0 MB in the beginning and 241.3 MB in the end (delta: -7.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 16.0 GB. * TraceAbstraction took 3079.22 ms. Allocated memory was 255.9 MB in the beginning and 343.9 MB in the end (delta: 88.1 MB). Free memory was 240.9 MB in the beginning and 170.1 MB in the end (delta: 70.8 MB). Peak memory consumption was 155.6 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 15.3ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 2944.7ms, OverallIterations: 27, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 1127.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 59.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 201 SDtfs, 248 SDslu, 129 SDs, 0 SdLazy, 351 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 211.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 153 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1133.4ms 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: 26.4ms SsaConstructionTime, 72.7ms SatisfiabilityAnalysisTime, 1465.1ms 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 RESULT: Ultimate proved your program to be correct! Received shutdown request...